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yap-6.3/packages/chr/chr_translate.chr
2015-10-13 08:17:51 +01:00

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/* $Id$
Part of CHR (Constraint Handling Rules)
Author: Tom Schrijvers
E-mail: Tom.Schrijvers@cs.kuleuven.be
WWW: http://www.swi-prolog.org
Copyright (C): 2003-2004, K.U. Leuven
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, if you link this library with other files,
compiled with a Free Software compiler, to produce an executable, this
library does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% ____ _ _ ____ ____ _ _
%% / ___| | | | _ \ / ___|___ _ __ ___ _ __ (_) | ___ _ __
%% | | | |_| | |_) | | | / _ \| '_ ` _ \| '_ \| | |/ _ \ '__|
%% | |___| _ | _ < | |__| (_) | | | | | | |_) | | | __/ |
%% \____|_| |_|_| \_\ \____\___/|_| |_| |_| .__/|_|_|\___|_|
%% |_|
%%
%% hProlog CHR compiler:
%%
%% * by Tom Schrijvers, K.U. Leuven, Tom.Schrijvers@cs.kuleuven.be
%%
%% * based on the SICStus CHR compilation by Christian Holzbaur
%%
%% First working version: 6 June 2003
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% TODO {{{
%%
%% URGENTLY TODO
%%
%% * add mode checking to debug mode
%% * add groundness info to a.i.-based observation analysis
%% * proper fd/index analysis
%% * re-add generation checking
%% * untangle CHR-level and target source-level generation & optimization
%%
%% AGGRESSIVE OPTIMISATION IDEAS
%%
%% * analyze history usage to determine whether/when
%% cheaper suspension is possible:
%% don't use history when all partners are passive and self never triggers
%% * store constraint unconditionally for unconditional propagation rule,
%% if first, i.e. without checking history and set trigger cont to next occ
%% * get rid of suspension passing for never triggered constraints,
%% up to allocation occurrence
%% * get rid of call indirection for never triggered constraints
%% up to first allocation occurrence.
%% * get rid of unnecessary indirection if last active occurrence
%% before unconditional removal is head2, e.g.
%% a \ b <=> true.
%% a <=> true.
%% * Eliminate last clause of never stored constraint, if its body
%% is fail, e.g.
%% a ...
%% a <=> fail.
%% * Specialize lookup operations and indexes for functional dependencies.
%%
%% MORE TODO
%%
%% * map A \ B <=> true | true rules
%% onto efficient code that empties the constraint stores of B
%% in O(1) time for ground constraints where A and B do not share
%% any variables
%% * ground matching seems to be not optimized for compound terms
%% in case of simpagation_head2 and propagation occurrences
%% * analysis for storage delaying (see primes for case)
%% * internal constraints declaration + analyses?
%% * Do not store in global variable store if not necessary
%% NOTE: affects show_store/1
%% * var_assoc multi-level store: variable - ground
%% * Do not maintain/check unnecessary propagation history
%% for reasons of anti-monotony
%% * Strengthen storage analysis for propagation rules
%% reason about bodies of rules only containing constraints
%% -> fixpoint with observation analysis
%% * instantiation declarations
%% COMPOUND (bound to nonvar)
%% avoid nonvar tests
%%
%% * make difference between cheap guards for reordering
%% and non-binding guards for lock removal
%% * fd -> once/[] transformation for propagation
%% * cheap guards interleaved with head retrieval + faster
%% via-retrieval + non-empty checking for propagation rules
%% redo for simpagation_head2 prelude
%% * intelligent backtracking for simplification/simpagation rule
%% generator_1(X),'_$savecp'(CP_1),
%% ...
%% if( (
%% generator_n(Y),
%% test(X,Y)
%% ),
%% true,
%% ('_$cutto'(CP_1), fail)
%% ),
%% ...
%%
%% or recently developped cascading-supported approach
%% * intelligent backtracking for propagation rule
%% use additional boolean argument for each possible smart backtracking
%% when boolean at end of list true -> no smart backtracking
%% false -> smart backtracking
%% only works for rules with at least 3 constraints in the head
%% * (set semantics + functional dependency) declaration + resolution
%% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- module(chr_translate,
[ chr_translate/2 % +Decls, -TranslatedDecls
, chr_translate_line_info/3 % +DeclsWithLines, -TranslatedDecls
]).
%% SWI begin {{{
:- use_module(library(lists),[member/2, append/3,reverse/2,permutation/2,last/2]).
:- use_module(library(ordsets)).
:- use_module(library(aggregate)).
:- use_module(library(apply_macros)).
:- use_module(library(occurs)).
:- use_module(library(assoc)).
:- use_module(library(dialect/hprolog)).
%% SWI end }}}
% imports and operators {{{
:- use_module(pairlist).
:- use_module(a_star).
:- use_module(listmap).
:- use_module(clean_code).
:- use_module(builtins).
:- use_module(find).
:- use_module(binomialheap).
:- use_module(guard_entailment).
:- use_module(chr_compiler_options).
:- use_module(chr_compiler_utility).
:- use_module(chr_compiler_errors).
:- include(chr_op).
:- op(1150, fx, chr_type).
:- op(1150, fx, chr_declaration).
:- op(1130, xfx, --->).
:- op(980, fx, (+)).
:- op(980, fx, (-)).
:- op(980, fx, (?)).
:- op(1150, fx, constraints).
:- op(1150, fx, chr_constraint).
% }}}
:- chr_option(debug,off).
:- chr_option(optimize,full).
:- chr_option(check_guard_bindings,off).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Type Declarations {{{
:- chr_type list(T) ---> [] ; [T|list(T)].
:- chr_type list == list(any).
:- chr_type mode ---> (+) ; (-) ; (?).
:- chr_type maybe(T) ---> yes(T) ; no.
:- chr_type constraint ---> any / any.
:- chr_type module_name == any.
:- chr_type pragma_rule ---> pragma(rule,idspair,list(pragma_type),maybe(rule_name),rule_nb).
:- chr_type rule ---> rule(list(any),list(any),goal,goal).
:- chr_type idspair ---> ids(list(id),list(id)).
:- chr_type pragma_type ---> passive(id)
; mpassive(list(id))
; already_in_heads
; already_in_heads(id)
; no_history
; history(history_name,list(id)).
:- chr_type history_name== any.
:- chr_type rule_name == any.
:- chr_type rule_nb == natural.
:- chr_type id == natural.
:- chr_type occurrence == int.
:- chr_type goal == any.
:- chr_type store_type ---> default
; multi_store(list(store_type))
; multi_hash(list(list(int)))
; multi_inthash(list(list(int)))
; global_singleton
; global_ground
% EXPERIMENTAL STORES
; atomic_constants(list(int),list(any),coverage)
; ground_constants(list(int),list(any),coverage)
; var_assoc_store(int,list(int))
; identifier_store(int)
; type_indexed_identifier_store(int,any).
:- chr_type coverage ---> complete ; incomplete.
% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%------------------------------------------------------------------------------%
:- chr_constraint chr_source_file/1.
:- chr_option(mode,chr_source_file(+)).
:- chr_option(type_declaration,chr_source_file(module_name)).
%------------------------------------------------------------------------------%
chr_source_file(_) \ chr_source_file(_) <=> true.
%------------------------------------------------------------------------------%
:- chr_constraint get_chr_source_file/1.
:- chr_option(mode,get_chr_source_file(-)).
:- chr_option(type_declaration,get_chr_source_file(module_name)).
%------------------------------------------------------------------------------%
chr_source_file(Mod) \ get_chr_source_file(Query)
<=> Query = Mod .
get_chr_source_file(Query)
<=> Query = user.
%------------------------------------------------------------------------------%
:- chr_constraint target_module/1.
:- chr_option(mode,target_module(+)).
:- chr_option(type_declaration,target_module(module_name)).
%------------------------------------------------------------------------------%
target_module(_) \ target_module(_) <=> true.
%------------------------------------------------------------------------------%
:- chr_constraint get_target_module/1.
:- chr_option(mode,get_target_module(-)).
:- chr_option(type_declaration,get_target_module(module_name)).
%------------------------------------------------------------------------------%
target_module(Mod) \ get_target_module(Query)
<=> Query = Mod .
get_target_module(Query)
<=> Query = user.
%------------------------------------------------------------------------------%
:- chr_constraint line_number/2.
:- chr_option(mode,line_number(+,+)).
:- chr_option(type_declaration,line_number(rule_nb,int)).
%------------------------------------------------------------------------------%
line_number(RuleNb,LineNb) \ line_number(RuleNb,LineNumber) <=> true.
%------------------------------------------------------------------------------%
:- chr_constraint get_line_number/2.
:- chr_option(mode,get_line_number(+,-)).
:- chr_option(type_declaration,get_line_number(rule_nb,int)).
%------------------------------------------------------------------------------%
line_number(RuleNb,LineNb) \ get_line_number(RuleNb,Q) <=> Q = LineNb.
get_line_number(RuleNb,Q) <=> Q = 0. % no line number available
:- chr_constraint indexed_argument/2. % argument instantiation may enable applicability of rule
:- chr_option(mode,indexed_argument(+,+)).
:- chr_option(type_declaration,indexed_argument(constraint,int)).
:- chr_constraint is_indexed_argument/2.
:- chr_option(mode,is_indexed_argument(+,+)).
:- chr_option(type_declaration,is_indexed_argument(constraint,int)).
:- chr_constraint constraint_mode/2.
:- chr_option(mode,constraint_mode(+,+)).
:- chr_option(type_declaration,constraint_mode(constraint,list(mode))).
:- chr_constraint get_constraint_mode/2.
:- chr_option(mode,get_constraint_mode(+,-)).
:- chr_option(type_declaration,get_constraint_mode(constraint,list(mode))).
:- chr_constraint may_trigger/1.
:- chr_option(mode,may_trigger(+)).
:- chr_option(type_declaration,may_trigger(constraint)).
:- chr_constraint only_ground_indexed_arguments/1.
:- chr_option(mode,only_ground_indexed_arguments(+)).
:- chr_option(type_declaration,only_ground_indexed_arguments(constraint)).
:- chr_constraint none_suspended_on_variables/0.
:- chr_constraint are_none_suspended_on_variables/0.
:- chr_constraint store_type/2.
:- chr_option(mode,store_type(+,+)).
:- chr_option(type_declaration,store_type(constraint,store_type)).
:- chr_constraint get_store_type/2.
:- chr_option(mode,get_store_type(+,?)).
:- chr_option(type_declaration,get_store_type(constraint,store_type)).
:- chr_constraint update_store_type/2.
:- chr_option(mode,update_store_type(+,+)).
:- chr_option(type_declaration,update_store_type(constraint,store_type)).
:- chr_constraint actual_store_types/2.
:- chr_option(mode,actual_store_types(+,+)).
:- chr_option(type_declaration,actual_store_types(constraint,list(store_type))).
:- chr_constraint assumed_store_type/2.
:- chr_option(mode,assumed_store_type(+,+)).
:- chr_option(type_declaration,assumed_store_type(constraint,store_type)).
:- chr_constraint validate_store_type_assumption/1.
:- chr_option(mode,validate_store_type_assumption(+)).
:- chr_option(type_declaration,validate_store_type_assumption(constraint)).
:- chr_constraint rule_count/1.
:- chr_option(mode,rule_count(+)).
:- chr_option(type_declaration,rule_count(natural)).
:- chr_constraint inc_rule_count/1.
:- chr_option(mode,inc_rule_count(-)).
:- chr_option(type_declaration,inc_rule_count(natural)).
rule_count(_) \ rule_count(_)
<=> true.
rule_count(C), inc_rule_count(NC)
<=> NC is C + 1, rule_count(NC).
inc_rule_count(NC)
<=> NC = 1, rule_count(NC).
:- chr_constraint passive/2.
:- chr_option(mode,passive(+,+)).
:- chr_option(type_declaration,passive(rule_nb,id)).
:- chr_constraint is_passive/2.
:- chr_option(mode,is_passive(+,+)).
:- chr_option(type_declaration,is_passive(rule_nb,id)).
:- chr_constraint any_passive_head/1.
:- chr_option(mode,any_passive_head(+)).
:- chr_constraint new_occurrence/4.
:- chr_option(mode,new_occurrence(+,+,+,+)).
:- chr_constraint occurrence/5.
:- chr_option(mode,occurrence(+,+,+,+,+)).
:- chr_type occurrence_type ---> simplification ; propagation.
:- chr_option(type_declaration,occurrence(constraint,occurrence,rule_nb,id,occurrence_type)).
:- chr_constraint get_occurrence/4.
:- chr_option(mode,get_occurrence(+,+,-,-)).
:- chr_constraint get_occurrence/5.
:- chr_option(mode,get_occurrence(+,+,-,-,-)).
:- chr_constraint get_occurrence_from_id/4.
:- chr_option(mode,get_occurrence_from_id(+,-,+,+)).
:- chr_constraint max_occurrence/2.
:- chr_option(mode,max_occurrence(+,+)).
:- chr_constraint get_max_occurrence/2.
:- chr_option(mode,get_max_occurrence(+,-)).
:- chr_constraint allocation_occurrence/2.
:- chr_option(mode,allocation_occurrence(+,+)).
:- chr_constraint get_allocation_occurrence/2.
:- chr_option(mode,get_allocation_occurrence(+,-)).
:- chr_constraint rule/2.
:- chr_option(mode,rule(+,+)).
:- chr_option(type_declaration,rule(rule_nb,pragma_rule)).
:- chr_constraint get_rule/2.
:- chr_option(mode,get_rule(+,-)).
:- chr_option(type_declaration,get_rule(int,pragma_rule)).
:- chr_constraint least_occurrence/2.
:- chr_option(mode,least_occurrence(+,+)).
:- chr_option(type_declaration,least_occurrence(any,list)).
:- chr_constraint is_least_occurrence/1.
:- chr_option(mode,is_least_occurrence(+)).
indexed_argument(FA,I) \ indexed_argument(FA,I) <=> true.
indexed_argument(FA,I) \ is_indexed_argument(FA,I) <=> true.
is_indexed_argument(_,_) <=> fail.
%%% C O N S T R A I N T M O D E %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
constraint_mode(FA,_) \ constraint_mode(FA,_) <=> true.
constraint_mode(FA,Mode) \ get_constraint_mode(FA,Q) <=>
Q = Mode.
get_constraint_mode(FA,Q) <=>
FA = _ / N,
replicate(N,(?),Q).
%%% M A Y T R I G G E R %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
may_trigger(FA) <=> \+ has_active_occurrence(FA) | fail.
constraint_mode(FA,Mode), indexed_argument(FA,I) \ may_trigger(FA) <=>
nth1(I,Mode,M),
M \== (+) |
is_stored(FA).
may_trigger(FA) <=> chr_pp_flag(debugable,on). % in debug mode, we assume everything can be triggered
constraint_mode(FA,Mode), indexed_argument(FA,I) \ only_ground_indexed_arguments(FA)
<=>
nth1(I,Mode,M),
M \== (+)
|
fail.
only_ground_indexed_arguments(_) <=>
true.
none_suspended_on_variables \ none_suspended_on_variables <=> true.
none_suspended_on_variables \ are_none_suspended_on_variables <=> true.
are_none_suspended_on_variables <=> fail.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% STORE TYPES
%
% The functionality for inspecting and deciding on the different types of constraint
% store / indexes for constraints.
store_type(FA,StoreType)
==> chr_pp_flag(verbose,on)
|
format('The indexes for ~w are:\n',[FA]),
format_storetype(StoreType).
% chr_info(verbose,'Storetype of ~w is ~w.\n',[FA,StoreType]).
format_storetype(multi_store(StoreTypes)) :- !,
maplist(format_storetype,StoreTypes).
format_storetype(atomic_constants(Index,Constants,_)) :-
format('\t* a trie index on the argument(s) ~w for the ground terms ~w\n',[Index,Constants]).
format_storetype(ground_constants(Index,Constants,_)) :-
format('\t* a trie index on the argument(s) ~w for the ground terms ~w\n',[Index,Constants]).
format_storetype(StoreType) :-
format('\t* ~w\n',[StoreType]).
% 1. Inspection
% ~~~~~~~~~~~~~
%
%
get_store_type_normal @
store_type(FA,Store) \ get_store_type(FA,Query)
<=> Query = Store.
get_store_type_assumed @
assumed_store_type(FA,Store) \ get_store_type(FA,Query)
<=> Query = Store.
get_store_type_default @
get_store_type(_,Query)
<=> Query = default.
% 2. Store type registration
% ~~~~~~~~~~~~~~~~~~~~~~~~~~
actual_store_types(C,STs) \ update_store_type(C,ST)
<=> memberchk(ST,STs) | true.
update_store_type(C,ST), actual_store_types(C,STs)
<=>
actual_store_types(C,[ST|STs]).
update_store_type(C,ST)
<=>
actual_store_types(C,[ST]).
% 3. Final decision on store types
% ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
validate_store_type_assumption(C) \ actual_store_types(C,STs), actual_atomic_multi_hash_keys(C,Index,Keys)
<=>
true % chr_pp_flag(experiment,on)
|
selectchk(multi_hash([Index]),STs,STs0),
Index = [IndexPos],
( get_constraint_arg_type(C,IndexPos,Type),
enumerated_atomic_type(Type,Atoms) ->
/* use the type constants rather than the collected keys */
Constants = Atoms,
Completeness = complete
;
Constants = Keys,
Completeness = incomplete
),
actual_store_types(C,[atomic_constants(Index,Constants,Completeness)|STs0]).
validate_store_type_assumption(C) \ actual_store_types(C,STs), actual_ground_multi_hash_keys(C,Index,Constants0)
<=>
true % chr_pp_flag(experiment,on)
|
( Index = [IndexPos],
get_constraint_arg_type(C,IndexPos,Type),
Type = chr_enum(Constants)
->
Completeness = complete
;
Constants = Constants0,
Completeness = incomplete
),
selectchk(multi_hash([Index]),STs,STs0),
actual_store_types(C,[ground_constants(Index,Constants,Completeness)|STs0]).
get_constraint_arg_type(C,Pos,Type) :-
get_constraint_type(C,Types),
nth1(Pos,Types,Type0),
unalias_type(Type0,Type).
validate_store_type_assumption(C) \ actual_store_types(C,STs)
<=>
% chr_pp_flag(experiment,on),
memberchk(multi_hash([[Index]]),STs),
get_constraint_type(C,Types),
nth1(Index,Types,Type),
enumerated_atomic_type(Type,Atoms)
|
selectchk(multi_hash([[Index]]),STs,STs0),
actual_store_types(C,[atomic_constants([Index],Atoms,complete)|STs0]).
validate_store_type_assumption(C) \ actual_store_types(C,STs)
<=>
memberchk(multi_hash([[Index]]),STs),
get_constraint_arg_type(C,Index,Type),
Type = chr_enum(Constants)
|
selectchk(multi_hash([[Index]]),STs,STs0),
actual_store_types(C,[ground_constants([Index],Constants,complete)|STs0]).
validate_store_type_assumption(C), actual_store_types(C,STs), assumed_store_type(C,_) % automatic assumption
<=>
( /* chr_pp_flag(experiment,on), */ maplist(partial_store,STs) ->
Stores = [global_ground|STs]
;
Stores = STs
),
store_type(C,multi_store(Stores)).
validate_store_type_assumption(C), actual_store_types(C,STs), store_type(C,_) % user assumption
<=>
store_type(C,multi_store(STs)).
validate_store_type_assumption(C), assumed_store_type(C,_) % no lookups on constraint in debug mode
<=>
chr_pp_flag(debugable,on)
|
store_type(C,default).
validate_store_type_assumption(C), assumed_store_type(C,_) % no lookups on constraint
<=> store_type(C,global_ground).
validate_store_type_assumption(C)
<=> true.
partial_store(ground_constants(_,_,incomplete)).
partial_store(atomic_constants(_,_,incomplete)).
%%% P A S S I V E %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
passive(R,ID) \ passive(R,ID) <=> true.
passive(RuleNb,ID) \ is_passive(RuleNb,ID) <=> true.
is_passive(_,_) <=> fail.
passive(RuleNb,_) \ any_passive_head(RuleNb)
<=> true.
any_passive_head(_)
<=> fail.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
max_occurrence(C,N) \ max_occurrence(C,M)
<=> N >= M | true.
max_occurrence(C,MO), new_occurrence(C,RuleNb,ID,Type) <=>
NO is MO + 1,
occurrence(C,NO,RuleNb,ID,Type),
max_occurrence(C,NO).
new_occurrence(C,RuleNb,ID,_) <=>
chr_error(internal,'new_occurrence: missing max_occurrence for ~w in rule ~w\n',[C,RuleNb]).
max_occurrence(C,MON) \ get_max_occurrence(C,Q)
<=> Q = MON.
get_max_occurrence(C,Q)
<=> chr_error(internal,'get_max_occurrence: missing max occurrence for ~w\n',[C]).
occurrence(C,ON,Rule,ID,_) \ get_occurrence(C,ON,QRule,QID)
<=> Rule = QRule, ID = QID.
get_occurrence(C,O,_,_)
<=> chr_error(internal,'get_occurrence: missing occurrence ~w:~w\n',[C,O]).
occurrence(C,ON,Rule,ID,OccType) \ get_occurrence(C,ON,QRule,QID,QOccType)
<=> Rule = QRule, ID = QID, OccType = QOccType.
get_occurrence(C,O,_,_,_)
<=> chr_error(internal,'get_occurrence: missing occurrence ~w:~w\n',[C,O]).
occurrence(C,ON,Rule,ID,_) \ get_occurrence_from_id(QC,QON,Rule,ID)
<=> QC = C, QON = ON.
get_occurrence_from_id(C,O,_,_)
<=> chr_error(internal,'get_occurrence_from_id: missing occurrence ~w:~w\n',[]).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Late allocation
late_allocation_analysis(Cs) :-
( chr_pp_flag(late_allocation,on) ->
maplist(late_allocation, Cs)
;
true
).
late_allocation(C) :- late_allocation(C,0).
late_allocation(C,O) :- allocation_occurrence(C,O), !.
late_allocation(C,O) :- NO is O + 1, late_allocation(C,NO).
% A L L O C C A T I O N O C C U R R E N C E %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
allocation_occurrence(C,0) ==> stored_in_guard_before_next_kept_occurrence(C,0).
rule(RuleNb,Rule), occurrence(C,O,RuleNb,Id,Type), allocation_occurrence(C,O) ==>
\+ is_passive(RuleNb,Id),
Type == propagation,
( stored_in_guard_before_next_kept_occurrence(C,O) ->
true
; Rule = pragma(rule([_|_],_,_,_),_,_,_,_) -> % simpagation rule
is_observed(C,O)
; is_least_occurrence(RuleNb) -> % propagation rule
is_observed(C,O)
;
true
).
stored_in_guard_before_next_kept_occurrence(C,O) :-
chr_pp_flag(store_in_guards, on),
NO is O + 1,
stored_in_guard_lookahead(C,NO).
:- chr_constraint stored_in_guard_lookahead/2.
:- chr_option(mode, stored_in_guard_lookahead(+,+)).
occurrence(C,O,RuleNb,Id,_), passive(RuleNb,Id) \ stored_in_guard_lookahead(C,O) <=>
NO is O + 1, stored_in_guard_lookahead(C,NO).
occurrence(C,O,RuleNb,Id,Type) \ stored_in_guard_lookahead(C,O) <=>
Type == simplification,
( is_stored_in_guard(C,RuleNb) ->
true
;
NO is O + 1, stored_in_guard_lookahead(C,NO)
).
stored_in_guard_lookahead(_,_) <=> fail.
rule(RuleNb,Rule), occurrence(C,O,RuleNb,ID,_), allocation_occurrence(C,AO)
\ least_occurrence(RuleNb,[ID|IDs])
<=> AO >= O, \+ may_trigger(C) |
least_occurrence(RuleNb,IDs).
rule(RuleNb,Rule), passive(RuleNb,ID)
\ least_occurrence(RuleNb,[ID|IDs])
<=> least_occurrence(RuleNb,IDs).
rule(RuleNb,Rule)
==> Rule = pragma(rule([],_,_,_),ids([],IDs),_,_,_) |
least_occurrence(RuleNb,IDs).
least_occurrence(RuleNb,[]) \ is_least_occurrence(RuleNb)
<=> true.
is_least_occurrence(_)
<=> fail.
allocation_occurrence(C,O) \ get_allocation_occurrence(C,Q)
<=> Q = O.
get_allocation_occurrence(_,Q)
<=> chr_pp_flag(late_allocation,off), Q=0.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
rule(RuleNb,Rule) \ get_rule(RuleNb,Q)
<=> Q = Rule.
get_rule(_,_)
<=> fail.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% C O N S T R A I N T I N D E X %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Default store constraint index assignment.
:- chr_constraint constraint_index/2. % constraint_index(F/A,DefaultStoreAndAttachedIndex)
:- chr_option(mode,constraint_index(+,+)).
:- chr_option(type_declaration,constraint_index(constraint,int)).
:- chr_constraint get_constraint_index/2.
:- chr_option(mode,get_constraint_index(+,-)).
:- chr_option(type_declaration,get_constraint_index(constraint,int)).
:- chr_constraint get_indexed_constraint/2.
:- chr_option(mode,get_indexed_constraint(+,-)).
:- chr_option(type_declaration,get_indexed_constraint(int,constraint)).
:- chr_constraint max_constraint_index/1. % max_constraint_index(MaxDefaultStoreAndAttachedIndex)
:- chr_option(mode,max_constraint_index(+)).
:- chr_option(type_declaration,max_constraint_index(int)).
:- chr_constraint get_max_constraint_index/1.
:- chr_option(mode,get_max_constraint_index(-)).
:- chr_option(type_declaration,get_max_constraint_index(int)).
constraint_index(C,Index) \ get_constraint_index(C,Query)
<=> Query = Index.
get_constraint_index(C,Query)
<=> fail.
constraint_index(C,Index) \ get_indexed_constraint(Index,Q)
<=> Q = C.
get_indexed_constraint(Index,Q)
<=> fail.
max_constraint_index(Index) \ get_max_constraint_index(Query)
<=> Query = Index.
get_max_constraint_index(Query)
<=> Query = 0.
set_constraint_indices(Constraints) :-
set_constraint_indices(Constraints,1).
set_constraint_indices([],M) :-
N is M - 1,
max_constraint_index(N).
set_constraint_indices([C|Cs],N) :-
( ( chr_pp_flag(debugable, on) ; \+ only_ground_indexed_arguments(C), is_stored(C) ; is_stored(C), get_store_type(C,default)
; get_store_type(C,var_assoc_store(_,_))) ->
constraint_index(C,N),
M is N + 1,
set_constraint_indices(Cs,M)
;
set_constraint_indices(Cs,N)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Identifier Indexes
:- chr_constraint identifier_size/1.
:- chr_option(mode,identifier_size(+)).
:- chr_option(type_declaration,identifier_size(natural)).
identifier_size(_) \ identifier_size(_)
<=>
true.
:- chr_constraint get_identifier_size/1.
:- chr_option(mode,get_identifier_size(-)).
:- chr_option(type_declaration,get_identifier_size(natural)).
identifier_size(Size) \ get_identifier_size(Q)
<=>
Q = Size.
get_identifier_size(Q)
<=>
Q = 1.
:- chr_constraint identifier_index/3.
:- chr_option(mode,identifier_index(+,+,+)).
:- chr_option(type_declaration,identifier_index(constraint,natural,natural)).
identifier_index(C,I,_) \ identifier_index(C,I,_)
<=>
true.
:- chr_constraint get_identifier_index/3.
:- chr_option(mode,get_identifier_index(+,+,-)).
:- chr_option(type_declaration,get_identifier_index(constraint,natural,natural)).
identifier_index(C,I,II) \ get_identifier_index(C,I,Q)
<=>
Q = II.
identifier_size(Size), get_identifier_index(C,I,Q)
<=>
NSize is Size + 1,
identifier_index(C,I,NSize),
identifier_size(NSize),
Q = NSize.
get_identifier_index(C,I,Q)
<=>
identifier_index(C,I,2),
identifier_size(2),
Q = 2.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Type Indexed Identifier Indexes
:- chr_constraint type_indexed_identifier_size/2.
:- chr_option(mode,type_indexed_identifier_size(+,+)).
:- chr_option(type_declaration,type_indexed_identifier_size(any,natural)).
type_indexed_identifier_size(IndexType,_) \ type_indexed_identifier_size(IndexType,_)
<=>
true.
:- chr_constraint get_type_indexed_identifier_size/2.
:- chr_option(mode,get_type_indexed_identifier_size(+,-)).
:- chr_option(type_declaration,get_type_indexed_identifier_size(any,natural)).
type_indexed_identifier_size(IndexType,Size) \ get_type_indexed_identifier_size(IndexType,Q)
<=>
Q = Size.
get_type_indexed_identifier_size(IndexType,Q)
<=>
Q = 1.
:- chr_constraint type_indexed_identifier_index/4.
:- chr_option(mode,type_indexed_identifier_index(+,+,+,+)).
:- chr_option(type_declaration,type_indexed_identifier_index(any,constraint,natural,natural)).
type_indexed_identifier_index(_,C,I,_) \ type_indexed_identifier_index(_,C,I,_)
<=>
true.
:- chr_constraint get_type_indexed_identifier_index/4.
:- chr_option(mode,get_type_indexed_identifier_index(+,+,+,-)).
:- chr_option(type_declaration,get_type_indexed_identifier_index(any,constraint,natural,natural)).
type_indexed_identifier_index(IndexType,C,I,II) \ get_type_indexed_identifier_index(IndexType,C,I,Q)
<=>
Q = II.
type_indexed_identifier_size(IndexType,Size), get_type_indexed_identifier_index(IndexType,C,I,Q)
<=>
NSize is Size + 1,
type_indexed_identifier_index(IndexType,C,I,NSize),
type_indexed_identifier_size(IndexType,NSize),
Q = NSize.
get_type_indexed_identifier_index(IndexType,C,I,Q)
<=>
type_indexed_identifier_index(IndexType,C,I,2),
type_indexed_identifier_size(IndexType,2),
Q = 2.
type_indexed_identifier_structure(IndexType,Structure) :-
type_indexed_identifier_name(IndexType,type_indexed_identifier_struct,Functor),
get_type_indexed_identifier_size(IndexType,Arity),
functor(Structure,Functor,Arity).
type_indexed_identifier_name(IndexType,Prefix,Name) :-
( atom(IndexType) ->
IndexTypeName = IndexType
;
term_to_atom(IndexType,IndexTypeName)
),
atom_concat_list([Prefix,'_',IndexTypeName],Name).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Translation
chr_translate(Declarations,NewDeclarations) :-
chr_translate_line_info(Declarations,'bootstrap',NewDeclarations).
chr_translate_line_info(Declarations0,File,NewDeclarations) :-
chr_banner,
restart_after_flattening(Declarations0,Declarations),
init_chr_pp_flags,
chr_source_file(File),
/* sort out the interesting stuff from the input */
partition_clauses(Declarations,Constraints0,Rules0,OtherClauses),
chr_compiler_options:sanity_check,
dump_code(Declarations),
check_declared_constraints(Constraints0),
generate_show_constraint(Constraints0,Constraints,Rules0,Rules1),
add_constraints(Constraints),
add_rules(Rules1),
generate_never_stored_rules(Constraints,NewRules),
add_rules(NewRules),
append(Rules1,NewRules,Rules),
chr_analysis(Rules,Constraints,Declarations),
time('constraint code generation',chr_translate:constraints_code(Constraints,ConstraintClauses)),
time('validate store assumptions',chr_translate:validate_store_type_assumptions(Constraints)),
phase_end(validate_store_type_assumptions),
used_states_known,
time('store code generation',chr_translate:store_management_preds(Constraints,StoreClauses)), % depends on actual code used
insert_declarations(OtherClauses, Clauses0),
chr_module_declaration(CHRModuleDeclaration),
append([StoreClauses,ConstraintClauses,CHRModuleDeclaration,[end_of_file]],StuffyGeneratedClauses),
clean_clauses(StuffyGeneratedClauses,GeneratedClauses),
append([Clauses0,GeneratedClauses], NewDeclarations),
dump_code(NewDeclarations),
!. /* cut choicepoint of restart_after_flattening */
chr_analysis(Rules,Constraints,Declarations) :-
maplist(pragma_rule_to_ast_rule,Rules,AstRules),
check_rules(Rules,AstRules,Constraints),
time('type checking',chr_translate:static_type_check(Rules,AstRules)),
/* constants */
collect_constants(Rules,AstRules,Constraints,Declarations),
add_occurrences(Rules,AstRules),
time('functional dependency',chr_translate:functional_dependency_analysis(Rules)),
time('set semantics',chr_translate:set_semantics_rules(Rules)),
time('symmetry analysis',chr_translate:symmetry_analysis(Rules)),
time('guard simplification',chr_translate:guard_simplification),
time('late storage',chr_translate:storage_analysis(Constraints)),
time('observation',chr_translate:observation_analysis(Constraints)),
time('ai observation',chr_translate:ai_observation_analysis(Constraints)),
time('late allocation',chr_translate:late_allocation_analysis(Constraints)),
partial_wake_analysis,
time('assume constraint stores',chr_translate:assume_constraint_stores(Constraints)),
time('default constraint indices',chr_translate:set_constraint_indices(Constraints)),
time('check storedness assertions',chr_translate:check_storedness_assertions(Constraints)),
time('continuation analysis',chr_translate:continuation_analysis(Constraints)).
store_management_preds(Constraints,Clauses) :-
generate_attach_detach_a_constraint_all(Constraints,AttachAConstraintClauses),
generate_attr_unify_hook(AttrUnifyHookClauses),
generate_attach_increment(AttachIncrementClauses),
generate_extra_clauses(Constraints,ExtraClauses),
generate_insert_delete_constraints(Constraints,DeleteClauses),
generate_attach_code(Constraints,StoreClauses),
generate_counter_code(CounterClauses),
generate_dynamic_type_check_clauses(TypeCheckClauses),
append([AttachAConstraintClauses
,AttachIncrementClauses
,AttrUnifyHookClauses
,ExtraClauses
,DeleteClauses
,StoreClauses
,CounterClauses
,TypeCheckClauses
]
,Clauses).
insert_declarations(Clauses0, Clauses) :-
findall((:- use_module(chr(Module))),(auxiliary_module(Module), is_used_auxiliary_module(Module)),Decls),
append(Clauses0, [(:- use_module(chr(chr_runtime)))|Decls], Clauses).
auxiliary_module(chr_hashtable_store).
auxiliary_module(chr_integertable_store).
auxiliary_module(chr_assoc_store).
generate_counter_code(Clauses) :-
( chr_pp_flag(store_counter,on) ->
Clauses = [
('$counter_init'(N1) :- nb_setval(N1,0)) ,
('$counter'(N2,X1) :- nb_getval(N2,X1)),
('$counter_inc'(N) :- nb_getval(N,X), Y is X + 1, nb_setval(N,Y)),
(:- '$counter_init'('$insert_counter')),
(:- '$counter_init'('$delete_counter')),
('$insert_counter_inc' :- '$counter_inc'('$insert_counter')),
('$delete_counter_inc' :- '$counter_inc'('$delete_counter')),
( counter_stats(I,D) :- '$counter'('$insert_counter',I),'$counter'('$delete_counter',D))
]
;
Clauses = []
).
% for systems with multifile declaration
chr_module_declaration(CHRModuleDeclaration) :-
get_target_module(Mod),
( Mod \== chr_translate, chr_pp_flag(toplevel_show_store,on) ->
CHRModuleDeclaration = [
(:- multifile chr:'$chr_module'/1),
chr:'$chr_module'(Mod)
]
;
CHRModuleDeclaration = []
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Partitioning of clauses into constraint declarations, chr rules and other
%% clauses
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% partition_clauses(+Clauses,-ConstraintDeclarations,-Rules,-OtherClauses) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
partition_clauses([],[],[],[]).
partition_clauses([Clause|Clauses],ConstraintDeclarations,Rules,OtherClauses) :-
( parse_rule(Clause,Rule) ->
ConstraintDeclarations = RestConstraintDeclarations,
Rules = [Rule|RestRules],
OtherClauses = RestOtherClauses
; is_declaration(Clause,ConstraintDeclaration) ->
append(ConstraintDeclaration,RestConstraintDeclarations,ConstraintDeclarations),
Rules = RestRules,
OtherClauses = RestOtherClauses
; is_module_declaration(Clause,Mod) ->
target_module(Mod),
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = [Clause|RestOtherClauses]
; is_type_definition(Clause) ->
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; is_chr_declaration(Clause) ->
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; Clause = (handler _) ->
chr_warning(deprecated(Clause),'Backward compatibility: ignoring handler/1 declaration.\n',[]),
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; Clause = (rules _) ->
chr_warning(deprecated(Clause),'Backward compatibility: ignoring rules/1 declaration.\n',[]),
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; Clause = option(OptionName,OptionValue) ->
chr_warning(deprecated(Clause),'Instead use `:-chr_option(~w,~w).\'\n',[OptionName,OptionValue]),
handle_option(OptionName,OptionValue),
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; Clause = (:-chr_option(OptionName,OptionValue)) ->
handle_option(OptionName,OptionValue),
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = RestOtherClauses
; Clause = ('$chr_compiled_with_version'(_)) ->
ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = ['$chr_compiled_with_version'(3)|RestOtherClauses]
; ConstraintDeclarations = RestConstraintDeclarations,
Rules = RestRules,
OtherClauses = [Clause|RestOtherClauses]
),
partition_clauses(Clauses,RestConstraintDeclarations,RestRules,RestOtherClauses).
'$chr_compiled_with_version'(2).
is_declaration(D, Constraints) :- %% constraint declaration
( D = (:- Decl), Decl =.. [F,Cs], F == (chr_constraint) ->
conj2list(Cs,Constraints0)
;
( D = (:- Decl) ->
Decl =.. [constraints,Cs]
;
D =.. [constraints,Cs]
),
conj2list(Cs,Constraints0),
chr_warning(deprecated(D),'Instead use :- chr_constraint ~w.\n',[Cs])
),
extract_type_mode(Constraints0,Constraints).
extract_type_mode([],[]).
extract_type_mode([F/A|R],[F/A|R2]) :- !,extract_type_mode(R,R2).
extract_type_mode([C0|R],[ConstraintSymbol|R2]) :-
( C0 = C # Annotation ->
functor(C,F,A),
extract_annotation(Annotation,F/A)
;
C0 = C,
functor(C,F,A)
),
ConstraintSymbol = F/A,
C =.. [_|Args],
extract_types_and_modes(Args,ArgTypes,ArgModes),
assert_constraint_type(ConstraintSymbol,ArgTypes),
constraint_mode(ConstraintSymbol,ArgModes),
extract_type_mode(R,R2).
extract_annotation(stored,Symbol) :-
stored_assertion(Symbol).
extract_annotation(default(Goal),Symbol) :-
never_stored_default(Symbol,Goal).
extract_types_and_modes([],[],[]).
extract_types_and_modes([X|R],[T|R2],[M|R3]) :-
extract_type_and_mode(X,T,M),
extract_types_and_modes(R,R2,R3).
extract_type_and_mode(+(T),T,(+)) :- !.
extract_type_and_mode(?(T),T,(?)) :- !.
extract_type_and_mode(-(T),T,(-)) :- !.
extract_type_and_mode((+),any,(+)) :- !.
extract_type_and_mode((?),any,(?)) :- !.
extract_type_and_mode((-),any,(-)) :- !.
extract_type_and_mode(Illegal,_,_) :-
chr_error(syntax(Illegal),'Illegal mode/type declaration.\n\tCorrect syntax is +type, -type or ?type\n\tor +, - or ?.\n',[]).
is_chr_declaration(Declaration) :-
Declaration = (:- chr_declaration Decl),
( Decl = (Pattern ---> Information) ->
background_info(Pattern,Information)
; Decl = Information ->
background_info([Information])
).
is_type_definition(Declaration) :-
is_type_definition(Declaration,Result),
assert_type_definition(Result).
assert_type_definition(typedef(Name,DefList)) :- type_definition(Name,DefList).
assert_type_definition(alias(Alias,Name)) :- type_alias(Alias,Name).
is_type_definition(Declaration,Result) :-
( Declaration = (:- TDef) ->
true
;
Declaration = TDef
),
TDef =.. [chr_type,TypeDef],
( TypeDef = (Name ---> Def) ->
tdisj2list(Def,DefList),
Result = typedef(Name,DefList)
; TypeDef = (Alias == Name) ->
Result = alias(Alias,Name)
;
Result = typedef(TypeDef,[]),
chr_warning(syntax,'Empty type definition `~w\'.\nAre you sure you want to declare a phantom type?\n',[Declaration])
).
%% tdisj2list(+Goal,-ListOfGoals) is det.
%
% no removal of fails, e.g. :- type bool ---> true ; fail.
tdisj2list(Conj,L) :-
tdisj2list(Conj,L,[]).
tdisj2list(Conj,L,T) :-
Conj = (G1;G2), !,
tdisj2list(G1,L,T1),
tdisj2list(G2,T1,T).
tdisj2list(G,[G | T],T).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% parse_rule(+term,-pragma_rule) is semidet.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
parse_rule(RI,R) :- %% name @ rule
RI = (Name @ RI2), !,
rule(RI2,yes(Name),R).
parse_rule(RI,R) :-
rule(RI,no,R).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% parse_rule(+term,-pragma_rule) is semidet.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
rule(RI,Name,R) :-
RI = (RI2 pragma P), !, %% pragmas
( var(P) ->
Ps = [_] % intercept variable
;
conj2list(P,Ps)
),
inc_rule_count(RuleCount),
R = pragma(R1,IDs,Ps,Name,RuleCount),
is_rule(RI2,R1,IDs,R).
rule(RI,Name,R) :-
inc_rule_count(RuleCount),
R = pragma(R1,IDs,[],Name,RuleCount),
is_rule(RI,R1,IDs,R).
is_rule(RI,R,IDs,RC) :- %% propagation rule
RI = (H ==> B), !,
conj2list(H,Head2i),
get_ids(Head2i,IDs2,Head2,RC),
IDs = ids([],IDs2),
( B = (G | RB) ->
R = rule([],Head2,G,RB)
;
R = rule([],Head2,true,B)
).
is_rule(RI,R,IDs,RC) :- %% simplification/simpagation rule
RI = (H <=> B), !,
( B = (G | RB) ->
Guard = G,
Body = RB
; Guard = true,
Body = B
),
( H = (H1 \ H2) ->
conj2list(H1,Head2i),
conj2list(H2,Head1i),
get_ids(Head2i,IDs2,Head2,0,N,RC),
get_ids(Head1i,IDs1,Head1,N,_,RC),
IDs = ids(IDs1,IDs2)
; conj2list(H,Head1i),
Head2 = [],
get_ids(Head1i,IDs1,Head1,RC),
IDs = ids(IDs1,[])
),
R = rule(Head1,Head2,Guard,Body).
get_ids(Cs,IDs,NCs,RC) :-
get_ids(Cs,IDs,NCs,0,_,RC).
get_ids([],[],[],N,N,_).
get_ids([C|Cs],[N|IDs],[NC|NCs],N,NN,RC) :-
( C = (NC # N1) ->
( var(N1) ->
N1 = N
;
check_direct_pragma(N1,N,RC)
)
;
NC = C
),
M is N + 1,
get_ids(Cs,IDs,NCs, M,NN,RC).
check_direct_pragma(passive,Id,PragmaRule) :- !,
PragmaRule = pragma(_,_,_,_,RuleNb),
passive(RuleNb,Id).
check_direct_pragma(Abbrev,Id,PragmaRule) :-
( direct_pragma(FullPragma),
atom_concat(Abbrev,Remainder,FullPragma) ->
chr_warning(problem_pragma(Abbrev,PragmaRule),'completed `~w\' to `~w\'\n',[Abbrev,FullPragma])
;
chr_warning(unsupported_pragma(Abbrev,PragmaRule),'',[])
).
direct_pragma(passive).
is_module_declaration((:- module(Mod)),Mod).
is_module_declaration((:- module(Mod,_)),Mod).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Add constraints
add_constraints([]).
add_constraints([C|Cs]) :-
max_occurrence(C,0),
C = _/A,
length(Mode,A),
set_elems(Mode,?),
constraint_mode(C,Mode),
add_constraints(Cs).
% Add rules
add_rules([]).
add_rules([Rule|Rules]) :-
Rule = pragma(_,_,_,_,RuleNb),
rule(RuleNb,Rule),
add_rules(Rules).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Some input verification:
check_declared_constraints(Constraints) :-
tree_set_empty(Acc),
check_declared_constraints(Constraints,Acc).
check_declared_constraints([],_).
check_declared_constraints([C|Cs],Acc) :-
( tree_set_memberchk(C,Acc) ->
chr_error(syntax(C),'Constraint multiply defined: ~w.\n\tRemove redundant declaration!\n',[C])
;
true
),
tree_set_add(Acc,C,NAcc),
check_declared_constraints(Cs,NAcc).
%% - all constraints in heads are declared constraints
%% - all passive pragmas refer to actual head constraints
check_rules(PragmaRules,AstRules,Decls) :-
maplist(check_rule(Decls),PragmaRules,AstRules).
check_rule(Decls,PragmaRule,AstRule) :-
PragmaRule = pragma(_Rule,_IDs,Pragmas,_Name,_N),
check_ast_rule_indexing(AstRule,PragmaRule),
% check_rule_indexing(PragmaRule),
check_ast_trivial_propagation_rule(AstRule,PragmaRule),
% check_trivial_propagation_rule(PragmaRule),
check_ast_head_constraints(AstRule,Decls,PragmaRule),
% Rule = rule(H1,H2,_,_),
% check_head_constraints(H1,Decls,PragmaRule),
% check_head_constraints(H2,Decls,PragmaRule),
check_pragmas(Pragmas,PragmaRule).
%-------------------------------------------------------------------------------
% Make all heads passive in trivial propagation rule
% ... ==> ... | true.
check_ast_trivial_propagation_rule(AstRule,PragmaRule) :-
AstRule = ast_rule(AstHead,_,_,AstBody,_),
( AstHead = propagation(_),
AstBody == [] ->
chr_warning(weird_program,'Ignoring propagation rule with empty body: ~@.\n\t\n',[format_rule(PragmaRule)]),
set_rule_passive(PragmaRule)
;
true
).
set_rule_passive(PragmaRule) :-
PragmaRule = pragma(_Rule,_IDs,_Pragmas,_Name,RuleNb),
set_all_passive(RuleNb).
check_trivial_propagation_rule(PragmaRule) :-
PragmaRule = pragma(Rule,IDs,Pragmas,Name,RuleNb),
( Rule = rule([],_,_,true) ->
chr_warning(weird_program,'Ignoring propagation rule with empty body: ~@.\n\t\n',[format_rule(PragmaRule)]),
set_all_passive(RuleNb)
;
true
).
%-------------------------------------------------------------------------------
check_ast_head_constraints(ast_rule(AstHead,_,_,_,_),Decls,PragmaRule) :-
check_ast_head_constraints_(AstHead,Decls,PragmaRule).
check_ast_head_constraints_(simplification(AstConstraints),Decls,PragmaRule) :-
maplist(check_ast_head_constraint(Decls,PragmaRule),AstConstraints).
check_ast_head_constraints_(propagation(AstConstraints),Decls,PragmaRule) :-
maplist(check_ast_head_constraint(Decls,PragmaRule),AstConstraints).
check_ast_head_constraints_(simpagation(AstConstraints1,AstConstraints2),Decls,PragmaRule) :-
maplist(check_ast_head_constraint(Decls,PragmaRule),AstConstraints1),
maplist(check_ast_head_constraint(Decls,PragmaRule),AstConstraints2).
check_ast_head_constraint(Decls,PragmaRule,chr_constraint(Symbol,_,Constraint)) :-
( memberchk(Symbol,Decls) ->
true
;
chr_error(syntax(Constraint),'Undeclared constraint ~w in head of ~@.\n\tConstraint should be one of ~w.\n', [F/A,format_rule(PragmaRule),Decls])
).
check_head_constraints([],_,_).
check_head_constraints([Constr|Rest],Decls,PragmaRule) :-
functor(Constr,F,A),
( memberchk(F/A,Decls) ->
check_head_constraints(Rest,Decls,PragmaRule)
;
chr_error(syntax(Constr),'Undeclared constraint ~w in head of ~@.\n\tConstraint should be one of ~w.\n', [F/A,format_rule(PragmaRule),Decls])
).
%-------------------------------------------------------------------------------
check_pragmas([],_).
check_pragmas([Pragma|Pragmas],PragmaRule) :-
check_pragma(Pragma,PragmaRule),
check_pragmas(Pragmas,PragmaRule).
check_pragma(Pragma,PragmaRule) :-
var(Pragma), !,
chr_error(syntax(Pragma),'Invalid pragma ~w in ~@.\n\tPragma should not be a variable!\n',[Pragma,format_rule(PragmaRule)]).
check_pragma(passive(ID), PragmaRule) :-
!,
PragmaRule = pragma(_,ids(IDs1,IDs2),_,_,RuleNb),
( memberchk_eq(ID,IDs1) ->
true
; memberchk_eq(ID,IDs2) ->
true
;
chr_error(syntax(ID),'Invalid identifier ~w in pragma passive in ~@.\n', [ID,format_rule(PragmaRule)])
),
passive(RuleNb,ID).
check_pragma(mpassive(IDs), PragmaRule) :-
!,
PragmaRule = pragma(_,_,_,_,RuleNb),
chr_warning(experimental,'Experimental pragma ~w. Use with care!\n',[mpassive(IDs)]),
maplist(passive(RuleNb),IDs).
check_pragma(Pragma, PragmaRule) :-
Pragma = already_in_heads,
!,
chr_warning(unsupported_pragma(Pragma,PragmaRule),'Termination and correctness may be affected.\n',[]).
check_pragma(Pragma, PragmaRule) :-
Pragma = already_in_head(_),
!,
chr_warning(unsupported_pragma(Pragma,PragmaRule),'Termination and correctness may be affected.\n',[]).
check_pragma(Pragma, PragmaRule) :-
Pragma = no_history,
!,
chr_warning(experimental,'Experimental pragma no_history. Use with care!\n',[]),
PragmaRule = pragma(_,_,_,_,N),
no_history(N).
check_pragma(Pragma, PragmaRule) :-
Pragma = history(HistoryName,IDs),
!,
PragmaRule = pragma(_,ids(IDs1,IDs2),_,_,RuleNb),
chr_warning(experimental,'Experimental pragma ~w. Use with care!\n',[Pragma]),
( IDs1 \== [] ->
chr_error(syntax(Pragma),'Pragma history only implemented for propagation rules.\n',[])
; \+ atom(HistoryName) ->
chr_error(syntax(Pragma),'Illegal argument for pragma history: ~w is not an atom (rule number ~w).\n',[HistoryName,RuleNb])
; \+ is_set(IDs) ->
chr_error(syntax(Pragma),'Illegal argument for pragma history: ~w is not a set (rule number ~w).\n',[IDs,RuleNb])
; check_history_pragma_ids(IDs,IDs1,IDs2) ->
history(RuleNb,HistoryName,IDs)
;
chr_error(syntax(Pragma),'Invalid identifier(s) in pragma ~w of rule number ~w.\n',[Pragma,RuleNb])
).
check_pragma(Pragma,PragmaRule) :-
Pragma = line_number(LineNumber),
!,
PragmaRule = pragma(_,_,_,_,RuleNb),
line_number(RuleNb,LineNumber).
check_history_pragma_ids([], _, _).
check_history_pragma_ids([ID|IDs],IDs1,IDs2) :-
( memberchk_eq(ID,IDs2) ; memberchk_eq(ID,IDs1) ),
check_history_pragma_ids(IDs,IDs1,IDs2).
check_pragma(Pragma,PragmaRule) :-
chr_error(syntax(Pragma),'Unknown pragma ~w in ~@.\n', [Pragma,format_rule(PragmaRule)]).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% no_history(+RuleNb) is det.
:- chr_constraint no_history/1.
:- chr_option(mode,no_history(+)).
:- chr_option(type_declaration,no_history(int)).
%% has_no_history(+RuleNb) is semidet.
:- chr_constraint has_no_history/1.
:- chr_option(mode,has_no_history(+)).
:- chr_option(type_declaration,has_no_history(int)).
no_history(RuleNb) \ has_no_history(RuleNb) <=> true.
has_no_history(_) <=> fail.
:- chr_constraint history/3.
:- chr_option(mode,history(+,+,+)).
:- chr_option(type_declaration,history(any,any,list)).
:- chr_constraint named_history/3.
history(RuleNb,_,_), history(RuleNb,_,_) ==>
chr_error(syntax,'Only one pragma history allowed per rule (rule number ~w)\n',[RuleNb]). %'
history(RuleNb1,Name,IDs1), history(RuleNb2,Name,IDs2) ==>
length(IDs1,L1), length(IDs2,L2),
( L1 \== L2 ->
chr_error(syntax,'The history named ~w does not always range over an equal amount of occurrences.\n',[Name])
;
test_named_history_id_pairs(RuleNb1,IDs1,RuleNb2,IDs2)
).
test_named_history_id_pairs(_, [], _, []).
test_named_history_id_pairs(RuleNb1, [ID1|IDs1], RuleNb2, [ID2|IDs2]) :-
test_named_history_id_pair(RuleNb1,ID1,RuleNb2,ID2),
test_named_history_id_pairs(RuleNb1,IDs1,RuleNb2,IDs2).
:- chr_constraint test_named_history_id_pair/4.
:- chr_option(mode,test_named_history_id_pair(+,+,+,+)).
occurrence(C,_,RuleNb1,ID1,_), occurrence(C,_,RuleNb2,ID2,_)
\ test_named_history_id_pair(RuleNb1,ID1,RuleNb2,ID2) <=> true.
test_named_history_id_pair(RuleNb1,ID1,RuleNb2,ID2) <=>
chr_error(syntax,'Occurrences of shared history in rules number ~w and ~w do not correspond\n', [RuleNb2,RuleNb1]).
history(RuleNb,Name,IDs) \ named_history(RuleNb,QName,QIDs) <=> QName = Name, QIDs = IDs.
named_history(_,_,_) <=> fail.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
format_rule(PragmaRule) :-
PragmaRule = pragma(_,_,_,MaybeName,RuleNumber),
( MaybeName = yes(Name) ->
write('rule '), write(Name)
;
write('rule number '), write(RuleNumber)
),
get_line_number(RuleNumber,LineNumber),
write(' (line '),
write(LineNumber),
write(')').
check_ast_rule_indexing(AstRule,PragmaRule) :-
AstRule = ast_rule(AstHead,AstGuard,_,_,_),
tree_set_empty(EmptyVarSet),
ast_head_variables(AstHead,EmptyVarSet,VarSet),
ast_remove_anti_monotonic_guards(AstGuard,VarSet,MonotonicAstGuard),
ast_term_list_variables(MonotonicAstGuard,EmptyVarSet,GuardVarSet),
check_ast_head_indexing(AstHead,GuardVarSet),
% check_indexing(H1,NG-H2),
% check_indexing(H2,NG-H1),
% EXPERIMENT
( chr_pp_flag(term_indexing,on) ->
PragmaRule = pragma(Rule,_,_,_,_),
Rule = rule(H1,H2,G,_),
term_variables(H1-H2,HeadVars),
remove_anti_monotonic_guards(G,HeadVars,NG),
term_variables(NG,GuardVariables),
append(H1,H2,Heads),
check_specs_indexing(Heads,GuardVariables,Specs)
;
true
).
check_ast_head_indexing(simplification(H1),VarSet) :-
check_ast_indexing(H1,VarSet).
check_ast_head_indexing(propagation(H2),VarSet) :-
check_ast_indexing(H2,VarSet).
check_ast_head_indexing(simpagation(H1,H2),VarSet) :-
ast_constraint_list_variables(H2,VarSet,VarSet1),
check_ast_indexing(H1,VarSet1),
ast_constraint_list_variables(H1,VarSet,VarSet2),
check_ast_indexing(H2,VarSet2).
check_rule_indexing(PragmaRule) :-
PragmaRule = pragma(Rule,_,_,_,_),
Rule = rule(H1,H2,G,_),
term_variables(H1-H2,HeadVars),
remove_anti_monotonic_guards(G,HeadVars,NG),
check_indexing(H1,NG-H2),
check_indexing(H2,NG-H1),
% EXPERIMENT
( chr_pp_flag(term_indexing,on) ->
term_variables(NG,GuardVariables),
append(H1,H2,Heads),
check_specs_indexing(Heads,GuardVariables,Specs)
;
true
).
:- chr_constraint indexing_spec/2.
:- chr_option(mode,indexing_spec(+,+)).
:- chr_constraint get_indexing_spec/2.
:- chr_option(mode,get_indexing_spec(+,-)).
indexing_spec(FA,Spec) \ get_indexing_spec(FA,R) <=> R = Spec.
get_indexing_spec(_,Spec) <=> Spec = [].
indexing_spec(FA,Specs1), indexing_spec(FA,Specs2)
<=>
append(Specs1,Specs2,Specs),
indexing_spec(FA,Specs).
remove_anti_monotonic_guards(G,Vars,NG) :-
conj2list(G,GL),
remove_anti_monotonic_guard_list(GL,Vars,NGL),
list2conj(NGL,NG).
remove_anti_monotonic_guard_list([],_,[]).
remove_anti_monotonic_guard_list([G|Gs],Vars,NGs) :-
( G = var(X), memberchk_eq(X,Vars) ->
NGs = RGs
;
NGs = [G|RGs]
),
remove_anti_monotonic_guard_list(Gs,Vars,RGs).
ast_remove_anti_monotonic_guards([],_,[]).
ast_remove_anti_monotonic_guards([G|Gs],VarSet,NGs) :-
( G = compound(var,1,[X],_),
ast_var_memberchk(X,VarSet) ->
NGs = RGs
;
NGs = [G|RGs]
),
ast_remove_anti_monotonic_guards(Gs,VarSet,RGs).
%-------------------------------------------------------------------------------
check_ast_indexing([],_).
check_ast_indexing([Head|Heads],VarSet) :-
Head = chr_constraint(Symbol,Args,_Constraint),
ast_constraint_list_variables(Heads,VarSet,VarSet1),
check_ast_indexing(Args,1,Symbol,VarSet1),
ast_constraint_variables(Head,VarSet,NVarSet),
check_ast_indexing(Heads,NVarSet).
check_ast_indexing([],_,_,_).
check_ast_indexing([Arg|Args],I,Symbol,VarSet) :-
( is_indexed_argument(Symbol,I) ->
true
; ast_nonvar(Arg) ->
indexed_argument(Symbol,I)
; % ast_var(Arg) ->
ast_term_list_variables(Args,VarSet,VarSet1),
( ast_var_memberchk(Arg,VarSet1) ->
indexed_argument(Symbol,I)
;
true
)
),
J is I + 1,
ast_term_variables(Arg,VarSet,NVarSet),
check_ast_indexing(Args,J,Symbol,NVarSet).
% check_indexing(list(chr_constraint),variables)
check_indexing([],_).
check_indexing([Head|Heads],Other) :-
functor(Head,F,A),
Head =.. [_|Args],
term_variables(Heads-Other,OtherVars),
check_indexing(Args,1,F/A,OtherVars),
check_indexing(Heads,[Head|Other]).
check_indexing([],_,_,_).
check_indexing([Arg|Args],I,FA,OtherVars) :-
( is_indexed_argument(FA,I) ->
true
; nonvar(Arg) ->
indexed_argument(FA,I)
; % var(Arg) ->
term_variables(Args,ArgsVars),
append(ArgsVars,OtherVars,RestVars),
( memberchk_eq(Arg,RestVars) ->
indexed_argument(FA,I)
;
true
)
),
J is I + 1,
term_variables(Arg,NVars),
append(NVars,OtherVars,NOtherVars),
check_indexing(Args,J,FA,NOtherVars).
%-------------------------------------------------------------------------------
check_specs_indexing([],_,[]).
check_specs_indexing([Head|Heads],Variables,Specs) :-
Specs = [Spec|RSpecs],
term_variables(Heads,OtherVariables,Variables),
check_spec_indexing(Head,OtherVariables,Spec),
term_variables(Head,NVariables,Variables),
check_specs_indexing(Heads,NVariables,RSpecs).
check_spec_indexing(Head,OtherVariables,Spec) :-
functor(Head,F,A),
Spec = spec(F,A,ArgSpecs),
Head =.. [_|Args],
check_args_spec_indexing(Args,1,OtherVariables,ArgSpecs),
indexing_spec(F/A,[ArgSpecs]).
check_args_spec_indexing([],_,_,[]).
check_args_spec_indexing([Arg|Args],I,OtherVariables,ArgSpecs) :-
term_variables(Args,Variables,OtherVariables),
( check_arg_spec_indexing(Arg,I,Variables,ArgSpec) ->
ArgSpecs = [ArgSpec|RArgSpecs]
;
ArgSpecs = RArgSpecs
),
J is I + 1,
term_variables(Arg,NOtherVariables,OtherVariables),
check_args_spec_indexing(Args,J,NOtherVariables,RArgSpecs).
check_arg_spec_indexing(Arg,I,Variables,ArgSpec) :-
( var(Arg) ->
memberchk_eq(Arg,Variables),
ArgSpec = specinfo(I,any,[])
;
functor(Arg,F,A),
ArgSpec = specinfo(I,F/A,[ArgSpecs]),
Arg =.. [_|Args],
check_args_spec_indexing(Args,1,Variables,ArgSpecs)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Occurrences
add_occurrences(PragmaRules,AstRules) :-
maplist(add_rule_occurrences,PragmaRules,AstRules).
add_rule_occurrences(PragmaRule,AstRule) :-
PragmaRule = pragma(_,IDs,_,_,Nb),
AstRule = ast_rule(AstHead,_,_,_,_),
add_head_occurrences(AstHead,IDs,Nb).
add_head_occurrences(simplification(H1),ids(IDs1,_),Nb) :-
maplist(add_constraint_occurrence(Nb,simplification),H1,IDs1).
add_head_occurrences(propagation(H2),ids(_,IDs2),Nb) :-
maplist(add_constraint_occurrence(Nb,propagation),H2,IDs2).
add_head_occurrences(simpagation(H1,H2),ids(IDs1,IDs2),Nb) :-
maplist(add_constraint_occurrence(Nb,simplification),H1,IDs1),
maplist(add_constraint_occurrence(Nb,propagation),H2,IDs2).
add_constraint_occurrence(Nb,OccType,Constraint,ID) :-
Constraint = chr_constraint(Symbol,_,_),
new_occurrence(Symbol,Nb,ID,OccType).
% add_occurrences([],[]).
% add_occurrences([Rule|Rules],[]) :-
% Rule = pragma(rule(H1,H2,_,_),ids(IDs1,IDs2),_,_,Nb),
% add_occurrences(H1,IDs1,simplification,Nb),
% add_occurrences(H2,IDs2,propagation,Nb),
% add_occurrences(Rules).
%
% add_occurrences([],[],_,_).
% add_occurrences([H|Hs],[ID|IDs],Type,RuleNb) :-
% functor(H,F,A),
% FA = F/A,
% new_occurrence(FA,RuleNb,ID,Type),
% add_occurrences(Hs,IDs,Type,RuleNb).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Observation Analysis
%
% CLASSIFICATION
%
%
%
%
%
%
:- chr_constraint observation_analysis/1.
:- chr_option(mode, observation_analysis(+)).
observation_analysis(Cs), rule(RuleNb,PragmaRule) # Id ==>
PragmaRule = pragma(rule(_,_,Guard,Body),_,_,_,_),
( chr_pp_flag(store_in_guards, on) ->
observation_analysis(RuleNb, Guard, guard, Cs)
;
true
),
observation_analysis(RuleNb, Body, body, Cs)
pragma passive(Id).
observation_analysis(_) <=> true.
observation_analysis(RuleNb, Term, GB, Cs) :-
( all_spawned(RuleNb,GB) ->
true
; var(Term) ->
spawns_all(RuleNb,GB)
; Term = true ->
true
; Term = fail ->
true
; Term = '!' ->
true
; Term = (T1,T2) ->
observation_analysis(RuleNb,T1,GB,Cs),
observation_analysis(RuleNb,T2,GB,Cs)
; Term = (T1;T2) ->
observation_analysis(RuleNb,T1,GB,Cs),
observation_analysis(RuleNb,T2,GB,Cs)
; Term = (T1->T2) ->
observation_analysis(RuleNb,T1,GB,Cs),
observation_analysis(RuleNb,T2,GB,Cs)
; Term = (\+ T) ->
observation_analysis(RuleNb,T,GB,Cs)
; functor(Term,F,A), memberchk(F/A,Cs) ->
spawns(RuleNb,GB,F/A)
; Term = (_ = _) ->
spawns_all_triggers(RuleNb,GB)
; Term = (_ is _) ->
spawns_all_triggers(RuleNb,GB)
; builtin_binds_b(Term,Vars) ->
( Vars == [] ->
true
;
spawns_all_triggers(RuleNb,GB)
)
;
spawns_all(RuleNb,GB)
).
:- chr_constraint spawns/3.
:- chr_option(mode, spawns(+,+,+)).
:- chr_type spawns_type ---> guard ; body.
:- chr_option(type_declaration,spawns(any,spawns_type,any)).
:- chr_constraint spawns_all/2, spawns_all_triggers/2.
:- chr_option(mode, spawns_all(+,+)).
:- chr_option(type_declaration,spawns_all(any,spawns_type)).
:- chr_option(mode, spawns_all_triggers(+,+)).
:- chr_option(type_declaration,spawns_all_triggers(any,spawns_type)).
spawns_all(RuleNb,GB) \ spawns_all(RuleNb,GB) <=> true.
spawns_all(RuleNb,guard) \ spawns_all(RuleNb,body) <=> true.
spawns_all_triggers(RuleNb,GB) \ spawns_all_triggers(RuleNb,GB) <=> true.
spawns_all_triggers(RuleNb,guard) \ spawns_all_triggers(RuleNb,body) <=> true.
spawns(RuleNb,GB,C) \ spawns(RuleNb,GB,C) <=> true.
spawns(RuleNb,guard,C) \ spawns(RuleNb,body,C) <=> true.
spawns_all(RuleNb,GB) \ spawns(RuleNb,GB,_) <=> true.
spawns_all(RuleNb,guard) \ spawns(RuleNb,body,_) <=> true.
spawns_all(RuleNb,GB) \ spawns_all_triggers(RuleNb,GB) <=> true.
spawns_all(RuleNb,guard) \ spawns_all_triggers(RuleNb,body) <=> true.
spawns_all_triggers(RuleNb,GB) \ spawns(RuleNb,GB,C) <=> may_trigger(C) | true.
spawns_all_triggers(RuleNb,guard) \ spawns(RuleNb,body,C) <=> may_trigger(C) | true.
spawns_all(RuleNb2,_), occurrence(C1,_,RuleNb2,O,_)#Id
\
spawns(RuleNb1,GB,C1)
<=>
\+ is_passive(RuleNb2,O)
|
spawns_all(RuleNb1,GB)
pragma
passive(Id).
occurrence(C1,_,RuleNb2,O,_)#Id, spawns_all(RuleNb2,_)
==>
\+(\+ spawns_all_triggers_implies_spawns_all), % in the hope it schedules this guard early...
\+ is_passive(RuleNb2,O), may_trigger(C1)
|
spawns_all_triggers_implies_spawns_all
pragma
passive(Id).
:- chr_constraint spawns_all_triggers_implies_spawns_all/0.
spawns_all_triggers_implies_spawns_all, spawns_all_triggers_implies_spawns_all <=> fail.
spawns_all_triggers_implies_spawns_all \
spawns_all_triggers(RuleNb,GB) <=> spawns_all(RuleNb,GB).
spawns_all_triggers(RuleNb2,_), occurrence(C1,_,RuleNb2,O,_)#Id
\
spawns(RuleNb1,GB,C1)
<=>
may_trigger(C1),
\+ is_passive(RuleNb2,O)
|
spawns_all_triggers(RuleNb1,GB)
pragma
passive(Id).
spawns_all_triggers(RuleNb2,_), occurrence(C1,_,RuleNb2,O,_)#Id,
spawns(RuleNb1,GB,C1)
==>
\+ may_trigger(C1),
\+ is_passive(RuleNb2,O)
|
spawns_all_triggers(RuleNb1,GB)
pragma
passive(Id).
% a bit dangerous this rule: could start propagating too much too soon?
spawns(RuleNb2,_,C2), occurrence(C1,_,RuleNb2,O,_)#Id,
spawns(RuleNb1,GB,C1)
==>
RuleNb1 \== RuleNb2, C1 \== C2,
\+ is_passive(RuleNb2,O)
|
spawns(RuleNb1,GB,C2)
pragma
passive(Id).
spawns(RuleNb2,_,C2), occurrence(C1,_,RuleNb2,O,_)#Id,
spawns_all_triggers(RuleNb1,GB)
==>
\+ is_passive(RuleNb2,O), may_trigger(C1), \+ may_trigger(C2)
|
spawns(RuleNb1,GB,C2)
pragma
passive(Id).
:- chr_constraint all_spawned/2.
:- chr_option(mode, all_spawned(+,+)).
spawns_all(RuleNb,guard) \ all_spawned(RuleNb,_) <=> true.
spawns_all(RuleNb,GB) \ all_spawned(RuleNb,GB) <=> true.
all_spawned(RuleNb,GB) <=> fail.
% Overview of the supported queries:
% is_observed(+functor/artiy, +occurrence_number, +(guard;body))
% only succeeds if the occurrence is observed by the
% guard resp. body (depending on the last argument) of its rule
% is_observed(+functor/artiy, +occurrence_number, -)
% succeeds if the occurrence is observed by either the guard or
% the body of its rule
% NOTE: the last argument is NOT bound by this query
%
% do_is_observed(+functor/artiy,+rule_number,+(guard;body))
% succeeds if the given constraint is observed by the given
% guard resp. body
% do_is_observed(+functor/artiy,+rule_number)
% succeeds if the given constraint is observed by the given
% rule (either its guard or its body)
is_observed(C,O) :-
is_observed(C,O,_),
ai_is_observed(C,O).
is_stored_in_guard(C,RuleNb) :-
chr_pp_flag(store_in_guards, on),
do_is_observed(C,RuleNb,guard).
:- chr_constraint is_observed/3.
:- chr_option(mode, is_observed(+,+,+)).
occurrence(C,O,RuleNb,_,_) \ is_observed(C,O,GB) <=> do_is_observed(C,RuleNb,GB).
is_observed(_,_,_) <=> fail. % this will not happen in practice
:- chr_constraint do_is_observed/3.
:- chr_option(mode, do_is_observed(+,+,?)).
:- chr_constraint do_is_observed/2.
:- chr_option(mode, do_is_observed(+,+)).
do_is_observed(C,RuleNb,GB) <=> var(GB) | do_is_observed(C,RuleNb).
% (1) spawns_all
% a constraint C is observed if the GB of the rule it occurs in spawns all,
% and some non-passive occurrence of some (possibly other) constraint
% exists in a rule (could be same rule) with at least one occurrence of C
spawns_all(RuleNb,GB),
occurrence(_,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb,GB)
<=>
\+ is_passive(RuleNb2,O)
|
true.
spawns_all(RuleNb,_),
occurrence(_,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb)
<=>
\+ is_passive(RuleNb2,O)
|
true.
% (2) spawns
% a constraint C is observed if the GB of the rule it occurs in spawns a
% constraint C2 that occurs non-passively in a rule (possibly the same rule)
% as an occurrence of C
spawns(RuleNb,GB,C2),
occurrence(C2,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb,GB)
<=>
\+ is_passive(RuleNb2,O)
|
true.
spawns(RuleNb,_,C2),
occurrence(C2,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb)
<=>
\+ is_passive(RuleNb2,O)
|
true.
% (3) spawns_all_triggers
% a constraint C is observed if the GB of the rule it occurs in spawns all triggers
% and some non-passive occurrence of some (possibly other) constraint that may trigger
% exists in a rule (could be same rule) with at least one occurrence of C
spawns_all_triggers(RuleNb,GB),
occurrence(C2,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb,GB)
<=>
\+ is_passive(RuleNb2,O), may_trigger(C2)
|
true.
spawns_all_triggers(RuleNb,_),
occurrence(C2,_,RuleNb2,O,_), occurrence(C,_,RuleNb2,_,_)
\
do_is_observed(C,RuleNb)
<=>
\+ is_passive(RuleNb2,O), may_trigger(C2)
|
true.
% (4) conservativeness
do_is_observed(_,_,_) <=> chr_pp_flag(observation_analysis,off).
do_is_observed(_,_) <=> chr_pp_flag(observation_analysis,off).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Generated predicates
%% attach_$CONSTRAINT
%% attach_increment
%% detach_$CONSTRAINT
%% attr_unify_hook
%% attach_$CONSTRAINT
generate_attach_detach_a_constraint_all([],[]).
generate_attach_detach_a_constraint_all([Constraint|Constraints],Clauses) :-
( ( chr_pp_flag(debugable,on) ; is_stored(Constraint), \+ only_ground_indexed_arguments(Constraint), \+ get_store_type(Constraint,var_assoc_store(_,_)) ) ->
generate_attach_a_constraint(Constraint,Clauses1),
generate_detach_a_constraint(Constraint,Clauses2)
;
Clauses1 = [],
Clauses2 = []
),
generate_attach_detach_a_constraint_all(Constraints,Clauses3),
append([Clauses1,Clauses2,Clauses3],Clauses).
generate_attach_a_constraint(Constraint,[Clause1,Clause2]) :-
generate_attach_a_constraint_nil(Constraint,Clause1),
generate_attach_a_constraint_cons(Constraint,Clause2).
attach_constraint_atom(FA,Vars,Susp,Atom) :-
make_name('attach_',FA,Name),
Atom =.. [Name,Vars,Susp].
generate_attach_a_constraint_nil(FA,Clause) :-
Clause = (Head :- true),
attach_constraint_atom(FA,[],_,Head).
generate_attach_a_constraint_cons(FA,Clause) :-
Clause = (Head :- Body),
attach_constraint_atom(FA,[Var|Vars],Susp,Head),
attach_constraint_atom(FA,Vars,Susp,RecursiveCall),
Body = ( AttachBody, Subscribe, RecursiveCall ),
get_max_constraint_index(N),
( N == 1 ->
generate_attach_body_1(FA,Var,Susp,AttachBody)
;
generate_attach_body_n(FA,Var,Susp,AttachBody)
),
% SWI-Prolog specific code
chr_pp_flag(solver_events,NMod),
( NMod \== none ->
Args = [[Var|_],Susp],
get_target_module(Mod),
use_auxiliary_predicate(run_suspensions),
Subscribe = clp_events:subscribe(Var,NMod,Mod,Mod:'$run_suspensions'([Susp]))
;
Subscribe = true
).
generate_attach_body_1(FA,Var,Susp,Body) :-
get_target_module(Mod),
Body =
( get_attr(Var, Mod, Susps) ->
put_attr(Var, Mod, [Susp|Susps])
;
put_attr(Var, Mod, [Susp])
).
generate_attach_body_n(F/A,Var,Susp,Body) :-
chr_pp_flag(experiment,off), !,
get_constraint_index(F/A,Position),
get_max_constraint_index(Total),
get_target_module(Mod),
add_attr(Total,Susp,Position,TAttr,AddGoal,NTAttr),
singleton_attr(Total,Susp,Position,NewAttr3),
Body =
( get_attr(Var,Mod,TAttr) ->
AddGoal,
put_attr(Var,Mod,NTAttr)
;
put_attr(Var,Mod,NewAttr3)
), !.
generate_attach_body_n(F/A,Var,Susp,Body) :-
chr_pp_flag(experiment,on), !,
get_constraint_index(F/A,Position),
or_pattern(Position,Pattern),
Position1 is Position + 1,
get_max_constraint_index(Total),
get_target_module(Mod),
singleton_attr(Total,Susp,Position,NewAttr3),
Body =
( get_attr(Var,Mod,TAttr) ->
arg(1,TAttr,BitVector),
arg(Position1,TAttr,Susps),
NBitVector is BitVector \/ Pattern,
setarg(1,TAttr,NBitVector),
setarg(Position1,TAttr,[Susp|Susps])
;
put_attr(Var,Mod,NewAttr3)
), !.
%% detach_$CONSTRAINT
generate_detach_a_constraint(Constraint,[Clause1,Clause2]) :-
generate_detach_a_constraint_nil(Constraint,Clause1),
generate_detach_a_constraint_cons(Constraint,Clause2).
detach_constraint_atom(FA,Vars,Susp,Atom) :-
make_name('detach_',FA,Name),
Atom =.. [Name,Vars,Susp].
generate_detach_a_constraint_nil(FA,Clause) :-
Clause = ( Head :- true),
detach_constraint_atom(FA,[],_,Head).
generate_detach_a_constraint_cons(FA,Clause) :-
Clause = (Head :- Body),
detach_constraint_atom(FA,[Var|Vars],Susp,Head),
detach_constraint_atom(FA,Vars,Susp,RecursiveCall),
Body = ( DetachBody, RecursiveCall ),
get_max_constraint_index(N),
( N == 1 ->
generate_detach_body_1(FA,Var,Susp,DetachBody)
;
generate_detach_body_n(FA,Var,Susp,DetachBody)
).
generate_detach_body_1(FA,Var,Susp,Body) :-
get_target_module(Mod),
Body =
( get_attr(Var,Mod,Susps) ->
'chr sbag_del_element'(Susps,Susp,NewSusps),
( NewSusps == [] ->
del_attr(Var,Mod)
;
put_attr(Var,Mod,NewSusps)
)
;
true
).
generate_detach_body_n(F/A,Var,Susp,Body) :-
get_constraint_index(F/A,Position),
get_max_constraint_index(Total),
rem_attr(Total,Var,Susp,Position,TAttr,RemGoal),
get_target_module(Mod),
Body =
( get_attr(Var,Mod,TAttr) ->
RemGoal
;
true
), !.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%-------------------------------------------------------------------------------
%% generate_indexed_variables_body(+ConstraintSymbol,+ArgList,-Body,-VarList) is det.
:- chr_constraint generate_indexed_variables_body/4.
:- chr_option(mode,generate_indexed_variables_body(+,?,+,?)).
:- chr_option(type_declaration,generate_indexed_variables_body(constraint,any,any,any)).
%-------------------------------------------------------------------------------
constraint_mode(F/A,ArgModes) \ generate_indexed_variables_body(F/A,Args,Body,Vars) <=>
get_indexing_spec(F/A,Specs),
( chr_pp_flag(term_indexing,on) ->
spectermvars(Specs,Args,F,A,Body,Vars)
;
get_constraint_type_det(F/A,ArgTypes),
create_indexed_variables_body(Args,ArgModes,ArgTypes,Vars,1,F/A,MaybeBody,N),
( MaybeBody == empty ->
Body = true,
Vars = []
; N == 0 ->
( Args = [Term] ->
true
;
Term =.. [term|Args]
),
Body = term_variables(Term,Vars)
;
MaybeBody = Body
)
).
generate_indexed_variables_body(FA,_,_,_) <=>
chr_error(internal,'generate_indexed_variables_body: missing mode info for ~w.\n',[FA]).
%===============================================================================
create_indexed_variables_body([],[],[],_,_,_,empty,0).
create_indexed_variables_body([V|Vs],[Mode|Modes],[Type|Types],Vars,I,FA,Body,N) :-
J is I + 1,
create_indexed_variables_body(Vs,Modes,Types,Tail,J,FA,RBody,M),
( Mode == (?),
is_indexed_argument(FA,I) ->
( atomic_type(Type) ->
Body =
(
( var(V) ->
Vars = [V|Tail]
;
Vars = Tail
),
Continuation
),
( RBody == empty ->
Continuation = true, Tail = []
;
Continuation = RBody
)
;
( RBody == empty ->
Body = term_variables(V,Vars)
;
Body = (term_variables(V,Vars,Tail),RBody)
)
),
N = M
; Mode == (-), is_indexed_argument(FA,I) ->
( RBody == empty ->
Body = (Vars = [V])
;
Body = (Vars = [V|Tail],RBody)
),
N is M + 1
;
Vars = Tail,
Body = RBody,
N is M + 1
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% EXPERIMENTAL
spectermvars(Specs,Args,F,A,Goal,Vars) :-
spectermvars(Args,1,Specs,F,A,Vars,[],Goal).
spectermvars([],B,_,_,A,L,L,true) :- B > A, !.
spectermvars([Arg|Args],I,Specs,F,A,L,T,Goal) :-
Goal = (ArgGoal,RGoal),
argspecs(Specs,I,TempArgSpecs,RSpecs),
merge_argspecs(TempArgSpecs,ArgSpecs),
arggoal(ArgSpecs,Arg,ArgGoal,L,L1),
J is I + 1,
spectermvars(Args,J,RSpecs,F,A,L1,T,RGoal).
argspecs([],_,[],[]).
argspecs([[]|Rest],I,ArgSpecs,RestSpecs) :-
argspecs(Rest,I,ArgSpecs,RestSpecs).
argspecs([[specinfo(J,Spec,Args)|Specs]|Rest],I,ArgSpecs,RestSpecs) :-
( I == J ->
ArgSpecs = [specinfo(J,Spec,Args)|RArgSpecs],
( Specs = [] ->
RRestSpecs = RestSpecs
;
RestSpecs = [Specs|RRestSpecs]
)
;
ArgSpecs = RArgSpecs,
RestSpecs = [[specinfo(J,Spec,Args)|Specs]|RRestSpecs]
),
argspecs(Rest,I,RArgSpecs,RRestSpecs).
merge_argspecs(In,Out) :-
sort(In,Sorted),
merge_argspecs_(Sorted,Out).
merge_argspecs_([],[]).
merge_argspecs_([X],R) :- !, R = [X].
merge_argspecs_([specinfo(I,F1,A1),specinfo(I,F2,A2)|Rest],R) :-
( (F1 == any ; F2 == any) ->
merge_argspecs_([specinfo(I,any,[])|Rest],R)
; F1 == F2 ->
append(A1,A2,A),
merge_argspecs_([specinfo(I,F1,A)|Rest],R)
;
R = [specinfo(I,F1,A1)|RR],
merge_argspecs_([specinfo(I,F2,A2)|Rest],RR)
).
arggoal(List,Arg,Goal,L,T) :-
( List == [] ->
L = T,
Goal = true
; List = [specinfo(_,any,_)] ->
Goal = term_variables(Arg,L,T)
;
Goal =
( var(Arg) ->
L = [Arg|T]
;
Cases
),
arggoal_cases(List,Arg,L,T,Cases)
).
arggoal_cases([],_,L,T,L=T).
arggoal_cases([specinfo(_,FA,ArgSpecs)|Rest],Arg,L,T,Cases) :-
( ArgSpecs == [] ->
Cases = RCases
; ArgSpecs == [[]] ->
Cases = RCases
; FA = F/A ->
Cases = (Case ; RCases),
functor(Term,F,A),
Term =.. [_|Args],
Case = (Arg = Term -> ArgsGoal),
spectermvars(Args,1,ArgSpecs,F,A,L,T,ArgsGoal)
),
arggoal_cases(Rest,Arg,L,T,RCases).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
generate_extra_clauses(Constraints,List) :-
generate_activate_clauses(Constraints,List,Tail0),
generate_remove_clauses(Constraints,Tail0,Tail1),
generate_allocate_clauses(Constraints,Tail1,Tail2),
generate_insert_constraint_internal_clauses(Constraints,Tail2,Tail3),
generate_novel_production(Tail3,Tail4),
generate_extend_history(Tail4,Tail5),
generate_run_suspensions_clauses(Constraints,Tail5,Tail6),
generate_empty_named_history_initialisations(Tail6,Tail7),
Tail7 = [].
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% remove_constraint_internal/[1/3]
generate_remove_clauses([],List,List).
generate_remove_clauses([C|Cs],List,Tail) :-
generate_remove_clause(C,List,List1),
generate_remove_clauses(Cs,List1,Tail).
remove_constraint_goal(Constraint,Susp,Agenda,DeleteNo,DeleteYes,Role,Goal) :-
uses_state(Constraint,removed),
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(remove_constraint_internal,Constraint),
Goal = ( DeleteGoal, ( Delete == yes -> DeleteYes ; DeleteNo) ),
remove_constraint_atom(Constraint,Susp,Agenda,Delete,DeleteGoal)
;
delay_phase_end(validate_store_type_assumptions,
generate_remove_body(Constraint,Susp,Agenda,DeleteNo,DeleteYes,Role,Goal)
)
).
remove_constraint_atom(Constraint,Susp,Agenda,Delete,Goal) :-
make_name('$remove_constraint_internal_',Constraint,Name),
( chr_pp_flag(debugable,off), ( only_ground_indexed_arguments(Constraint) ; get_store_type(Constraint,var_assoc_store(_,_)) ) ->
Goal =.. [Name, Susp,Delete]
;
Goal =.. [Name,Susp,Agenda,Delete]
).
generate_remove_clause(Constraint,List,Tail) :-
( is_used_auxiliary_predicate(remove_constraint_internal,Constraint) ->
List = [RemoveClause|Tail],
RemoveClause = (Head :- RemoveBody),
remove_constraint_atom(Constraint,Susp,Agenda,Delete,Head),
generate_remove_body(Constraint,Susp,Agenda,Delete = no,Delete = yes,active,RemoveBody)
;
List = Tail
).
generate_remove_body(Constraint,Susp,Agenda,DeleteNo,DeleteYes,Role,RemoveBody) :-
( chr_pp_flag(debugable,off), ( only_ground_indexed_arguments(Constraint) ; get_store_type(Constraint,var_assoc_store(_,_))) ->
( Role == active ->
get_update_suspension_field(Constraint,Susp,state,State,removed,GetState,GetStateValue0,UpdateState),
if_used_state(Constraint,not_stored_yet,GetStateValue0,true,GetStateValue),
if_used_state(Constraint,not_stored_yet,(State == not_stored_yet -> DeleteNo ; DeleteYes),DeleteYes,MaybeDelete)
; Role == partner ->
get_update_suspension_field(Constraint,Susp,state,State,removed,GetState,_,UpdateState),
GetStateValue = true,
MaybeDelete = DeleteYes
),
RemoveBody =
(
GetState,
GetStateValue,
UpdateState,
MaybeDelete
)
;
static_suspension_term(Constraint,Susp2),
get_static_suspension_term_field(arguments,Constraint,Susp2,Args),
generate_indexed_variables_body(Constraint,Args,IndexedVariablesBody,Agenda),
( chr_pp_flag(debugable,on) ->
Constraint = Functor / _,
get_static_suspension_term_field(functor,Constraint,Susp2,Functor)
;
true
),
( Role == active ->
get_update_static_suspension_field(Constraint,Susp,Susp2,state,State,removed,GetStateValue0,UpdateState),
if_used_state(Constraint,not_stored_yet,GetStateValue0,true,GetStateValue),
if_used_state(Constraint,not_stored_yet,(State == not_stored_yet -> Agenda = [], DeleteNo ; IndexedVariablesBody, DeleteYes),(IndexedVariablesBody,DeleteYes),MaybeDelete)
; Role == partner ->
get_update_static_suspension_field(Constraint,Susp,Susp2,state,State,removed,_,UpdateState),
GetStateValue = true,
MaybeDelete = (IndexedVariablesBody, DeleteYes)
),
RemoveBody =
(
Susp = Susp2,
GetStateValue,
UpdateState,
MaybeDelete
)
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% activate_constraint/4
generate_activate_clauses([],List,List).
generate_activate_clauses([C|Cs],List,Tail) :-
generate_activate_clause(C,List,List1),
generate_activate_clauses(Cs,List1,Tail).
activate_constraint_goal(Constraint,StoreAction,Vars,Susp,Generation,Goal) :-
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(activate_constraint,Constraint),
Goal = ( ActivateGoal , (Store == yes -> StoreAction ; true) ),
activate_constraint_atom(Constraint,Store,Vars,Susp,Generation,ActivateGoal)
;
delay_phase_end(validate_store_type_assumptions,
activate_constraint_body(Constraint,StoreAction,true,Vars,Susp,Generation,Goal)
)
).
activate_constraint_atom(Constraint,Store,Vars,Susp,Generation,Goal) :-
make_name('$activate_constraint_',Constraint,Name),
( chr_pp_flag(debugable,off), only_ground_indexed_arguments(Constraint) ->
Goal =.. [Name,Store, Susp]
; chr_pp_flag(debugable,off), may_trigger(Constraint), get_store_type(Constraint,var_assoc_store(_,_)) ->
Goal =.. [Name,Store, Susp, Generation]
; chr_pp_flag(debugable,off), may_trigger(Constraint), get_store_type(Constraint,var_assoc_store(_,_)) ->
Goal =.. [Name,Store, Vars, Susp, Generation]
;
Goal =.. [Name,Store, Vars, Susp]
).
generate_activate_clause(Constraint,List,Tail) :-
( is_used_auxiliary_predicate(activate_constraint,Constraint) ->
List = [Clause|Tail],
Clause = (Head :- Body),
activate_constraint_atom(Constraint,Store,Vars,Susp,Generation,Head),
activate_constraint_body(Constraint,Store = yes, Store = no,Vars,Susp,Generation,Body)
;
List = Tail
).
activate_constraint_body(Constraint,StoreYes,StoreNo,Vars,Susp,Generation,Body) :-
( chr_pp_flag(debugable,off), may_trigger(Constraint), uses_field(Constraint,generation) ->
get_update_suspension_field(Constraint,Susp,generation,Gen,Generation,GetGeneration,GetGenerationValue,UpdateGeneration),
GenerationHandling = (GetGeneration, GetGenerationValue, Generation is Gen+1, UpdateGeneration)
;
GenerationHandling = true
),
get_update_suspension_field(Constraint,Susp,state,State,active,GetState,GetStateValue0,UpdateState),
if_used_state(Constraint,not_stored_yet,GetStateValue0,true,GetStateValue),
( chr_pp_flag(debugable,off), ( only_ground_indexed_arguments(Constraint) ; get_store_type(Constraint,var_assoc_store(_,_))) ->
if_used_state(Constraint,not_stored_yet,( State == not_stored_yet -> StoreYes ; StoreNo ),StoreNo,StoreVarsGoal)
;
get_dynamic_suspension_term_field(arguments,Constraint,Susp,Arguments,ArgumentsGoal),
generate_indexed_variables_body(Constraint,Arguments,IndexedVariablesBody,Vars),
chr_none_locked(Vars,NoneLocked),
if_used_state(Constraint,not_stored_yet,
( State == not_stored_yet ->
ArgumentsGoal,
IndexedVariablesBody,
NoneLocked,
StoreYes
;
% Vars = [],
StoreNo
),
% (Vars = [],StoreNo),StoreVarsGoal)
StoreNo,StoreVarsGoal)
),
Body =
(
GetState,
GetStateValue,
UpdateState,
GenerationHandling,
StoreVarsGoal
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% allocate_constraint/4
generate_allocate_clauses([],List,List).
generate_allocate_clauses([C|Cs],List,Tail) :-
generate_allocate_clause(C,List,List1),
generate_allocate_clauses(Cs,List1,Tail).
allocate_constraint_goal(Constraint,Susp,Args,Goal) :-
uses_state(Constraint,not_stored_yet),
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(allocate_constraint,Constraint),
allocate_constraint_atom(Constraint,Susp,Args,Goal)
;
Goal = (Susp = Suspension, Goal0),
delay_phase_end(validate_store_type_assumptions,
allocate_constraint_body(Constraint,Suspension,Args,Goal0)
)
).
allocate_constraint_atom(Constraint, Susp, Args,Goal) :-
make_name('$allocate_constraint_',Constraint,Name),
Goal =.. [Name,Susp|Args].
generate_allocate_clause(Constraint,List,Tail) :-
( is_used_auxiliary_predicate(allocate_constraint,Constraint) ->
List = [Clause|Tail],
Clause = (Head :- Body),
Constraint = _/A,
length(Args,A),
allocate_constraint_atom(Constraint,Susp,Args,Head),
allocate_constraint_body(Constraint,Susp,Args,Body)
;
List = Tail
).
allocate_constraint_body(Constraint,Susp,Args,Body) :-
static_suspension_term(Constraint,Suspension),
get_static_suspension_term_field(arguments,Constraint,Suspension,Args),
( chr_pp_flag(debugable,on) ->
Constraint = Functor / _,
get_static_suspension_term_field(functor,Constraint,Suspension,Functor)
;
true
),
( chr_pp_flag(debugable,on) ->
( may_trigger(Constraint) ->
append(Args,[Susp],VarsSusp),
build_head(F,A,[0],VarsSusp, ContinuationGoal),
get_target_module(Mod),
Continuation = Mod : ContinuationGoal
;
Continuation = true
),
Init = (Susp = Suspension),
create_static_suspension_field(Constraint,Suspension,continuation,Continuation,CreateContinuation),
create_static_suspension_field(Constraint,Suspension,generation,0,CreateGeneration)
; may_trigger(Constraint), uses_field(Constraint,generation) ->
create_static_suspension_field(Constraint,Suspension,generation,0,CreateGeneration),
Susp = Suspension, Init = true, CreateContinuation = true
;
CreateGeneration = true, Susp = Suspension, Init = true, CreateContinuation = true
),
( uses_history(Constraint) ->
create_static_suspension_field(Constraint,Suspension,history,t,CreateHistory)
;
CreateHistory = true
),
create_static_suspension_field(Constraint,Suspension,state,not_stored_yet,CreateState),
( has_suspension_field(Constraint,id) ->
get_static_suspension_term_field(id,Constraint,Suspension,Id),
gen_id(Id,GenID)
;
GenID = true
),
Body =
(
Init,
CreateContinuation,
CreateGeneration,
CreateHistory,
CreateState,
GenID
).
gen_id(Id,'chr gen_id'(Id)).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% insert_constraint_internal
generate_insert_constraint_internal_clauses([],List,List).
generate_insert_constraint_internal_clauses([C|Cs],List,Tail) :-
generate_insert_constraint_internal_clause(C,List,List1),
generate_insert_constraint_internal_clauses(Cs,List1,Tail).
insert_constraint_internal_constraint_goal(Constraint, Vars, Suspension, Continuation, Args,Goal) :-
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(remove_constraint_internal,Constraint),
insert_constraint_internal_constraint_atom(Constraint,Vars,Suspension,Continuation,Args,Goal)
;
delay_phase_end(validate_store_type_assumptions,
generate_insert_constraint_internal_body(Constraint,Suspension,Continuation,Args,Vars,Goal)
)
).
insert_constraint_internal_constraint_atom(Constraint,Vars,Self,Closure,Args,Goal) :-
insert_constraint_internal_constraint_name(Constraint,Name),
( chr_pp_flag(debugable,on) ->
Goal =.. [Name, Vars, Self, Closure | Args]
; ( only_ground_indexed_arguments(Constraint) ; get_store_type(Constraint,var_assoc_store(_,_)))->
Goal =.. [Name,Self | Args]
;
Goal =.. [Name,Vars, Self | Args]
).
insert_constraint_internal_constraint_name(Constraint,Name) :-
make_name('$insert_constraint_internal_',Constraint,Name).
generate_insert_constraint_internal_clause(Constraint,List,Tail) :-
( is_used_auxiliary_predicate(insert_constraint_internal,Constraint) ->
List = [Clause|Tail],
Clause = (Head :- Body),
Constraint = _/A,
length(Args,A),
insert_constraint_internal_constraint_atom(Constraint, Vars, Suspension, Continuation,Args,Head),
generate_insert_constraint_internal_body(Constraint,Suspension,Continuation,Args,Vars,Body)
;
List = Tail
).
generate_insert_constraint_internal_body(Constraint,Susp,Continuation,Args,Vars,Body) :-
static_suspension_term(Constraint,Suspension),
create_static_suspension_field(Constraint,Suspension,state,active,CreateState),
( chr_pp_flag(debugable,on) ->
get_static_suspension_term_field(continuation,Constraint,Suspension,Continuation),
create_static_suspension_field(Constraint,Suspension,generation,0,CreateGeneration)
; may_trigger(Constraint), uses_field(Constraint,generation) ->
create_static_suspension_field(Constraint,Suspension,generation,0,CreateGeneration)
;
CreateGeneration = true
),
( chr_pp_flag(debugable,on) ->
Constraint = Functor / _,
get_static_suspension_term_field(functor,Constraint,Suspension,Functor)
;
true
),
( uses_history(Constraint) ->
create_static_suspension_field(Constraint,Suspension,history,t,CreateHistory)
;
CreateHistory = true
),
get_static_suspension_term_field(arguments,Constraint,Suspension,Args),
List = [Clause|Tail],
( chr_pp_flag(debugable,off), ( only_ground_indexed_arguments(Constraint) ; get_store_type(Constraint,var_assoc_store(_,_)))->
suspension_term_base_fields(Constraint,BaseFields),
( has_suspension_field(Constraint,id) ->
get_static_suspension_term_field(id,Constraint,Suspension,Id),
gen_id(Id,GenID)
;
GenID = true
),
Body =
(
Susp = Suspension,
CreateState,
CreateGeneration,
CreateHistory,
GenID
)
;
( has_suspension_field(Constraint,id) ->
get_static_suspension_term_field(id,Constraint,Suspension,Id),
gen_id(Id,GenID)
;
GenID = true
),
generate_indexed_variables_body(Constraint,Args,IndexedVariablesBody,Vars),
chr_none_locked(Vars,NoneLocked),
Body =
(
Susp = Suspension,
IndexedVariablesBody,
NoneLocked,
CreateState,
CreateGeneration,
CreateHistory,
GenID
)
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% novel_production/2
generate_novel_production(List,Tail) :-
( is_used_auxiliary_predicate(novel_production) ->
List = [Clause|Tail],
Clause =
(
'$novel_production'( Self, Tuple) :-
% arg( 3, Self, Ref), % ARGXXX
% 'chr get_mutable'( History, Ref),
arg( 3, Self, History), % ARGXXX
( hprolog:get_ds( Tuple, History, _) ->
fail
;
true
)
)
;
List = Tail
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% extend_history/2
generate_extend_history(List,Tail) :-
( is_used_auxiliary_predicate(extend_history) ->
List = [Clause|Tail],
Clause =
(
'$extend_history'( Self, Tuple) :-
% arg( 3, Self, Ref), % ARGXXX
% 'chr get_mutable'( History, Ref),
arg( 3, Self, History), % ARGXXX
hprolog:put_ds( Tuple, History, x, NewHistory),
setarg( 3, Self, NewHistory) % ARGXXX
)
;
List = Tail
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
%
:- chr_constraint
empty_named_history_initialisations/2,
generate_empty_named_history_initialisation/1,
find_empty_named_histories/0.
generate_empty_named_history_initialisations(List, Tail) :-
empty_named_history_initialisations(List, Tail),
find_empty_named_histories.
find_empty_named_histories, history(_, Name, []) ==>
generate_empty_named_history_initialisation(Name).
generate_empty_named_history_initialisation(Name) \
generate_empty_named_history_initialisation(Name) <=> true.
generate_empty_named_history_initialisation(Name) \
empty_named_history_initialisations(List, Tail) # Passive
<=>
empty_named_history_global_variable(Name, GlobalVariable),
List = [(:- nb_setval(GlobalVariable, 0))|Rest],
empty_named_history_initialisations(Rest, Tail)
pragma passive(Passive).
find_empty_named_histories \
generate_empty_named_history_initialisation(_) # Passive <=> true
pragma passive(Passive).
find_empty_named_histories,
empty_named_history_initialisations(List, Tail) # Passive <=> List = Tail
pragma passive(Passive).
find_empty_named_histories <=>
chr_error(internal, 'find_empty_named_histories was not removed', []).
empty_named_history_global_variable(Name, GlobalVariable) :-
atom_concat('chr empty named history ', Name, GlobalVariable).
empty_named_history_novel_production(Name, nb_getval(GlobalVariable, 0)) :-
empty_named_history_global_variable(Name, GlobalVariable).
empty_named_history_extend_history(Name, b_setval(GlobalVariable, 1)) :-
empty_named_history_global_variable(Name, GlobalVariable).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
% run_suspensions/2
generate_run_suspensions_clauses([],List,List).
generate_run_suspensions_clauses([C|Cs],List,Tail) :-
generate_run_suspensions_clause(C,List,List1),
generate_run_suspensions_clauses(Cs,List1,Tail).
run_suspensions_goal(Constraint,Suspensions,Goal) :-
make_name('$run_suspensions_',Constraint,Name),
Goal =.. [Name,Suspensions].
generate_run_suspensions_clause(Constraint,List,Tail) :-
( is_used_auxiliary_predicate(run_suspensions,Constraint) ->
List = [Clause1,Clause2|Tail],
run_suspensions_goal(Constraint,[],Clause1),
( chr_pp_flag(debugable,on) ->
run_suspensions_goal(Constraint,[Suspension|Suspensions],Clause2Head),
get_update_suspension_field(Constraint,Suspension,state,State,triggered,GetState,GetStateValue,UpdateState),
get_update_suspension_field(Constraint,Suspension,state,Post,active,GetPost,GetPostValue,UpdatePost),
get_update_suspension_field(Constraint,Suspension,generation,Gen,Generation,GetGeneration,GetGenerationValue,UpdateGeneration),
get_dynamic_suspension_term_field(continuation,Constraint,Suspension,Continuation,GetContinuation),
run_suspensions_goal(Constraint,Suspensions,Clause2Recursion),
Clause2 =
(
Clause2Head :-
GetState,
GetStateValue,
( State==active ->
UpdateState,
GetGeneration,
GetGenerationValue,
Generation is Gen+1,
UpdateGeneration,
GetContinuation,
(
'chr debug_event'(wake(Suspension)),
call(Continuation)
;
'chr debug_event'(fail(Suspension)), !,
fail
),
(
'chr debug_event'(exit(Suspension))
;
'chr debug_event'(redo(Suspension)),
fail
),
GetPost,
GetPostValue,
( Post==triggered ->
UpdatePost % catching constraints that did not do anything
;
true
)
;
true
),
Clause2Recursion
)
;
run_suspensions_goal(Constraint,[Suspension|Suspensions],Clause2Head),
static_suspension_term(Constraint,SuspensionTerm),
get_static_suspension_term_field(arguments,Constraint,SuspensionTerm,Arguments),
append(Arguments,[Suspension],VarsSusp),
make_suspension_continuation_goal(Constraint,VarsSusp,Continuation),
run_suspensions_goal(Constraint,Suspensions,Clause2Recursion),
( uses_field(Constraint,generation) ->
get_update_static_suspension_field(Constraint,Suspension,SuspensionTerm,generation,Gen,Generation,GetGeneration,UpdateGeneration),
GenerationHandling = ( GetGeneration, Generation is Gen+1, UpdateGeneration)
;
GenerationHandling = true
),
get_update_static_suspension_field(Constraint,Suspension,SuspensionTerm,state,State,triggered,GetState,UpdateState),
get_update_static_suspension_field(Constraint,Suspension,SuspensionTerm,state,Post,active,GetPostState,UpdatePostState),
if_used_state(Constraint,removed,
( GetState,
( State==active
-> ReactivateConstraint
; true)
),ReactivateConstraint,CondReactivate),
ReactivateConstraint =
(
UpdateState,
GenerationHandling,
Continuation,
GetPostState,
( Post==triggered ->
UpdatePostState % catching constraints that did not do anything
;
true
)
),
Clause2 =
(
Clause2Head :-
Suspension = SuspensionTerm,
CondReactivate,
Clause2Recursion
)
)
;
List = Tail
).
%~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
generate_attach_increment(Clauses) :-
get_max_constraint_index(N),
( is_used_auxiliary_predicate(attach_increment), N > 0 ->
Clauses = [Clause1,Clause2],
generate_attach_increment_empty(Clause1),
( N == 1 ->
generate_attach_increment_one(Clause2)
;
generate_attach_increment_many(N,Clause2)
)
;
Clauses = []
).
generate_attach_increment_empty((attach_increment([],_) :- true)).
generate_attach_increment_one(Clause) :-
Head = attach_increment([Var|Vars],Susps),
get_target_module(Mod),
chr_not_locked(Var,NotLocked),
Body =
(
NotLocked,
( get_attr(Var,Mod,VarSusps) ->
sort(VarSusps,SortedVarSusps),
'chr merge_attributes'(Susps,SortedVarSusps,MergedSusps),
put_attr(Var,Mod,MergedSusps)
;
put_attr(Var,Mod,Susps)
),
attach_increment(Vars,Susps)
),
Clause = (Head :- Body).
generate_attach_increment_many(N,Clause) :-
Head = attach_increment([Var|Vars],TAttr1),
% writeln(merge_attributes_1_before),
merge_attributes(N,TAttr1,TAttr2,MergeGoal,Attr),
% writeln(merge_attributes_1_after),
get_target_module(Mod),
chr_not_locked(Var,NotLocked),
Body =
(
NotLocked,
( get_attr(Var,Mod,TAttr2) ->
MergeGoal,
put_attr(Var,Mod,Attr)
;
put_attr(Var,Mod,TAttr1)
),
attach_increment(Vars,TAttr1)
),
Clause = (Head :- Body).
%% attr_unify_hook
generate_attr_unify_hook(Clauses) :-
get_max_constraint_index(N),
( N == 0 ->
Clauses = []
;
Clauses = [GoalsClause|HookClauses],
GoalsClause = attribute_goals(_,Goals,Goals),
( N == 1 ->
generate_attr_unify_hook_one(HookClauses)
;
generate_attr_unify_hook_many(N,HookClauses)
)
).
generate_attr_unify_hook_one([Clause]) :-
Head = attr_unify_hook(Susps,Other),
get_target_module(Mod),
get_indexed_constraint(1,C),
( get_store_type(C,ST),
( ST = default ; ST = multi_store(STs), memberchk(default,STs) ) ->
make_run_suspensions(NewSusps,SortedSusps,WakeNewSusps),
make_run_suspensions(SortedSusps,SortedSusps,WakeSusps),
( atomic_types_suspended_constraint(C) ->
SortGoal1 = true,
SortedSusps = Susps,
SortGoal2 = true,
SortedOtherSusps = OtherSusps,
MergeGoal = (append(Susps,OtherSusps,List), sort(List,NewSusps)),
NonvarBody = true
;
SortGoal1 = sort(Susps, SortedSusps),
SortGoal2 = sort(OtherSusps,SortedOtherSusps),
MergeGoal = 'chr merge_attributes'(SortedSusps,SortedOtherSusps,NewSusps),
use_auxiliary_predicate(attach_increment),
NonvarBody =
( compound(Other) ->
term_variables(Other,OtherVars),
attach_increment(OtherVars, SortedSusps)
;
true
)
),
Body =
(
SortGoal1,
( var(Other) ->
( get_attr(Other,Mod,OtherSusps) ->
SortGoal2,
MergeGoal,
put_attr(Other,Mod,NewSusps),
WakeNewSusps
;
put_attr(Other,Mod,SortedSusps),
WakeSusps
)
;
NonvarBody,
WakeSusps
)
),
Clause = (Head :- Body)
; get_store_type(C,var_assoc_store(VarIndex,KeyIndex)) ->
make_run_suspensions(List,List,WakeNewSusps),
MergeGoal = (merge_into_assoc_store(Susps,OtherSusps,List)),
Body =
( get_attr(Other,Mod,OtherSusps) ->
MergeGoal,
WakeNewSusps
;
put_attr(Other,Mod,Susps)
),
Clause = (Head :- Body)
).
generate_attr_unify_hook_many(N,[Clause]) :-
chr_pp_flag(dynattr,off), !,
Head = attr_unify_hook(Attr,Other),
get_target_module(Mod),
make_attr(N,Mask,SuspsList,Attr),
bagof(Sort,A ^ B ^ ( member(A,SuspsList) , Sort = sort(A,B) ) , SortGoalList),
list2conj(SortGoalList,SortGoals),
bagof(B, A ^ member(sort(A,B),SortGoalList), SortedSuspsList),
merge_attributes2(N,Mask,SortedSuspsList,TOtherAttr,MergeGoal,MergedAttr),
get_all_suspensions2(N,MergedAttr,MergedSuspsList),
make_attr(N,Mask,SortedSuspsList,SortedAttr),
make_run_suspensions_loop(MergedSuspsList,SortedSuspsList,WakeMergedSusps),
make_run_suspensions_loop(SortedSuspsList,SortedSuspsList,WakeSortedSusps),
( forall((between(1,N,Index), get_indexed_constraint(Index,Constraint)),atomic_types_suspended_constraint(Constraint)) ->
NonvarBody = true
;
use_auxiliary_predicate(attach_increment),
NonvarBody =
( compound(Other) ->
term_variables(Other,OtherVars),
attach_increment(OtherVars,SortedAttr)
;
true
)
),
Body =
(
SortGoals,
( var(Other) ->
( get_attr(Other,Mod,TOtherAttr) ->
MergeGoal,
put_attr(Other,Mod,MergedAttr),
WakeMergedSusps
;
put_attr(Other,Mod,SortedAttr),
WakeSortedSusps
)
;
NonvarBody,
WakeSortedSusps
)
),
Clause = (Head :- Body).
% NEW
generate_attr_unify_hook_many(N,Clauses) :-
Head = attr_unify_hook(Attr,Other),
get_target_module(Mod),
normalize_attr(Attr,NormalGoal,NormalAttr),
normalize_attr(OtherAttr,NormalOtherGoal,NormalOtherAttr),
merge_attributes(N,NormalAttr,NormalOtherAttr,MergeGoal,MergedAttr),
make_run_suspensions(N),
( forall((between(1,N,Index), get_indexed_constraint(Index,Constraint)),atomic_types_suspended_constraint(Constraint)) ->
NonvarBody = true
;
use_auxiliary_predicate(attach_increment),
NonvarBody =
( compound(Other) ->
term_variables(Other,OtherVars),
attach_increment(OtherVars,NormalAttr)
;
true
)
),
Body =
(
NormalGoal,
( var(Other) ->
( get_attr(Other,Mod,OtherAttr) ->
NormalOtherGoal,
MergeGoal,
put_attr(Other,Mod,MergedAttr),
'$dispatch_run_suspensions'(MergedAttr)
;
put_attr(Other,Mod,NormalAttr),
'$dispatch_run_suspensions'(NormalAttr)
)
;
NonvarBody,
'$dispatch_run_suspensions'(NormalAttr)
)
),
Clause = (Head :- Body),
Clauses = [Clause,DispatchList1,DispatchList2|Dispatchers],
DispatchList1 = ('$dispatch_run_suspensions'([])),
DispatchList2 = ('$dispatch_run_suspensions'([Pos-List|Rest]) :- '$dispatch_run_suspensions'(Pos,List),'$dispatch_run_suspensions'(Rest)),
run_suspensions_dispatchers(N,[],Dispatchers).
% NEW
run_suspensions_dispatchers(N,Acc,Dispatchers) :-
( N > 0 ->
get_indexed_constraint(N,C),
NAcc = [('$dispatch_run_suspensions'(N,List) :- Body)|Acc],
( may_trigger(C) ->
run_suspensions_goal(C,List,Body)
;
Body = true
),
M is N - 1,
run_suspensions_dispatchers(M,NAcc,Dispatchers)
;
Dispatchers = Acc
).
% NEW
make_run_suspensions(N) :-
( N > 0 ->
( get_indexed_constraint(N,C),
may_trigger(C) ->
use_auxiliary_predicate(run_suspensions,C)
;
true
),
M is N - 1,
make_run_suspensions(M)
;
true
).
make_run_suspensions(AllSusps,OneSusps,Goal) :-
make_run_suspensions(1,AllSusps,OneSusps,Goal).
make_run_suspensions(Index,AllSusps,OneSusps,Goal) :-
( get_indexed_constraint(Index,C), may_trigger(C) ->
use_auxiliary_predicate(run_suspensions,C),
( wakes_partially(C) ->
run_suspensions_goal(C,OneSusps,Goal)
;
run_suspensions_goal(C,AllSusps,Goal)
)
;
Goal = true
).
make_run_suspensions_loop(AllSuspsList,OneSuspsList,Goal) :-
make_run_suspensions_loop(AllSuspsList,OneSuspsList,1,Goal).
make_run_suspensions_loop([],[],_,true).
make_run_suspensions_loop([AllSusps|AllSuspsList],[OneSusps|OneSuspsList],I,(Goal,Goals)) :-
make_run_suspensions(I,AllSusps,OneSusps,Goal),
J is I + 1,
make_run_suspensions_loop(AllSuspsList,OneSuspsList,J,Goals).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% $insert_in_store_F/A
% $delete_from_store_F/A
generate_insert_delete_constraints([],[]).
generate_insert_delete_constraints([FA|Rest],Clauses) :-
( is_stored(FA) ->
generate_insert_delete_constraint(FA,Clauses,RestClauses)
;
Clauses = RestClauses
),
generate_insert_delete_constraints(Rest,RestClauses).
generate_insert_delete_constraint(FA,Clauses,RestClauses) :-
insert_constraint_clause(FA,Clauses,RestClauses1),
delete_constraint_clause(FA,RestClauses1,RestClauses).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% insert_in_store
insert_constraint_goal(FA,Susp,Vars,Goal) :-
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(insert_in_store,FA),
insert_constraint_atom(FA,Susp,Goal)
;
delay_phase_end(validate_store_type_assumptions,
( insert_constraint_body(FA,Susp,UsedVars,Goal),
insert_constraint_direct_used_vars(UsedVars,Vars)
)
)
).
insert_constraint_direct_used_vars([],_).
insert_constraint_direct_used_vars([Index-Var|Rest],Vars) :-
nth1(Index,Vars,Var),
insert_constraint_direct_used_vars(Rest,Vars).
insert_constraint_atom(FA,Susp,Call) :-
make_name('$insert_in_store_',FA,Functor),
Call =.. [Functor,Susp].
insert_constraint_clause(C,Clauses,RestClauses) :-
( is_used_auxiliary_predicate(insert_in_store,C) ->
Clauses = [Clause|RestClauses],
Clause = (Head :- InsertCounterInc,VarsBody,Body),
insert_constraint_atom(C,Susp,Head),
insert_constraint_body(C,Susp,UsedVars,Body),
insert_constraint_used_vars(UsedVars,C,Susp,VarsBody),
( chr_pp_flag(store_counter,on) ->
InsertCounterInc = '$insert_counter_inc'
;
InsertCounterInc = true
)
;
Clauses = RestClauses
).
insert_constraint_used_vars([],_,_,true).
insert_constraint_used_vars([Index-Var|Rest],C,Susp,(Goal,Goals)) :-
get_dynamic_suspension_term_field(argument(Index),C,Susp,Var,Goal),
insert_constraint_used_vars(Rest,C,Susp,Goals).
insert_constraint_body(C,Susp,UsedVars,Body) :-
get_store_type(C,StoreType),
insert_constraint_body(StoreType,C,Susp,UsedVars,Body).
insert_constraint_body(default,C,Susp,[],Body) :-
global_list_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,Cell,UpdateStoreGoal),
( chr_pp_flag(debugable,on) ->
Cell = [Susp|Store],
Body =
(
GetStoreGoal,
UpdateStoreGoal
)
;
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,Cell,SetGoal),
Body =
(
GetStoreGoal,
Cell = [Susp|Store],
UpdateStoreGoal,
( Store = [NextSusp|_] ->
SetGoal
;
true
)
)
).
% get_target_module(Mod),
% get_max_constraint_index(Total),
% ( Total == 1 ->
% generate_attach_body_1(C,Store,Susp,AttachBody)
% ;
% generate_attach_body_n(C,Store,Susp,AttachBody)
% ),
% Body =
% (
% 'chr default_store'(Store),
% AttachBody
% ).
insert_constraint_body(multi_inthash(Indexes),C,Susp,[],Body) :-
generate_multi_inthash_insert_constraint_bodies(Indexes,C,Susp,Body).
insert_constraint_body(multi_hash(Indexes),C,Susp,MixedUsedVars,Body) :-
generate_multi_hash_insert_constraint_bodies(Indexes,C,Susp,Body,MixedUsedVars),
sort_out_used_vars(MixedUsedVars,UsedVars).
insert_constraint_body(atomic_constants(Index,_,_),C,Susp,UsedVars,Body) :-
multi_hash_key_direct(C,Index,Susp,Key,UsedVars),
constants_store_index_name(C,Index,IndexName),
IndexLookup =.. [IndexName,Key,StoreName],
Body =
( IndexLookup ->
nb_getval(StoreName,Store),
b_setval(StoreName,[Susp|Store])
;
true
).
insert_constraint_body(ground_constants(Index,_,_),C,Susp,UsedVars,Body) :-
multi_hash_key_direct(C,Index,Susp,Key,UsedVars),
constants_store_index_name(C,Index,IndexName),
IndexLookup =.. [IndexName,Key,StoreName],
Body =
( IndexLookup ->
nb_getval(StoreName,Store),
b_setval(StoreName,[Susp|Store])
;
true
).
insert_constraint_body(global_ground,C,Susp,[],Body) :-
global_ground_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,Cell,UpdateStoreGoal),
( chr_pp_flag(debugable,on) ->
Cell = [Susp|Store],
Body =
(
GetStoreGoal,
UpdateStoreGoal
)
;
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,Cell,SetGoal),
Body =
(
GetStoreGoal,
Cell = [Susp|Store],
UpdateStoreGoal,
( Store = [NextSusp|_] ->
SetGoal
;
true
)
)
).
% global_ground_store_name(C,StoreName),
% make_get_store_goal(StoreName,Store,GetStoreGoal),
% make_update_store_goal(StoreName,[Susp|Store],UpdateStoreGoal),
% Body =
% (
% GetStoreGoal, % nb_getval(StoreName,Store),
% UpdateStoreGoal % b_setval(StoreName,[Susp|Store])
% ).
insert_constraint_body(var_assoc_store(VarIndex,AssocIndex),C,Susp,[VarIndex-Variable,AssocIndex-Key],Body) :-
% TODO: generalize to more than one !!!
get_target_module(Module),
Body = ( get_attr(Variable,Module,AssocStore) ->
insert_assoc_store(AssocStore,Key,Susp)
;
new_assoc_store(AssocStore),
put_attr(Variable,Module,AssocStore),
insert_assoc_store(AssocStore,Key,Susp)
).
insert_constraint_body(global_singleton,C,Susp,[],Body) :-
global_singleton_store_name(C,StoreName),
make_update_store_goal(StoreName,Susp,UpdateStoreGoal),
Body =
(
UpdateStoreGoal
).
insert_constraint_body(multi_store(StoreTypes),C,Susp,UsedVars,Body) :-
maplist(insert_constraint_body1(C,Susp),StoreTypes,NestedUsedVars,Bodies),
list2conj(Bodies,Body),
sort_out_used_vars(NestedUsedVars,UsedVars).
insert_constraint_body1(C,Susp,StoreType,UsedVars,Body) :-
insert_constraint_body(StoreType,C,Susp,UsedVars,Body).
insert_constraint_body(identifier_store(Index),C,Susp,UsedVars,Body) :-
UsedVars = [Index-Var],
get_identifier_size(ISize),
functor(Struct,struct,ISize),
get_identifier_index(C,Index,IIndex),
arg(IIndex,Struct,Susps),
Body = (Var = Struct, setarg(IIndex,Var,[Susp|Susps])).
insert_constraint_body(type_indexed_identifier_store(Index,IndexType),C,Susp,UsedVars,Body) :-
UsedVars = [Index-Var],
type_indexed_identifier_structure(IndexType,Struct),
get_type_indexed_identifier_index(IndexType,C,Index,IIndex),
arg(IIndex,Struct,Susps),
Body = (Var = Struct, setarg(IIndex,Var,[Susp|Susps])).
sort_out_used_vars(NestedUsedVars,UsedVars) :-
flatten(NestedUsedVars,FlatUsedVars),
sort(FlatUsedVars,SortedFlatUsedVars),
sort_out_used_vars1(SortedFlatUsedVars,UsedVars).
sort_out_used_vars1([],[]).
sort_out_used_vars1([I-V],L) :- !, L = [I-V].
sort_out_used_vars1([I-X,J-Y|R],L) :-
( I == J ->
X = Y,
sort_out_used_vars1([I-X|R],L)
;
L = [I-X|T],
sort_out_used_vars1([J-Y|R],T)
).
generate_multi_inthash_insert_constraint_bodies([],_,_,true).
generate_multi_inthash_insert_constraint_bodies([Index|Indexes],FA,Susp,(Body,Bodies)) :-
multi_hash_store_name(FA,Index,StoreName),
multi_hash_key(FA,Index,Susp,KeyBody,Key),
Body =
(
KeyBody,
nb_getval(StoreName,Store),
insert_iht(Store,Key,Susp)
),
generate_multi_inthash_insert_constraint_bodies(Indexes,FA,Susp,Bodies).
generate_multi_hash_insert_constraint_bodies([],_,_,true,[]).
generate_multi_hash_insert_constraint_bodies([Index|Indexes],FA,Susp,(Body,Bodies),[UsedVars|MoreUsedVars]) :-
multi_hash_store_name(FA,Index,StoreName),
multi_hash_key_direct(FA,Index,Susp,Key,UsedVars),
make_get_store_goal(StoreName,Store,GetStoreGoal),
( chr_pp_flag(ht_removal,on)
-> ht_prev_field(Index,PrevField),
set_dynamic_suspension_term_field(PrevField,FA,NextSusp,Result,
SetGoal),
Body =
(
GetStoreGoal,
insert_ht(Store,Key,Susp,Result),
( Result = [_,NextSusp|_]
-> SetGoal
; true
)
)
; Body =
(
GetStoreGoal,
insert_ht(Store,Key,Susp)
)
),
generate_multi_hash_insert_constraint_bodies(Indexes,FA,Susp,Bodies,MoreUsedVars).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% Delete
delete_constraint_clause(C,Clauses,RestClauses) :-
( is_used_auxiliary_predicate(delete_from_store,C) ->
Clauses = [Clause|RestClauses],
Clause = (Head :- Body),
delete_constraint_atom(C,Susp,Head),
C = F/A,
functor(Head,F,A),
delete_constraint_body(C,Head,Susp,[],Body)
;
Clauses = RestClauses
).
delete_constraint_goal(Head,Susp,VarDict,Goal) :-
functor(Head,F,A),
C = F/A,
( chr_pp_flag(inline_insertremove,off) ->
use_auxiliary_predicate(delete_from_store,C),
delete_constraint_atom(C,Susp,Goal)
;
delay_phase_end(validate_store_type_assumptions, delete_constraint_body(C,Head,Susp,VarDict,Goal))
).
delete_constraint_atom(C,Susp,Atom) :-
make_name('$delete_from_store_',C,Functor),
Atom =.. [Functor,Susp].
delete_constraint_body(C,Head,Susp,VarDict,Body) :-
Body = (CounterBody,DeleteBody),
( chr_pp_flag(store_counter,on) ->
CounterBody = '$delete_counter_inc'
;
CounterBody = true
),
get_store_type(C,StoreType),
delete_constraint_body(StoreType,C,Head,Susp,VarDict,DeleteBody).
delete_constraint_body(default,C,_,Susp,_,Body) :-
( chr_pp_flag(debugable,on) ->
global_list_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,NStore,UpdateStoreGoal),
Body =
(
GetStoreGoal, % nb_getval(StoreName,Store),
'chr sbag_del_element'(Store,Susp,NStore),
UpdateStoreGoal % b_setval(StoreName,NStore)
)
;
get_dynamic_suspension_term_field(global_list_prev,C,Susp,PredCell,GetGoal),
global_list_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,Tail,UpdateStoreGoal),
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,_,SetGoal1),
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,PredCell,SetGoal2),
Body =
(
GetGoal,
( var(PredCell) ->
GetStoreGoal, % nb_getval(StoreName,Store),
Store = [_|Tail],
UpdateStoreGoal,
( Tail = [NextSusp|_] ->
SetGoal1
;
true
)
;
PredCell = [_,_|Tail],
setarg(2,PredCell,Tail),
( Tail = [NextSusp|_] ->
SetGoal2
;
true
)
)
)
).
% get_target_module(Mod),
% get_max_constraint_index(Total),
% ( Total == 1 ->
% generate_detach_body_1(C,Store,Susp,DetachBody),
% Body =
% (
% 'chr default_store'(Store),
% DetachBody
% )
% ;
% generate_detach_body_n(C,Store,Susp,DetachBody),
% Body =
% (
% 'chr default_store'(Store),
% DetachBody
% )
% ).
delete_constraint_body(multi_inthash(Indexes),C,_,Susp,_,Body) :-
generate_multi_inthash_delete_constraint_bodies(Indexes,C,Susp,Body).
delete_constraint_body(multi_hash(Indexes),C,Head,Susp,VarDict,Body) :-
generate_multi_hash_delete_constraint_bodies(Indexes,C,Head,Susp,VarDict,Body).
delete_constraint_body(atomic_constants(Index,_,_),C,Head,Susp,VarDict,Body) :-
multi_hash_key(C,Head,Index,Susp,VarDict,KeyBody,Key),
constants_store_index_name(C,Index,IndexName),
IndexLookup =.. [IndexName,Key,StoreName],
Body =
( KeyBody,
( IndexLookup ->
nb_getval(StoreName,Store),
'chr sbag_del_element'(Store,Susp,NStore),
b_setval(StoreName,NStore)
;
true
)).
delete_constraint_body(ground_constants(Index,_,_),C,Head,Susp,VarDict,Body) :-
multi_hash_key(C,Head,Index,Susp,VarDict,KeyBody,Key),
constants_store_index_name(C,Index,IndexName),
IndexLookup =.. [IndexName,Key,StoreName],
Body =
( KeyBody,
( IndexLookup ->
nb_getval(StoreName,Store),
'chr sbag_del_element'(Store,Susp,NStore),
b_setval(StoreName,NStore)
;
true
)).
delete_constraint_body(global_ground,C,_,Susp,_,Body) :-
( chr_pp_flag(debugable,on) ->
global_ground_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,NStore,UpdateStoreGoal),
Body =
(
GetStoreGoal, % nb_getval(StoreName,Store),
'chr sbag_del_element'(Store,Susp,NStore),
UpdateStoreGoal % b_setval(StoreName,NStore)
)
;
get_dynamic_suspension_term_field(global_list_prev,C,Susp,PredCell,GetGoal),
global_ground_store_name(C,StoreName),
make_get_store_goal(StoreName,Store,GetStoreGoal),
make_update_store_goal(StoreName,Tail,UpdateStoreGoal),
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,_,SetGoal1),
set_dynamic_suspension_term_field(global_list_prev,C,NextSusp,PredCell,SetGoal2),
Body =
(
GetGoal,
( var(PredCell) ->
GetStoreGoal, % nb_getval(StoreName,Store),
Store = [_|Tail],
UpdateStoreGoal,
( Tail = [NextSusp|_] ->
SetGoal1
;
true
)
;
PredCell = [_,_|Tail],
setarg(2,PredCell,Tail),
( Tail = [NextSusp|_] ->
SetGoal2
;
true
)
)
)
).
% global_ground_store_name(C,StoreName),
% make_get_store_goal(StoreName,Store,GetStoreGoal),
% make_update_store_goal(StoreName,NStore,UpdateStoreGoal),
% Body =
% (
% GetStoreGoal, % nb_getval(StoreName,Store),
% 'chr sbag_del_element'(Store,Susp,NStore),
% UpdateStoreGoal % b_setval(StoreName,NStore)
% ).
delete_constraint_body(var_assoc_store(VarIndex,AssocIndex),C,_,Susp,_,Body) :-
get_target_module(Module),
get_dynamic_suspension_term_field(argument(VarIndex),C,Susp,Variable,VariableGoal),
get_dynamic_suspension_term_field(argument(AssocIndex),C,Susp,Key,KeyGoal),
Body = (
VariableGoal,
get_attr(Variable,Module,AssocStore),
KeyGoal,
delete_assoc_store(AssocStore,Key,Susp)
).
delete_constraint_body(global_singleton,C,_,_Susp,_,Body) :-
global_singleton_store_name(C,StoreName),
make_update_store_goal(StoreName,[],UpdateStoreGoal),
Body =
(
UpdateStoreGoal % b_setval(StoreName,[])
).
delete_constraint_body(multi_store(StoreTypes),C,Head,Susp,VarDict,Body) :-
maplist(delete_constraint_body1(C,Head,Susp,VarDict),StoreTypes,Bodies),
list2conj(Bodies,Body).
delete_constraint_body1(C,Head,Susp,VarDict,StoreType,Body) :-
delete_constraint_body(StoreType,C,Head,Susp,VarDict,Body).
delete_constraint_body(identifier_store(Index),C,Head,Susp,VarDict,Body) :-
get_suspension_argument_possibly_in_scope(Head,VarDict,Susp,Index,Variable,VariableGoal),
get_identifier_size(ISize),
functor(Struct,struct,ISize),
get_identifier_index(C,Index,IIndex),
arg(IIndex,Struct,Susps),
Body = (
VariableGoal,
Variable = Struct,
'chr sbag_del_element'(Susps,Susp,NSusps),
setarg(IIndex,Variable,NSusps)
).
delete_constraint_body(type_indexed_identifier_store(Index,IndexType),C,Head,Susp,VarDict,Body) :-
get_suspension_argument_possibly_in_scope(Head,VarDict,Susp,Index,Variable,VariableGoal),
type_indexed_identifier_structure(IndexType,Struct),
get_type_indexed_identifier_index(IndexType,C,Index,IIndex),
arg(IIndex,Struct,Susps),
Body = (
VariableGoal,
Variable = Struct,
'chr sbag_del_element'(Susps,Susp,NSusps),
setarg(IIndex,Variable,NSusps)
).
generate_multi_inthash_delete_constraint_bodies([],_,_,true).
generate_multi_inthash_delete_constraint_bodies([Index|Indexes],FA,Susp,(Body,Bodies)) :-
multi_hash_store_name(FA,Index,StoreName),
multi_hash_key(FA,Index,Susp,KeyBody,Key),
Body =
(
KeyBody,
nb_getval(StoreName,Store),
delete_iht(Store,Key,Susp)
),
generate_multi_inthash_delete_constraint_bodies(Indexes,FA,Susp,Bodies).
generate_multi_hash_delete_constraint_bodies([],_,_,_,_,true).
generate_multi_hash_delete_constraint_bodies([Index|Indexes],C,Head,Susp,VarDict,(Body,Bodies)) :-
multi_hash_store_name(C,Index,StoreName),
multi_hash_key(C,Head,Index,Susp,VarDict,KeyBody,Key),
make_get_store_goal(StoreName,Store,GetStoreGoal),
( chr_pp_flag(ht_removal,on)
-> ht_prev_field(Index,PrevField),
get_dynamic_suspension_term_field(PrevField,C,Susp,Prev,GetGoal),
set_dynamic_suspension_term_field(PrevField,C,NextSusp,_,
SetGoal1),
set_dynamic_suspension_term_field(PrevField,C,NextSusp,Prev,
SetGoal2),
Body =
(
GetGoal,
( var(Prev)
-> GetStoreGoal,
KeyBody,
delete_first_ht(Store,Key,Values),
( Values = [NextSusp|_]
-> SetGoal1
; true
)
; Prev = [_,_|Values],
setarg(2,Prev,Values),
( Values = [NextSusp|_]
-> SetGoal2
; true
)
)
)
; Body =
(
KeyBody,
GetStoreGoal, % nb_getval(StoreName,Store),
delete_ht(Store,Key,Susp)
)
),
generate_multi_hash_delete_constraint_bodies(Indexes,FA,Head,Susp,VarDict,Bodies).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
module_initializer/1,
module_initializers/1.
module_initializers(G), module_initializer(Initializer) <=>
G = (Initializer,Initializers),
module_initializers(Initializers).
module_initializers(G) <=>
G = true.
generate_attach_code(Constraints,Clauses) :-
enumerate_stores_code(Constraints,Enumerate),
append(Enumerate,L,Clauses),
generate_attach_code(Constraints,L,T),
module_initializers(Initializers),
prolog_global_variables_code(PrologGlobalVariables),
% Do not rename or the 'chr_initialization' predicate
% without warning SSS
T = [('$chr_initialization' :- Initializers),(:- initialization '$chr_initialization')|PrologGlobalVariables].
generate_attach_code([],L,L).
generate_attach_code([C|Cs],L,T) :-
get_store_type(C,StoreType),
generate_attach_code(StoreType,C,L,L1),
generate_attach_code(Cs,L1,T).
generate_attach_code(default,C,L,T) :-
global_list_store_initialisation(C,L,T).
generate_attach_code(multi_inthash(Indexes),C,L,T) :-
multi_inthash_store_initialisations(Indexes,C,L,L1),
multi_inthash_via_lookups(Indexes,C,L1,T).
generate_attach_code(multi_hash(Indexes),C,L,T) :-
multi_hash_store_initialisations(Indexes,C,L,L1),
multi_hash_lookups(Indexes,C,L1,T).
generate_attach_code(atomic_constants(Index,Constants,_),C,L,T) :-
constants_initializers(C,Index,Constants),
atomic_constants_code(C,Index,Constants,L,T).
generate_attach_code(ground_constants(Index,Constants,_),C,L,T) :-
constants_initializers(C,Index,Constants),
ground_constants_code(C,Index,Constants,L,T).
generate_attach_code(global_ground,C,L,T) :-
global_ground_store_initialisation(C,L,T).
generate_attach_code(var_assoc_store(_,_),_,L,L) :-
use_auxiliary_module(chr_assoc_store).
generate_attach_code(global_singleton,C,L,T) :-
global_singleton_store_initialisation(C,L,T).
generate_attach_code(multi_store(StoreTypes),C,L,T) :-
multi_store_generate_attach_code(StoreTypes,C,L,T).
generate_attach_code(identifier_store(Index),C,L,T) :-
get_identifier_index(C,Index,IIndex),
( IIndex == 2 ->
get_identifier_size(ISize),
functor(Struct,struct,ISize),
Struct =.. [_,Label|Stores],
set_elems(Stores,[]),
Clause1 = new_identifier(Label,Struct),
functor(Struct2,struct,ISize),
arg(1,Struct2,Label2),
Clause2 =
( user:portray(Struct2) :-
write('<id:'),
print(Label2),
write('>')
),
functor(Struct3,struct,ISize),
arg(1,Struct3,Label3),
Clause3 = identifier_label(Struct3,Label3),
L = [Clause1,Clause2,Clause3|T]
;
L = T
).
generate_attach_code(type_indexed_identifier_store(Index,IndexType),C,L,T) :-
get_type_indexed_identifier_index(IndexType,C,Index,IIndex),
( IIndex == 2 ->
identifier_store_initialization(IndexType,L,L1),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
get_type_indexed_identifier_size(IndexType,ISize),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
type_indexed_identifier_structure(IndexType,Struct),
Struct =.. [_,Label|Stores],
set_elems(Stores,[]),
type_indexed_identifier_name(IndexType,new_identifier,Name1),
Clause1 =.. [Name1,Label,Struct],
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
Goal1 =.. [Name1,Label1b,S1b],
type_indexed_identifier_structure(IndexType,Struct1b),
Struct1b =.. [_,Label1b|Stores1b],
set_elems(Stores1b,[]),
Expansion1 = (S1b = Struct1b),
Clause1b = user:goal_expansion(Goal1,Expansion1),
% writeln(Clause1-Clause1b),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
type_indexed_identifier_structure(IndexType,Struct2),
arg(1,Struct2,Label2),
Clause2 =
( user:portray(Struct2) :-
write('<id:'),
print(Label2),
write('>')
),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
type_indexed_identifier_structure(IndexType,Struct3),
arg(1,Struct3,Label3),
type_indexed_identifier_name(IndexType,identifier_label,Name3),
Clause3 =.. [Name3,Struct3,Label3],
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
Goal3b =.. [Name3,S3b,L3b],
type_indexed_identifier_structure(IndexType,Struct3b),
arg(1,Struct3b,L3b),
Expansion3b = (S3b = Struct3b),
Clause3b = ( user:goal_expansion(Goal3b,Expansion3b) :- writeln(expanding)),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
identifier_store_name(IndexType,GlobalVariable),
lookup_identifier_atom(IndexType,X,IX,LookupAtom),
type_indexed_identifier_name(IndexType,new_identifier,NewIdentifierFunctor),
NewIdentifierGoal =.. [NewIdentifierFunctor,X,IX],
Clause4 =
( LookupAtom :-
nb_getval(GlobalVariable,HT),
( lookup_ht(HT,X,[IX]) ->
true
;
NewIdentifierGoal,
insert_ht(HT,X,IX)
)
),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
lookup_only_identifier_atom(IndexType,Y,IY,LookupOnlyAtom),
Clause5 =
( LookupOnlyAtom :-
nb_getval(GlobalVariable,HT0),
lookup_ht(HT0,Y,[IY])
),
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
L1 = [(:- multifile goal_expansion/2),(:- dynamic goal_expansion/2),Clause1,Clause1b,Clause2,Clause3,Clause3b,Clause4,Clause5|T]
;
L = T
).
constants_initializers(C,Index,Constants) :-
maplist(constant_initializer(C,Index),Constants).
constant_initializer(C,Index,Constant) :-
constants_store_name(C,Index,Constant,StoreName),
prolog_global_variable(StoreName),
module_initializer(nb_setval(StoreName,[])).
lookup_identifier_atom(Key,X,IX,Atom) :-
atom_concat('lookup_identifier_',Key,LookupFunctor),
Atom =.. [LookupFunctor,X,IX].
lookup_only_identifier_atom(Key,X,IX,Atom) :-
atom_concat('lookup_only_identifier_',Key,LookupFunctor),
Atom =.. [LookupFunctor,X,IX].
identifier_label_atom(IndexType,IX,X,Atom) :-
type_indexed_identifier_name(IndexType,identifier_label,Name),
Atom =.. [Name,IX,X].
multi_store_generate_attach_code([],_,L,L).
multi_store_generate_attach_code([ST|STs],C,L,T) :-
generate_attach_code(ST,C,L,L1),
multi_store_generate_attach_code(STs,C,L1,T).
multi_inthash_store_initialisations([],_,L,L).
multi_inthash_store_initialisations([Index|Indexes],FA,L,T) :-
use_auxiliary_module(chr_integertable_store),
multi_hash_store_name(FA,Index,StoreName),
module_initializer((new_iht(HT),nb_setval(StoreName,HT))),
% L = [(:- (chr_integertable_store:new_ht(HT),nb_setval(StoreName,HT)) )|L1],
L1 = L,
multi_inthash_store_initialisations(Indexes,FA,L1,T).
multi_hash_store_initialisations([],_,L,L).
multi_hash_store_initialisations([Index|Indexes],FA,L,T) :-
use_auxiliary_module(chr_hashtable_store),
multi_hash_store_name(FA,Index,StoreName),
prolog_global_variable(StoreName),
make_init_store_goal(StoreName,HT,InitStoreGoal),
module_initializer((new_ht(HT),InitStoreGoal)),
L1 = L,
multi_hash_store_initialisations(Indexes,FA,L1,T).
global_list_store_initialisation(C,L,T) :-
( is_stored(C) ->
global_list_store_name(C,StoreName),
prolog_global_variable(StoreName),
make_init_store_goal(StoreName,[],InitStoreGoal),
module_initializer(InitStoreGoal)
;
true
),
L = T.
global_ground_store_initialisation(C,L,T) :-
global_ground_store_name(C,StoreName),
prolog_global_variable(StoreName),
make_init_store_goal(StoreName,[],InitStoreGoal),
module_initializer(InitStoreGoal),
L = T.
global_singleton_store_initialisation(C,L,T) :-
global_singleton_store_name(C,StoreName),
prolog_global_variable(StoreName),
make_init_store_goal(StoreName,[],InitStoreGoal),
module_initializer(InitStoreGoal),
L = T.
identifier_store_initialization(IndexType,L,T) :-
use_auxiliary_module(chr_hashtable_store),
identifier_store_name(IndexType,StoreName),
prolog_global_variable(StoreName),
make_init_store_goal(StoreName,HT,InitStoreGoal),
module_initializer((new_ht(HT),InitStoreGoal)),
L = T.
multi_inthash_via_lookups([],_,L,L).
multi_inthash_via_lookups([Index|Indexes],C,L,T) :-
multi_hash_lookup_head(C,Index,Key,SuspsList,Head),
multi_hash_lookup_body(C,inthash,Index,Key,SuspsList,Body),
L = [(Head :- Body)|L1],
multi_inthash_via_lookups(Indexes,C,L1,T).
multi_hash_lookups([],_,L,L).
multi_hash_lookups([Index|Indexes],C,L,T) :-
multi_hash_lookup_head(C,Index,Key,SuspsList,Head),
multi_hash_lookup_body(C,hash,Index,Key,SuspsList,Body),
L = [(Head :- Body)|L1],
multi_hash_lookups(Indexes,C,L1,T).
multi_hash_lookup_head(ConstraintSymbol,Index,Key,SuspsList,Head) :-
multi_hash_lookup_name(ConstraintSymbol,Index,Name),
Head =.. [Name,Key,SuspsList].
%% multi_hash_lookup_body(+ConstraintSymbol,+HashType,+Index,+Key,+SuspsList,-Goal) is det.
%
% Returns goal that performs hash table lookup.
multi_hash_lookup_body(ConstraintSymbol,HashType,Index,Key,SuspsList,Goal) :-
% INLINED:
get_store_type(ConstraintSymbol,multi_store(Stores)),
( memberchk(atomic_constants(Index,Constants,_),Stores) ->
( ground(Key) ->
constants_store_name(ConstraintSymbol,Index,Key,StoreName),
Goal = nb_getval(StoreName,SuspsList)
;
constants_store_index_name(ConstraintSymbol,Index,IndexName),
Lookup =.. [IndexName,Key,StoreName],
Goal = (Lookup, nb_getval(StoreName,SuspsList))
)
; memberchk(ground_constants(Index,Constants,_),Stores) ->
( ground(Key) ->
constants_store_name(ConstraintSymbol,Index,Key,StoreName),
Goal = nb_getval(StoreName,SuspsList)
;
constants_store_index_name(ConstraintSymbol,Index,IndexName),
Lookup =.. [IndexName,Key,StoreName],
Goal = (Lookup, nb_getval(StoreName,SuspsList))
)
; memberchk(multi_hash([Index]),Stores) ->
multi_hash_store_name(ConstraintSymbol,Index,StoreName),
make_get_store_goal(StoreName,HT,GetStoreGoal),
( HashType == hash, specialized_hash_term_call(ConstraintSymbol,Index,Key,Hash,HashCall) ->
Goal =
(
GetStoreGoal, % nb_getval(StoreName,HT),
HashCall, % hash_term(Key,Hash),
lookup_ht1(HT,Hash,Key,SuspsList)
)
;
lookup_hash_call(HashType,HT,Key,SuspsList,Lookup),
Goal =
(
GetStoreGoal, % nb_getval(StoreName,HT),
Lookup
)
)
; HashType == inthash ->
multi_hash_store_name(ConstraintSymbol,Index,StoreName),
make_get_store_goal(StoreName,HT,GetStoreGoal),
lookup_hash_call(HashType,HT,Key,SuspsList,Lookup),
Goal =
(
GetStoreGoal, % nb_getval(StoreName,HT),
Lookup
)
% ; % chr_error(internal,'Index ~w for constraint ~w does not exist!\n',[Index,ConstraintSymbol])
% find alternative index
% -> SubIndex + RestIndex
% -> SubKey + RestKeys
% multi_hash_lookup_goal(ConstraintSymbol,HashType,SubIndex,SubKey,SuspsList,SubGoal),
% instantiate rest goal?
% Goal = (SubGoal,RestGoal)
).
lookup_hash_call(hash,HT,Key,SuspsList,lookup_ht(HT,Key,SuspsList)).
lookup_hash_call(inthash,HT,Key,SuspsList,lookup_iht(HT,Key,SuspsList)).
specialized_hash_term_call(Constraint,Index,Key,Hash,Call) :-
( ground(Key) ->
% This is based on a property of SWI-Prolog's
% hash_term/2 predicate:
% the hash value is stable over repeated invocations
% of SWI-Prolog
hash_term(Key,Hash),
Call = true
% ; Index = [IndexPos],
% get_constraint_type(Constraint,ArgTypes),
% nth1(IndexPos,ArgTypes,Type),
% unalias_type(Type,NormalType),
% memberchk_eq(NormalType,[int,natural]) ->
% ( NormalType == int ->
% Call = (Hash is abs(Key))
% ;
% Hash = Key,
% Call = true
% )
% ;
% nonvar(Key),
% specialize_hash_term(Key,NewKey),
% NewKey \== Key,
% Call = hash_term(NewKey,Hash)
).
% specialize_hash_term(Term,NewTerm) :-
% ( ground(Term) ->
% hash_term(Term,NewTerm)
% ; var(Term) ->
% NewTerm = Term
% ;
% Term =.. [F|Args],
% maplist(specialize_hash_term,Args,NewArgs),
% NewTerm =.. [F|NewArgs]
% ).
multi_hash_lookup_goal(ConstraintSymbol,HashType,Index,Key,SuspsList,Goal) :-
% format(' * lookup of ~w on ~w with ~w.\n',[ConstraintSymbol,Index,Key]),
( /* chr_pp_flag(experiment,off) ->
true
; */ atomic(Key) ->
actual_atomic_multi_hash_keys(ConstraintSymbol,Index,[Key])
; ground(Key) ->
actual_ground_multi_hash_keys(ConstraintSymbol,Index,[Key])
;
( Index = [Pos],
get_constraint_arg_type(ConstraintSymbol,Pos,Type),
is_chr_constants_type(Type,_,_)
->
true
;
actual_non_ground_multi_hash_key(ConstraintSymbol,Index)
)
),
delay_phase_end(validate_store_type_assumptions,
multi_hash_lookup_body(ConstraintSymbol,HashType,Index,Key,SuspsList,Goal)).
:- chr_constraint actual_atomic_multi_hash_keys/3.
:- chr_option(mode,actual_atomic_multi_hash_keys(+,+,?)).
:- chr_constraint actual_ground_multi_hash_keys/3.
:- chr_option(mode,actual_ground_multi_hash_keys(+,+,?)).
:- chr_constraint actual_non_ground_multi_hash_key/2.
:- chr_option(mode,actual_non_ground_multi_hash_key(+,+)).
/*
actual_atomic_multi_hash_keys(C,Index,Keys)
==> format('Keys: ~w - ~w : ~w\n', [C,Index,Keys]).
actual_ground_multi_hash_keys(C,Index,Keys)
==> format('Keys: ~w - ~w : ~w\n', [C,Index,Keys]).
actual_non_ground_multi_hash_key(C,Index)
==> format('Keys: ~w - ~w : N/A\n', [C,Index]).
*/
actual_atomic_multi_hash_keys(C,Index,Keys1), actual_atomic_multi_hash_keys(C,Index,Keys2)
<=> append(Keys1,Keys2,Keys0),
sort(Keys0,Keys),
actual_atomic_multi_hash_keys(C,Index,Keys).
actual_ground_multi_hash_keys(C,Index,Keys1), actual_atomic_multi_hash_keys(C,Index,Keys2)
<=> append(Keys1,Keys2,Keys0),
sort(Keys0,Keys),
actual_ground_multi_hash_keys(C,Index,Keys).
actual_ground_multi_hash_keys(C,Index,Keys1), actual_ground_multi_hash_keys(C,Index,Keys2)
<=> append(Keys1,Keys2,Keys0),
sort(Keys0,Keys),
actual_ground_multi_hash_keys(C,Index,Keys).
actual_non_ground_multi_hash_key(C,Index) \ actual_non_ground_multi_hash_key(C,Index)
<=> true.
actual_non_ground_multi_hash_key(C,Index) \ actual_atomic_multi_hash_keys(C,Index,_)
<=> true.
actual_non_ground_multi_hash_key(C,Index) \ actual_ground_multi_hash_keys(C,Index,_)
<=> true.
%% multi_hash_lookup_name(+ConstraintSymbol,+Index,-Name)
%
% Returns predicate name of hash table lookup predicate.
multi_hash_lookup_name(F/A,Index,Name) :-
atom_concat_list(Index,IndexName),
atom_concat_list(['$via1_multi_hash_',F,'___',A,'-',IndexName],Name).
multi_hash_store_name(F/A,Index,Name) :-
get_target_module(Mod),
atom_concat_list(Index,IndexName),
atom_concat_list(['$chr_store_multi_hash_',Mod,'____',F,'___',A,'-',IndexName],Name).
multi_hash_key(FA,Index,Susp,KeyBody,Key) :-
( Index = [I] ->
get_dynamic_suspension_term_field(argument(I),FA,Susp,Key,KeyBody)
;
maplist(get_dynamic_suspension_term_field1(FA,Susp),Index,Keys,Bodies),
Key =.. [k|Keys],
list2conj(Bodies,KeyBody)
).
get_dynamic_suspension_term_field1(FA,Susp,I,KeyI,Goal) :-
get_dynamic_suspension_term_field(argument(I),FA,Susp,KeyI,Goal).
multi_hash_key(C,Head,Index,Susp,VarDict,KeyBody,Key) :-
( Index = [I] ->
get_suspension_argument_possibly_in_scope(Head,VarDict,Susp,I,Key,KeyBody)
;
maplist(get_suspension_argument_possibly_in_scope(Head,VarDict,Susp),Index,Keys,Bodies),
Key =.. [k|Keys],
list2conj(Bodies,KeyBody)
).
get_suspension_argument_possibly_in_scope(Head,VarDict,Susp,Index,Arg,Goal) :-
arg(Index,Head,OriginalArg),
( ground(OriginalArg), OriginalArg = '$chr_identifier_match'(Value,KeyType) ->
functor(Head,F,A),
lookup_identifier_atom(KeyType,Value,Arg,Goal)
; term_variables(OriginalArg,OriginalVars),
copy_term_nat(OriginalArg-OriginalVars,Arg-Vars),
translate(OriginalVars,VarDict,Vars) ->
Goal = true
;
functor(Head,F,A),
C = F/A,
get_dynamic_suspension_term_field(argument(Index),C,Susp,Arg,Goal)
).
multi_hash_key_direct(FA,Index,Susp,Key,UsedVars) :-
( Index = [I] ->
UsedVars = [I-Key]
;
pairup(Index,Keys,UsedVars),
Key =.. [k|Keys]
).
args(Index,Head,KeyArgs) :-
maplist(arg1(Head),Index,KeyArgs).
split_args(Indexes,Args,IArgs,NIArgs) :-
split_args(Indexes,Args,1,IArgs,NIArgs).
split_args([],Args,_,[],Args).
split_args([I|Is],[Arg|Args],J,IArgs,NIArgs) :-
NJ is J + 1,
( I == J ->
IArgs = [Arg|Rest],
split_args(Is,Args,NJ,Rest,NIArgs)
;
NIArgs = [Arg|Rest],
split_args([I|Is],Args,NJ,IArgs,Rest)
).
%-------------------------------------------------------------------------------
atomic_constants_code(C,Index,Constants,L,T) :-
constants_store_index_name(C,Index,IndexName),
maplist(atomic_constant_code(C,Index,IndexName),Constants,Clauses),
append(Clauses,T,L).
atomic_constant_code(C,Index,IndexName,Constant,Clause) :-
constants_store_name(C,Index,Constant,StoreName),
Clause =.. [IndexName,Constant,StoreName].
%-------------------------------------------------------------------------------
ground_constants_code(C,Index,Terms,L,T) :-
constants_store_index_name(C,Index,IndexName),
maplist(constants_store_name(C,Index),Terms,StoreNames),
length(Terms,N),
replicate(N,[],More),
trie_index([Terms|More],StoreNames,IndexName,L,T).
constants_store_name(F/A,Index,Term,Name) :-
get_target_module(Mod),
term_to_atom(Term,Constant),
term_to_atom(Index,IndexAtom),
atom_concat_list(['$chr_store_constants_',Mod,'____',F,'___',A,'___',IndexAtom,'___',Constant],Name).
constants_store_index_name(F/A,Index,Name) :-
get_target_module(Mod),
term_to_atom(Index,IndexAtom),
atom_concat_list(['$chr_store_constants_',Mod,'____',F,'___',A,'___',IndexAtom],Name).
% trie index code {{{
trie_index([Patterns|MorePatterns],Results,Prefix,Clauses,Tail) :-
trie_step(Patterns,Prefix,Prefix,MorePatterns,Results,Clauses,Tail).
trie_step([],_,_,[],[],L,L) :- !.
% length MorePatterns == length Patterns == length Results
trie_step(Patterns,Symbol,Prefix,MorePatterns,Results,Clauses,T) :-
MorePatterns = [List|_],
length(List,N),
aggregate_all(set(F/A),
( member(Pattern,Patterns),
functor(Pattern,F,A)
),
FAs),
N1 is N + 1,
trie_step_cases(FAs,N1,Patterns,MorePatterns,Results,Symbol,Prefix,Clauses,T).
trie_step_cases([],_,_,_,_,_,_,Clauses,Clauses).
trie_step_cases([FA|FAs],N,Pattern,MorePatterns,Results,Symbol,Prefix,Clauses,Tail) :-
trie_step_case(FA,N,Pattern,MorePatterns,Results,Symbol,Prefix,Clauses,Clauses1),
trie_step_cases(FAs,N,Pattern,MorePatterns,Results,Symbol,Prefix,Clauses1,Tail).
trie_step_case(F/A,N,Patterns,MorePatterns,Results,Symbol,Prefix,[Clause|List],Tail) :-
Clause = (Head :- Body),
/* Head = Symbol(IndexPattern,V2,...,Vn,Result) */
N1 is N + 1,
functor(Head,Symbol,N1),
arg(1,Head,IndexPattern),
Head =.. [_,_|RestArgs],
once(append(Vs,[Result],RestArgs)),
/* IndexPattern = F() */
functor(IndexPattern,F,A),
IndexPattern =.. [_|Args],
append(Args,RestArgs,RecArgs),
( RecArgs == [Result] ->
/* nothing more to match on */
List = Tail,
Body = true,
rec_cases(Patterns,_,Results,F/A,_,_,MoreResults),
MoreResults = [Result]
; /* more things to match on */
rec_cases(Patterns,MorePatterns,Results,F/A,Cases,MoreCases,MoreResults),
( MoreCases = [OneMoreCase] ->
/* only one more thing to match on */
List = Tail,
Body = true,
append([Cases,OneMoreCase,MoreResults],RecArgs)
;
/* more than one thing to match on */
/* [ x1,..., xn]
[xs1,...,xsn]
*/
pairup(Cases,MoreCases,CasePairs),
common_pattern(CasePairs,CommonPatternPair,DiffVars,Differences),
append(Args,Vs,[First|Rest]),
First-Rest = CommonPatternPair,
% Body = RSymbol(DiffVars,Result)
fresh_symbol(Prefix,RSymbol),
append(DiffVars,[Result],RecCallVars),
Body =.. [RSymbol|RecCallVars],
maplist(head_tail,Differences,CHs,CTs),
trie_step(CHs,RSymbol,Prefix,CTs,MoreResults,List,Tail)
)
).
:- chr_constraint symbol_count/2.
:- chr_constraint fresh_symbol/2.
symbol_count(Atom,N), fresh_symbol(Atom,Symbol) <=>
atom_concat(Atom,N,Symbol),
M is N + 1,
symbol_count(Atom,M).
fresh_symbol(Atom,Symbol) ==>
symbol_count(Atom,0).
head_tail([H|T],H,T).
rec_cases([],[],[],_,[],[],[]).
rec_cases([Pattern|Patterns],[MorePattern|MorePatterns],[Result|Results],F/A,Cases,MoreCases,MoreResults) :-
( functor(Pattern,F,A), Pattern =.. [_|ArgPatterns], append(ArgPatterns,MorePattern,[Case|MoreCase]) ->
Cases = [Case|NCases],
MoreCases = [MoreCase|NMoreCases],
MoreResults = [Result|NMoreResults],
rec_cases(Patterns,MorePatterns,Results,F/A,NCases,NMoreCases,NMoreResults)
;
rec_cases(Patterns,MorePatterns,Results,F/A,Cases,MoreCases,MoreResults)
).
% }}}
%% common_pattern(+terms,-term,-vars,-differences) is det.
common_pattern(Ts,T,Vars,Differences) :-
fold1(chr_translate:gct,Ts,T),
term_variables(T,Vars),
findall(Vars,member(T,Ts),Differences).
gct(T1,T2,T) :-
gct_(T1,T2,T,[],_).
gct_(T1,T2,T,Dict0,Dict) :-
( nonvar(T1),
nonvar(T2),
functor(T1,F1,A1),
functor(T2,F2,A2),
F1 == F2,
A1 == A2 ->
functor(T,F1,A1),
T1 =.. [_|Args1],
T2 =.. [_|Args2],
T =.. [_|Args],
maplist_dcg(chr_translate:gct_,Args1,Args2,Args,Dict0,Dict)
;
/* T is a variable */
( lookup_eq(Dict0,T1+T2,T) ->
/* we already have a variable for this difference */
Dict = Dict0
;
/* T is a fresh variable */
Dict = [(T1+T2)-T|Dict0]
)
).
%-------------------------------------------------------------------------------
global_list_store_name(F/A,Name) :-
get_target_module(Mod),
atom_concat_list(['$chr_store_global_list_',Mod,'____',F,'___',A],Name).
global_ground_store_name(F/A,Name) :-
get_target_module(Mod),
atom_concat_list(['$chr_store_global_ground_',Mod,'____',F,'___',A],Name).
global_singleton_store_name(F/A,Name) :-
get_target_module(Mod),
atom_concat_list(['$chr_store_global_singleton_',Mod,'____',F,'___',A],Name).
identifier_store_name(TypeName,Name) :-
get_target_module(Mod),
atom_concat_list(['$chr_identifier_lookup_',Mod,'____',TypeName],Name).
:- chr_constraint prolog_global_variable/1.
:- chr_option(mode,prolog_global_variable(+)).
:- chr_constraint prolog_global_variables/1.
:- chr_option(mode,prolog_global_variables(-)).
prolog_global_variable(Name) \ prolog_global_variable(Name) <=> true.
prolog_global_variables(List), prolog_global_variable(Name) <=>
List = [Name|Tail],
prolog_global_variables(Tail).
prolog_global_variables(List) <=> List = [].
%% SWI begin
prolog_global_variables_code(Code) :-
prolog_global_variables(Names),
( Names == [] ->
Code = []
;
maplist(wrap_in_functor('$chr_prolog_global_variable'),Names,NameDeclarations),
Code = [(:- dynamic user:exception/3),
(:- multifile user:exception/3),
(user:exception(undefined_global_variable,Name,retry) :-
(
'$chr_prolog_global_variable'(Name),
'$chr_initialization'
)
)
|
NameDeclarations
]
).
%% SWI end
%% SICStus begin
% prolog_global_variables_code([]).
%% SICStus end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%sbag_member_call(S,L,sysh:mem(S,L)).
sbag_member_call(S,L,'chr sbag_member'(S,L)).
%sbag_member_call(S,L,member(S,L)).
update_mutable_call(A,B,'chr update_mutable'( A, B)).
%update_mutable_call(A,B,setarg(1, B, A)).
create_mutable_call(Value,Mutable,true) :- Mutable = mutable(Value).
% create_mutable_call(Value,Mutable,'chr create_mutable'(Value,Mutable)).
% get_suspension_field(Constraint,Susp,FieldName,Value,(Get0,Get1)) :-
% get_dynamic_suspension_term_field(FieldName,Constraint,Susp,Field,Get0),
% create_get_mutable(Value,Field,Get1).
%
% update_suspension_field(Constraint,Susp,FieldName,NewValue,(Get,Set)) :-
% get_dynamic_suspension_term_field(FieldName,Constraint,Susp,Field,Get),
% update_mutable_call(NewValue,Field,Set).
%
% get_update_suspension_field(Constraint,Susp,FieldName,Value,NewValue,Get0,Get1,Set) :-
% get_dynamic_suspension_term_field(FieldName,Constraint,Susp,Field,Get0),
% create_get_mutable_ref(Value,Field,Get1),
% update_mutable_call(NewValue,Field,Set).
%
% create_static_suspension_field(Constraint,Susp,FieldName,Value,Create) :-
% get_static_suspension_term_field(FieldName,Constraint,Susp,Field),
% create_mutable_call(Value,Field,Create).
%
% get_static_suspension_field(Constraint,Susp,FieldName,Value,Get) :-
% get_static_suspension_term_field(FieldName,Constraint,Susp,Field),
% create_get_mutable(Value,Field,Get).
%
% get_update_static_suspension_field(Constraint,Susp,SuspTerm,FieldName,Value,NewValue,Get,Set) :-
% get_static_suspension_term_field(FieldName,Constraint,SuspTerm,Field),
% create_get_mutable_ref(Value,Field,Get),
% update_mutable_call(NewValue,Field,Set).
get_suspension_field(Constraint,Susp,FieldName,Value,Get) :-
get_dynamic_suspension_term_field(FieldName,Constraint,Susp,Value,Get).
update_suspension_field(Constraint,Susp,FieldName,NewValue,Set) :-
set_dynamic_suspension_term_field(FieldName,Constraint,Susp,NewValue,Set).
get_update_suspension_field(Constraint,Susp,FieldName,Value,NewValue,true,Get,Set) :-
get_dynamic_suspension_term_field(FieldName,Constraint,Susp,Value,Get),
set_dynamic_suspension_term_field(FieldName,Constraint,Susp,NewValue,Set).
create_static_suspension_field(Constraint,Susp,FieldName,Value,true) :-
get_static_suspension_term_field(FieldName,Constraint,Susp,Value).
get_static_suspension_field(Constraint,Susp,FieldName,Value,true) :-
get_static_suspension_term_field(FieldName,Constraint,Susp,Value).
get_update_static_suspension_field(Constraint,Susp,SuspTerm,FieldName,Value,NewValue,true,Set) :-
get_static_suspension_term_field(FieldName,Constraint,SuspTerm,Value),
set_dynamic_suspension_term_field(FieldName,Constraint,Susp,NewValue,Set).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
enumerate_stores_code(Constraints,[Clause|List]) :-
Head = '$enumerate_constraints'(Constraint),
Clause = ( Head :- Body),
enumerate_store_bodies(Constraints,Constraint,List),
( List = [] ->
Body = fail
;
Body = ( nonvar(Constraint) ->
functor(Constraint,Functor,_),
'$enumerate_constraints'(Functor,Constraint)
;
'$enumerate_constraints'(_,Constraint)
)
).
enumerate_store_bodies([],_,[]).
enumerate_store_bodies([C|Cs],Constraint,L) :-
( is_stored(C) ->
get_store_type(C,StoreType),
( enumerate_store_body(StoreType,C,Suspension,SuspensionBody) ->
true
;
chr_error(internal,'Could not generate enumeration code for constraint ~w.\n',[C])
),
get_dynamic_suspension_term_field(arguments,C,Suspension,Arguments,DynamicGoal),
C = F/_,
Constraint0 =.. [F|Arguments],
Head = '$enumerate_constraints'(F,Constraint),
Body = (SuspensionBody, DynamicGoal, Constraint = Constraint0),
L = [(Head :- Body)|T]
;
L = T
),
enumerate_store_bodies(Cs,Constraint,T).
enumerate_store_body(default,C,Susp,Body) :-
global_list_store_name(C,StoreName),
sbag_member_call(Susp,List,Sbag),
make_get_store_goal(StoreName,List,GetStoreGoal),
Body =
(
GetStoreGoal, % nb_getval(StoreName,List),
Sbag
).
% get_constraint_index(C,Index),
% get_target_module(Mod),
% get_max_constraint_index(MaxIndex),
% Body1 =
% (
% 'chr default_store'(GlobalStore),
% get_attr(GlobalStore,Mod,Attr)
% ),
% ( MaxIndex > 1 ->
% NIndex is Index + 1,
% sbag_member_call(Susp,List,Sbag),
% Body2 =
% (
% arg(NIndex,Attr,List),
% Sbag
% )
% ;
% sbag_member_call(Susp,Attr,Sbag),
% Body2 = Sbag
% ),
% Body = (Body1,Body2).
enumerate_store_body(multi_inthash([Index|_]),C,Susp,Body) :-
multi_inthash_enumerate_store_body(Index,C,Susp,Body).
enumerate_store_body(multi_hash([Index|_]),C,Susp,Body) :-
multi_hash_enumerate_store_body(Index,C,Susp,Body).
enumerate_store_body(atomic_constants(Index,Constants,Completeness),C,Susp,Body) :-
Completeness == complete, % fail if incomplete
maplist(enumerate_constant_store_body(C,Index,Susps),Constants,Disjuncts),
list2disj(Disjuncts, Disjunction),
Body = ( Disjunction, member(Susp,Susps) ).
enumerate_constant_store_body(C,Index,Susps,Constant,nb_getval(StoreName,Susps)) :-
constants_store_name(C,Index,Constant,StoreName).
enumerate_store_body(ground_constants(Index,Constants,Completeness),C,Susp,Body) :-
enumerate_store_body(atomic_constants(Index,Constants,Completeness),C,Susp,Body).
enumerate_store_body(global_ground,C,Susp,Body) :-
global_ground_store_name(C,StoreName),
sbag_member_call(Susp,List,Sbag),
make_get_store_goal(StoreName,List,GetStoreGoal),
Body =
(
GetStoreGoal, % nb_getval(StoreName,List),
Sbag
).
enumerate_store_body(var_assoc_store(_,_),C,_,Body) :-
Body = fail.
enumerate_store_body(global_singleton,C,Susp,Body) :-
global_singleton_store_name(C,StoreName),
make_get_store_goal(StoreName,Susp,GetStoreGoal),
Body =
(
GetStoreGoal, % nb_getval(StoreName,Susp),
Susp \== []
).
enumerate_store_body(multi_store(STs),C,Susp,Body) :-
( memberchk(global_ground,STs) ->
enumerate_store_body(global_ground,C,Susp,Body)
;
once((
member(ST,STs),
enumerate_store_body(ST,C,Susp,Body)
))
).
enumerate_store_body(identifier_store(Index),C,Susp,Body) :-
Body = fail.
enumerate_store_body(type_indexed_identifier_store(Index,IndexType),C,Susp,Body) :-
Body = fail.
multi_inthash_enumerate_store_body(I,C,Susp,B) :-
multi_hash_store_name(C,I,StoreName),
B =
(
nb_getval(StoreName,HT),
value_iht(HT,Susp)
).
multi_hash_enumerate_store_body(I,C,Susp,B) :-
multi_hash_store_name(C,I,StoreName),
make_get_store_goal(StoreName,HT,GetStoreGoal),
B =
(
GetStoreGoal, % nb_getval(StoreName,HT),
value_ht(HT,Susp)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% BACKGROUND INFORMATION (declared using :- chr_declaration)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
background_info/1,
background_info/2,
get_bg_info/1,
get_bg_info/2,
get_bg_info_answer/1.
background_info(X), background_info(Y) <=>
append(X,Y,XY), background_info(XY).
background_info(X) \ get_bg_info(Q) <=> Q=X.
get_bg_info(Q) <=> Q = [].
background_info(T,I), get_bg_info(A,Q) ==>
copy_term_nat(T,T1),
subsumes_chk(T1,A)
|
copy_term_nat(T-I,A-X),
get_bg_info_answer([X]).
get_bg_info_answer(X), get_bg_info_answer(Y) <=>
append(X,Y,XY), get_bg_info_answer(XY).
get_bg_info_answer(X) # Id, get_bg_info(A,Q) <=> Q=X pragma passive(Id).
get_bg_info(_,Q) <=> Q=[]. % no info found on this term
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
prev_guard_list/8,
prev_guard_list/6,
simplify_guards/1,
set_all_passive/1.
:- chr_option(mode,prev_guard_list(+,+,+,+,+,+,+,+)).
:- chr_option(mode,prev_guard_list(+,+,+,+,+,+)).
:- chr_option(type_declaration,prev_guard_list(any,any,any,any,any,list)).
:- chr_option(mode,simplify_guards(+)).
:- chr_option(mode,set_all_passive(+)).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% GUARD SIMPLIFICATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% If the negation of the guards of earlier rules entails (part of)
% the current guard, the current guard can be simplified. We can only
% use earlier rules with a head that matches if the head of the current
% rule does, and which make it impossible for the current rule to match
% if they fire (i.e. they shouldn't be propagation rules and their
% head constraints must be subsets of those of the current rule).
% At this point, we know for sure that the negation of the guard
% of such a rule has to be true (otherwise the earlier rule would have
% fired, because of the refined operational semantics), so we can use
% that information to simplify the guard by replacing all entailed
% conditions by true/0. As a consequence, the never-stored analysis
% (in a further phase) will detect more cases of never-stored constraints.
%
% e.g. c(X),d(Y) <=> X > 0 | ...
% e(X) <=> X < 0 | ...
% c(X) \ d(Y),e(Z) <=> X =< 0, Z >= 0, ... | ...
% \____________/
% true
guard_simplification :-
( chr_pp_flag(guard_simplification,on) ->
precompute_head_matchings,
simplify_guards(1)
;
true
).
% for every rule, we create a prev_guard_list where the last argument
% eventually is a list of the negations of earlier guards
rule(RuleNb,Rule) \ simplify_guards(RuleNb)
<=>
Rule = pragma(rule(Head1,Head2,Guard,_B),ids(IDs1,IDs2),_Pragmas,_Name,RuleNb),
append(Head1,Head2,Heads),
make_head_matchings_explicit_not_negated(Heads,MatchingFreeHeads,Matchings),
tree_set_empty(Done),
multiple_occ_constraints_checked(Done),
apply_guard_wrt_term(Heads,Guard,SubstitutedHeads),
append(IDs1,IDs2,IDs),
findall(tuple(C,O,RuleNb)-(-RuleNb),(member(ID,IDs),get_occurrence_from_id(C,O,RuleNb,ID)),HeapData),
empty_q(EmptyHeap),
insert_list_q(HeapData,EmptyHeap,Heap),
next_prev_rule(Heap,_,Heap1),
next_prev_rule(Heap1,PrevRuleNb,NHeap),
prev_guard_list(RuleNb,PrevRuleNb,NHeap,MatchingFreeHeads,Guard,[],Matchings,[SubstitutedHeads]),
NextRule is RuleNb+1,
simplify_guards(NextRule).
next_prev_rule(Heap,RuleNb,NHeap) :-
( find_min_q(Heap,_-Priority) ->
Priority = (-RuleNb),
normalize_heap(Heap,Priority,NHeap)
;
RuleNb = 0,
NHeap = Heap
).
normalize_heap(Heap,Priority,NHeap) :-
( find_min_q(Heap,_-Priority) ->
delete_min_q(Heap,Heap1,tuple(C,O,_)-_),
( O > 1 ->
NO is O -1,
get_occurrence(C,NO,RuleNb,_),
insert_q(Heap1,tuple(C,NO,RuleNb)-(-RuleNb),Heap2)
;
Heap2 = Heap1
),
normalize_heap(Heap2,Priority,NHeap)
;
NHeap = Heap
).
% no more rule
simplify_guards(_)
<=>
true.
% The negation of the guard of a non-propagation rule is added
% if its kept head constraints are a subset of the kept constraints of
% the rule we're working on, and its removed head constraints (at least one)
% are a subset of the removed constraints.
rule(PrevRuleNb,PrevRule) \ prev_guard_list(RuleNb,PrevRuleNb,Heap,CurrentHeads,G,GuardList,Matchings,GH)
<=>
PrevRule = pragma(rule(H1,H2,PrevGuard,_B),_Ids,_Pragmas,_Name,_PrevRuleNb), % PrevRuleNb == _PrevRuleNb
H1 \== [],
make_head_matchings_explicit(PrevRuleNb,MatchingFreeHeads,PrevMatchings),
setof(Renaming,chr_translate:head_subset(MatchingFreeHeads,CurrentHeads,Renaming),Renamings)
|
append(H1,H2,Heads),
compute_derived_info(Renamings,PrevMatchings,MatchingFreeHeads,Heads,PrevGuard,Matchings,CurrentHeads,GH,DerivedInfo,GH_New1),
append(GuardList,DerivedInfo,GL1),
normalize_conj_list(GL1,GL),
append(GH_New1,GH,GH1),
normalize_conj_list(GH1,GH_New),
next_prev_rule(Heap,PrevPrevRuleNb,NHeap),
% PrevPrevRuleNb is PrevRuleNb-1,
prev_guard_list(RuleNb,PrevPrevRuleNb,NHeap,CurrentHeads,G,GL,Matchings,GH_New).
% if this isn't the case, we skip this one and try the next rule
prev_guard_list(RuleNb,N,Heap,H,G,GuardList,M,GH)
<=>
( N > 0 ->
next_prev_rule(Heap,N1,NHeap),
% N1 is N-1,
prev_guard_list(RuleNb,N1,NHeap,H,G,GuardList,M,GH)
;
prev_guard_list(RuleNb,H,G,GuardList,M,GH)
).
prev_guard_list(RuleNb,H,G,GuardList,M,GH)
<=>
GH \== []
|
head_types_modes_condition(GH,H,TypeInfo),
conj2list(TypeInfo,TI),
term_variables(H,HeadVars),
append([chr_pp_headvariables(HeadVars)|TI],GuardList,Info),
normalize_conj_list(Info,InfoL),
append(H,InfoL,RelevantTerms),
add_background_info([G|RelevantTerms],BGInfo),
append(InfoL,BGInfo,AllInfo_),
normalize_conj_list(AllInfo_,AllInfo),
prev_guard_list(RuleNb,H,G,AllInfo,M,[]).
head_types_modes_condition([],H,true).
head_types_modes_condition([GH|GHs],H,(TI1, TI2)) :-
types_modes_condition(H,GH,TI1),
head_types_modes_condition(GHs,H,TI2).
add_background_info(Term,Info) :-
get_bg_info(GeneralInfo),
add_background_info2(Term,TermInfo),
append(GeneralInfo,TermInfo,Info).
add_background_info2(X,[]) :- var(X), !.
add_background_info2([],[]) :- !.
add_background_info2([X|Xs],Info) :- !,
add_background_info2(X,Info1),
add_background_info2(Xs,Infos),
append(Info1,Infos,Info).
add_background_info2(X,Info) :-
(functor(X,_,A), A>0 ->
X =.. [_|XArgs],
add_background_info2(XArgs,XArgInfo)
;
XArgInfo = []
),
get_bg_info(X,XInfo),
append(XInfo,XArgInfo,Info).
%%
% when all earlier guards are added or skipped, we simplify the guard.
% if it's different from the original one, we change the rule
prev_guard_list(RuleNb,H,G,GuardList,M,[]), rule(RuleNb,Rule)
<=>
Rule = pragma(rule(Head1,Head2,G,B),Ids,Pragmas,Name,RuleNb),
G \== true, % let's not try to simplify this ;)
append(M,GuardList,Info),
(% if guard + context is a contradiction, it should be simplified to "fail"
conj2list(G,GL), append(Info,GL,GuardWithContext),
guard_entailment:entails_guard(GuardWithContext,fail) ->
SimpleGuard = fail
;
% otherwise we try to remove redundant conjuncts
simplify_guard(G,B,Info,SimpleGuard,NB)
),
G \== SimpleGuard % only do this if we can change the guard
|
rule(RuleNb,pragma(rule(Head1,Head2,SimpleGuard,NB),Ids,Pragmas,Name,RuleNb)),
prev_guard_list(RuleNb,H,SimpleGuard,GuardList,M,[]).
%% normalize_conj_list(+List,-NormalList) is det.
%
% Removes =true= elements and flattens out conjunctions.
normalize_conj_list(List,NormalList) :-
list2conj(List,Conj),
conj2list(Conj,NormalList).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% AUXILIARY PREDICATES (GUARD SIMPLIFICATION)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
compute_derived_info([],_PrevMatchings,_MatchingFreeHeads,_Heads,_PrevGuard,_Matchings,_H,_GH,[],[]).
compute_derived_info([Renaming1|RestRenamings],PrevMatchings,PrevMatchingFreeHeads,PrevHeads,PrevGuard,Matchings,H,GH,[DerivedInfo1|DerivedInfo2],[GH3|GH_New2]) :-
copy_term(PrevMatchings-PrevGuard,FreshMatchings),
variable_replacement(PrevMatchings-PrevGuard,FreshMatchings,ExtraRenaming),
append(Renaming1,ExtraRenaming,Renaming2),
list2conj(PrevMatchings,Match),
negate_b(Match,HeadsDontMatch),
make_head_matchings_explicit_not_negated2(PrevHeads,PrevMatchingFreeHeads,HeadsMatch),
list2conj(HeadsMatch,HeadsMatchBut),
term_variables(Renaming2,RenVars),
term_variables(PrevMatchings-PrevGuard-HeadsMatch,MGVars),
new_vars(MGVars,RenVars,ExtraRenaming2),
append(Renaming2,ExtraRenaming2,Renaming),
( PrevGuard == true -> % true can't fail
Info_ = HeadsDontMatch
;
negate_b(PrevGuard,TheGuardFailed),
Info_ = (HeadsDontMatch ; (HeadsMatchBut, TheGuardFailed))
),
copy_with_variable_replacement(Info_,DerivedInfo1,Renaming),
copy_with_variable_replacement(PrevGuard,RenamedG2,Renaming),
copy_with_variable_replacement(PrevMatchings,RenamedMatchings_,Renaming),
list2conj(RenamedMatchings_,RenamedMatchings),
apply_guard_wrt_term(H,RenamedG2,GH2),
apply_guard_wrt_term(GH2,RenamedMatchings,GH3),
compute_derived_info(RestRenamings,PrevMatchings,PrevMatchingFreeHeads,PrevHeads,PrevGuard,Matchings,H,GH,DerivedInfo2,GH_New2).
simplify_guard(G,B,Info,SG,NB) :-
conj2list(G,LG),
% writeq(guard_entailment:simplify_guards(Info,B,LG,SGL,NB)),nl,
guard_entailment:simplify_guards(Info,B,LG,SGL,NB),
list2conj(SGL,SG).
new_vars([],_,[]).
new_vars([A|As],RV,ER) :-
( memberchk_eq(A,RV) ->
new_vars(As,RV,ER)
;
ER = [A-NewA,NewA-A|ER2],
new_vars(As,RV,ER2)
).
%% head_subset(+Subset,+MultiSet,-Renaming) is nondet.
%
% check if a list of constraints is a subset of another list of constraints
% (multiset-subset), meanwhile computing a variable renaming to convert
% one into the other.
head_subset(H,Head,Renaming) :-
head_subset(H,Head,Renaming,[],_).
head_subset([],Remainder,Renaming,Renaming,Remainder).
head_subset([X|Xs],MultiSet,Renaming,Acc,Remainder) :-
head_member(MultiSet,X,NAcc,Acc,Remainder1),
head_subset(Xs,Remainder1,Renaming,NAcc,Remainder).
% check if A is in the list, remove it from Headleft
head_member([X|Xs],A,Renaming,Acc,Remainder) :-
( variable_replacement(A,X,Acc,Renaming),
Remainder = Xs
;
Remainder = [X|RRemainder],
head_member(Xs,A,Renaming,Acc,RRemainder)
).
%-------------------------------------------------------------------------------%
% memoing code to speed up repeated computation
:- chr_constraint precompute_head_matchings/0.
rule(RuleNb,PragmaRule), precompute_head_matchings ==>
PragmaRule = pragma(rule(H1,H2,_G,_B),_Ids,_Pragmas,_Name,_PrevRuleNb),
append(H1,H2,Heads),
make_head_matchings_explicit_(Heads,MatchingFreeHeads,Matchings),
copy_term_nat(MatchingFreeHeads-Matchings,A-B),
make_head_matchings_explicit_memo_table(RuleNb,A,B).
precompute_head_matchings <=> true.
:- chr_constraint make_head_matchings_explicit_memo_table/3.
:- chr_constraint make_head_matchings_explicit_memo_lookup/3.
:- chr_option(mode,make_head_matchings_explicit_memo_table(+,?,?)).
:- chr_option(mode,make_head_matchings_explicit_memo_lookup(+,?,?)).
make_head_matchings_explicit_memo_table(RuleNb,NHeads,Matchings) \
make_head_matchings_explicit_memo_lookup(RuleNb,Q1,Q2)
<=>
Q1 = NHeads,
Q2 = Matchings.
make_head_matchings_explicit_memo_lookup(_,_,_) <=> fail.
make_head_matchings_explicit(RuleNb,MatchingFreeHeads,Matchings) :-
make_head_matchings_explicit_memo_lookup(RuleNb,A,B),
copy_term_nat(A-B,MatchingFreeHeads-Matchings).
%-------------------------------------------------------------------------------%
make_head_matchings_explicit_(Heads,MatchingFreeHeads,Matchings) :-
extract_arguments(Heads,Arguments),
make_matchings_explicit(Arguments,FreeVariables,[],[],_,Matchings),
substitute_arguments(Heads,FreeVariables,MatchingFreeHeads).
make_head_matchings_explicit_not_negated(Heads,MatchingFreeHeads,Matchings) :-
extract_arguments(Heads,Arguments),
make_matchings_explicit_not_negated(Arguments,FreshVariables,Matchings),
substitute_arguments(Heads,FreshVariables,MatchingFreeHeads).
make_head_matchings_explicit_not_negated2(Heads,MatchingFreeHeads,Matchings) :-
extract_arguments(Heads,Arguments1),
extract_arguments(MatchingFreeHeads,Arguments2),
make_matchings_explicit_not_negated(Arguments1,Arguments2,Matchings).
%% extract_arguments(+ListOfConstraints,-ListOfVariables) is det.
%
% Returns list of arguments of given list of constraints.
extract_arguments([],[]).
extract_arguments([Constraint|Constraints],AllArguments) :-
Constraint =.. [_|Arguments],
append(Arguments,RestArguments,AllArguments),
extract_arguments(Constraints,RestArguments).
%% substitute_arguments(+InListOfConstraints,ListOfVariables,-OutListOfConstraints) is det.
%
% Substitutes arguments of constraints with those in the given list.
substitute_arguments([],[],[]).
substitute_arguments([Constraint|Constraints],Variables,[NConstraint|NConstraints]) :-
functor(Constraint,F,N),
split_at(N,Variables,Arguments,RestVariables),
NConstraint =.. [F|Arguments],
substitute_arguments(Constraints,RestVariables,NConstraints).
make_matchings_explicit([],[],_,MC,MC,[]).
make_matchings_explicit([Arg|Args],[NewVar|NewVars],VarAcc,MatchingCondition,MatchingConditionO,Matchings) :-
( var(Arg) ->
( memberchk_eq(Arg,VarAcc) ->
list2disj(MatchingCondition,MatchingCondition_disj),
Matchings = [(MatchingCondition_disj ; NewVar == Arg)|RestMatchings], % or only = ??
NVarAcc = VarAcc
;
Matchings = RestMatchings,
NewVar = Arg,
NVarAcc = [Arg|VarAcc]
),
MatchingCondition2 = MatchingCondition
;
functor(Arg,F,A),
Arg =.. [F|RecArgs],
make_matchings_explicit(RecArgs,RecVars,VarAcc,MatchingCondition,MatchingCondition_,RecMatchings),
FlatArg =.. [F|RecVars],
( RecMatchings == [] ->
Matchings = [functor(NewVar,F,A)|RestMatchings]
;
list2conj(RecMatchings,ArgM_conj),
list2disj(MatchingCondition,MatchingCondition_disj),
ArgM_ = (NewVar \= FlatArg ; MatchingCondition_disj ; ArgM_conj),
Matchings = [ functor(NewVar,F,A) , ArgM_|RestMatchings]
),
MatchingCondition2 = [ NewVar \= FlatArg |MatchingCondition_],
term_variables(Args,ArgVars),
append(ArgVars,VarAcc,NVarAcc)
),
make_matchings_explicit(Args,NewVars,NVarAcc,MatchingCondition2,MatchingConditionO,RestMatchings).
%% make_matchings_explicit_not_negated(+ListOfTerms,-ListOfVariables,-ListOfMatchings) is det.
%
% Returns list of new variables and list of pairwise unifications between given list and variables.
make_matchings_explicit_not_negated([],[],[]).
make_matchings_explicit_not_negated([X|Xs],[Var|Vars],Matchings) :-
Matchings = [Var = X|RMatchings],
make_matchings_explicit_not_negated(Xs,Vars,RMatchings).
%% apply_guard_wrt_term(+ListOfConstraints,+Goal,-NewListOfConstraints) is det.
%
% (Partially) applies substitutions of =Goal= to given list.
apply_guard_wrt_term([],_Guard,[]).
apply_guard_wrt_term([Term|RH],Guard,[NTerm|RGH]) :-
( var(Term) ->
apply_guard_wrt_variable(Guard,Term,NTerm)
;
Term =.. [F|HArgs],
apply_guard_wrt_term(HArgs,Guard,NewHArgs),
NTerm =.. [F|NewHArgs]
),
apply_guard_wrt_term(RH,Guard,RGH).
%% apply_guard_wrt_variable(+Goal,+Variable,-NVariable) is det.
%
% (Partially) applies goal =Guard= wrt variable.
apply_guard_wrt_variable((Guard1,Guard2),Variable,NVariable) :- !,
apply_guard_wrt_variable(Guard1,Variable,NVariable1),
apply_guard_wrt_variable(Guard2,NVariable1,NVariable).
apply_guard_wrt_variable(Guard,Variable,NVariable) :-
( Guard = (X = Y), Variable == X ->
NVariable = Y
; Guard = functor(AVariable,Functor,Arity), Variable == AVariable, ground(Functor), ground(Arity) ->
functor(NVariable,Functor,Arity)
;
NVariable = Variable
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% ALWAYS FAILING GUARDS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
prev_guard_list(RuleNb,H,G,GuardList,M,[]),rule(RuleNb,Rule)
==>
chr_pp_flag(check_impossible_rules,on),
Rule = pragma(rule(_,_,G,_),_Ids,_Pragmas,_Name,RuleNb),
conj2list(G,GL),
append(M,GuardList,Info),
append(Info,GL,GuardWithContext),
guard_entailment:entails_guard(GuardWithContext,fail)
|
chr_warning(weird_program,'Heads will never match or guard will always fail in ~@.\n\tThis rule will never fire!\n',[format_rule(Rule)]),
set_all_passive(RuleNb).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% HEAD SIMPLIFICATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% now we check the head matchings (guard may have been simplified meanwhile)
prev_guard_list(RuleNb,H,G,GuardList,M,[]) \ rule(RuleNb,Rule)
<=>
Rule = pragma(rule(Head1,Head2,G,B),Ids,Pragmas,Name,RuleNb),
simplify_heads(M,GuardList,G,B,NewM,NewB),
NewM \== [],
extract_arguments(Head1,VH1),
extract_arguments(Head2,VH2),
extract_arguments(H,VH),
replace_some_heads(VH1,VH2,VH,NewM,H1,H2,G,B,NewB_),
substitute_arguments(Head1,H1,NewH1),
substitute_arguments(Head2,H2,NewH2),
append(NewB,NewB_,NewBody),
list2conj(NewBody,BodyMatchings),
NewRule = pragma(rule(NewH1,NewH2,G,(BodyMatchings,B)),Ids,Pragmas,Name,RuleNb),
(Head1 \== NewH1 ; Head2 \== NewH2 )
|
rule(RuleNb,NewRule).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% AUXILIARY PREDICATES (HEAD SIMPLIFICATION)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
replace_some_heads(H1,H2,NH,[],H1,H2,G,Body,[]) :- !.
replace_some_heads([],[H2|RH2],[NH|RNH],[M|RM],[],[H2_|RH2_],G,Body,NewB) :- !,
( NH == M ->
H2_ = M,
replace_some_heads([],RH2,RNH,RM,[],RH2_,G,Body,NewB)
;
(M = functor(X,F,A), NH == X ->
length(A_args,A),
(var(H2) ->
NewB1 = [],
H2_ =.. [F|A_args]
;
H2 =.. [F|OrigArgs],
use_same_args(OrigArgs,A_args,A_args_,G,Body,NewB1),
H2_ =.. [F|A_args_]
),
replace_some_heads([],RH2,RNH,RM,[],RH2_,G,Body,NewB2),
append(NewB1,NewB2,NewB)
;
H2_ = H2,
replace_some_heads([],RH2,RNH,[M|RM],[],RH2_,G,Body,NewB)
)
).
replace_some_heads([H1|RH1],H2,[NH|RNH],[M|RM],[H1_|RH1_],H2_,G,Body,NewB) :- !,
( NH == M ->
H1_ = M,
replace_some_heads(RH1,H2,RNH,RM,RH1_,H2_,G,Body,NewB)
;
(M = functor(X,F,A), NH == X ->
length(A_args,A),
(var(H1) ->
NewB1 = [],
H1_ =.. [F|A_args]
;
H1 =.. [F|OrigArgs],
use_same_args(OrigArgs,A_args,A_args_,G,Body,NewB1),
H1_ =.. [F|A_args_]
),
replace_some_heads(RH1,H2,RNH,RM,RH1_,H2_,G,Body,NewB2),
append(NewB1,NewB2,NewB)
;
H1_ = H1,
replace_some_heads(RH1,H2,RNH,[M|RM],RH1_,H2_,G,Body,NewB)
)
).
use_same_args([],[],[],_,_,[]).
use_same_args([OA|ROA],[NA|RNA],[Out|ROut],G,Body,NewB) :-
var(OA),!,
Out = OA,
use_same_args(ROA,RNA,ROut,G,Body,NewB).
use_same_args([OA|ROA],[NA|RNA],[Out|ROut],G,Body,NewB) :-
nonvar(OA),!,
( common_variables(OA,Body) ->
NewB = [NA = OA|NextB]
;
NewB = NextB
),
Out = NA,
use_same_args(ROA,RNA,ROut,G,Body,NextB).
simplify_heads([],_GuardList,_G,_Body,[],[]).
simplify_heads([M|RM],GuardList,G,Body,NewM,NewB) :-
M = (A = B),
( (nonvar(B) ; common_variables(B,RM-GuardList)),
guard_entailment:entails_guard(GuardList,(A=B)) ->
( common_variables(B,G-RM-GuardList) ->
NewB = NextB,
NewM = NextM
;
( common_variables(B,Body) ->
NewB = [A = B|NextB]
;
NewB = NextB
),
NewM = [A|NextM]
)
;
( nonvar(B), functor(B,BFu,BAr),
guard_entailment:entails_guard([functor(A,BFu,BAr)|GuardList],(A=B)) ->
NewB = NextB,
( common_variables(B,G-RM-GuardList) ->
NewM = NextM
;
NewM = [functor(A,BFu,BAr)|NextM]
)
;
NewM = NextM,
NewB = NextB
)
),
simplify_heads(RM,[M|GuardList],G,Body,NextM,NextB).
common_variables(B,G) :-
term_variables(B,BVars),
term_variables(G,GVars),
intersect_eq(BVars,GVars,L),
L \== [].
set_all_passive(RuleNb), occurrence(_,_,RuleNb,ID,_) ==> passive(RuleNb,ID).
set_all_passive(_) <=> true.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% OCCURRENCE SUBSUMPTION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
first_occ_in_rule/4,
next_occ_in_rule/6.
:- chr_option(mode,first_occ_in_rule(+,+,+,+)).
:- chr_option(mode,next_occ_in_rule(+,+,+,+,+,+)).
:- chr_constraint multiple_occ_constraints_checked/1.
:- chr_option(mode,multiple_occ_constraints_checked(+)).
prev_guard_list(RuleNb,H,G,GuardList,M,[]),
occurrence(C,O,RuleNb,ID,_),
occurrence(C,O2,RuleNb,ID2,_),
rule(RuleNb,Rule)
\
multiple_occ_constraints_checked(Done)
<=>
O < O2,
chr_pp_flag(occurrence_subsumption,on),
Rule = pragma(rule(H1,H2,_G,_B),_Ids,_Pragmas,_Name,_RuleNb), % RuleNb == _RuleNb
H1 \== [],
\+ tree_set_memberchk(C,Done)
|
first_occ_in_rule(RuleNb,C,O,ID),
tree_set_add(Done,C,NDone),
multiple_occ_constraints_checked(NDone).
% Find first occurrence of constraint =C= in rule =RuleNb=
occurrence(C,O,RuleNb,ID,_) \ first_occ_in_rule(RuleNb,C,O2,_)
<=>
O < O2
|
first_occ_in_rule(RuleNb,C,O,ID).
first_occ_in_rule(RuleNb,C,O,ID_o1)
<=>
C = F/A,
functor(FreshHead,F,A),
next_occ_in_rule(RuleNb,C,O,ID_o1,[],FreshHead).
% Skip passive occurrences.
passive(RuleNb,ID_o2), occurrence(C,O2,RuleNb,ID_o2,_) \ next_occ_in_rule(RuleNb,C,O,ID_o1,Cond,FH)
<=>
O2 is O+1
|
next_occ_in_rule(RuleNb,C,O2,ID_o1,NewCond,FH).
prev_guard_list(RuleNb,H,G,GuardList,M,[]), occurrence(C,O2,RuleNb,ID_o2,_), rule(RuleNb,Rule) \ next_occ_in_rule(RuleNb,C,O,ID_o1,Cond,FH)
<=>
O2 is O+1,
Rule = pragma(rule(H1,H2,G,B),ids(ID1,ID2),_Pragmas,_Name,RuleNb)
|
append(H1,H2,Heads),
add_failing_occ(Rule,Heads,H,ID_o1,ExtraCond,FH,M,C,Repl),
( ExtraCond == [chr_pp_void_info] ->
next_occ_in_rule(RuleNb,C,O2,ID_o2,Cond,FH)
;
append(ExtraCond,Cond,NewCond),
add_failing_occ(Rule,Heads,H,ID_o2,CheckCond,FH,M,C,Repl2),
copy_term(GuardList,FGuardList),
variable_replacement(GuardList,FGuardList,GLRepl),
copy_with_variable_replacement(GuardList,GuardList2,Repl),
copy_with_variable_replacement(GuardList,GuardList3_,Repl2),
copy_with_variable_replacement(GuardList3_,GuardList3,GLRepl),
append(NewCond,GuardList2,BigCond),
append(BigCond,GuardList3,BigCond2),
copy_with_variable_replacement(M,M2,Repl),
copy_with_variable_replacement(M,M3,Repl2),
append(M3,BigCond2,BigCond3),
append([chr_pp_active_constraint(FH)|M2],BigCond3,Info),
list2conj(CheckCond,OccSubsum),
copy_term((NewCond,BigCond2,Info,OccSubsum,FH),(NewCond2,BigCond2_,Info2,OccSubsum2,FH2)),
( OccSubsum \= chr_pp_void_info ->
( guard_entailment:entails_guard(Info2,OccSubsum2) ->
passive(RuleNb,ID_o2)
;
true
)
;
true
),!,
next_occ_in_rule(RuleNb,C,O2,ID_o2,NewCond,FH)
).
next_occ_in_rule(RuleNb,C,O,ID,Cond,Args)
<=>
true.
prev_guard_list(RuleNb,H,G,GuardList,M,[]), multiple_occ_constraints_checked(Done)
<=>
true.
add_failing_occ(Rule,Heads,NH,ID_o1,FailCond,FH,M,C,Repl) :-
Rule = pragma(rule(H1,H2,G,B),ids(ID1,ID2),_Pragmas,_Name,RuleNb),
append(ID2,ID1,IDs),
missing_partner_cond(Heads,NH,IDs,ID_o1,MPCond,H,C),
copy_term((H,Heads,NH),(FH2,FHeads,NH2)),
variable_replacement((H,Heads,NH),(FH2,FHeads,NH2),Repl),
copy_with_variable_replacement(G,FG,Repl),
extract_explicit_matchings(FG,FG2),
negate_b(FG2,NotFG),
copy_with_variable_replacement(MPCond,FMPCond,Repl),
( subsumes(FH,FH2) ->
FailCond = [(NotFG;FMPCond)]
;
% in this case, not much can be done
% e.g. c(f(...)), c(g(...)) <=> ...
FailCond = [chr_pp_void_info]
).
missing_partner_cond([],[],[],ID_o1,fail,H2,C).
missing_partner_cond([H|Hs],[H2|H2s],[ID_o1|IDs],ID_o1,Cond,H,C) :- !,
missing_partner_cond(Hs,H2s,IDs,ID_o1,Cond,H,C).
missing_partner_cond([H|Hs],[NH|NHs],[ID|IDs],ID_o1,Cond,H2,F/A) :-
Cond = (chr_pp_not_in_store(H);Cond1),
missing_partner_cond(Hs,NHs,IDs,ID_o1,Cond1,H2,F/A).
extract_explicit_matchings((A,B),D) :- !,
( extract_explicit_matchings(A) ->
extract_explicit_matchings(B,D)
;
D = (A,E),
extract_explicit_matchings(B,E)
).
extract_explicit_matchings(A,D) :- !,
( extract_explicit_matchings(A) ->
D = true
;
D = A
).
extract_explicit_matchings(A=B) :-
var(A), var(B), !, A=B.
extract_explicit_matchings(A==B) :-
var(A), var(B), !, A=B.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% TYPE INFORMATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
type_definition/2,
type_alias/2,
constraint_type/2,
get_type_definition/2,
get_constraint_type/2.
:- chr_option(mode,type_definition(?,?)).
:- chr_option(mode,get_type_definition(?,?)).
:- chr_option(mode,type_alias(?,?)).
:- chr_option(mode,constraint_type(+,+)).
:- chr_option(mode,get_constraint_type(+,-)).
assert_constraint_type(Constraint,ArgTypes) :-
( ground(ArgTypes) ->
constraint_type(Constraint,ArgTypes)
;
chr_error(type_error,'Declared argument types "~w" for constraint "~w" must be ground!\n',[ArgTypes,Constraint])
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Consistency checks of type aliases
type_alias(T1,T2) <=>
var(T1)
|
chr_error(type_error,'Variable alias definition: "~w".\n',[(:- chr_type T1 == T2)]).
type_alias(T1,T2) <=>
var(T2)
|
chr_error(type_error,'Variable alias definition: "~w".\n',[(:- chr_type T1 == T2)]).
type_alias(T,T2) <=>
functor(T,F,A),
functor(T2,F,A),
copy_term((T,T2),(X,Y)), subsumes(X,Y)
|
chr_error(type_error,'Cyclic alias definition: "~w".\n',[(T == T2)]).
type_alias(T1,A1), type_alias(T2,A2) <=>
functor(T1,F,A),
functor(T2,F,A),
\+ (T1\=T2)
|
copy_term_nat(T1,T1_),
copy_term_nat(T2,T2_),
T1_ = T2_,
chr_error(type_error,
'Ambiguous type aliases: you have defined \n\t`~w\'\n\t`~w\'\n\tresulting in two definitions for "~w".\n',[T1==A1,T2==A2,T1_]).
type_alias(T,B) \ type_alias(X,T2) <=>
functor(T,F,A),
functor(T2,F,A),
copy_term_nat((X,T2,T,B),(X2,T3,T1,D1)),
subsumes(T1,T3)
|
% chr_info(type_information,'Inferring `~w\' from `~w\' and `~w\'.\n',[X2==D1,X==T2,T==B]),
type_alias(X2,D1).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Consistency checks of type definitions
type_definition(T1,_), type_definition(T2,_)
<=>
functor(T1,F,A), functor(T2,F,A)
|
chr_error(type_error,'Multiple definitions for type: ~w/~w.\n',[F,A]).
type_definition(T1,_), type_alias(T2,_)
<=>
functor(T1,F,A), functor(T2,F,A)
|
chr_error(type_error,'Multiple definitions for type, once in a type definition and once as a type alias: ~w/~w.\n',[F,A]).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
%% get_type_definition(+Type,-Definition) is semidet.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
get_type_definition(T,Def)
<=>
\+ ground(T)
|
chr_error(type_error,'Non-ground type in constraint definition: "~w".\n',[T]).
type_alias(T,D) \ get_type_definition(T2,Def)
<=>
nonvar(T),nonvar(T2),functor(T,F,A),functor(T2,F,A),
copy_term_nat((T,D),(T1,D1)),T1=T2
|
( get_type_definition(D1,Def) ->
true
;
chr_error(type_error,'Could not find type definition for "~w" (accessed via alias "~w").\n',[D1,T1]), fail
).
type_definition(T,D) \ get_type_definition(T2,Def)
<=>
nonvar(T),nonvar(T2),functor(T,F,A),functor(T2,F,A),
copy_term_nat((T,D),(T1,D1)),T1=T2
|
Def = D1.
get_type_definition(Type,Def)
<=>
atomic_builtin_type(Type,_,_)
|
Def = [Type].
get_type_definition(Type,Def)
<=>
compound_builtin_type(Type,_,_,_)
|
Def = [Type].
get_type_definition(X,Y) <=> fail.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
%% get_type_definition_det(+Type,-Definition) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
get_type_definition_det(Type,Definition) :-
( get_type_definition(Type,Definition) ->
true
;
chr_error(type,'Could not find type definition for type `~w\'.\n',[Type])
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% get_constraint_type(+ConstraintSymbol,-Types) is semidet.
%
% Return argument types of =ConstraintSymbol=, but fails if none where
% declared.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
constraint_type(C,T) \ get_constraint_type(C,Type) <=> Type = T.
get_constraint_type(_,_) <=> fail.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% get_constraint_type_det(+ConstraintSymbol,-Types) is det.
%
% Like =get_constraint_type/2=, but returns list of =any= types when
% no types are declared.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
get_constraint_type_det(ConstraintSymbol,Types) :-
( get_constraint_type(ConstraintSymbol,Types) ->
true
;
ConstraintSymbol = _ / N,
replicate(N,any,Types)
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% unalias_type(+Alias,-Type) is det.
%
% Follows alias chain until base type is reached.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_constraint unalias_type/2.
unalias_var @
unalias_type(Alias,BaseType)
<=>
var(Alias)
|
BaseType = Alias.
unalias_alias @
type_alias(AliasProtoType,ProtoType) \ unalias_type(Alias,BaseType)
<=>
nonvar(AliasProtoType),
nonvar(Alias),
functor(AliasProtoType,F,A),
functor(Alias,F,A),
copy_term_nat((AliasProtoType,ProtoType),(AliasInstance,Type)),
Alias = AliasInstance
|
unalias_type(Type,BaseType).
unalias_type_definition @
type_definition(ProtoType,Definition) \ unalias_type(Alias,BaseType)
<=>
nonvar(ProtoType),
nonvar(Alias),
functor(ProtoType,F,A),
functor(Alias,F,A)
|
BaseType = Alias.
unalias_atomic_builtin @
unalias_type(Alias,BaseType)
<=>
atomic_builtin_type(Alias,_,_)
|
BaseType = Alias.
unalias_compound_builtin @
unalias_type(Alias,BaseType)
<=>
compound_builtin_type(Alias,_,_,_)
|
BaseType = Alias.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% types_modes_condition(+Heads,+UnrollHeads,-Condition) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_constraint types_modes_condition/3.
:- chr_option(mode,types_modes_condition(+,+,?)).
:- chr_option(type_declaration,types_modes_condition(list,list,goal)).
types_modes_condition([],[],T) <=> T=true.
constraint_mode(F/A,Modes) \ types_modes_condition([Head|Heads],[UnrollHead|UnrollHeads],Condition)
<=>
functor(Head,F,A)
|
Head =.. [_|Args],
Condition = (ModesCondition, TypesCondition, RestCondition),
modes_condition(Modes,Args,ModesCondition),
get_constraint_type_det(F/A,Types),
UnrollHead =.. [_|RealArgs],
types_condition(Types,Args,RealArgs,Modes,TypesCondition),
types_modes_condition(Heads,UnrollHeads,RestCondition).
types_modes_condition([Head|_],_,_)
<=>
functor(Head,F,A),
chr_error(internal,'Mode information missing for ~w.\n',[F/A]).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% modes_condition(+Modes,+Args,-Condition) is det.
%
% Return =Condition= on =Args= that checks =Modes=.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
modes_condition([],[],true).
modes_condition([Mode|Modes],[Arg|Args],Condition) :-
( Mode == (+) ->
Condition = ( ground(Arg) , RCondition )
; Mode == (-) ->
Condition = ( var(Arg) , RCondition )
;
Condition = RCondition
),
modes_condition(Modes,Args,RCondition).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% types_condition(+Types,+Args,+UnrollArgs,+Modes,-Condition) is det.
%
% Return =Condition= on =Args= that checks =Types= given =Modes=.
% =UnrollArgs= controls the depth of type definition unrolling.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
types_condition([],[],[],[],true).
types_condition([Type|Types],[Arg|Args],[UnrollArg|UnrollArgs],[Mode|Modes],(DisjTypeConditionList,RCondition)) :-
( Mode == (-) ->
TypeConditionList = [true] % TypeConditionList = [var(Arg)] already encoded in modes_condition
;
get_type_definition_det(Type,Def),
type_condition(Def,Arg,UnrollArg,Mode,TypeConditionList1),
( Mode == (+) ->
TypeConditionList = TypeConditionList1
;
TypeConditionList = [(\+ ground(Arg))|TypeConditionList1]
)
),
list2disj(TypeConditionList,DisjTypeConditionList),
types_condition(Types,Args,UnrollArgs,Modes,RCondition).
type_condition([],_,_,_,[]).
type_condition([DefCase|DefCases],Arg,UnrollArg,Mode,[Condition|Conditions]) :-
( var(DefCase) ->
chr_error(type,'Unexpected variable type in type definition!\n',[]) % Condition = true
; atomic_builtin_type(DefCase,Arg,Condition) ->
true
; compound_builtin_type(DefCase,Arg,Condition,_) ->
true
;
type_def_case_condition(DefCase,Arg,UnrollArg,Mode,Condition)
),
type_condition(DefCases,Arg,UnrollArg,Mode,Conditions).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_type atomic_builtin_type ---> any
; number
; float
; int
; natural
; dense_int
; chr_identifier
; chr_identifier(any)
; /* all possible values are given
*/
chr_enum(list(any))
; /* all values of interest are given
for the other values a handler is provided */
chr_enum(list(any),any)
; /* all possible values appear in rule heads;
to distinguish between multiple chr_constants
we have a key*/
chr_constants(any)
; /* all relevant values appear in rule heads;
for other values a handler is provided */
chr_constants(any,any).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
ast_atomic_builtin_type(Type,AstTerm,Goal) :-
ast_term_to_term(AstTerm,Term),
atomic_builtin_type(Type,Term,Goal).
ast_compound_builtin_type(Type,AstTerm,Goal) :-
ast_term_to_term(AstTerm,Term),
compound_builtin_type(Type,Term,_,Goal).
atomic_builtin_type(any,_Arg,true).
atomic_builtin_type(dense_int,Arg,(integer(Arg),Arg>=0)).
atomic_builtin_type(int,Arg,integer(Arg)).
atomic_builtin_type(number,Arg,number(Arg)).
atomic_builtin_type(float,Arg,float(Arg)).
atomic_builtin_type(natural,Arg,(integer(Arg),Arg>=0)).
atomic_builtin_type(chr_identifier,_Arg,true).
compound_builtin_type(chr_constants(_),_Arg,true,true).
compound_builtin_type(chr_constants(_,_),_Arg,true,true).
compound_builtin_type(chr_identifier(_),_Arg,true,true).
compound_builtin_type(chr_enum(Constants),Arg,(ground(Arg), memberchk(Arg,Constants)),
once(( member(Constant,Constants),
unifiable(Arg,Constant,_)
)
)
).
compound_builtin_type(chr_enum(_,_),Arg,true,true).
is_chr_constants_type(chr_constants(Key),Key,no).
is_chr_constants_type(chr_constants(Key,ErrorHandler),Key,yes(ErrorHandler)).
is_chr_enum_type(chr_enum(Constants), Constants, no).
is_chr_enum_type(chr_enum(Constants,Handler), Constants, yes(Handler)).
type_def_case_condition(DefCase,Arg,UnrollArg,Mode,Condition) :-
( nonvar(DefCase) ->
functor(DefCase,F,A),
( A == 0 ->
Condition = (Arg = DefCase)
; var(UnrollArg) ->
Condition = functor(Arg,F,A)
; functor(UnrollArg,F,A) ->
Condition = (functor(Arg,F,A),Arg=Template,ArgsCondition),
DefCase =.. [_|ArgTypes],
UnrollArg =.. [_|UnrollArgs],
functor(Template,F,A),
Template =.. [_|TemplateArgs],
replicate(A,Mode,ArgModes),
types_condition(ArgTypes,TemplateArgs,UnrollArgs,ArgModes,ArgsCondition)
;
Condition = functor(Arg,F,A)
)
;
chr_error(internal,'Illegal type definition (must be nonvar).\n',[])
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% STATIC TYPE CHECKING
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Checks head constraints and CHR constraint calls in bodies.
%
% TODO:
% - type clashes involving built-in types
% - Prolog built-ins in guard and body
% - indicate position in terms in error messages
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:- chr_constraint
static_type_check/2.
% 1. Check the declared types
constraint_type(Constraint,ArgTypes), static_type_check(_,_)
==>
forall(
( member(ArgType,ArgTypes), sub_term(ArgType,Type) ),
( get_type_definition(Type,_) ->
true
;
chr_error(type_error,'Undefined type "~w" used in type declaration of "~w".\n',[Type,Constraint])
)
).
% 2. Check the rules
:- chr_type type_error_src ---> head(any) ; body(any).
static_type_check(PragmaRules,AstRules)
<=>
maplist(static_type_check_rule,PragmaRules,AstRules).
static_type_check_rule(PragmaRule,AstRule) :-
AstRule = ast_rule(AstHead,_AstGuard,_Guard,AstBody,_Body),
(
catch(
( ast_static_type_check_head(AstHead),
ast_static_type_check_body(AstBody)
),
type_error(Error),
( Error = invalid_functor(Src,Term,Type) ->
chr_error(type_error,'Invalid functor in ~@ of ~@:\n\t\tfound `~w\',\n\t\texpected type `~w\'!\n',
[chr_translate:format_src(Src),format_rule(PragmaRule),Term,Type])
; Error = type_clash(Var,Src1,Src2,Type1,Type2) ->
chr_error(type_error,'Type clash for variable ~w in ~@:\n\t\texpected type ~w in ~@\n\t\texpected type ~w in ~@\n',
[Var,format_rule(PragmaRule),Type1,chr_translate:format_src(Src1),Type2,chr_translate:format_src(Src2)])
)
),
fail % cleanup constraints
;
true
).
%------------------------------------------------------------------------------%
% Static Type Checking: Head Constraints {{{
ast_static_type_check_head(simplification(AstConstraints)) :-
maplist(ast_static_type_check_head_constraint,AstConstraints).
ast_static_type_check_head(propagation(AstConstraints)) :-
maplist(ast_static_type_check_head_constraint,AstConstraints).
ast_static_type_check_head(simpagation(AstConstraints1,AstConstraints2)) :-
maplist(ast_static_type_check_head_constraint,AstConstraints1),
maplist(ast_static_type_check_head_constraint,AstConstraints2).
ast_static_type_check_head_constraint(AstConstraint) :-
AstConstraint = chr_constraint(Symbol,Arguments,_),
get_constraint_type_det(Symbol,Types),
maplist(ast_static_type_check_term(head(Head)),Arguments,Types).
% }}}
%------------------------------------------------------------------------------%
% Static Type Checking: Terms {{{
:- chr_constraint ast_static_type_check_term/3.
:- chr_option(mode,ast_static_type_check_term(?,?,?)).
:- chr_option(type_declaration,ast_static_type_check_term(type_error_src,any,any)).
ast_static_type_check_term(_,_,any)
<=>
true.
ast_static_type_check_term(Src,var(Id,Var),Type)
<=>
ast_static_type_check_var(Id,var(Id,Var),Type,Src).
ast_static_type_check_term(Src,Term,Type)
<=>
ast_atomic_builtin_type(Type,Term,Goal)
|
( call(Goal) ->
true
;
throw(type_error(invalid_functor(Src,Term,Type)))
).
ast_static_type_check_term(Src,Term,Type)
<=>
ast_compound_builtin_type(Type,Term,Goal)
|
( call(Goal) ->
true
;
throw(type_error(invalid_functor(Src,Term,Type)))
).
type_alias(AType,ADef) \ ast_static_type_check_term(Src,Term,Type)
<=>
functor(Type,F,A),
functor(AType,F,A)
|
copy_term_nat(AType-ADef,Type-Def),
ast_static_type_check_term(Src,Term,Def).
type_definition(AType,ADef) \ ast_static_type_check_term(Src,Term,Type)
<=>
functor(Type,F,A),
functor(AType,F,A)
|
copy_term_nat(AType-ADef,Type-Variants),
ast_functor(Term,TF,TA),
( member(Variant,Variants), functor(Variant,TF,TA) ->
ast_args(Term,Args),
Variant =.. [_|Types],
maplist(ast_static_type_check_term(Src),Args,Types)
;
throw(type_error(invalid_functor(Src,Term,Type)))
).
ast_static_type_check_term(Src,Term,Type)
<=>
chr_error(internal,'Undefined type ~w while type checking term ~w in ~@.\n',[Type,Term,chr_translate:format_src(Src)]).
% }}}
%------------------------------------------------------------------------------%
% Static Type Checking: Variables {{{
:- chr_constraint ast_static_type_check_var/4.
:- chr_option(mode,ast_static_type_check_var(+,?,?,?)).
:- chr_option(type_declaration,ast_static_type_check_var(var_id,any,any,type_error_src)).
type_alias(AType,ADef) \ ast_static_type_check_var(VarId,Var,Type,Src)
<=>
functor(AType,F,A),
functor(Type,F,A)
|
copy_term_nat(AType-ADef,Type-Def),
ast_static_type_check_var(VarId,Var,Def,Src).
ast_static_type_check_var(VarId,Var,Type,Src)
<=>
atomic_builtin_type(Type,_,_)
|
ast_static_atomic_builtin_type_check_var(VarId,Var,Type,Src).
ast_static_type_check_var(VarId,Var,Type,Src)
<=>
compound_builtin_type(Type,_,_,_)
|
true.
ast_static_type_check_var(VarId,Var,Type1,Src1), ast_static_type_check_var(VarId,_Var,Type2,Src2)
<=>
Type1 \== Type2
|
throw(type_error(type_clash(Var,Src1,Src2,Type1,Type2))).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_constraint ast_static_atomic_builtin_type_check_var/4.
:- chr_option(mode,ast_static_atomic_builtin_type_check_var(+,?,+,?)).
:- chr_option(type_declaration,ast_static_atomic_builtin_type_check_var(var_id,any,atomic_builtin_type,type_error_src)).
ast_static_atomic_builtin_type_check_var(_,_,any,_) <=> true.
ast_static_atomic_builtin_type_check_var(VarId,_,BuiltinType,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,BuiltinType,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,float,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,number,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,int,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,number,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,natural,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,number,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,dense_int,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,number,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,natural,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,int,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,dense_int,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,int,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,_,dense_int,_) \ ast_static_atomic_builtin_type_check_var(VarId,_,natural,_)
<=>
true.
ast_static_atomic_builtin_type_check_var(VarId,Var,Type1,Src1), ast_static_atomic_builtin_type_check_var(VarId,_Var,Type2,Src2)
<=>
throw(type_error(type_clash(Var,Src1,Src2,Type1,Type2))).
% }}}
%------------------------------------------------------------------------------%
% Static Type Checking: Bodies {{{
ast_static_type_check_body([]).
ast_static_type_check_body([Goal|Goals]) :-
ast_symbol(Goal,Symbol),
get_constraint_type_det(Symbol,Types),
ast_args(Goal,Args),
maplist(ast_static_type_check_term(body(Goal)),Args,Types),
ast_static_type_check_body(Goals).
% }}}
%------------------------------------------------------------------------------%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% format_src(+type_error_src) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
format_src(head(Head)) :- format('head ~w',[Head]).
format_src(body(Goal)) :- format('body goal ~w',[Goal]).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Dynamic type checking
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:- chr_constraint
dynamic_type_check/0,
dynamic_type_check_clauses/1,
get_dynamic_type_check_clauses/1.
generate_dynamic_type_check_clauses(Clauses) :-
( chr_pp_flag(debugable,on) ->
dynamic_type_check,
get_dynamic_type_check_clauses(Clauses0),
append(Clauses0,
[('$dynamic_type_check'(Type,Term) :-
throw(error(type_error(Type,Term),context(_,'CHR Runtime Type Error')))
)],
Clauses)
;
Clauses = []
).
type_definition(T,D), dynamic_type_check
==>
copy_term_nat(T-D,Type-Definition),
maplist(dynamic_type_check_clause(Type),Definition,DynamicChecks),
dynamic_type_check_clauses(DynamicChecks).
type_alias(A,B), dynamic_type_check
==>
copy_term_nat(A-B,Alias-Body),
dynamic_type_check_alias_clause(Alias,Body,Clause),
dynamic_type_check_clauses([Clause]).
dynamic_type_check <=>
findall(
('$dynamic_type_check'(Type,Term) :- Goal),
( atomic_builtin_type(Type,Term,Goal) ; compound_builtin_type(Type,Term,Goal,_) ),
BuiltinChecks
),
dynamic_type_check_clauses(BuiltinChecks).
dynamic_type_check_clause(T,DC,Clause) :-
copy_term(T-DC,Type-DefinitionClause),
functor(DefinitionClause,F,A),
functor(Term,F,A),
DefinitionClause =.. [_|DCArgs],
Term =.. [_|TermArgs],
maplist(dynamic_type_check_call,DCArgs,TermArgs,RecursiveCallList),
list2conj(RecursiveCallList,RecursiveCalls),
Clause = (
'$dynamic_type_check'(Type,Term) :-
RecursiveCalls
).
dynamic_type_check_alias_clause(Alias,Body,Clause) :-
Clause = (
'$dynamic_type_check'(Alias,Term) :-
'$dynamic_type_check'(Body,Term)
).
dynamic_type_check_call(Type,Term,Call) :-
% ( nonvar(Type), atomic_builtin_type(Type,Term,Goal) ->
% Call = when(nonvar(Term),Goal)
% ; nonvar(Type), compound_builtin_type(Type,Term,Goal) ->
% Call = when(nonvar(Term),Goal)
% ;
( Type == any ->
Call = true
;
Call = when(nonvar(Term),once('$dynamic_type_check'(Type,Term)))
)
% )
.
dynamic_type_check_clauses(C1), dynamic_type_check_clauses(C2)
<=>
append(C1,C2,C),
dynamic_type_check_clauses(C).
get_dynamic_type_check_clauses(Q), dynamic_type_check_clauses(C)
<=>
Q = C.
get_dynamic_type_check_clauses(Q)
<=>
Q = [].
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Atomic Types
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Some optimizations can be applied for atomic types...
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
atomic_types_suspended_constraint(C) :-
C = _/N,
get_constraint_type(C,ArgTypes),
get_constraint_mode(C,ArgModes),
numlist(1,N,Indexes),
maplist(atomic_types_suspended_constraint(C),ArgTypes,ArgModes,Indexes).
atomic_types_suspended_constraint(C,Type,Mode,Index) :-
( is_indexed_argument(C,Index) ->
( Mode == (?) ->
atomic_type(Type)
;
true
)
;
true
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% atomic_type(+Type) is semidet.
%
% Succeeds when all values of =Type= are atomic.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_constraint atomic_type/1.
atomic_type(Type) <=> atomic_builtin_type(Type,_,_) | Type \== any.
type_definition(TypePat,Def) \ atomic_type(Type)
<=>
functor(Type,F,A), functor(TypePat,F,A)
|
maplist(atomic,Def).
type_alias(TypePat,Alias) \ atomic_type(Type)
<=>
functor(Type,F,A), functor(TypePat,F,A)
|
atomic(Alias),
copy_term_nat(TypePat-Alias,Type-NType),
atomic_type(NType).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% enumerated_atomic_type(+Type,-Atoms) is semidet.
%
% Succeeds when all values of =Type= are atomic
% and the atom values are finitely enumerable.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
:- chr_constraint enumerated_atomic_type/2.
enumerated_atomic_type(Type,_) <=> atomic_builtin_type(Type,_,_) | fail.
type_definition(TypePat,Def) \ enumerated_atomic_type(Type,Atoms)
<=>
functor(Type,F,A), functor(TypePat,F,A)
|
maplist(atomic,Def),
Atoms = Def.
type_alias(TypePat,Alias) \ enumerated_atomic_type(Type,Atoms)
<=>
functor(Type,F,A), functor(TypePat,F,A)
|
atomic(Alias),
copy_term_nat(TypePat-Alias,Type-NType),
enumerated_atomic_type(NType,Atoms).
enumerated_atomic_type(_,_)
<=>
fail.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
stored/3, % constraint,occurrence,(yes/no/maybe)
stored_completing/3,
stored_complete/3,
is_stored/1,
is_finally_stored/1,
check_all_passive/2.
:- chr_option(mode,stored(+,+,+)).
:- chr_option(type_declaration,stored(any,int,storedinfo)).
:- chr_type storedinfo ---> yes ; no ; maybe.
:- chr_option(mode,stored_complete(+,+,+)).
:- chr_option(mode,maybe_complementary_guards(+,+,?,?)).
:- chr_option(mode,guard_list(+,+,+,+)).
:- chr_option(mode,check_all_passive(+,+)).
:- chr_option(type_declaration,check_all_passive(any,list)).
% change yes in maybe when yes becomes passive
passive(RuleNb,ID), occurrence(C,O,RuleNb,ID,_) \
stored(C,O,yes), stored_complete(C,RO,Yesses)
<=> O < RO | NYesses is Yesses - 1,
stored(C,O,maybe), stored_complete(C,RO,NYesses).
% change yes in maybe when not observed
ai_not_observed(C,O) \ stored(C,O,yes), stored_complete(C,RO,Yesses)
<=> O < RO |
NYesses is Yesses - 1,
stored(C,O,maybe), stored_complete(C,RO,NYesses).
occurrence(_,_,RuleNb,ID,_), occurrence(C2,_,RuleNb,_,_), stored_complete(C2,RO,0), max_occurrence(C2,MO2)
==> RO =< MO2 | % C2 is never stored
passive(RuleNb,ID).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
rule(RuleNb,Rule),passive(RuleNb,Id) ==>
Rule = pragma(rule(Head1,Head2,G,B),ids([Id|IDs1],IDs2),Pragmas,Name,RuleNb) |
append(IDs1,IDs2,I), check_all_passive(RuleNb,I).
rule(RuleNb,Rule),passive(RuleNb,Id) ==>
Rule = pragma(rule(Head1,Head2,G,B),ids([],[Id|IDs2]),Pragmas,Name,RuleNb) |
check_all_passive(RuleNb,IDs2).
passive(RuleNb,Id) \ check_all_passive(RuleNb,[Id|IDs]) <=>
check_all_passive(RuleNb,IDs).
rule(RuleNb,Rule) \ check_all_passive(RuleNb,[]) <=>
chr_warning(weird_program,'All heads passive in ~@.\n\tThis rule never fires. Please check your program.\n',[format_rule(Rule)]).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% collect the storage information
stored(C,O,yes) \ stored_completing(C,O,Yesses)
<=> NO is O + 1, NYesses is Yesses + 1,
stored_completing(C,NO,NYesses).
stored(C,O,maybe) \ stored_completing(C,O,Yesses)
<=> NO is O + 1,
stored_completing(C,NO,Yesses).
stored(C,O,no) \ stored_completing(C,O,Yesses)
<=> stored_complete(C,O,Yesses).
stored_completing(C,O,Yesses)
<=> stored_complete(C,O,Yesses).
stored_complete(C,O,Yesses), occurrence(C,O2,RuleNb,Id,_) ==>
O2 > O | passive(RuleNb,Id).
% decide whether a constraint is stored
max_occurrence(C,MO), stored_complete(C,RO,0) \ is_stored(C)
<=> RO =< MO | fail.
is_stored(C) <=> true.
% decide whether a constraint is suspends after occurrences
max_occurrence(C,MO), stored_complete(C,RO,_) \ is_finally_stored(C)
<=> RO =< MO | fail.
is_finally_stored(C) <=> true.
storage_analysis(Constraints) :-
( chr_pp_flag(storage_analysis,on) ->
check_constraint_storages(Constraints)
;
true
).
check_constraint_storages(Symbols) :- maplist(check_constraint_storage,Symbols).
check_constraint_storage(C) :-
get_max_occurrence(C,MO),
check_occurrences_storage(C,1,MO).
check_occurrences_storage(C,O,MO) :-
( O > MO ->
stored_completing(C,1,0)
;
check_occurrence_storage(C,O),
NO is O + 1,
check_occurrences_storage(C,NO,MO)
).
check_occurrence_storage(C,O) :-
get_occurrence(C,O,RuleNb,ID,OccType),
( is_passive(RuleNb,ID) ->
stored(C,O,maybe)
;
get_rule(RuleNb,PragmaRule),
PragmaRule = pragma(rule(Heads1,Heads2,Guard,Body),ids(IDs1,IDs2),_,_,_),
( OccType == simplification, select2(ID,Head1,IDs1,Heads1,RIDs1,RHeads1) ->
check_storage_head1(Head1,O,Heads1,Heads2,Guard)
; OccType == propagation, select2(ID,Head2,IDs2,Heads2,RIDs2,RHeads2) ->
check_storage_head2(Head2,O,Heads1,Body)
)
).
check_storage_head1(Head,O,H1,H2,G) :-
functor(Head,F,A),
C = F/A,
( H1 == [Head],
H2 == [],
% writeq(guard_entailment:entails_guard([chr_pp_headvariables(Head)],G)),nl,
guard_entailment:entails_guard([chr_pp_headvariables(Head)],G),
Head =.. [_|L],
no_matching(L,[]) ->
stored(C,O,no)
;
stored(C,O,maybe)
).
no_matching([],_).
no_matching([X|Xs],Prev) :-
var(X),
\+ memberchk_eq(X,Prev),
no_matching(Xs,[X|Prev]).
check_storage_head2(Head,O,H1,B) :-
functor(Head,F,A),
C = F/A,
( %(
( H1 \== [], B == true )
%;
% \+ is_observed(F/A,O) % always fails because observation analysis has not been performed yet
%)
->
stored(C,O,maybe)
;
stored(C,O,yes)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ ____ _ _ _ _
%% | _ \ _ _| | ___ / ___|___ _ __ ___ _ __ (_) | __ _| |_(_) ___ _ __
%% | |_) | | | | |/ _ \ | | / _ \| '_ ` _ \| '_ \| | |/ _` | __| |/ _ \| '_ \
%% | _ <| |_| | | __/ | |__| (_) | | | | | | |_) | | | (_| | |_| | (_) | | | |
%% |_| \_\\__,_|_|\___| \____\___/|_| |_| |_| .__/|_|_|\__,_|\__|_|\___/|_| |_|
%% |_|
constraints_code(Constraints,Clauses) :-
(chr_pp_flag(reduced_indexing,on),
forall(C,Constraints,chr_translate:only_ground_indexed_arguments(C)) ->
none_suspended_on_variables
;
true
),
constraints_code1(Constraints,Clauses,[]).
%===============================================================================
:- chr_constraint constraints_code1/3.
:- chr_option(mode,constraints_code1(+,+,+)).
:- chr_option(type_declaration,constraints_code1(list,any,any)).
%-------------------------------------------------------------------------------
constraints_code1([],L,T) <=> L = T.
constraints_code1([C|RCs],L,T)
<=>
constraint_code(C,L,T1),
constraints_code1(RCs,T1,T).
%===============================================================================
:- chr_constraint constraint_code/3.
:- chr_option(mode,constraint_code(+,+,+)).
%-------------------------------------------------------------------------------
%% Generate code for a single CHR constraint
constraint_code(Constraint, L, T)
<=> true
| ( (chr_pp_flag(debugable,on) ;
is_stored(Constraint), ( has_active_occurrence(Constraint); chr_pp_flag(late_allocation,off)),
( may_trigger(Constraint) ;
get_allocation_occurrence(Constraint,AO),
get_max_occurrence(Constraint,MO), MO >= AO ) )
->
constraint_prelude(Constraint,Clause),
add_dummy_location(Clause,LocatedClause),
L = [LocatedClause | L1]
;
L = L1
),
Id = [0],
occurrences_code(Constraint,1,Id,NId,L1,L2),
gen_cond_attach_clause(Constraint,NId,L2,T).
%===============================================================================
%% Generate prelude predicate for a constraint.
%% f(...) :- f/a_0(...,Susp).
constraint_prelude(F/A, Clause) :-
vars_susp(A,Vars,Susp,VarsSusp),
Head =.. [ F | Vars],
make_suspension_continuation_goal(F/A,VarsSusp,Continuation),
build_head(F,A,[0],VarsSusp,Delegate),
( chr_pp_flag(debugable,on) ->
insert_constraint_goal(F/A,Susp,Vars,InsertCall),
attach_constraint_atom(F/A,Vars2,Susp,AttachCall),
delay_phase_end(validate_store_type_assumptions,chr_translate:update_suspension_field(F/A,Susp,state,inactive,Inactive)),
insert_constraint_internal_constraint_goal(F/A, Vars2, Susp, Continuation, Vars,InsertGoal),
( get_constraint_type(F/A,ArgTypeList) ->
maplist(dynamic_type_check_call,ArgTypeList,Vars,DynamicTypeCheckList),
list2conj(DynamicTypeCheckList,DynamicTypeChecks)
;
DynamicTypeChecks = true
),
Clause =
( Head :-
DynamicTypeChecks,
InsertGoal,
InsertCall,
AttachCall,
Inactive,
'chr debug_event'(insert(Head#Susp)),
(
'chr debug_event'(call(Susp)),
Delegate
;
'chr debug_event'(fail(Susp)), !,
fail
),
(
'chr debug_event'(exit(Susp))
;
'chr debug_event'(redo(Susp)),
fail
)
)
; get_allocation_occurrence(F/A,0) ->
gen_insert_constraint_internal_goal(F/A,Goal,VarsSusp,Vars,Susp),
delay_phase_end(validate_store_type_assumptions,chr_translate:update_suspension_field(F/A,Susp,state,inactive,Inactive)),
Clause = ( Head :- Goal, Inactive, Delegate )
;
Clause = ( Head :- Delegate )
).
make_suspension_continuation_goal(F/A,VarsSusp,Goal) :-
( may_trigger(F/A) ->
build_head(F,A,[0],VarsSusp,Delegate),
( chr_pp_flag(debugable,off) ->
Goal = Delegate
;
get_target_module(Mod),
Goal = Mod:Delegate
)
;
Goal = true
).
%===============================================================================
:- chr_constraint has_active_occurrence/1, has_active_occurrence/2.
:- chr_option(mode,has_active_occurrence(+)).
:- chr_option(mode,has_active_occurrence(+,+)).
:- chr_constraint memo_has_active_occurrence/1.
:- chr_option(mode,memo_has_active_occurrence(+)).
%-------------------------------------------------------------------------------
memo_has_active_occurrence(C) \ has_active_occurrence(C) <=> true.
has_active_occurrence(C) <=> has_active_occurrence(C,1), memo_has_active_occurrence(C).
max_occurrence(C,MO) \ has_active_occurrence(C,O) <=>
O > MO | fail.
passive(RuleNb,ID),occurrence(C,O,RuleNb,ID,_) \
has_active_occurrence(C,O) <=>
NO is O + 1,
has_active_occurrence(C,NO).
has_active_occurrence(C,O) <=> true.
%===============================================================================
gen_cond_attach_clause(F/A,Id,L,T) :-
( is_finally_stored(F/A) ->
get_allocation_occurrence(F/A,AllocationOccurrence),
get_max_occurrence(F/A,MaxOccurrence),
( chr_pp_flag(debugable,off), MaxOccurrence < AllocationOccurrence ->
( only_ground_indexed_arguments(F/A) ->
gen_insert_constraint_internal_goal(F/A,Body,AllArgs,Args,Susp)
;
gen_cond_attach_goal(F/A,Body,AllArgs,Args,Susp)
)
; vars_susp(A,Args,Susp,AllArgs),
gen_uncond_attach_goal(F/A,Susp,Args,Body,_)
),
build_head(F,A,Id,AllArgs,Head),
Clause = ( Head :- Body ),
add_dummy_location(Clause,LocatedClause),
L = [LocatedClause | T]
;
L = T
).
:- chr_constraint use_auxiliary_predicate/1.
:- chr_option(mode,use_auxiliary_predicate(+)).
:- chr_constraint use_auxiliary_predicate/2.
:- chr_option(mode,use_auxiliary_predicate(+,+)).
:- chr_constraint is_used_auxiliary_predicate/1.
:- chr_option(mode,is_used_auxiliary_predicate(+)).
:- chr_constraint is_used_auxiliary_predicate/2.
:- chr_option(mode,is_used_auxiliary_predicate(+,+)).
use_auxiliary_predicate(P) \ use_auxiliary_predicate(P) <=> true.
use_auxiliary_predicate(P,C) \ use_auxiliary_predicate(P,C) <=> true.
use_auxiliary_predicate(P) \ is_used_auxiliary_predicate(P) <=> true.
use_auxiliary_predicate(P,_) \ is_used_auxiliary_predicate(P) <=> true.
is_used_auxiliary_predicate(P) <=> fail.
use_auxiliary_predicate(P) \ is_used_auxiliary_predicate(P,_) <=> true.
use_auxiliary_predicate(P,C) \ is_used_auxiliary_predicate(P,C) <=> true.
is_used_auxiliary_predicate(P,C) <=> fail.
%------------------------------------------------------------------------------%
% Only generate import statements for actually used modules.
%------------------------------------------------------------------------------%
:- chr_constraint use_auxiliary_module/1.
:- chr_option(mode,use_auxiliary_module(+)).
:- chr_constraint is_used_auxiliary_module/1.
:- chr_option(mode,is_used_auxiliary_module(+)).
use_auxiliary_module(P) \ use_auxiliary_module(P) <=> true.
use_auxiliary_module(P) \ is_used_auxiliary_module(P) <=> true.
is_used_auxiliary_module(P) <=> fail.
% only called for constraints with
% at least one
% non-ground indexed argument
gen_cond_attach_goal(F/A,Goal,AllArgs,Args,Susp) :-
vars_susp(A,Args,Susp,AllArgs),
make_suspension_continuation_goal(F/A,AllArgs,Closure),
( get_store_type(F/A,var_assoc_store(_,_)) ->
Attach = true
;
attach_constraint_atom(F/A,Vars,Susp,Attach)
),
FTerm =.. [F|Args],
insert_constraint_goal(F/A,Susp,Args,InsertCall),
insert_constraint_internal_constraint_goal(F/A, Vars, Susp, Closure, Args,InsertGoal),
( may_trigger(F/A) ->
activate_constraint_goal(F/A,(InsertCall,Attach),Vars,Susp,_,ActivateGoal),
Goal =
(
( var(Susp) ->
InsertGoal, % insert_constraint_internal(Stored,Vars,Susp,Closure,F,Args)
InsertCall,
Attach
;
ActivateGoal % activate_constraint(Stored,Vars,Susp,_)
)
)
;
Goal =
(
InsertGoal, % insert_constraint_internal(Stored,Vars,Susp,Closure,F,Args),
InsertCall,
Attach
)
).
gen_insert_constraint_internal_goal(F/A,Goal,AllArgs,Args,Susp) :-
vars_susp(A,Args,Susp,AllArgs),
make_suspension_continuation_goal(F/A,AllArgs,Cont),
( \+ only_ground_indexed_arguments(F/A), \+ get_store_type(F/A,var_assoc_store(_,_)) ->
attach_constraint_atom(F/A,Vars,Susp,Attach)
;
Attach = true
),
FTerm =.. [F|Args],
insert_constraint_goal(F/A,Susp,Args,InsertCall),
insert_constraint_internal_constraint_goal(F/A, Vars, Susp, Cont, Args,InsertInternalGoal),
( only_ground_indexed_arguments(F/A), chr_pp_flag(debugable,off) ->
Goal =
(
InsertInternalGoal, % insert_constraint_internal(Susp,F,Args),
InsertCall
)
;
Goal =
(
InsertInternalGoal, % insert_constraint_internal(_,Vars,Susp,Cont,F,Args),
InsertCall,
Attach
)
).
gen_uncond_attach_goal(FA,Susp,Args,AttachGoal,Generation) :-
( \+ only_ground_indexed_arguments(FA), \+ get_store_type(FA,var_assoc_store(_,_)) ->
attach_constraint_atom(FA,Vars,Susp,Attach)
;
Attach = true
),
insert_constraint_goal(FA,Susp,Args,InsertCall),
( chr_pp_flag(late_allocation,on) ->
activate_constraint_goal(FA,(InsertCall,Attach),Vars,Susp,Generation,AttachGoal)
;
activate_constraint_goal(FA,true,Vars,Susp,Generation,AttachGoal)
).
%-------------------------------------------------------------------------------
:- chr_constraint occurrences_code/6.
:- chr_option(mode,occurrences_code(+,+,+,+,+,+)).
%-------------------------------------------------------------------------------
max_occurrence(C,MO) \ occurrences_code(C,O,Id,NId,L,T)
<=> O > MO
| NId = Id, L = T.
occurrences_code(C,O,Id,NId,L,T)
<=>
occurrence_code(C,O,Id,Id1,L,L1),
NO is O + 1,
occurrences_code(C,NO,Id1,NId,L1,T).
%-------------------------------------------------------------------------------
:- chr_constraint occurrence_code/6.
:- chr_option(mode,occurrence_code(+,+,+,+,+,+)).
%-------------------------------------------------------------------------------
occurrence(C,O,RuleNb,ID,_), passive(RuleNb,ID) \ occurrence_code(C,O,Id,NId,L,T)
<=>
( named_history(RuleNb,_,_) ->
does_use_history(C,O)
;
true
),
NId = Id,
L = T.
occurrence(C,O,RuleNb,ID,_), rule(RuleNb,PragmaRule) \ occurrence_code(C,O,Id,NId,L,T)
<=> true |
PragmaRule = pragma(rule(Heads1,Heads2,_,_),ids(IDs1,IDs2),_,_,_),
( select2(ID,Head1,IDs1,Heads1,RIDs1,RHeads1) ->
NId = Id,
head1_code(Head1,ID,RHeads1,RIDs1,PragmaRule,C,O,Id,L,T)
; select2(ID,Head2,IDs2,Heads2,RIDs2,RHeads2) ->
head2_code(Head2,ID,RHeads2,RIDs2,PragmaRule,C,O,Id,L,L1),
( should_skip_to_next_id(C,O) ->
inc_id(Id,NId),
( unconditional_occurrence(C,O) ->
L1 = T
;
gen_alloc_inc_clause(C,O,Id,L1,T)
)
;
NId = Id,
L1 = T
)
).
occurrence_code(C,O,_,_,_,_)
<=>
chr_error(internal,'occurrence_code/6: missing information to compile ~w:~w\n',[C,O]).
%-------------------------------------------------------------------------------
%% Generate code based on one removed head of a CHR rule
head1_code(Head,ID,OtherHeads,OtherIDs,PragmaRule,FA,O,Id,L,T) :-
PragmaRule = pragma(Rule,_,_,_Name,RuleNb),
Rule = rule(_,Head2,_,_),
( Head2 == [] ->
reorder_heads(RuleNb,Head,OtherHeads,OtherIDs,NOtherHeads,NOtherIDs),
simplification_code(Head,ID,NOtherHeads,NOtherIDs,PragmaRule,FA,O,Id,L,T)
;
simpagation_head1_code(Head,ID,OtherHeads,OtherIDs,PragmaRule,FA,O,Id,L,T)
).
%% Generate code based on one persistent head of a CHR rule
head2_code(Head,ID,OtherHeads,OtherIDs,PragmaRule,FA,O,Id,L,T) :-
PragmaRule = pragma(Rule,_,_,_Name,RuleNb),
Rule = rule(Head1,_,_,_),
( Head1 == [] ->
reorder_heads(RuleNb,Head,OtherHeads,OtherIDs,NOtherHeads,NOtherIDs),
propagation_code(Head,ID,NOtherHeads,NOtherIDs,Rule,RuleNb,FA,O,Id,L,T)
;
simpagation_head2_code(Head,ID,OtherHeads,OtherIDs,PragmaRule,FA,O,Id,L,T)
).
gen_alloc_inc_clause(F/A,O,Id,L,T) :-
vars_susp(A,Vars,Susp,VarsSusp),
build_head(F,A,Id,VarsSusp,Head),
inc_id(Id,IncId),
build_head(F,A,IncId,VarsSusp,CallHead),
gen_occ_allocation(F/A,O,Vars,Susp,ConditionalAlloc),
Clause =
(
Head :-
ConditionalAlloc,
CallHead
),
add_dummy_location(Clause,LocatedClause),
L = [LocatedClause|T].
gen_occ_allocation(FA,O,Vars,Susp,Goal) :-
get_allocation_occurrence(FA,AO),
get_occurrence_code_id(FA,AO,AId),
get_occurrence_code_id(FA,O,Id),
( chr_pp_flag(debugable,off), Id == AId ->
allocate_constraint_goal(FA,Susp,Vars,Goal0),
( may_trigger(FA) ->
Goal = (var(Susp) -> Goal0 ; true)
;
Goal = Goal0
)
;
Goal = true
).
gen_occ_allocation_in_guard(FA,O,Vars,Susp,Goal) :-
get_allocation_occurrence(FA,AO),
( chr_pp_flag(debugable,off), O < AO ->
allocate_constraint_goal(FA,Susp,Vars,Goal0),
( may_trigger(FA) ->
Goal = (var(Susp) -> Goal0 ; true)
;
Goal = Goal0
)
;
Goal = true
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Reorders guard goals with respect to partner constraint retrieval goals and
% active constraint. Returns combined partner retrieval + guard goal.
guard_via_reschedule_new(Retrievals,GuardList,Prelude,GuardListSkeleton,LookupSkeleton,GoalSkeleton) :-
( chr_pp_flag(guard_via_reschedule,on) ->
guard_via_reschedule_main_new(Retrievals,GuardList,Prelude,GuardListSkeleton,LookupSkeleton,ScheduleSkeleton),
list2conj(ScheduleSkeleton,GoalSkeleton)
;
length(Retrievals,RL), length(LookupSkeleton,RL),
length(GuardList,GL), length(GuardListSkeleton,GL),
append(LookupSkeleton,GuardListSkeleton,GoalListSkeleton),
list2conj(GoalListSkeleton,GoalSkeleton)
).
guard_via_reschedule_main_new(PartnerLookups,GuardList,ActiveHead,
GuardListSkeleton,LookupSkeleton,ScheduleSkeleton) :-
initialize_unit_dictionary(ActiveHead,Dict),
maplist(wrap_in_functor(lookup),PartnerLookups,WrappedPartnerLookups),
maplist(wrap_in_functor(guard),GuardList,WrappedGuardList),
build_units(WrappedPartnerLookups,WrappedGuardList,Dict,Units),
dependency_reorder(Units,NUnits),
wrappedunits2lists(NUnits,IndexedGuardListSkeleton,LookupSkeleton,ScheduleSkeleton),
sort(IndexedGuardListSkeleton,SortedIndexedGuardListSkeleton),
snd_of_pairs(SortedIndexedGuardListSkeleton,GuardListSkeleton).
wrappedunits2lists([],[],[],[]).
wrappedunits2lists([unit(N,WrappedGoal,_,_)|Units],Gs,Ls,Ss) :-
Ss = [GoalCopy|TSs],
( WrappedGoal = lookup(Goal) ->
Ls = [GoalCopy|TLs],
Gs = TGs
; WrappedGoal = guard(Goal) ->
Gs = [N-GoalCopy|TGs],
Ls = TLs
),
wrappedunits2lists(Units,TGs,TLs,TSs).
guard_splitting(Rule,SplitGuardList) :-
Rule = rule(H1,H2,Guard,_),
append(H1,H2,Heads),
conj2list(Guard,GuardList),
term_variables(Heads,HeadVars),
split_off_simple_guard_new(GuardList,HeadVars,GuardPrefix,RestGuardList),
append(GuardPrefix,[RestGuard],SplitGuardList),
term_variables(RestGuardList,GuardVars1),
% variables that are declared to be ground don't need to be locked
ground_vars(Heads,GroundVars),
list_difference_eq(HeadVars,GroundVars,LockableHeadVars),
intersect_eq(LockableHeadVars,GuardVars1,GuardVars),
maplist(chr_lock,GuardVars,Locks),
maplist(chr_unlock,GuardVars,Unlocks),
list2conj(Locks,LockPhase),
list2conj(Unlocks,UnlockPhase),
list2conj(RestGuardList,RestGuard1),
RestGuard = (LockPhase,(RestGuard1,UnlockPhase)).
guard_body_copies3(Rule,GuardList,VarDict,GuardCopyList,BodyCopy) :-
Rule = rule(_,_,_,Body),
my_term_copy(GuardList,VarDict,VarDict2,GuardCopyList),
my_term_copy(Body,VarDict2,BodyCopy).
split_off_simple_guard_new([],_,[],[]).
split_off_simple_guard_new([G|Gs],VarDict,S,C) :-
( simple_guard_new(G,VarDict) ->
S = [G|Ss],
split_off_simple_guard_new(Gs,VarDict,Ss,C)
;
S = [],
C = [G|Gs]
).
% simple guard: cheap and benign (does not bind variables)
simple_guard_new(G,Vars) :-
builtin_binds_b(G,BoundVars),
not(( member(V,BoundVars),
memberchk_eq(V,Vars)
)).
dependency_reorder(Units,NUnits) :-
dependency_reorder(Units,[],NUnits).
dependency_reorder([],Acc,Result) :-
reverse(Acc,Result).
dependency_reorder([Unit|Units],Acc,Result) :-
Unit = unit(_GID,_Goal,Type,GIDs),
( Type == fixed ->
NAcc = [Unit|Acc]
;
dependency_insert(Acc,Unit,GIDs,NAcc)
),
dependency_reorder(Units,NAcc,Result).
dependency_insert([],Unit,_,[Unit]).
dependency_insert([X|Xs],Unit,GIDs,L) :-
X = unit(GID,_,_,_),
( memberchk(GID,GIDs) ->
L = [Unit,X|Xs]
;
L = [X | T],
dependency_insert(Xs,Unit,GIDs,T)
).
build_units(Retrievals,Guard,InitialDict,Units) :-
build_retrieval_units(Retrievals,1,N,InitialDict,Dict,Units,Tail),
build_guard_units(Guard,N,Dict,Tail).
build_retrieval_units([],N,N,Dict,Dict,L,L).
build_retrieval_units([U|Us],N,M,Dict,NDict,L,T) :-
term_variables(U,Vs),
update_unit_dictionary(Vs,N,Dict,Dict1,[],GIDs),
L = [unit(N,U,fixed,GIDs)|L1],
N1 is N + 1,
build_retrieval_units(Us,N1,M,Dict1,NDict,L1,T).
initialize_unit_dictionary(Term,Dict) :-
term_variables(Term,Vars),
pair_all_with(Vars,0,Dict).
update_unit_dictionary([],_,Dict,Dict,GIDs,GIDs).
update_unit_dictionary([V|Vs],This,Dict,NDict,GIDs,NGIDs) :-
( lookup_eq(Dict,V,GID) ->
( (GID == This ; memberchk(GID,GIDs) ) ->
GIDs1 = GIDs
;
GIDs1 = [GID|GIDs]
),
Dict1 = Dict
;
Dict1 = [V - This|Dict],
GIDs1 = GIDs
),
update_unit_dictionary(Vs,This,Dict1,NDict,GIDs1,NGIDs).
build_guard_units(Guard,N,Dict,Units) :-
( Guard = [Goal] ->
Units = [unit(N,Goal,fixed,[])]
; Guard = [Goal|Goals] ->
term_variables(Goal,Vs),
update_unit_dictionary2(Vs,N,Dict,NDict,[],GIDs),
Units = [unit(N,Goal,movable,GIDs)|RUnits],
N1 is N + 1,
build_guard_units(Goals,N1,NDict,RUnits)
).
update_unit_dictionary2([],_,Dict,Dict,GIDs,GIDs).
update_unit_dictionary2([V|Vs],This,Dict,NDict,GIDs,NGIDs) :-
( lookup_eq(Dict,V,GID) ->
( (GID == This ; memberchk(GID,GIDs) ) ->
GIDs1 = GIDs
;
GIDs1 = [GID|GIDs]
),
Dict1 = [V - This|Dict]
;
Dict1 = [V - This|Dict],
GIDs1 = GIDs
),
update_unit_dictionary2(Vs,This,Dict1,NDict,GIDs1,NGIDs).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ ____ _ _
%% / ___| ___| |_ / ___| ___ _ __ ___ __ _ _ __ | |_(_) ___ ___ _
%% \___ \ / _ \ __| \___ \ / _ \ '_ ` _ \ / _` | '_ \| __| |/ __/ __(_)
%% ___) | __/ |_ ___) | __/ | | | | | (_| | | | | |_| | (__\__ \_
%% |____/ \___|\__| |____/ \___|_| |_| |_|\__,_|_| |_|\__|_|\___|___(_)
%%
%% _ _ _ ___ __
%% | | | |_ __ (_) __ _ _ _ ___ |_ _|_ __ / _| ___ _ __ ___ _ __ ___ ___
%% | | | | '_ \| |/ _` | | | |/ _ \ | || '_ \| |_ / _ \ '__/ _ \ '_ \ / __/ _ \
%% | |_| | | | | | (_| | |_| | __/ | || | | | _| __/ | | __/ | | | (_| __/
%% \___/|_| |_|_|\__, |\__,_|\___| |___|_| |_|_| \___|_| \___|_| |_|\___\___|
%% |_|
:- chr_constraint
functional_dependency/4,
get_functional_dependency/4.
:- chr_option(mode,functional_dependency(+,+,?,?)).
:- chr_option(mode,get_functional_dependency(+,+,?,?)).
allocation_occurrence(C,AO), occurrence(C,O,RuleNb,_,_) \ functional_dependency(C,RuleNb,Pattern,Key)
<=>
RuleNb > 1, AO > O
|
functional_dependency(C,1,Pattern,Key).
functional_dependency(C,RuleNb1,Pattern,Key) \ get_functional_dependency(C,RuleNb2,QPattern,QKey)
<=>
RuleNb2 >= RuleNb1
|
QPattern = Pattern, QKey = Key.
get_functional_dependency(_,_,_,_)
<=>
fail.
functional_dependency_analysis(Rules) :-
( fail, chr_pp_flag(functional_dependency_analysis,on) ->
functional_dependency_analysis_main(Rules)
;
true
).
functional_dependency_analysis_main([]).
functional_dependency_analysis_main([PRule|PRules]) :-
( discover_unique_pattern(PRule,C,RuleNb,Pattern,Key) ->
functional_dependency(C,RuleNb,Pattern,Key)
;
true
),
functional_dependency_analysis_main(PRules).
discover_unique_pattern(PragmaRule,F/A,RuleNb,Pattern,Key) :-
PragmaRule = pragma(Rule,_,_,Name,RuleNb),
Rule = rule(H1,H2,Guard,_),
( H1 = [C1],
H2 = [C2] ->
true
; H1 = [C1,C2],
H2 == [] ->
true
),
check_unique_constraints(C1,C2,Guard,RuleNb,List),
term_variables(C1,Vs),
\+ (
member(V1,Vs),
lookup_eq(List,V1,V2),
memberchk_eq(V2,Vs)
),
select_pragma_unique_variables(Vs,List,Key1),
copy_term_nat(C1-Key1,Pattern-Key),
functor(C1,F,A).
select_pragma_unique_variables([],_,[]).
select_pragma_unique_variables([V|Vs],List,L) :-
( lookup_eq(List,V,_) ->
L = T
;
L = [V|T]
),
select_pragma_unique_variables(Vs,List,T).
% depends on functional dependency analysis
% and shape of rule: C1 \ C2 <=> true.
set_semantics_rules(Rules) :-
( fail, chr_pp_flag(set_semantics_rule,on) ->
set_semantics_rules_main(Rules)
;
true
).
set_semantics_rules_main([]).
set_semantics_rules_main([R|Rs]) :-
set_semantics_rule_main(R),
set_semantics_rules_main(Rs).
set_semantics_rule_main(PragmaRule) :-
PragmaRule = pragma(Rule,IDs,Pragmas,_,RuleNb),
( Rule = rule([C1],[C2],true,_),
IDs = ids([ID1],[ID2]),
\+ is_passive(RuleNb,ID1),
functor(C1,F,A),
get_functional_dependency(F/A,RuleNb,Pattern,Key),
copy_term_nat(Pattern-Key,C1-Key1),
copy_term_nat(Pattern-Key,C2-Key2),
Key1 == Key2 ->
passive(RuleNb,ID2)
;
true
).
check_unique_constraints(C1,C2,G,RuleNb,List) :-
\+ any_passive_head(RuleNb),
variable_replacement(C1-C2,C2-C1,List),
copy_with_variable_replacement(G,OtherG,List),
negate_b(G,NotG),
once(entails_b(NotG,OtherG)).
% checks for rules of the shape ...,C1,C2... (<|=)=> ...
% where C1 and C2 are symmteric constraints
symmetry_analysis(Rules) :-
( chr_pp_flag(check_unnecessary_active,off) ->
true
;
symmetry_analysis_main(Rules)
).
symmetry_analysis_main([]).
symmetry_analysis_main([R|Rs]) :-
R = pragma(Rule,ids(IDs1,IDs2),_,_,RuleNb),
Rule = rule(H1,H2,_,_),
( ( \+ chr_pp_flag(check_unnecessary_active,simplification) ; H2 == [] ), H1 \== [] ->
symmetry_analysis_heads_simplification(H1,IDs1,[],[],Rule,RuleNb),
symmetry_analysis_heads_propagation(H2,IDs2,[],[],Rule,RuleNb)
;
true
),
symmetry_analysis_main(Rs).
symmetry_analysis_heads_simplification([],[],_,_,_,_).
symmetry_analysis_heads_simplification([H|Hs],[ID|IDs],PreHs,PreIDs,Rule,RuleNb) :-
( \+ is_passive(RuleNb,ID),
member2(PreHs,PreIDs,PreH-PreID),
\+ is_passive(RuleNb,PreID),
variable_replacement(PreH,H,List),
copy_with_variable_replacement(Rule,Rule2,List),
identical_guarded_rules(Rule,Rule2) ->
passive(RuleNb,ID)
;
true
),
symmetry_analysis_heads_simplification(Hs,IDs,[H|PreHs],[ID|PreIDs],Rule,RuleNb).
symmetry_analysis_heads_propagation([],[],_,_,_,_).
symmetry_analysis_heads_propagation([H|Hs],[ID|IDs],PreHs,PreIDs,Rule,RuleNb) :-
( \+ is_passive(RuleNb,ID),
member2(PreHs,PreIDs,PreH-PreID),
\+ is_passive(RuleNb,PreID),
variable_replacement(PreH,H,List),
copy_with_variable_replacement(Rule,Rule2,List),
identical_rules(Rule,Rule2) ->
passive(RuleNb,ID)
;
true
),
symmetry_analysis_heads_propagation(Hs,IDs,[H|PreHs],[ID|PreIDs],Rule,RuleNb).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ _ _ __ _ _ _
%% / ___|(_)_ __ ___ _ __ | (_)/ _(_) ___ __ _| |_(_) ___ _ __
%% \___ \| | '_ ` _ \| '_ \| | | |_| |/ __/ _` | __| |/ _ \| '_ \
%% ___) | | | | | | | |_) | | | _| | (_| (_| | |_| | (_) | | | |
%% |____/|_|_| |_| |_| .__/|_|_|_| |_|\___\__,_|\__|_|\___/|_| |_|
%% |_|
%% {{{
simplification_code(Head,ID,RestHeads,RestIDs,PragmaRule,Symbol,O,Id,L,T) :-
PragmaRule = pragma(Rule,_,Pragmas,_,RuleNb),
head_info1(Head,Symbol,_Vars,Susp,HeadVars,HeadPairs),
build_head(Symbol,Id,HeadVars,ClauseHead),
get_constraint_mode(Symbol,Mode),
head_arg_matches(HeadPairs,Mode,[],FirstMatching,VarDict1,[],GroundVars),
guard_splitting(Rule,GuardList0),
( is_stored_in_guard(Symbol, RuleNb) ->
GuardList = [Hole1|GuardList0]
;
GuardList = GuardList0
),
guard_via_reschedule_new(RestHeads,GuardList,Head,GuardCopyList,GetRestHeads,RescheduledTest),
rest_heads_retrieval_and_matching(RestHeads,RestIDs,Head,GetRestHeads,Susps,VarDict1,VarDict,[],[],[],GroundVars,_),
guard_body_copies3(Rule,GuardList,VarDict,GuardCopyList,BodyCopy),
( is_stored_in_guard(Symbol, RuleNb) ->
gen_occ_allocation_in_guard(Symbol,O,Vars,Susp,Allocation),
gen_uncond_attach_goal(Symbol,Susp,Vars,Attachment,_),
GuardCopyList = [Hole1Copy|_],
Hole1Copy = (Allocation, Attachment)
;
true
),
partner_constraint_detachments(Susps,RestHeads,VarDict,SuspsDetachments),
active_constraint_detachment(Id,Susp,Head,VarDict,SuspDetachment),
( chr_pp_flag(debugable,on) ->
Rule = rule(_,_,Guard,Body),
my_term_copy(Guard - Body, VarDict, DebugGuard - DebugBody),
sort_by_key([Susp|Susps],[ID|RestIDs],SortedSusps),
DebugTry = 'chr debug_event'( try(SortedSusps,[],DebugGuard,DebugBody)),
DebugApply = 'chr debug_event'(apply(SortedSusps,[],DebugGuard,DebugBody)),
instrument_goal(ActualCut,DebugTry,DebugApply,Cut)
;
Cut = ActualCut
),
actual_cut(Symbol,O,ActualCut),
Clause = ( ClauseHead :-
FirstMatching,
RescheduledTest,
Cut,
SuspsDetachments,
SuspDetachment,
BodyCopy
),
add_location(Clause,RuleNb,LocatedClause),
L = [LocatedClause | T].
actual_cut(Symbol,Occurrence,ActualCut) :-
( unconditional_occurrence(Symbol,Occurrence),
chr_pp_flag(late_allocation,on) ->
ActualCut = true
;
ActualCut = (!)
).
% }}}
add_location(Clause,RuleNb,NClause) :-
( chr_pp_flag(line_numbers,on) ->
get_chr_source_file(File),
get_line_number(RuleNb,LineNb),
NClause = '$source_location'(File,LineNb):Clause
;
NClause = Clause
).
add_dummy_location(Clause,NClause) :-
( chr_pp_flag(line_numbers,on) ->
get_chr_source_file(File),
NClause = '$source_location'(File,1):Clause
;
NClause = Clause
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% head_arg_matches(+Pairs,+Modes,+VarDict,-Goal,-NVarDict) is det.
%
% Return goal matching newly introduced variables with variables in
% previously looked-up heads.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
head_arg_matches(Pairs,Modes,VarDict,Goal,NVarDict) :-
head_arg_matches(Pairs,Modes,VarDict,Goal,NVarDict,[],_).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% head_arg_matches(+Pairs,+Modes,+VarDict,-Goal,-NVarDict,+GroundVars,-NGroundVars) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
head_arg_matches(Pairs,Modes,VarDict,Goal,NVarDict,GroundVars,NGroundVars) :-
head_arg_matches_(Pairs,Modes,VarDict,GroundVars,GoalList,NVarDict,NGroundVars),
list2conj(GoalList,Goal).
head_arg_matches_([],[],VarDict,GroundVars,[],VarDict,GroundVars).
head_arg_matches_([silent(Arg-Var)| Rest],[Mode|Modes],VarDict,GroundVars,GoalList,NVarDict,NGroundVars) :- !,
( Mode == (+) ->
term_variables(Arg,GroundVars0,GroundVars),
head_arg_matches_(Rest,Modes,VarDict,GroundVars0,GoalList,NVarDict,NGroundVars)
;
head_arg_matches_(Rest,Modes,VarDict,GroundVars,GoalList,NVarDict,NGroundVars)
).
head_arg_matches_([Arg-Var| Rest],[Mode|Modes],VarDict,GroundVars,GoalList,NVarDict,NGroundVars) :-
( var(Arg) ->
( lookup_eq(VarDict,Arg,OtherVar) ->
( Mode = (+) ->
( memberchk_eq(Arg,GroundVars) ->
GoalList = [Var = OtherVar | RestGoalList],
GroundVars1 = GroundVars
;
GoalList = [Var == OtherVar | RestGoalList],
GroundVars1 = [Arg|GroundVars]
)
;
GoalList = [Var == OtherVar | RestGoalList],
GroundVars1 = GroundVars
),
VarDict1 = VarDict
;
VarDict1 = [Arg-Var | VarDict],
GoalList = RestGoalList,
( Mode = (+) ->
GroundVars1 = [Arg|GroundVars]
;
GroundVars1 = GroundVars
)
),
Pairs = Rest,
RestModes = Modes
; ground(Arg), Arg = '$chr_identifier_match'(ActualArg,IndexType) ->
identifier_label_atom(IndexType,Var,ActualArg,Goal),
GoalList = [Goal|RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; atomic(Arg) ->
( Mode = (+) ->
GoalList = [ Var = Arg | RestGoalList]
;
GoalList = [ Var == Arg | RestGoalList]
),
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Mode == (+), is_ground(GroundVars,Arg) ->
copy_with_variable_replacement(Arg,ArgCopy,VarDict),
GoalList = [ Var = ArgCopy | RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Mode == (?), is_ground(GroundVars,Arg) ->
copy_with_variable_replacement(Arg,ArgCopy,VarDict),
GoalList = [ Var == ArgCopy | RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Arg =.. [_|Args],
functor(Arg,Fct,N),
functor(Term,Fct,N),
Term =.. [_|Vars],
( Mode = (+) ->
GoalList = [ Var = Term | RestGoalList ]
;
GoalList = [ nonvar(Var), Var = Term | RestGoalList ]
),
pairup(Args,Vars,NewPairs),
append(NewPairs,Rest,Pairs),
replicate(N,Mode,NewModes),
append(NewModes,Modes,RestModes),
VarDict1 = VarDict,
GroundVars1 = GroundVars
),
head_arg_matches_(Pairs,RestModes,VarDict1,GroundVars1,RestGoalList,NVarDict,NGroundVars).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% add_heads_types(+ListOfHeads,+VarTypes,-NVarTypes) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
add_heads_types([],VarTypes,VarTypes).
add_heads_types([Head|Heads],VarTypes,NVarTypes) :-
add_head_types(Head,VarTypes,VarTypes1),
add_heads_types(Heads,VarTypes1,NVarTypes).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% add_head_types(+Head,+VarTypes,-NVarTypes) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
add_head_types(Head,VarTypes,NVarTypes) :-
functor(Head,F,A),
get_constraint_type_det(F/A,ArgTypes),
Head =.. [_|Args],
add_args_types(Args,ArgTypes,VarTypes,NVarTypes).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% add_args_types(+Terms,+Types,+VarTypes,-NVarTypes) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
add_args_types([],[],VarTypes,VarTypes).
add_args_types([Arg|Args],[Type|Types],VarTypes,NVarTypes) :-
add_arg_types(Arg,Type,VarTypes,VarTypes1),
add_args_types(Args,Types,VarTypes1,NVarTypes).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% add_arg_types(+Term,+Type,+VarTypes,-NVarTypes) is det.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
% OPTIMIZATION: don't add if `any'
add_arg_types(Term,Type,VarTypes,NVarTypes) :-
( Type == any ->
NVarTypes = VarTypes
; var(Term) ->
( lookup_eq(VarTypes,Term,_) ->
NVarTypes = VarTypes
;
NVarTypes = [Term-Type|VarTypes]
)
; % nonvar
NVarTypes = VarTypes % approximate with any
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% add_heads_ground_variables(+ListOfHeads,+GroundVars,-NGroundVars) is det.
%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
add_heads_ground_variables([],GroundVars,GroundVars).
add_heads_ground_variables([Head|Heads],GroundVars,NGroundVars) :-
add_head_ground_variables(Head,GroundVars,GroundVars1),
add_heads_ground_variables(Heads,GroundVars1,NGroundVars).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% add_head_ground_variables(+Head,+GroundVars,-GroundVars) is det.
%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
add_head_ground_variables(Head,GroundVars,NGroundVars) :-
functor(Head,F,A),
get_constraint_mode(F/A,ArgModes),
Head =.. [_|Args],
add_arg_ground_variables(Args,ArgModes,GroundVars,NGroundVars).
add_arg_ground_variables([],[],GroundVars,GroundVars).
add_arg_ground_variables([Arg|Args],[Mode|Modes],GroundVars,NGroundVars) :-
( Mode == (+) ->
term_variables(Arg,Vars),
add_var_ground_variables(Vars,GroundVars,GroundVars1)
;
GroundVars = GroundVars1
),
add_arg_ground_variables(Args,Modes,GroundVars1,NGroundVars).
add_var_ground_variables([],GroundVars,GroundVars).
add_var_ground_variables([Var|Vars],GroundVars,NGroundVars) :-
( memberchk_eq(Var,GroundVars) ->
GroundVars1 = GroundVars
;
GroundVars1 = [Var|GroundVars]
),
add_var_ground_variables(Vars,GroundVars1,NGroundVars).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% is_ground(+GroundVars,+Term) is semidet.
%
% Determine whether =Term= is always ground.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
is_ground(GroundVars,Term) :-
( ground(Term) ->
true
; compound(Term) ->
Term =.. [_|Args],
maplist(is_ground(GroundVars),Args)
;
memberchk_eq(Term,GroundVars)
).
%% check_ground(+GroundVars,+Term,-Goal) is det.
%
% Return runtime check to see whether =Term= is ground.
check_ground(GroundVars,Term,Goal) :-
term_variables(Term,Variables),
check_ground_variables(Variables,GroundVars,Goal).
check_ground_variables([],_,true).
check_ground_variables([Var|Vars],GroundVars,Goal) :-
( memberchk_eq(Var,GroundVars) ->
check_ground_variables(Vars,GroundVars,Goal)
;
Goal = (ground(Var), RGoal),
check_ground_variables(Vars,GroundVars,RGoal)
).
rest_heads_retrieval_and_matching(Heads,IDs,ActiveHead,GoalList,Susps,VarDict,NVarDict,PrevHs,PrevSusps,AttrDict) :-
rest_heads_retrieval_and_matching(Heads,IDs,ActiveHead,GoalList,Susps,VarDict,NVarDict,PrevHs,PrevSusps,AttrDict,[],_).
rest_heads_retrieval_and_matching(Heads,IDs,ActiveHead,GoalList,Susps,VarDict,NVarDict,PrevHs,PrevSusps,AttrDict,GroundVars,NGroundVars) :-
( Heads = [_|_] ->
rest_heads_retrieval_and_matching_n(Heads,IDs,PrevHs,PrevSusps,ActiveHead,GoalList,Susps,VarDict,NVarDict,AttrDict,GroundVars,NGroundVars)
;
GoalList = [],
Susps = [],
VarDict = NVarDict,
GroundVars = NGroundVars
).
rest_heads_retrieval_and_matching_n([],_,_,_,_,[],[],VarDict,VarDict,_AttrDict,GroundVars,GroundVars).
rest_heads_retrieval_and_matching_n([H|Hs],[ID|IDs],PrevHs,PrevSusps,ActiveHead,
[Goal|Goals],[Susp|Susps],VarDict,NVarDict,_AttrDict,GroundVars,NGroundVars) :-
functor(H,F,A),
head_info(H,A,Vars,_,_,Pairs),
get_store_type(F/A,StoreType),
( StoreType == default ->
passive_head_via(H,[ActiveHead|PrevHs],VarDict,ViaGoal,VarSusps),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,Suspension),
get_static_suspension_term_field(arguments,F/A,Suspension,Vars),
get_static_suspension_field(F/A,Suspension,state,active,GetState)
)
),
% create_get_mutable_ref(active,State,GetMutable),
get_constraint_mode(F/A,Mode),
head_arg_matches(Pairs,Mode,VarDict,MatchingGoal,VarDict1,GroundVars,GroundVars1),
NPairs = Pairs,
sbag_member_call(Susp,VarSusps,Sbag),
ExistentialLookup = (
ViaGoal,
Sbag,
Susp = Suspension, % not inlined
GetState
),
inline_matching_goal(MatchingGoal,MatchingGoal2)
;
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,Suspension),
get_static_suspension_term_field(arguments,F/A,Suspension,Vars)
)
),
existential_lookup(StoreType,H,[ActiveHead|PrevHs],VarDict,GroundVars,Suspension,ExistentialLookup,Susp,Pairs,NPairs),
get_constraint_mode(F/A,Mode),
NMode = Mode, % filter_mode(NPairs,Pairs,Mode,NMode),
head_arg_matches(NPairs,NMode,VarDict,MatchingGoal,VarDict1,GroundVars,GroundVars1),
filter_append(NPairs,VarDict1,DA_), % order important here
translate(GroundVars1,DA_,GroundVarsA),
translate(GroundVars1,VarDict1,GroundVarsB),
inline_matching_goal(MatchingGoal,MatchingGoal2,GroundVarsA,GroundVarsB)
),
different_from_other_susps(H,Susp,PrevHs,PrevSusps,DiffSuspGoals),
Goal =
(
ExistentialLookup,
DiffSuspGoals,
MatchingGoal2
),
rest_heads_retrieval_and_matching_n(Hs,IDs,[H|PrevHs],[Susp|PrevSusps],ActiveHead,Goals,Susps,VarDict1,NVarDict,_NewAttrDict,GroundVars1,NGroundVars).
inline_matching_goal(G1,G2) :-
inline_matching_goal(G1,G2,[],[]).
inline_matching_goal(A==B,true,GVA,GVB) :-
memberchk_eq(A,GVA),
memberchk_eq(B,GVB),
A=B, !.
% inline_matching_goal(A=B,true,_,_) :- A=B, !.
inline_matching_goal((A,B),(A2,B2),GVA,GVB) :- !,
inline_matching_goal(A,A2,GVA,GVB),
inline_matching_goal(B,B2,GVA,GVB).
inline_matching_goal(X,X,_,_).
filter_mode([],_,_,[]).
filter_mode([Arg-Var|Rest],[_-V|R],[M|Ms],Modes) :-
( Var == V ->
Modes = [M|MT],
filter_mode(Rest,R,Ms,MT)
;
filter_mode([Arg-Var|Rest],R,Ms,Modes)
).
filter_append([],VarDict,VarDict).
filter_append([X|Xs],VarDict,NVarDict) :-
( X = silent(_) ->
filter_append(Xs,VarDict,NVarDict)
;
NVarDict = [X|NVarDict0],
filter_append(Xs,VarDict,NVarDict0)
).
check_unique_keys([],_).
check_unique_keys([V|Vs],Dict) :-
lookup_eq(Dict,V,_),
check_unique_keys(Vs,Dict).
% Generates tests to ensure the found constraint differs from previously found constraints
% TODO: detect more cases where constraints need be different
different_from_other_susps(Head,Susp,Heads,Susps,DiffSuspGoals) :-
different_from_other_susps_(Heads,Susps,Head,Susp,DiffSuspGoalList),
list2conj(DiffSuspGoalList,DiffSuspGoals).
different_from_other_susps_(_,[],_,_,[]) :- !.
different_from_other_susps_([PreHead|Heads],[PreSusp|Susps],Head,Susp,List) :-
( functor(Head,F,A), functor(PreHead,F,A),
copy_term_nat(PreHead-Head,PreHeadCopy-HeadCopy),
\+ \+ PreHeadCopy = HeadCopy ->
List = [Susp \== PreSusp | Tail]
;
List = Tail
),
different_from_other_susps_(Heads,Susps,Head,Susp,Tail).
% passive_head_via(in,in,in,in,out,out,out) :-
passive_head_via(Head,PrevHeads,VarDict,Goal,AllSusps) :-
functor(Head,F,A),
get_constraint_index(F/A,Pos),
/* which static variables may contain runtime variables */
common_variables(Head,PrevHeads,CommonVars0),
ground_vars([Head],GroundVars),
list_difference_eq(CommonVars0,GroundVars,CommonVars),
/********************************************************/
global_list_store_name(F/A,Name),
GlobalGoal = nb_getval(Name,AllSusps),
get_constraint_mode(F/A,ArgModes),
( Vars == [] ->
Goal = GlobalGoal
; member(CommonVar,CommonVars), nth1(I,ArgModes,(-)), arg(I,Head,Arg), Arg == CommonVar ->
translate([CommonVar],VarDict,[Var]),
gen_get_mod_constraints(F/A,Var,AttrGoal,AllSusps),
Goal = AttrGoal
;
translate(CommonVars,VarDict,Vars),
add_heads_types(PrevHeads,[],TypeDict),
my_term_copy(TypeDict,VarDict,TypeDictCopy),
gen_get_mod_constraints(F/A,Vars,TypeDictCopy,ViaGoal,AttrGoal,AllSusps),
Goal =
( ViaGoal ->
AttrGoal
;
GlobalGoal
)
).
common_variables(T,Ts,Vs) :-
term_variables(T,V1),
term_variables(Ts,V2),
intersect_eq(V1,V2,Vs).
gen_get_mod_constraints(FA,Vars,TypeDict,ViaGoal,AttrGoal,AllSusps) :-
via_goal(Vars,TypeDict,ViaGoal,Var),
get_target_module(Mod),
AttrGoal =
( get_attr(Var,Mod,TSusps),
TSuspsEqSusps % TSusps = Susps
),
get_max_constraint_index(N),
( N == 1 ->
TSuspsEqSusps = true, % TSusps = Susps
AllSusps = TSusps
;
get_constraint_index(FA,Pos),
get_suspensions(N,Pos,TSusps,TSuspsEqSusps,AllSusps)
).
via_goal(Vars,TypeDict,ViaGoal,Var) :-
( Vars = [] ->
ViaGoal = fail
; Vars = [A] ->
lookup_type(TypeDict,A,Type),
( atomic_type(Type) ->
ViaGoal = var(A),
A = Var
;
ViaGoal = 'chr newvia_1'(A,Var)
)
; Vars = [A,B] ->
ViaGoal = 'chr newvia_2'(A,B,Var)
;
ViaGoal = 'chr newvia'(Vars,Var)
).
lookup_type(TypeDict,Var,Type) :-
( lookup_eq(TypeDict,Var,Type) ->
true
;
Type = any % default type
).
gen_get_mod_constraints(FA,Var,AttrGoal,AllSusps) :-
get_target_module(Mod),
AttrGoal =
( get_attr(Var,Mod,TSusps),
TSuspsEqSusps % TSusps = Susps
),
get_max_constraint_index(N),
( N == 1 ->
TSuspsEqSusps = true, % TSusps = Susps
AllSusps = TSusps
;
get_constraint_index(FA,Pos),
get_suspensions(N,Pos,TSusps,TSuspsEqSusps,AllSusps)
).
guard_body_copies(Rule,VarDict,GuardCopy,BodyCopy) :-
guard_body_copies2(Rule,VarDict,GuardCopyList,BodyCopy),
list2conj(GuardCopyList,GuardCopy).
guard_body_copies2(Rule,VarDict,GuardCopyList,BodyCopy) :-
Rule = rule(_,H,Guard,Body),
conj2list(Guard,GuardList),
split_off_simple_guard(GuardList,VarDict,GuardPrefix,RestGuardList),
my_term_copy(GuardPrefix-RestGuardList,VarDict,VarDict2,GuardPrefixCopy-RestGuardListCopyCore),
append(GuardPrefixCopy,[RestGuardCopy],GuardCopyList),
term_variables(RestGuardList,GuardVars),
term_variables(RestGuardListCopyCore,GuardCopyVars),
% variables that are declared to be ground don't need to be locked
ground_vars(H,GroundVars),
list_difference_eq(GuardVars,GroundVars,LockedGuardVars),
( chr_pp_flag(guard_locks,off) ->
Locks = [],
Unlocks = []
;
bagof(Lock - Unlock,
X ^ Y ^ (lists:member(X,LockedGuardVars), % X is a variable appearing in the original guard
pairlist:lookup_eq(VarDict,X,Y), % translate X into new variable
memberchk_eq(Y,GuardCopyVars), % redundant check? or multiple entries for X possible?
chr_lock(Y,Lock),
chr_unlock(Y,Unlock)
),
LocksUnlocks) ->
once(pairup(Locks,Unlocks,LocksUnlocks))
;
Locks = [],
Unlocks = []
),
list2conj(Locks,LockPhase),
list2conj(Unlocks,UnlockPhase),
list2conj(RestGuardListCopyCore,RestGuardCopyCore),
RestGuardCopy = (LockPhase,(RestGuardCopyCore,UnlockPhase)),
my_term_copy(Body,VarDict2,BodyCopy).
split_off_simple_guard([],_,[],[]).
split_off_simple_guard([G|Gs],VarDict,S,C) :-
( simple_guard(G,VarDict) ->
S = [G|Ss],
split_off_simple_guard(Gs,VarDict,Ss,C)
;
S = [],
C = [G|Gs]
).
% simple guard: cheap and benign (does not bind variables)
simple_guard(G,VarDict) :-
binds_b(G,Vars),
\+ (( member(V,Vars),
lookup_eq(VarDict,V,_)
)).
active_constraint_detachment(Id,Susp,Head,VarDict,SuspDetachment) :-
functor(Head,F,A),
C = F/A,
( is_stored(C) ->
(
(
Id == [0], chr_pp_flag(store_in_guards, off)
;
( get_allocation_occurrence(C,AO),
get_max_occurrence(C,MO),
MO < AO )
),
only_ground_indexed_arguments(C), chr_pp_flag(late_allocation,on) ->
SuspDetachment = true
;
gen_uncond_susp_detachment(Head,Susp,active,VarDict,UnCondSuspDetachment),
( chr_pp_flag(late_allocation,on) ->
SuspDetachment =
( var(Susp) ->
true
;
UnCondSuspDetachment
)
;
SuspDetachment = UnCondSuspDetachment
)
)
;
SuspDetachment = true
).
partner_constraint_detachments([],[],_,true).
partner_constraint_detachments([Susp|Susps],[Head|Heads],VarDict,(SuspDetachment,SuspsDetachments)) :-
gen_uncond_susp_detachment(Head,Susp,partner,VarDict,SuspDetachment),
partner_constraint_detachments(Susps,Heads,VarDict,SuspsDetachments).
gen_uncond_susp_detachment(Head,Susp,Role,VarDict,SuspDetachment) :-
functor(Head,F,A),
C = F/A,
( is_stored(C) ->
SuspDetachment = ( DebugEvent, RemoveInternalGoal),
( chr_pp_flag(debugable,on) ->
DebugEvent = 'chr debug_event'(remove(Susp))
;
DebugEvent = true
),
remove_constraint_goal(C,Susp,Vars,true,(DeleteCall,Detach),Role,RemoveInternalGoal),
delete_constraint_goal(Head,Susp,VarDict,DeleteCall),
( \+ only_ground_indexed_arguments(C), \+ get_store_type(C,var_assoc_store(_,_)) ->
detach_constraint_atom(C,Vars,Susp,Detach)
;
Detach = true
)
;
SuspDetachment = true
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ _ _ _
%% / ___|(_)_ __ ___ _ __ __ _ __ _ __ _| |_(_) ___ _ __ / |
%% \___ \| | '_ ` _ \| '_ \ / _` |/ _` |/ _` | __| |/ _ \| '_ \ | |
%% ___) | | | | | | | |_) | (_| | (_| | (_| | |_| | (_) | | | | | |
%% |____/|_|_| |_| |_| .__/ \__,_|\__, |\__,_|\__|_|\___/|_| |_| |_|
%% |_| |___/
%% {{{
simpagation_head1_code(Head,ID,RestHeads,OtherIDs,PragmaRule,F/A,O,Id,L,T) :-
PragmaRule = pragma(Rule,ids(_,Heads2IDs),Pragmas,_Name,RuleNb),
Rule = rule(_Heads,Heads2,Guard,Body),
head_info(Head,A,Vars,Susp,HeadVars,HeadPairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,[],FirstMatching,VarDict1,[],GroundVars),
build_head(F,A,Id,HeadVars,ClauseHead),
append(RestHeads,Heads2,Heads),
append(OtherIDs,Heads2IDs,IDs),
reorder_heads(RuleNb,Head,Heads,IDs,NHeads,NIDs),
guard_splitting(Rule,GuardList0),
( is_stored_in_guard(F/A, RuleNb) ->
GuardList = [Hole1|GuardList0]
;
GuardList = GuardList0
),
guard_via_reschedule_new(NHeads,GuardList,Head,GuardCopyList,GetRestHeads,RescheduledTest),
rest_heads_retrieval_and_matching(NHeads,NIDs,Head,GetRestHeads,Susps,VarDict1,VarDict,[],[],[],GroundVars,_),
split_by_ids(NIDs,Susps,OtherIDs,Susps1,Susps1IDs,Susps2,Susps2IDs),
guard_body_copies3(Rule,GuardList,VarDict,GuardCopyList,BodyCopy),
( is_stored_in_guard(F/A, RuleNb) ->
gen_uncond_attach_goal(F/A,Susp,Vars,Attachment,_),
GuardCopyList = [Hole1Copy|_],
Hole1Copy = Attachment
;
true
),
sort_by_key(Susps1,Susps1IDs,SortedSusps1),
partner_constraint_detachments(SortedSusps1,RestHeads,VarDict,SuspsDetachments),
active_constraint_detachment(Id,Susp,Head,VarDict,SuspDetachment),
( chr_pp_flag(debugable,on) ->
my_term_copy(Guard - Body, VarDict, DebugGuard - DebugBody),
sort_by_key([Susp|Susps1],[ID|Susps1IDs],RemovedSusps),
sort_by_key(Susps2,Susps2IDs,KeptSusps),
DebugTry = 'chr debug_event'( try(RemovedSusps,KeptSusps,DebugGuard,DebugBody)),
DebugApply = 'chr debug_event'(apply(RemovedSusps,KeptSusps,DebugGuard,DebugBody)),
instrument_goal((!),DebugTry,DebugApply,Cut)
;
Cut = (!)
),
Clause = ( ClauseHead :-
FirstMatching,
RescheduledTest,
Cut,
SuspsDetachments,
SuspDetachment,
BodyCopy
),
add_location(Clause,RuleNb,LocatedClause),
L = [LocatedClause | T].
% }}}
split_by_ids([],[],_,[],[]).
split_by_ids([I|Is],[S|Ss],I1s,S1s,S2s) :-
( memberchk_eq(I,I1s) ->
S1s = [S | R1s],
S2s = R2s
;
S1s = R1s,
S2s = [S | R2s]
),
split_by_ids(Is,Ss,I1s,R1s,R2s).
split_by_ids([],[],_,[],[],[],[]).
split_by_ids([I|Is],[S|Ss],I1s,S1s,SI1s,S2s,SI2s) :-
( memberchk_eq(I,I1s) ->
S1s = [S | R1s],
SI1s = [I|RSI1s],
S2s = R2s,
SI2s = RSI2s
;
S1s = R1s,
SI1s = RSI1s,
S2s = [S | R2s],
SI2s = [I|RSI2s]
),
split_by_ids(Is,Ss,I1s,R1s,RSI1s,R2s,RSI2s).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ _ _ ____
%% / ___|(_)_ __ ___ _ __ __ _ __ _ __ _| |_(_) ___ _ __ |___ \
%% \___ \| | '_ ` _ \| '_ \ / _` |/ _` |/ _` | __| |/ _ \| '_ \ __) |
%% ___) | | | | | | | |_) | (_| | (_| | (_| | |_| | (_) | | | | / __/
%% |____/|_|_| |_| |_| .__/ \__,_|\__, |\__,_|\__|_|\___/|_| |_| |_____|
%% |_| |___/
%% Genereate prelude + worker predicate
%% prelude calls worker
%% worker iterates over one type of removed constraints
simpagation_head2_code(Head2,ID,RestHeads2,RestIDs,PragmaRule,FA,O,Id,L,T) :-
PragmaRule = pragma(Rule,ids(IDs1,IDs2),Pragmas,_Name,RuleNb),
Rule = rule(Heads1,_,Guard,Body),
append(Heads1,RestHeads2,Heads),
append(IDs1,RestIDs,IDs),
reorder_heads(RuleNb,Head2,Heads,IDs,[NHead|NHeads],[NID|NIDs]),
simpagation_head2_prelude(Head2,NHead,[NHeads,Guard,Body],FA,O,Id,L,L1),
extend_id(Id,Id1),
( memberchk_eq(NID,IDs2) ->
simpagation_universal_searches(NHeads,NIDs,IDs2,[NHead,Head2],Rule,FA,O,NextHeads,PreHeads,NextIDs,Id1,Id2,L1,L2)
;
L1 = L2, Id1 = Id2,NextHeads = NHeads, PreHeads = [NHead,Head2], NextIDs = NIDs
),
universal_search_iterator_end(PreHeads,NextHeads,Rule,FA,O,Id2,L2,L3),
simpagation_head2_worker(PreHeads,NextHeads,NextIDs,ID,PragmaRule,FA,O,Id2,L3,T).
simpagation_universal_searches([],[],_,PreHeads,_,_,_,[],PreHeads,[],Id,Id,L,L).
simpagation_universal_searches(Heads,[ID|IDs],IDs2,PreHeads,Rule,C,O,OutHeads,OutPreHeads,OutIDs,Id,NId,L,T) :-
Heads = [Head|RHeads],
inc_id(Id,Id1),
universal_search_iterator_end(PreHeads,Heads,Rule,C,O,Id,L,L0),
universal_search_iterator(Heads,PreHeads,Rule,C,O,Id,L0,L1),
( memberchk_eq(ID,IDs2) ->
simpagation_universal_searches(RHeads,IDs,IDs2,[Head|PreHeads],Rule,C,O,OutHeads,OutPreHeads,OutIDs,Id1,NId,L1,T)
;
NId = Id1, L1 = T, OutHeads = RHeads, OutPreHeads = [Head|PreHeads], IDs = OutIDs
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
simpagation_head2_prelude(Head,Head1,Rest,F/A,O,Id1,L,T) :-
head_info(Head,A,Vars,Susp,VarsSusp,HeadPairs),
build_head(F,A,Id1,VarsSusp,ClauseHead),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,[],FirstMatching,VarDict,[],GroundVars),
lookup_passive_head(Head1,[Head],VarDict,GroundVars,ModConstraintsGoal,AllSusps),
gen_occ_allocation(F/A,O,Vars,Susp,ConstraintAllocationGoal),
extend_id(Id1,DelegateId),
extra_active_delegate_variables(Head,[Head1|Rest],VarDict,ExtraVars),
append([AllSusps|VarsSusp],ExtraVars,DelegateCallVars),
build_head(F,A,[O|DelegateId],DelegateCallVars,Delegate),
PreludeClause =
( ClauseHead :-
FirstMatching,
ModConstraintsGoal,
!,
ConstraintAllocationGoal,
Delegate
),
add_dummy_location(PreludeClause,LocatedPreludeClause),
L = [LocatedPreludeClause|T].
extra_active_delegate_variables(Term,Terms,VarDict,Vars) :-
Term =.. [_|Args],
delegate_variables(Term,Terms,VarDict,Args,Vars).
passive_delegate_variables(Term,PrevTerms,NextTerms,VarDict,Vars) :-
term_variables(PrevTerms,PrevVars),
delegate_variables(Term,NextTerms,VarDict,PrevVars,Vars).
delegate_variables(Term,Terms,VarDict,PrevVars,Vars) :-
term_variables(Term,V1),
term_variables(Terms,V2),
intersect_eq(V1,V2,V3),
list_difference_eq(V3,PrevVars,V4),
translate(V4,VarDict,Vars).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
simpagation_head2_worker([CurrentHead|PreHeads],NextHeads,NextIDs,ID,PragmaRule,F/A,O,Id,L,T) :-
PragmaRule = pragma(Rule,ids(IDs1,_),Pragmas,_,RuleNb),
Rule = rule(_,_,Guard,Body),
get_prop_inner_loop_vars(PreHeads,[CurrentHead,NextHeads,Guard,Body],PreVarsAndSusps,VarDict,Susp,Vars,PreSusps),
gen_var(OtherSusp),
gen_var(OtherSusps),
functor(CurrentHead,OtherF,OtherA),
gen_vars(OtherA,OtherVars),
head_info(CurrentHead,OtherA,OtherVars,OtherSusp,_VarsSusp,HeadPairs),
get_constraint_mode(OtherF/OtherA,Mode),
head_arg_matches(HeadPairs,Mode,VarDict,FirstMatching,VarDict1,[],GroundVars),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(OtherF/OtherA,OtherSuspension),
get_static_suspension_field(OtherF/OtherA,OtherSuspension,state,active,GetState),
get_static_suspension_term_field(arguments,OtherF/OtherA,OtherSuspension,OtherVars)
)
),
% create_get_mutable_ref(active,State,GetMutable),
different_from_other_susps(CurrentHead,OtherSusp,PreHeads,PreSusps,DiffSuspGoals),
CurrentSuspTest = (
OtherSusp = OtherSuspension,
GetState,
DiffSuspGoals,
FirstMatching
),
ClauseVars = [[OtherSusp|OtherSusps]|PreVarsAndSusps],
build_head(F,A,[O|Id],ClauseVars,ClauseHead),
guard_splitting(Rule,GuardList0),
( is_stored_in_guard(F/A, RuleNb) ->
GuardList = [Hole1|GuardList0]
;
GuardList = GuardList0
),
guard_via_reschedule_new(NextHeads,GuardList,[CurrentHead|PreHeads],GuardCopyList,RestSuspsRetrieval,RescheduledTest),
rest_heads_retrieval_and_matching(NextHeads,NextIDs,[CurrentHead|PreHeads],RestSuspsRetrieval,Susps,VarDict1,VarDict2,[CurrentHead|PreHeads],[OtherSusp|PreSusps],[]),
split_by_ids(NextIDs,Susps,IDs1,Susps1,Susps2),
split_by_ids(NextIDs,NextHeads,IDs1,RestHeads1,_),
partner_constraint_detachments([OtherSusp | Susps1],[CurrentHead|RestHeads1],VarDict2,Susps1Detachments),
RecursiveVars = [OtherSusps|PreVarsAndSusps],
build_head(F,A,[O|Id],RecursiveVars,RecursiveCall),
RecursiveVars2 = [[]|PreVarsAndSusps],
build_head(F,A,[O|Id],RecursiveVars2,RecursiveCall2),
guard_body_copies3(Rule,GuardList,VarDict2,GuardCopyList,BodyCopy),
( is_stored_in_guard(F/A, RuleNb) ->
GuardCopyList = [GuardAttachment|_] % once( ) ??
;
true
),
( is_observed(F/A,O) ->
gen_uncond_attach_goal(F/A,Susp,Vars,Attachment,Generation),
gen_state_cond_call(Susp,F/A,RecursiveCall,Generation,ConditionalRecursiveCall),
gen_state_cond_call(Susp,F/A,RecursiveCall2,Generation,ConditionalRecursiveCall2)
;
Attachment = true,
ConditionalRecursiveCall = RecursiveCall,
ConditionalRecursiveCall2 = RecursiveCall2
),
( chr_pp_flag(debugable,on) ->
my_term_copy(Guard - Body, VarDict, DebugGuard - DebugBody),
DebugTry = 'chr debug_event'( try([OtherSusp|Susps1],[Susp|Susps2],DebugGuard,DebugBody)),
DebugApply = 'chr debug_event'(apply([OtherSusp|Susps1],[Susp|Susps2],DebugGuard,DebugBody))
;
DebugTry = true,
DebugApply = true
),
( is_stored_in_guard(F/A, RuleNb) ->
GuardAttachment = Attachment,
BodyAttachment = true
;
GuardAttachment = true,
BodyAttachment = Attachment % will be true if not observed at all
),
( member(unique(ID1,UniqueKeys), Pragmas),
check_unique_keys(UniqueKeys,VarDict) ->
Clause =
( ClauseHead :-
( CurrentSuspTest ->
( RescheduledTest,
DebugTry ->
DebugApply,
Susps1Detachments,
BodyAttachment,
BodyCopy,
ConditionalRecursiveCall2
;
RecursiveCall2
)
;
RecursiveCall
)
)
;
Clause =
( ClauseHead :-
( CurrentSuspTest,
RescheduledTest,
DebugTry ->
DebugApply,
Susps1Detachments,
BodyAttachment,
BodyCopy,
ConditionalRecursiveCall
;
RecursiveCall
)
)
),
add_location(Clause,RuleNb,LocatedClause),
L = [LocatedClause | T].
gen_state_cond_call(Susp,FA,Call,Generation,ConditionalCall) :-
( may_trigger(FA) ->
does_use_field(FA,generation),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(FA,Suspension),
get_update_static_suspension_field(FA,Susp,Suspension,state,active,inactive,GetState,UpdateState),
get_static_suspension_field(FA,Suspension,generation,Generation,GetGeneration),
get_static_suspension_term_field(arguments,FA,Suspension,Args)
)
)
;
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(FA,Suspension),
get_update_static_suspension_field(FA,Susp,Suspension,state,active,inactive,GetState,UpdateState),
get_static_suspension_term_field(arguments,FA,Suspension,Args)
)
),
GetGeneration = true
),
ConditionalCall =
( Susp = Suspension,
GetState,
GetGeneration ->
UpdateState,
Call
;
true
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ _
%% | _ \ _ __ ___ _ __ __ _ __ _ __ _| |_(_) ___ _ __
%% | |_) | '__/ _ \| '_ \ / _` |/ _` |/ _` | __| |/ _ \| '_ \
%% | __/| | | (_) | |_) | (_| | (_| | (_| | |_| | (_) | | | |
%% |_| |_| \___/| .__/ \__,_|\__, |\__,_|\__|_|\___/|_| |_|
%% |_| |___/
propagation_code(Head,ID,RestHeads,RestIDs,Rule,RuleNb,FA,O,Id,L,T) :-
( RestHeads == [] ->
propagation_single_headed(Head,ID,Rule,RuleNb,FA,O,Id,L,T)
;
propagation_multi_headed(Head,RestHeads,RestIDs,Rule,RuleNb,FA,O,Id,L,T)
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Single headed propagation
%% everything in a single clause
propagation_single_headed(Head,ID,Rule,RuleNb,F/A,O,Id,ProgramList,ProgramTail) :-
head_info(Head,A,Vars,Susp,VarsSusp,HeadPairs),
build_head(F,A,Id,VarsSusp,ClauseHead),
inc_id(Id,NextId),
build_head(F,A,NextId,VarsSusp,NextHead),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,[],HeadMatching,VarDict,[],GroundVars),
guard_body_copies(Rule,VarDict,GuardCopy,BodyCopy),
% - recursive call -
RecursiveCall = NextHead,
actual_cut(F/A,O,ActualCut),
Rule = rule(_,_,Guard,Body),
( chr_pp_flag(debugable,on) ->
my_term_copy(Guard - Body, VarDict, DebugGuard - DebugBody),
DebugTry = 'chr debug_event'( try([],[Susp],DebugGuard,DebugBody)),
DebugApply = 'chr debug_event'(apply([],[Susp],DebugGuard,DebugBody)),
instrument_goal(ActualCut,DebugTry,DebugApply,Cut)
;
Cut = ActualCut
),
( may_trigger(F/A), \+ has_no_history(RuleNb)->
use_auxiliary_predicate(novel_production),
use_auxiliary_predicate(extend_history),
does_use_history(F/A,O),
gen_occ_allocation(F/A,O,Vars,Susp,Allocation),
( named_history(RuleNb,HistoryName,HistoryIDs) ->
( HistoryIDs == [] ->
empty_named_history_novel_production(HistoryName,NovelProduction),
empty_named_history_extend_history(HistoryName,ExtendHistory)
;
Tuple = HistoryName
)
;
Tuple = RuleNb
),
( var(NovelProduction) ->
NovelProduction = '$novel_production'(Susp,Tuple),
ExtendHistory = '$extend_history'(Susp,Tuple)
;
true
),
( is_observed(F/A,O) ->
gen_uncond_attach_goal(F/A,Susp,Vars,Attachment,Generation),
gen_state_cond_call(Susp,F/A,RecursiveCall,Generation,ConditionalRecursiveCall)
;
Attachment = true,
ConditionalRecursiveCall = RecursiveCall
)
;
Allocation = true,
NovelProduction = true,
ExtendHistory = true,
( is_observed(F/A,O) ->
get_allocation_occurrence(F/A,AllocO),
( O == AllocO ->
gen_insert_constraint_internal_goal(F/A,Attachment,VarsSusp,Vars,Susp),
Generation = 0
; % more room for improvement?
Attachment = (Attachment1, Attachment2),
gen_occ_allocation(F/A,O,Vars,Susp,Attachment1),
gen_uncond_attach_goal(F/A,Susp,Vars,Attachment2,Generation)
),
gen_state_cond_call(Susp,F/A,RecursiveCall,Generation,ConditionalRecursiveCall)
;
gen_occ_allocation(F/A,O,Vars,Susp,Attachment),
ConditionalRecursiveCall = RecursiveCall
)
),
( is_stored_in_guard(F/A, RuleNb) ->
GuardAttachment = Attachment,
BodyAttachment = true
;
GuardAttachment = true,
BodyAttachment = Attachment % will be true if not observed at all
),
Clause = (
ClauseHead :-
HeadMatching,
Allocation,
NovelProduction,
GuardAttachment,
GuardCopy,
Cut,
ExtendHistory,
BodyAttachment,
BodyCopy,
ConditionalRecursiveCall
),
add_location(Clause,RuleNb,LocatedClause),
ProgramList = [LocatedClause | ProgramTail].
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% multi headed propagation
%% prelude + predicates to accumulate the necessary combinations of suspended
%% constraints + predicate to execute the body
propagation_multi_headed(Head,RestHeads,RestIDs,Rule,RuleNb,FA,O,Id,L,T) :-
RestHeads = [First|Rest],
propagation_prelude(Head,RestHeads,Rule,FA,O,Id,L,L1),
extend_id(Id,ExtendedId),
propagation_nested_code(Rest,[First,Head],RestIDs,Rule,RuleNb,FA,O,ExtendedId,L1,T).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
propagation_prelude(Head,[First|Rest],Rule,F/A,O,Id,L,T) :-
head_info(Head,A,Vars,Susp,VarsSusp,HeadPairs),
build_head(F,A,Id,VarsSusp,PreludeHead),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,[],FirstMatching,VarDict,[],GroundVars),
Rule = rule(_,_,Guard,Body),
extra_active_delegate_variables(Head,[First,Rest,Guard,Body],VarDict,ExtraVars),
lookup_passive_head(First,[Head],VarDict,GroundVars,FirstSuspGoal,Susps),
gen_occ_allocation(F/A,O,Vars,Susp,CondAllocation),
extend_id(Id,NestedId),
append([Susps|VarsSusp],ExtraVars,NestedVars),
build_head(F,A,[O|NestedId],NestedVars,NestedHead),
NestedCall = NestedHead,
Prelude = (
PreludeHead :-
FirstMatching,
FirstSuspGoal,
!,
CondAllocation,
NestedCall
),
add_dummy_location(Prelude,LocatedPrelude),
L = [LocatedPrelude|T].
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
propagation_nested_code([],[CurrentHead|PreHeads],RestIDs,Rule,RuleNb,FA,O,Id,L,T) :-
universal_search_iterator_end([CurrentHead|PreHeads],[],Rule,FA,O,Id,L,L1),
propagation_body(CurrentHead,PreHeads,RestIDs,Rule,RuleNb,FA,O,Id,L1,T).
propagation_nested_code([Head|RestHeads],PreHeads,RestIDs,Rule,RuleNb,FA,O,Id,L,T) :-
universal_search_iterator_end(PreHeads,[Head|RestHeads],Rule,FA,O,Id,L,L1),
universal_search_iterator([Head|RestHeads],PreHeads,Rule,FA,O,Id,L1,L2),
inc_id(Id,IncId),
propagation_nested_code(RestHeads,[Head|PreHeads],RestIDs,Rule,RuleNb,FA,O,IncId,L2,T).
%check_fd_lookup_condition(_,_,_,_) :- fail.
check_fd_lookup_condition(F,A,_,_) :-
get_store_type(F/A,global_singleton), !.
check_fd_lookup_condition(F,A,CurrentHead,PreHeads) :-
\+ may_trigger(F/A),
get_functional_dependency(F/A,1,P,K),
copy_term(P-K,CurrentHead-Key),
term_variables(PreHeads,PreVars),
intersect_eq(Key,PreVars,Key),!.
propagation_body(CurrentHead,PreHeads,RestIDs,Rule,RuleNb,F/A,O,Id,L,T) :-
Rule = rule(_,H2,Guard,Body),
gen_var_susp_list_for_b(PreHeads,[CurrentHead,Guard,Body],VarDict1,PreVarsAndSuspsList,FirstVarsSusp,AllSusps,PrevIterators),
flatten(PreVarsAndSuspsList,PreVarsAndSusps),
init(AllSusps,RestSusps),
last(AllSusps,Susp),
gen_var(OtherSusp),
gen_var(OtherSusps),
functor(CurrentHead,OtherF,OtherA),
gen_vars(OtherA,OtherVars),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(OtherF/OtherA,Suspension),
get_static_suspension_field(OtherF/OtherA,Suspension,state,active,GetState),
get_static_suspension_term_field(arguments,OtherF/OtherA,Suspension,OtherVars)
)
),
% create_get_mutable_ref(active,State,GetMutable),
CurrentSuspTest = (
OtherSusp = Suspension,
GetState
),
ClauseVars = [[OtherSusp|OtherSusps]|PreVarsAndSusps],
build_head(F,A,[O|Id],ClauseVars,ClauseHead),
( check_fd_lookup_condition(OtherF,OtherA,CurrentHead,PreHeads) -> % iterator (OtherSusps) is empty at runtime
universal_search_iterator_failure_vars(PreHeads,Id,PreVarsAndSuspsList,FirstVarsSusp,PrevIterators,PreVarsAndSusps1,PrevId0),
RecursiveVars = PreVarsAndSusps1
;
RecursiveVars = [OtherSusps|PreVarsAndSusps],
PrevId0 = Id
),
( PrevId0 = [_] ->
PrevId = PrevId0
;
PrevId = [O|PrevId0]
),
build_head(F,A,PrevId,RecursiveVars,RecursiveHead),
RecursiveCall = RecursiveHead,
CurrentHead =.. [_|OtherArgs],
pairup(OtherArgs,OtherVars,OtherPairs),
get_constraint_mode(OtherF/OtherA,Mode),
head_arg_matches(OtherPairs,Mode,VarDict1,Matching,VarDict),
different_from_other_susps(CurrentHead,OtherSusp,PreHeads,RestSusps,DiffSuspGoals),
guard_body_copies(Rule,VarDict,GuardCopy,BodyCopy),
get_occurrence(F/A,O,_,ID),
( is_observed(F/A,O) ->
init(FirstVarsSusp,FirstVars),
gen_uncond_attach_goal(F/A,Susp,FirstVars,Attachment,Generation),
gen_state_cond_call(Susp,F/A,RecursiveCall,Generation,ConditionalRecursiveCall)
;
Attachment = true,
ConditionalRecursiveCall = RecursiveCall
),
( (is_least_occurrence(RuleNb) ; has_no_history(RuleNb)) ->
NovelProduction = true,
ExtendHistory = true
; \+ may_trigger(F/A), maplist(is_passive(RuleNb),RestIDs) ->
NovelProduction = true,
ExtendHistory = true
;
get_occurrence(F/A,O,_,ID),
use_auxiliary_predicate(novel_production),
use_auxiliary_predicate(extend_history),
does_use_history(F/A,O),
( named_history(RuleNb,HistoryName,HistoryIDs) ->
( HistoryIDs == [] ->
empty_named_history_novel_production(HistoryName,NovelProduction),
empty_named_history_extend_history(HistoryName,ExtendHistory)
;
reverse([OtherSusp|RestSusps],NamedSusps),
named_history_susps(HistoryIDs,[ID|RestIDs],[Susp|NamedSusps],HistorySusps),
HistorySusps = [HistorySusp|_],
( length(HistoryIDs, 1) ->
ExtendHistory = '$extend_history'(HistorySusp,HistoryName),
NovelProduction = '$novel_production'(HistorySusp,HistoryName)
;
findall(ConstraintSymbol,(member(SomeID,HistoryIDs),get_occurrence_from_id(ConstraintSymbol,_,RuleNb,SomeID)),ConstraintSymbols),
Tuple =.. [t,HistoryName|HistorySusps]
)
)
;
HistorySusp = Susp,
maplist(extract_symbol,H2,ConstraintSymbols),
sort([ID|RestIDs],HistoryIDs),
history_susps(RestIDs,[OtherSusp|RestSusps],Susp,ID,HistorySusps),
Tuple =.. [t,RuleNb|HistorySusps]
),
( var(NovelProduction) ->
novel_production_calls(ConstraintSymbols,HistoryIDs,HistorySusps,RuleNb,TupleVar,NovelProductions),
ExtendHistory = '$extend_history'(HistorySusp,TupleVar),
NovelProduction = ( TupleVar = Tuple, NovelProductions )
;
true
)
),
( chr_pp_flag(debugable,on) ->
Rule = rule(_,_,Guard,Body),
my_term_copy(Guard - Body, VarDict, DebugGuard - DebugBody),
get_occurrence(F/A,O,_,ID),
sort_by_key([Susp,OtherSusp|RestSusps],[ID|RestIDs],KeptSusps),
DebugTry = 'chr debug_event'( try([],KeptSusps,DebugGuard,DebugBody)),
DebugApply = 'chr debug_event'(apply([],KeptSusps,DebugGuard,DebugBody))
;
DebugTry = true,
DebugApply = true
),
( is_stored_in_guard(F/A, RuleNb) ->
GuardAttachment = Attachment,
BodyAttachment = true
;
GuardAttachment = true,
BodyAttachment = Attachment % will be true if not observed at all
),
Clause = (
ClauseHead :-
( CurrentSuspTest,
DiffSuspGoals,
Matching,
NovelProduction,
GuardAttachment,
GuardCopy,
DebugTry ->
DebugApply,
ExtendHistory,
BodyAttachment,
BodyCopy,
ConditionalRecursiveCall
; RecursiveCall
)
),
add_location(Clause,RuleNb,LocatedClause),
L = [LocatedClause|T].
extract_symbol(Head,F/A) :-
functor(Head,F,A).
novel_production_calls([],[],[],_,_,true).
novel_production_calls([ConstraintSymbol|ConstraintSymbols],[ID|IDs],[Suspension|Suspensions],RuleNb,Tuple,(Goal,Goals)) :-
get_occurrence_from_id(ConstraintSymbol,Occurrence,RuleNb,ID),
delay_phase_end(validate_store_type_assumptions,novel_production_call(ConstraintSymbol,Occurrence,'$novel_production'(Suspension,Tuple),Goal)),
novel_production_calls(ConstraintSymbols,IDs,Suspensions,RuleNb,Tuple,Goals).
history_susps(RestIDs,ReversedRestSusps,Susp,ID,HistorySusps) :-
reverse(ReversedRestSusps,RestSusps),
sort_by_key([Susp|RestSusps],[ID|RestIDs],HistorySusps).
named_history_susps([],_,_,[]).
named_history_susps([HistoryID|HistoryIDs],IDs,Susps,[HistorySusp|HistorySusps]) :-
select2(HistoryID,HistorySusp,IDs,Susps,RestIDs,RestSusps), !,
named_history_susps(HistoryIDs,RestIDs,RestSusps,HistorySusps).
gen_var_susp_list_for([Head],Terms,VarDict,HeadVars,VarsSusp,Susp) :-
!,
functor(Head,F,A),
head_info(Head,A,_Vars,Susp,VarsSusp,HeadPairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,[],_,VarDict),
extra_active_delegate_variables(Head,Terms,VarDict,ExtraVars),
append(VarsSusp,ExtraVars,HeadVars).
gen_var_susp_list_for([Head|Heads],Terms,NVarDict,VarsSusps,Rest,Susps) :-
gen_var_susp_list_for(Heads,[Head|Terms],VarDict,Rest,_,_),
functor(Head,F,A),
gen_var(Susps),
head_info(Head,A,_Vars,Susp,_VarsSusp,HeadPairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,VarDict,_,NVarDict),
passive_delegate_variables(Head,Heads,Terms,NVarDict,HeadVars),
append(HeadVars,[Susp,Susps|Rest],VarsSusps).
% returns
% VarDict for the copies of variables in the original heads
% VarsSuspsList list of lists of arguments for the successive heads
% FirstVarsSusp top level arguments
% SuspList list of all suspensions
% Iterators list of all iterators
gen_var_susp_list_for_b([Head],NextHeads,VarDict,[HeadVars],VarsSusp,[Susp],[]) :-
!,
functor(Head,F,A),
head_info(Head,A,_Vars,Susp,VarsSusp,Pairs), % make variables for argument positions
get_constraint_mode(F/A,Mode),
head_arg_matches(Pairs,Mode,[],_,VarDict), % copy variables inside arguments, build dictionary
extra_active_delegate_variables(Head,NextHeads,VarDict,ExtraVars), % decide what additional variables are needed
append(VarsSusp,ExtraVars,HeadVars). % add additional variables to head variables
gen_var_susp_list_for_b([Head|Heads],NextHeads,NVarDict,[Vars|RestVars],FirstVarsSusp,[Susp|SuspList],[Susps|Iterators]) :-
gen_var_susp_list_for_b(Heads,[Head|NextHeads],VarDict,RestVars,FirstVarsSusp,SuspList,Iterators),
functor(Head,F,A),
gen_var(Susps),
head_info(Head,A,_Vars,Susp,_VarsSusp,HeadPairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(HeadPairs,Mode,VarDict,_,NVarDict),
passive_delegate_variables(Head,Heads,NextHeads,NVarDict,HeadVars),
append(HeadVars,[Susp,Susps],Vars).
get_prop_inner_loop_vars([Head],NextHeads,HeadVars,VarDict,Susp,Vars,[]) :-
!,
functor(Head,F,A),
head_info(Head,A,Vars,Susp,VarsSusp,Pairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(Pairs,Mode,[],_,VarDict),
extra_active_delegate_variables(Head,NextHeads,VarDict,ExtraVars),
append(VarsSusp,ExtraVars,HeadVars).
get_prop_inner_loop_vars([Head|Heads],Terms,VarsSusps,NVarDict,MainSusp,MainVars,[Susp|RestSusps]) :-
get_prop_inner_loop_vars(Heads,[Head|Terms],RestVarsSusp,VarDict,MainSusp,MainVars,RestSusps),
functor(Head,F,A),
gen_var(Susps),
head_info(Head,A,_Vars,Susp,_VarsSusp,Pairs),
get_constraint_mode(F/A,Mode),
head_arg_matches(Pairs,Mode,VarDict,_,NVarDict),
passive_delegate_variables(Head,Heads,Terms,NVarDict,HeadVars),
append(HeadVars,[Susp,Susps|RestVarsSusp],VarsSusps).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ____ _ _ _ _
%% | _ \ __ _ ___ ___(_)_ _____ | | | | ___ __ _ __| |
%% | |_) / _` / __/ __| \ \ / / _ \ | |_| |/ _ \/ _` |/ _` |
%% | __/ (_| \__ \__ \ |\ V / __/ | _ | __/ (_| | (_| |
%% |_| \__,_|___/___/_| \_/ \___| |_| |_|\___|\__,_|\__,_|
%%
%% ____ _ _ _
%% | _ \ ___| |_ _ __(_) _____ ____ _| |
%% | |_) / _ \ __| '__| |/ _ \ \ / / _` | |
%% | _ < __/ |_| | | | __/\ V / (_| | |
%% |_| \_\___|\__|_| |_|\___| \_/ \__,_|_|
%%
%% ____ _ _
%% | _ \ ___ ___ _ __ __| | ___ _ __(_)_ __ __ _
%% | |_) / _ \/ _ \| '__/ _` |/ _ \ '__| | '_ \ / _` |
%% | _ < __/ (_) | | | (_| | __/ | | | | | | (_| |
%% |_| \_\___|\___/|_| \__,_|\___|_| |_|_| |_|\__, |
%% |___/
reorder_heads(RuleNb,Head,RestHeads,RestIDs,NRestHeads,NRestIDs) :-
( chr_pp_flag(reorder_heads,on), length(RestHeads,Length), Length =< 6 ->
reorder_heads_main(RuleNb,Head,RestHeads,RestIDs,NRestHeads,NRestIDs)
;
NRestHeads = RestHeads,
NRestIDs = RestIDs
).
reorder_heads_main(RuleNb,Head,RestHeads,RestIDs,NRestHeads,NRestIDs) :-
term_variables(Head,Vars),
InitialData = entry([],[],Vars,RestHeads,RestIDs,RuleNb),
copy_term_nat(InitialData,InitialDataCopy),
a_star(InitialDataCopy,FD^(chr_translate:final_data(FD)),N^EN^C^(chr_translate:expand_data(N,EN,C)),FinalData),
InitialDataCopy = InitialData,
FinalData = entry(RNRestHeads,RNRestIDs,_,_,_,_),
reverse(RNRestHeads,NRestHeads),
reverse(RNRestIDs,NRestIDs).
final_data(Entry) :-
Entry = entry(_,_,_,_,[],_).
expand_data(Entry,NEntry,Cost) :-
Entry = entry(Heads,IDs,Vars,NHeads,NIDs,RuleNb),
select2(Head1,ID1,NHeads,NIDs,NHeads1,NIDs1),
term_variables([Head1|Vars],Vars1),
NEntry = entry([Head1|Heads],[ID1|IDs],Vars1,NHeads1,NIDs1,RuleNb),
order_score(Head1,ID1,Vars,NHeads1,RuleNb,Cost).
% Assigns score to head based on known variables and heads to lookup
% order_score(+head,+id,+knownvars,+heads,+rule_nb,-score). {{{
order_score(Head,ID,KnownVars,RestHeads,RuleNb,Score) :-
functor(Head,F,A),
get_store_type(F/A,StoreType),
order_score(StoreType,Head,ID,KnownVars,RestHeads,RuleNb,99999,Score).
% }}}
%% order_score(+store+_type,+head,+id,+vars,+heads,+rule_nb,+score,-score) {{{
order_score(default,Head,_ID,KnownVars,RestHeads,RuleNb,CScore,NScore) :-
term_variables(Head,HeadVars0),
term_variables(RestHeads,RestVars),
ground_vars([Head],GroundVars),
list_difference_eq(HeadVars0,GroundVars,HeadVars),
order_score_vars(HeadVars,KnownVars,RestVars,Score),
NScore is min(CScore,Score).
order_score(multi_inthash(Indexes),Head,_ID,KnownVars,RestHeads,RuleNb,CScore,Score) :-
( CScore =< 100 ->
Score = CScore
;
order_score_indexes(Indexes,Head,KnownVars,Score)
).
order_score(multi_hash(Indexes),Head,_ID,KnownVars,RestHeads,RuleNb,CScore,Score) :-
( CScore =< 100 ->
Score = CScore
;
order_score_indexes(Indexes,Head,KnownVars,Score)
).
order_score(global_ground,Head,ID,KnownVars,RestHeads,RuleNb,CScore,NScore) :-
term_variables(Head,HeadVars),
term_variables(RestHeads,RestVars),
order_score_vars(HeadVars,KnownVars,RestVars,Score_),
Score is Score_ * 200,
NScore is min(CScore,Score).
order_score(var_assoc_store(_,_),_,_,_,_,_,_,1).
order_score(global_singleton,_Head,ID,_KnownVars,_RestHeads,_RuleNb,_,Score) :-
Score = 1. % guaranteed O(1)
order_score(multi_store(StoreTypes),Head,ID,KnownVars,RestHeads,RuleNb,CScore,Score) :-
multi_order_score(StoreTypes,Head,ID,KnownVars,RestHeads,RuleNb,CScore,Score).
multi_order_score([],_,_,_,_,_,Score,Score).
multi_order_score([StoreType|StoreTypes],Head,ID,KnownVars,RestHeads,RuleNb,Score0,Score) :-
( order_score(StoreType,Head,ID,KnownVars,RestHeads,RuleNb,Score0,Score1) -> true
; Score1 = Score0
),
multi_order_score(StoreTypes,Head,ID,KnownVars,RestHeads,RuleNb,Score1,Score).
order_score(identifier_store(Index),Head,ID,KnownVars,RestHeads,RuleNb,CScore,Score) :-
arg(Index,Head,Arg),
memberchk_eq(Arg,KnownVars),
Score is min(CScore,10).
order_score(type_indexed_identifier_store(Index,_),Head,ID,KnownVars,RestHeads,RuleNb,CScore,Score) :-
arg(Index,Head,Arg),
memberchk_eq(Arg,KnownVars),
Score is min(CScore,10).
% }}}
%% order_score_indexes(+indexes,+head,+vars,-score). {{{
order_score_indexes(Indexes,Head,Vars,Score) :-
copy_term_nat(Head+Vars,HeadCopy+VarsCopy),
numbervars(VarsCopy,0,_),
order_score_indexes(Indexes,HeadCopy,Score).
order_score_indexes([I|Is],Head,Score) :-
args(I,Head,Args),
( maplist(ground,Args) /* forall(Arg,Args,memberchk_eq(Arg,KnownVars)) */ ->
Score = 100
;
order_score_indexes(Is,Head,Score)
).
% }}}
memberchk_eq_flip(List,Element) :- memberchk_eq(Element,List).
order_score_vars(Vars,KnownVars,RestVars,Score) :-
order_score_count_vars(Vars,KnownVars,RestVars,K-R-O),
( K-R-O == 0-0-0 ->
Score = 0
; K > 0 ->
Score is max(10 - K,0)
; R > 0 ->
Score is max(10 - R,1) * 100
;
Score is max(10-O,1) * 1000
).
order_score_count_vars([],_,_,0-0-0).
order_score_count_vars([V|Vs],KnownVars,RestVars,NK-NR-NO) :-
order_score_count_vars(Vs,KnownVars,RestVars,K-R-O),
( memberchk_eq(V,KnownVars) ->
NK is K + 1,
NR = R, NO = O
; memberchk_eq(V,RestVars) ->
NR is R + 1,
NK = K, NO = O
;
NO is O + 1,
NK = K, NR = R
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% ___ _ _ _
%% |_ _|_ __ | (_)_ __ (_)_ __ __ _
%% | || '_ \| | | '_ \| | '_ \ / _` |
%% | || | | | | | | | | | | | | (_| |
%% |___|_| |_|_|_|_| |_|_|_| |_|\__, |
%% |___/
%% SWI begin
create_get_mutable_ref(V,M,GM) :- GM = (M = mutable(V)).
create_get_mutable(V,M,GM) :- M = mutable(V), GM = true.
%% SWI end
%% SICStus begin
%% create_get_mutable(V,M,GM) :- GM = get_mutable(V,M).
%% create_get_mutable_ref(V,M,GM) :- GM = get_mutable(V,M).
%% SICStus end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% _ _ _ _ _ _ _
%% | | | | |_(_) (_) |_ _ _
%% | | | | __| | | | __| | | |
%% | |_| | |_| | | | |_| |_| |
%% \___/ \__|_|_|_|\__|\__, |
%% |___/
% Create a fresh variable.
gen_var(_).
% Create =N= fresh variables.
gen_vars(N,Xs) :-
length(Xs,N).
ast_head_info1(AstHead,Vars,Susp,VarsSusp,HeadPairs) :-
AstHead = chr_constraint(_/A,Args,_),
vars_susp(A,Vars,Susp,VarsSusp),
pairup(Args,Vars,HeadPairs).
head_info1(Head,_/A,Vars,Susp,VarsSusp,HeadPairs) :-
vars_susp(A,Vars,Susp,VarsSusp),
Head =.. [_|Args],
pairup(Args,Vars,HeadPairs).
head_info(Head,A,Vars,Susp,VarsSusp,HeadPairs) :-
vars_susp(A,Vars,Susp,VarsSusp),
Head =.. [_|Args],
pairup(Args,Vars,HeadPairs).
inc_id([N|Ns],[O|Ns]) :-
O is N + 1.
dec_id([N|Ns],[M|Ns]) :-
M is N - 1.
extend_id(Id,[0|Id]).
next_id([_,N|Ns],[O|Ns]) :-
O is N + 1.
% return clause Head
% for F/A constraint symbol, predicate identifier Id and arguments Head
build_head(F/A,Id,Args,Head) :-
build_head(F,A,Id,Args,Head).
build_head(F,A,Id,Args,Head) :-
buildName(F,A,Id,Name),
( (chr_pp_flag(debugable,on) ; is_stored(F/A), ( has_active_occurrence(F/A) ; chr_pp_flag(late_allocation,off)),
( may_trigger(F/A) ;
get_allocation_occurrence(F/A,AO),
get_max_occurrence(F/A,MO),
MO >= AO ) ) ->
Head =.. [Name|Args]
;
init(Args,ArgsWOSusp), % XXX not entirely correct!
Head =.. [Name|ArgsWOSusp]
).
% return predicate name Result
% for Fct/Aty constraint symbol and predicate identifier List
buildName(Fct,Aty,List,Result) :-
( (chr_pp_flag(debugable,on) ; (once((is_stored(Fct/Aty), ( has_active_occurrence(Fct/Aty) ; chr_pp_flag(late_allocation,off)),
( may_trigger(Fct/Aty) ; get_allocation_occurrence(Fct/Aty,AO), get_max_occurrence(Fct/Aty,MO),
MO >= AO ) ; List \= [0])) ) ) ->
atom_concat(Fct, '___' ,FctSlash),
atomic_concat(FctSlash,Aty,FctSlashAty),
buildName_(List,FctSlashAty,Result)
;
Result = Fct
).
buildName_([],Name,Name).
buildName_([N|Ns],Name,Result) :-
buildName_(Ns,Name,Name1),
atom_concat(Name1,'__',NameDash), % '_' is a char :-(
atomic_concat(NameDash,N,Result).
vars_susp(A,Vars,Susp,VarsSusp) :-
length(Vars,A),
append(Vars,[Susp],VarsSusp).
or_pattern(Pos,Pat) :-
Pow is Pos - 1,
Pat is 1 << Pow. % was 2 ** X
and_pattern(Pos,Pat) :-
X is Pos - 1,
Y is 1 << X, % was 2 ** X
Pat is (-1)*(Y + 1).
make_name(Prefix,F/A,Name) :-
atom_concat_list([Prefix,F,'___',A],Name).
%===============================================================================
% Attribute for attributed variables
make_attr(N,Mask,SuspsList,Attr) :-
length(SuspsList,N),
Attr =.. [v,Mask|SuspsList].
get_all_suspensions2(N,Attr,SuspensionsList) :-
chr_pp_flag(dynattr,off), !,
make_attr(N,_,SuspensionsList,Attr).
% NEW
get_all_suspensions2(N,Attr,Goal,SuspensionsList) :-
% writeln(get_all_suspensions2),
length(SuspensionsList,N),
Goal = 'chr all_suspensions'(SuspensionsList,1,Attr).
% NEW
normalize_attr(Attr,NormalGoal,NormalAttr) :-
% writeln(normalize_attr),
NormalGoal = 'chr normalize_attr'(Attr,NormalAttr).
get_suspensions(N,Position,TAttr,(TAttr = Attr),Suspensions) :-
chr_pp_flag(dynattr,off),
!, % chr_pp_flag(experiment,off), !,
make_attr(N,_,SuspsList,Attr),
nth1(Position,SuspsList,Suspensions).
% get_suspensions(N,Position,TAttr,Goal,Suspensions) :-
% chr_pp_flag(dynattr,off),
% chr_pp_flag(experiment,on), !,
% Position1 is Position + 1,
% Goal = arg(Position1,TAttr,Suspensions).
% NEW
get_suspensions(N,Position,TAttr,Goal,Suspensions) :-
% writeln(get_suspensions),
Goal =
( memberchk(Position-Suspensions,TAttr) ->
true
;
Suspensions = []
).
%-------------------------------------------------------------------------------
% +N: number of constraint symbols
% +Suspension: source-level variable, for suspension
% +Position: constraint symbol number
% -Attr: source-level term, for new attribute
singleton_attr(N,Suspension,Position,Attr) :-
chr_pp_flag(dynattr,off), !,
or_pattern(Position,Pattern),
make_attr(N,Pattern,SuspsList,Attr),
nth1(Position,SuspsList,[Suspension],RestSuspsList),
set_elems(RestSuspsList,[]).
% NEW
singleton_attr(N,Suspension,Position,Attr) :-
% writeln(singleton_attr),
Attr = [Position-[Suspension]].
%-------------------------------------------------------------------------------
% +N: number of constraint symbols
% +Suspension: source-level variable, for suspension
% +Position: constraint symbol number
% +TAttr: source-level variable, for old attribute
% -Goal: goal for creating new attribute
% -NTAttr: source-level variable, for new attribute
add_attr(N,Suspension,Position,TAttr,Goal,NTAttr) :-
chr_pp_flag(dynattr,off), !,
make_attr(N,Mask,SuspsList,Attr),
or_pattern(Position,Pattern),
nth1(Position,SuspsList,Susps),
substitute_eq(Susps,SuspsList,[Suspension|Susps],SuspsList1),
make_attr(N,Mask,SuspsList1,NewAttr1),
substitute_eq(Susps,SuspsList,[Suspension],SuspsList2),
make_attr(N,NewMask,SuspsList2,NewAttr2),
Goal = (
TAttr = Attr,
( Mask /\ Pattern =:= Pattern ->
NTAttr = NewAttr1
;
NewMask is Mask \/ Pattern,
NTAttr = NewAttr2
)
), !.
% NEW
add_attr(N,Suspension,Position,TAttr,Goal,NTAttr) :-
% writeln(add_attr),
Goal =
( 'chr select'(TAttr,Position-Suspensions,RAttr) ->
NTAttr = [Position-[Suspension|Suspensions]|RAttr]
;
NTAttr = [Position-[Suspension]|TAttr]
).
rem_attr(N,Var,Suspension,Position,TAttr,Goal) :-
chr_pp_flag(dynattr,off),
chr_pp_flag(experiment,off), !,
or_pattern(Position,Pattern),
and_pattern(Position,DelPattern),
make_attr(N,Mask,SuspsList,Attr),
nth1(Position,SuspsList,Susps),
substitute_eq(Susps,SuspsList,[],SuspsList1),
make_attr(N,NewMask,SuspsList1,Attr1),
substitute_eq(Susps,SuspsList,NewSusps,SuspsList2),
make_attr(N,Mask,SuspsList2,Attr2),
get_target_module(Mod),
Goal = (
TAttr = Attr,
( Mask /\ Pattern =:= Pattern ->
'chr sbag_del_element'(Susps,Suspension,NewSusps),
( NewSusps == [] ->
NewMask is Mask /\ DelPattern,
( NewMask == 0 ->
del_attr(Var,Mod)
;
put_attr(Var,Mod,Attr1)
)
;
put_attr(Var,Mod,Attr2)
)
;
true
)
), !.
rem_attr(N,Var,Suspension,Position,TAttr,Goal) :-
chr_pp_flag(dynattr,off),
chr_pp_flag(experiment,on), !,
or_pattern(Position,Pattern),
and_pattern(Position,DelPattern),
Position1 is Position + 1,
get_target_module(Mod),
Goal = (
arg(1,TAttr,Mask),
( Mask /\ Pattern =:= Pattern ->
arg(Position1,TAttr,Susps),
'chr sbag_del_element'(Susps,Suspension,NewSusps),
( NewSusps == [] ->
NewMask is Mask /\ DelPattern,
( NewMask == 0 ->
del_attr(Var,Mod)
;
setarg(1,TAttr,NewMask),
setarg(Position1,TAttr,NewSusps)
)
;
setarg(Position1,TAttr,NewSusps)
)
;
true
)
), !.
% NEW
rem_attr(N,Var,Suspension,Position,TAttr,Goal) :-
% writeln(rem_attr),
get_target_module(Mod),
Goal =
( 'chr select'(TAttr,Position-Suspensions,RAttr) ->
'chr sbag_del_element'(Suspensions,Suspension,NSuspensions),
( NSuspensions == [] ->
( RAttr == [] ->
del_attr(Var,Mod)
;
put_attr(Var,Mod,RAttr)
)
;
put_attr(Var,Mod,[Position-NSuspensions|RAttr])
)
;
true
).
%-------------------------------------------------------------------------------
% +N: number of constraint symbols
% +TAttr1: source-level variable, for attribute
% +TAttr2: source-level variable, for other attribute
% -Goal: goal for merging the two attributes
% -Attr: source-level term, for merged attribute
merge_attributes(N,TAttr1,TAttr2,Goal,Attr) :-
chr_pp_flag(dynattr,off), !,
make_attr(N,Mask1,SuspsList1,Attr1),
merge_attributes2(N,Mask1,SuspsList1,TAttr2,Goal2,Attr),
Goal = (
TAttr1 = Attr1,
Goal2
).
% NEW
merge_attributes(N,TAttr1,TAttr2,Goal,Attr) :-
% writeln(merge_attributes),
Goal = (
sort(TAttr1,Sorted1),
sort(TAttr2,Sorted2),
'chr new_merge_attributes'(Sorted1,Sorted2,Attr)
).
%-------------------------------------------------------------------------------
% +N: number of constraint symbols
% +Mask1: ...
% +SuspsList1: static term, for suspensions list
% +TAttr2: source-level variable, for other attribute
% -Goal: goal for merging the two attributes
% -Attr: source-level term, for merged attribute
merge_attributes2(N,Mask1,SuspsList1,TAttr2,Goal,Attr) :-
make_attr(N,Mask2,SuspsList2,Attr2),
bagof(G,X ^ Y ^ SY ^ M ^ (member2(SuspsList1,SuspsList2,X-Y),G = (sort(Y,SY),'chr merge_attributes'(X,SY,M))),Gs),
list2conj(Gs,SortGoals),
bagof(MS,A ^ B ^ C ^ member((A,'chr merge_attributes'(B,C,MS)),Gs), SuspsList),
make_attr(N,Mask,SuspsList,Attr),
Goal = (
TAttr2 = Attr2,
SortGoals,
Mask is Mask1 \/ Mask2
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Storetype dependent lookup
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% lookup_passive_head(+Head,+PreviousVars,+RenamingVarDict,
%% -Goal,-SuspensionList) is det.
%
% Create a universal lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
lookup_passive_head(Head,PreJoin,VarDict,Goal,AllSusps) :-
functor(Head,F,A),
get_store_type(F/A,StoreType),
lookup_passive_head(StoreType,Head,PreJoin,VarDict,[],Goal,AllSusps).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% lookup_passive_head(+Head,+PreviousVars,+RenamingVarDict,+GroundVars,
%% -Goal,-SuspensionList) is det.
%
% Create a universal lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
lookup_passive_head(Head,PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
functor(Head,F,A),
get_store_type(F/A,StoreType),
lookup_passive_head(StoreType,Head,PreJoin,VarDict,GroundVars,Goal,AllSusps).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% lookup_passive_head(+StoreType,+Head,+PreviousVars,+RenamingVarDict,
%% +GroundVars,-Goal,-SuspensionList) is det.
%
% Create a universal lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
lookup_passive_head(default,Head,PreJoin,VarDict,_,Goal,AllSusps) :-
functor(Head,F,A),
passive_head_via(Head,PreJoin,VarDict,Goal,AllSusps),
update_store_type(F/A,default).
lookup_passive_head(multi_inthash(Indexes),Head,_PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
hash_lookup_passive_head(inthash,Indexes,Head,VarDict,GroundVars,Goal,AllSusps,_).
lookup_passive_head(multi_hash(Indexes),Head,_PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
hash_lookup_passive_head(hash,Indexes,Head,VarDict,GroundVars,Goal,AllSusps,_).
lookup_passive_head(global_ground,Head,_PreJoin,_VarDict,_,Goal,AllSusps) :-
functor(Head,F,A),
global_ground_store_name(F/A,StoreName),
make_get_store_goal(StoreName,AllSusps,Goal), % Goal = nb_getval(StoreName,AllSusps),
update_store_type(F/A,global_ground).
lookup_passive_head(var_assoc_store(VarIndex,KeyIndex),Head,_PreJoin,VarDict,_,Goal,AllSusps) :-
arg(VarIndex,Head,OVar),
arg(KeyIndex,Head,OKey),
translate([OVar,OKey],VarDict,[Var,Key]),
get_target_module(Module),
Goal = (
get_attr(Var,Module,AssocStore),
lookup_assoc_store(AssocStore,Key,AllSusps)
).
lookup_passive_head(global_singleton,Head,_PreJoin,_VarDict,_,Goal,AllSusps) :-
functor(Head,F,A),
global_singleton_store_name(F/A,StoreName),
make_get_store_goal(StoreName,Susp,GetStoreGoal),
Goal = (GetStoreGoal,Susp \== [],AllSusps = [Susp]),
update_store_type(F/A,global_singleton).
lookup_passive_head(multi_store(StoreTypes),Head,PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
once((
member(ST,StoreTypes),
lookup_passive_head(ST,Head,PreJoin,VarDict,GroundVars,Goal,AllSusps)
)).
lookup_passive_head(identifier_store(Index),Head,PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
functor(Head,F,A),
arg(Index,Head,Var),
translate([Var],VarDict,[KeyVar]),
delay_phase_end(validate_store_type_assumptions,
identifier_lookup(F/A,Index,AllSusps,KeyVar,Goal)
),
update_store_type(F/A,identifier_store(Index)),
get_identifier_index(F/A,Index,_).
lookup_passive_head(type_indexed_identifier_store(Index,IndexType),Head,PreJoin,VarDict,GroundVars,Goal,AllSusps) :-
functor(Head,F,A),
arg(Index,Head,Var),
( var(Var) ->
translate([Var],VarDict,[KeyVar]),
Goal = StructGoal
; ground(Var), Var = '$chr_identifier_match'(ActualVar,_) ->
lookup_only_identifier_atom(IndexType,ActualVar,KeyVar,LookupGoal),
Goal = (LookupGoal,StructGoal)
),
delay_phase_end(validate_store_type_assumptions,
type_indexed_identifier_lookup(F/A,Index,IndexType,AllSusps,KeyVar,StructGoal)
),
update_store_type(F/A,type_indexed_identifier_store(Index,IndexType)),
get_type_indexed_identifier_index(IndexType,F/A,Index,_).
identifier_lookup(C,Index,AllSusps,KeyVar,Goal) :-
get_identifier_size(ISize),
functor(Struct,struct,ISize),
get_identifier_index(C,Index,IIndex),
arg(IIndex,Struct,AllSusps),
Goal = (KeyVar = Struct).
type_indexed_identifier_lookup(C,Index,IndexType,AllSusps,KeyVar,Goal) :-
type_indexed_identifier_structure(IndexType,Struct),
get_type_indexed_identifier_index(IndexType,C,Index,IIndex),
arg(IIndex,Struct,AllSusps),
Goal = (KeyVar = Struct).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% hash_lookup_passive_head(+StoreType,+Indexes,+Head,+RenamingVarDict,
%% +GroundVars,-Goal,-SuspensionList,-Index) is det.
%
% Create a universal hash lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
hash_lookup_passive_head(HashType,Indexes,Head,VarDict,GroundVars,Goal,AllSusps,Index) :-
pick_hash_index(Indexes,Head,VarDict,Index,KeyArgs,KeyArgCopies),
( KeyArgCopies = [KeyCopy] ->
true
;
KeyCopy =.. [k|KeyArgCopies]
),
functor(Head,F,A),
multi_hash_lookup_goal(F/A,HashType,Index,KeyCopy,AllSusps,LookupGoal),
check_ground(GroundVars,KeyArgs,OriginalGroundCheck),
my_term_copy(OriginalGroundCheck,VarDict,GroundCheck),
Goal = (GroundCheck,LookupGoal),
( HashType == inthash ->
update_store_type(F/A,multi_inthash([Index]))
;
update_store_type(F/A,multi_hash([Index]))
).
pick_hash_index(Indexes,Head,VarDict,Index,KeyArgs,KeyArgCopies) :-
member(Index,Indexes),
args(Index,Head,KeyArgs),
key_in_scope(KeyArgs,VarDict,KeyArgCopies),
!.
% check whether we can copy the given terms
% with the given dictionary, and, if so, do so
key_in_scope([],VarDict,[]).
key_in_scope([Arg|Args],VarDict,[ArgCopy|ArgCopies]) :-
term_variables(Arg,Vars),
translate(Vars,VarDict,VarCopies),
copy_term(Arg/Vars,ArgCopy/VarCopies),
key_in_scope(Args,VarDict,ArgCopies).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% existential_lookup(+StoreType,+Head,+PrevVariablesHead,+RenamingVarDict,
%% +GroundVariables,-SuspensionTerm,-Goal,-SuspVar,
%% +VarArgDict,-NewVarArgDict) is det.
%
% Create existential lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
existential_lookup(var_assoc_store(VarIndex,KeyIndex),Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,Pairs) :- !,
lookup_passive_head(var_assoc_store(VarIndex,KeyIndex),Head,PreJoin,VarDict,GroundVars,UniversalGoal,AllSusps),
sbag_member_call(Susp,AllSusps,Sbag),
functor(Head,F,A),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,SuspTerm),
get_static_suspension_field(F/A,SuspTerm,state,active,GetState)
)
),
Goal = (
UniversalGoal,
Sbag,
Susp = SuspTerm,
GetState
).
existential_lookup(global_singleton,Head,_PreJoin,_VarDict,_,SuspTerm,Goal,Susp,Pairs,Pairs) :- !,
functor(Head,F,A),
global_singleton_store_name(F/A,StoreName),
make_get_store_goal(StoreName,Susp,GetStoreGoal),
Goal = (
GetStoreGoal, % nb_getval(StoreName,Susp),
Susp \== [],
Susp = SuspTerm
),
update_store_type(F/A,global_singleton).
existential_lookup(multi_store(StoreTypes),Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :- !,
once((
member(ST,StoreTypes),
existential_lookup(ST,Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs)
)).
existential_lookup(multi_inthash(Indexes),Head,_,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :- !,
existential_hash_lookup(inthash,Indexes,Head,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs).
existential_lookup(multi_hash(Indexes),Head,_,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :- !,
existential_hash_lookup(hash,Indexes,Head,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs).
existential_lookup(identifier_store(Index),Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :- !,
lookup_passive_head(identifier_store(Index),Head,PreJoin,VarDict,GroundVars,LookupGoal,AllSusps),
hash_index_filter(Pairs,[Index],NPairs),
functor(Head,F,A),
( check_fd_lookup_condition(F,A,Head,KeyArgs) ->
Sbag = (AllSusps = [Susp])
;
sbag_member_call(Susp,AllSusps,Sbag)
),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,SuspTerm),
get_static_suspension_field(F/A,SuspTerm,state,active,GetState)
)
),
Goal = (
LookupGoal,
Sbag,
Susp = SuspTerm, % not inlined
GetState
).
existential_lookup(type_indexed_identifier_store(Index,IndexType),Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :- !,
lookup_passive_head(type_indexed_identifier_store(Index,IndexType),Head,PreJoin,VarDict,GroundVars,LookupGoal,AllSusps),
hash_index_filter(Pairs,[Index],NPairs),
functor(Head,F,A),
( check_fd_lookup_condition(F,A,Head,KeyArgs) ->
Sbag = (AllSusps = [Susp])
;
sbag_member_call(Susp,AllSusps,Sbag)
),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,SuspTerm),
get_static_suspension_field(F/A,SuspTerm,state,active,GetState)
)
),
Goal = (
LookupGoal,
Sbag,
Susp = SuspTerm, % not inlined
GetState
).
existential_lookup(StoreType,Head,PreJoin,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,Pairs) :-
lookup_passive_head(StoreType,Head,PreJoin,VarDict,GroundVars,UGoal,Susps),
sbag_member_call(Susp,Susps,Sbag),
functor(Head,F,A),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,SuspTerm),
get_static_suspension_field(F/A,SuspTerm,state,active,GetState)
)
),
Goal = (
UGoal,
Sbag,
Susp = SuspTerm, % not inlined
GetState
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% existential_hash_lookup(+StoreType,+Indexes,+Head,+RenamingVarDict,
%% +GroundVariables,-SuspensionTerm,-Goal,-SuspVar,
%% +VarArgDict,-NewVarArgDict) is det.
%
% Create existential hash lookup goal for given head.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
existential_hash_lookup(HashType,Indexes,Head,VarDict,GroundVars,SuspTerm,Goal,Susp,Pairs,NPairs) :-
hash_lookup_passive_head(HashType,Indexes,Head,VarDict,GroundVars,LookupGoal,AllSusps,Index),
hash_index_filter(Pairs,Index,NPairs),
functor(Head,F,A),
( check_fd_lookup_condition(F,A,Head,KeyArgs) ->
Sbag = (AllSusps = [Susp])
;
sbag_member_call(Susp,AllSusps,Sbag)
),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(F/A,SuspTerm),
get_static_suspension_field(F/A,SuspTerm,state,active,GetState)
)
),
Goal = (
LookupGoal,
Sbag,
Susp = SuspTerm, % not inlined
GetState
).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
%% hash_index_filter(+Pairs,+Index,-NPairs) is det.
%
% Filter out pairs already covered by given hash index.
% makes them 'silent'
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%
hash_index_filter(Pairs,Index,NPairs) :-
hash_index_filter(Pairs,Index,1,NPairs).
hash_index_filter([],_,_,[]).
hash_index_filter([P|Ps],Index,N,NPairs) :-
( Index = [I|Is] ->
NN is N + 1,
( I > N ->
NPairs = [P|NPs],
hash_index_filter(Ps,[I|Is],NN,NPs)
; I == N ->
NPairs = [silent(P)|NPs],
hash_index_filter(Ps,Is,NN,NPs)
)
;
NPairs = [P|Ps]
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%------------------------------------------------------------------------------%
%% assume_constraint_stores(+ConstraintSymbols) is det.
%
% Compute all constraint store types that are possible for the given
% =ConstraintSymbols=.
%------------------------------------------------------------------------------%
assume_constraint_stores([]).
assume_constraint_stores([C|Cs]) :-
( chr_pp_flag(debugable,off),
( only_ground_indexed_arguments(C) ; chr_pp_flag(mixed_stores,on) ),
is_stored(C),
get_store_type(C,default) ->
get_indexed_arguments(C,AllIndexedArgs),
get_constraint_mode(C,Modes),
aggregate_all(bag(Index)-count,
(member(Index,AllIndexedArgs),nth1(Index,Modes,+)),
IndexedArgs-NbIndexedArgs),
% Construct Index Combinations
( NbIndexedArgs > 10 ->
findall([Index],member(Index,IndexedArgs),Indexes)
;
findall(Index,(sublist(Index,IndexedArgs), Index \== []),UnsortedIndexes),
predsort(longer_list,UnsortedIndexes,Indexes)
),
% EXPERIMENTAL HEURISTIC
% findall(Index, (
% member(Arg1,IndexedArgs),
% member(Arg2,IndexedArgs),
% Arg1 =< Arg2,
% sort([Arg1,Arg2], Index)
% ), UnsortedIndexes),
% predsort(longer_list,UnsortedIndexes,Indexes),
% Choose Index Type
( get_functional_dependency(C,1,Pattern,Key),
all_distinct_var_args(Pattern), Key == [] ->
assumed_store_type(C,global_singleton)
; ( only_ground_indexed_arguments(C) ; NbIndexedArgs > 0 ) ->
get_constraint_type_det(C,ArgTypes),
partition_indexes(Indexes,ArgTypes,HashIndexes,IntHashIndexes,IdentifierIndexes,CompoundIdentifierIndexes),
( IntHashIndexes = [] ->
Stores = Stores1
;
Stores = [multi_inthash(IntHashIndexes)|Stores1]
),
( HashIndexes = [] ->
Stores1 = Stores2
;
Stores1 = [multi_hash(HashIndexes)|Stores2]
),
( IdentifierIndexes = [] ->
Stores2 = Stores3
;
maplist(wrap_in_functor(identifier_store),IdentifierIndexes,WrappedIdentifierIndexes),
append(WrappedIdentifierIndexes,Stores3,Stores2)
),
append(CompoundIdentifierIndexes,Stores4,Stores3),
( only_ground_indexed_arguments(C)
-> Stores4 = [global_ground]
; Stores4 = [default]
),
assumed_store_type(C,multi_store(Stores))
; true
)
;
true
),
assume_constraint_stores(Cs).
%------------------------------------------------------------------------------%
%% partition_indexes(+Indexes,+Types,
%% -HashIndexes,-IntHashIndexes,-IdentifierIndexes) is det.
%------------------------------------------------------------------------------%
partition_indexes([],_,[],[],[],[]).
partition_indexes([Index|Indexes],Types,HashIndexes,IntHashIndexes,IdentifierIndexes,CompoundIdentifierIndexes) :-
( Index = [I],
nth1(I,Types,Type),
unalias_type(Type,UnAliasedType),
UnAliasedType == chr_identifier ->
IdentifierIndexes = [I|RIdentifierIndexes],
IntHashIndexes = RIntHashIndexes,
HashIndexes = RHashIndexes,
CompoundIdentifierIndexes = RCompoundIdentifierIndexes
; Index = [I],
nth1(I,Types,Type),
unalias_type(Type,UnAliasedType),
nonvar(UnAliasedType),
UnAliasedType = chr_identifier(IndexType) ->
CompoundIdentifierIndexes = [type_indexed_identifier_store(I,IndexType)|RCompoundIdentifierIndexes],
IdentifierIndexes = RIdentifierIndexes,
IntHashIndexes = RIntHashIndexes,
HashIndexes = RHashIndexes
; Index = [I],
nth1(I,Types,Type),
unalias_type(Type,UnAliasedType),
UnAliasedType == dense_int ->
IntHashIndexes = [Index|RIntHashIndexes],
HashIndexes = RHashIndexes,
IdentifierIndexes = RIdentifierIndexes,
CompoundIdentifierIndexes = RCompoundIdentifierIndexes
; member(I,Index),
nth1(I,Types,Type),
unalias_type(Type,UnAliasedType),
nonvar(UnAliasedType),
UnAliasedType = chr_identifier(_) ->
% don't use chr_identifiers in hash indexes
IntHashIndexes = RIntHashIndexes,
HashIndexes = RHashIndexes,
IdentifierIndexes = RIdentifierIndexes,
CompoundIdentifierIndexes = RCompoundIdentifierIndexes
;
IntHashIndexes = RIntHashIndexes,
HashIndexes = [Index|RHashIndexes],
IdentifierIndexes = RIdentifierIndexes,
CompoundIdentifierIndexes = RCompoundIdentifierIndexes
),
partition_indexes(Indexes,Types,RHashIndexes,RIntHashIndexes,RIdentifierIndexes,RCompoundIdentifierIndexes).
longer_list(R,L1,L2) :-
length(L1,N1),
length(L2,N2),
compare(Rt,N2,N1),
( Rt == (=) ->
compare(R,L1,L2)
;
R = Rt
).
all_distinct_var_args(Term) :-
copy_term_nat(Term,TermCopy),
functor(Term,F,A),
functor(Pattern,F,A),
Pattern =@= TermCopy.
get_indexed_arguments(C,IndexedArgs) :-
C = F/A,
get_indexed_arguments(1,A,C,IndexedArgs).
get_indexed_arguments(I,N,C,L) :-
( I > N ->
L = []
; ( is_indexed_argument(C,I) ->
L = [I|T]
;
L = T
),
J is I + 1,
get_indexed_arguments(J,N,C,T)
).
validate_store_type_assumptions([]).
validate_store_type_assumptions([C|Cs]) :-
validate_store_type_assumption(C),
validate_store_type_assumptions(Cs).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% new code generation
universal_search_iterator_end([CurrentHead|PrevHeads],NextHeads,Rule,F/A,O,Id,L,T) :-
Rule = rule(H1,_,Guard,Body),
gen_var_susp_list_for_b(PrevHeads,[CurrentHead,NextHeads,Guard,Body],_,VarsAndSuspsList,FirstVarsSusp,_,PrevIterators),
universal_search_iterator_failure_vars(PrevHeads,Id,VarsAndSuspsList,FirstVarsSusp,PrevIterators,PrevVarsAndSusps,PrevId0),
flatten(VarsAndSuspsList,VarsAndSusps),
Vars = [ [] | VarsAndSusps],
build_head(F,A,[O|Id],Vars,Head),
( PrevId0 = [_] ->
get_success_continuation_code_id(F/A,O,PredictedPrevId),
% format('~w == ~w ?\n',[PrevId0,PredictedPrevId]),
PrevId = [PredictedPrevId] % PrevId = PrevId0
;
PrevId = [O|PrevId0]
),
build_head(F,A,PrevId,PrevVarsAndSusps,PredecessorCall),
Clause = ( Head :- PredecessorCall),
add_dummy_location(Clause,LocatedClause),
L = [LocatedClause | T].
% ( H1 == [],
% functor(CurrentHead,CF,CA),
% check_fd_lookup_condition(CF,CA,CurrentHead,PrevHeads) ->
% L = T
% ;
% gen_var_susp_list_for_b(PrevHeads,[CurrentHead,NextHeads,Guard,Body],_,VarsAndSuspsList,FirstVarsSusp,_,PrevIterators),
% universal_search_iterator_failure_vars(PrevHeads,Id,VarsAndSuspsList,FirstVarsSusp,PrevIterators,PrevVarsAndSusps,PrevId),
% flatten(VarsAndSuspsList,VarsAndSusps),
% Vars = [ [] | VarsAndSusps],
% build_head(F,A,Id,Vars,Head),
% build_head(F,A,PrevId,PrevVarsAndSusps,PredecessorCall),
% Clause = ( Head :- PredecessorCall),
% L = [Clause | T]
% ).
% skips back intelligently over global_singleton lookups
universal_search_iterator_failure_vars(PrevHeads,Id,VarsAndSuspsList,BaseCallArgs,PrevIterators,PrevVarsAndSusps,PrevId) :-
( Id = [0|_] ->
% TOM: add partial success continuation optimization here!
next_id(Id,PrevId),
PrevVarsAndSusps = BaseCallArgs
;
VarsAndSuspsList = [_|AllButFirstList],
dec_id(Id,PrevId1),
( PrevHeads = [PrevHead|PrevHeads1],
functor(PrevHead,F,A),
check_fd_lookup_condition(F,A,PrevHead,PrevHeads1) ->
PrevIterators = [_|PrevIterators1],
universal_search_iterator_failure_vars(PrevHeads1,PrevId1,AllButFirstList,BaseCallArgs,PrevIterators1,PrevVarsAndSusps,PrevId)
;
PrevId = PrevId1,
flatten(AllButFirstList,AllButFirst),
PrevIterators = [PrevIterator|_],
PrevVarsAndSusps = [PrevIterator|AllButFirst]
)
).
universal_search_iterator([NextHead|RestHeads],[CurrentHead|PreHeads],Rule,F/A,O,Id,L,T) :-
Rule = rule(_,_,Guard,Body),
gen_var_susp_list_for_b(PreHeads,[CurrentHead,NextHead,RestHeads,Guard,Body],VarDict,PreVarsAndSuspsList,FirstVarsSusp,AllSusps,PrevIterators),
init(AllSusps,PreSusps),
flatten(PreVarsAndSuspsList,PreVarsAndSusps),
gen_var(OtherSusps),
functor(CurrentHead,OtherF,OtherA),
gen_vars(OtherA,OtherVars),
head_info(CurrentHead,OtherA,OtherVars,OtherSusp,_VarsSusp,HeadPairs),
get_constraint_mode(OtherF/OtherA,Mode),
head_arg_matches(HeadPairs,Mode,VarDict,FirstMatching,VarDict1),
delay_phase_end(validate_store_type_assumptions,
( static_suspension_term(OtherF/OtherA,OtherSuspension),
get_static_suspension_field(OtherF/OtherA,OtherSuspension,state,active,GetState),
get_static_suspension_term_field(arguments,OtherF/OtherA,OtherSuspension,OtherVars)
)
),
different_from_other_susps(CurrentHead,OtherSusp,PreHeads,PreSusps,DiffSuspGoals),
% create_get_mutable_ref(active,State,GetMutable),
CurrentSuspTest = (
OtherSusp = OtherSuspension,
GetState,
DiffSuspGoals,
FirstMatching
),
add_heads_ground_variables([CurrentHead|PreHeads],[],GroundVars),
lookup_passive_head(NextHead,[CurrentHead|PreHeads],VarDict1,GroundVars,NextSuspGoal,NextSusps),
inc_id(Id,NestedId),
ClauseVars = [[OtherSusp|OtherSusps]|PreVarsAndSusps],
build_head(F,A,[O|Id],ClauseVars,ClauseHead),
passive_delegate_variables(CurrentHead,PreHeads,[NextHead,RestHeads,Guard,Body],VarDict1,CurrentHeadVars),
append([NextSusps|CurrentHeadVars],[OtherSusp,OtherSusps|PreVarsAndSusps],NestedVars),
build_head(F,A,[O|NestedId],NestedVars,NestedHead),
( check_fd_lookup_condition(OtherF,OtherA,CurrentHead,PreHeads) -> % iterator (OtherSusps) is empty at runtime
universal_search_iterator_failure_vars(PreHeads,Id,PreVarsAndSuspsList,FirstVarsSusp,PrevIterators,PreVarsAndSusps1,PrevId0),
RecursiveVars = PreVarsAndSusps1
;
RecursiveVars = [OtherSusps|PreVarsAndSusps],
PrevId0 = Id
),
( PrevId0 = [_] ->
PrevId = PrevId0
;
PrevId = [O|PrevId0]
),
build_head(F,A,PrevId,RecursiveVars,RecursiveHead),
Clause = (
ClauseHead :-
( CurrentSuspTest,
NextSuspGoal
->
NestedHead
; RecursiveHead
)
),
add_dummy_location(Clause,LocatedClause),
L = [LocatedClause|T].
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Observation Analysis
%
% CLASSIFICATION
% Enabled
%
% Analysis based on Abstract Interpretation paper.
%
% TODO:
% stronger analysis domain [research]
:- chr_constraint
initial_call_pattern/1,
call_pattern/1,
call_pattern_worker/1,
final_answer_pattern/2,
abstract_constraints/1,
depends_on/2,
depends_on_ap/4,
depends_on_goal/2,
ai_observed_internal/2,
% ai_observed/2,
ai_not_observed_internal/2,
ai_not_observed/2,
ai_is_observed/2,
depends_on_as/3,
ai_observation_gather_results/0.
:- chr_type abstract_domain ---> odom(program_point,list(constraint)).
:- chr_type program_point == any.
:- chr_option(mode,initial_call_pattern(+)).
:- chr_option(type_declaration,call_pattern(abstract_domain)).
:- chr_option(mode,call_pattern(+)).
:- chr_option(type_declaration,call_pattern(abstract_domain)).
:- chr_option(mode,call_pattern_worker(+)).
:- chr_option(type_declaration,call_pattern_worker(abstract_domain)).
:- chr_option(mode,final_answer_pattern(+,+)).
:- chr_option(type_declaration,final_answer_pattern(abstract_domain,abstract_domain)).
:- chr_option(mode,abstract_constraints(+)).
:- chr_option(type_declaration,abstract_constraints(list)).
:- chr_option(mode,depends_on(+,+)).
:- chr_option(type_declaration,depends_on(abstract_domain,abstract_domain)).
:- chr_option(mode,depends_on_as(+,+,+)).
:- chr_option(mode,depends_on_ap(+,+,+,+)).
:- chr_option(mode,depends_on_goal(+,+)).
:- chr_option(mode,ai_is_observed(+,+)).
:- chr_option(mode,ai_not_observed(+,+)).
% :- chr_option(mode,ai_observed(+,+)).
:- chr_option(mode,ai_not_observed_internal(+,+)).
:- chr_option(mode,ai_observed_internal(+,+)).
abstract_constraints_fd @
abstract_constraints(_) \ abstract_constraints(_) <=> true.
ai_observed_internal(C,O) \ ai_not_observed_internal(C,O) <=> true.
ai_not_observed_internal(C,O) \ ai_not_observed_internal(C,O) <=> true.
ai_observed_internal(C,O) \ ai_observed_internal(C,O) <=> true.
ai_not_observed(C,O) \ ai_is_observed(C,O) <=> fail.
ai_is_observed(_,_) <=> true.
ai_observation_gather_results \ ai_observed_internal(C,O) <=> true. % ai_observed(C,O).
ai_observation_gather_results \ ai_not_observed_internal(C,O) <=> ai_not_observed(C,O).
ai_observation_gather_results <=> true.
%------------------------------------------------------------------------------%
% Main Analysis Entry
%------------------------------------------------------------------------------%
ai_observation_analysis(ACs) :-
( chr_pp_flag(ai_observation_analysis,on),
get_target_module(Module), '$chr_compiled_with_version'(3) -> % , Module \== guard_entailment ->
list_to_ord_set(ACs,ACSet),
abstract_constraints(ACSet),
ai_observation_schedule_initial_calls(ACSet,ACSet),
ai_observation_gather_results
;
true
).
ai_observation_schedule_initial_calls([],_).
ai_observation_schedule_initial_calls([AC|RACs],ACs) :-
ai_observation_schedule_initial_call(AC,ACs),
ai_observation_schedule_initial_calls(RACs,ACs).
ai_observation_schedule_initial_call(AC,ACs) :-
ai_observation_top(AC,CallPattern),
% ai_observation_bot(AC,ACs,CallPattern),
initial_call_pattern(CallPattern).
ai_observation_schedule_new_calls([],AP).
ai_observation_schedule_new_calls([AC|ACs],AP) :-
AP = odom(_,Set),
initial_call_pattern(odom(AC,Set)),
ai_observation_schedule_new_calls(ACs,AP).
final_answer_pattern(CP,AP1) \ final_answer_pattern(CP,AP2)
<=>
ai_observation_leq(AP2,AP1)
|
true.
initial_call_pattern(CP) \ initial_call_pattern(CP) <=> true.
initial_call_pattern(CP) ==> call_pattern(CP).
initial_call_pattern(CP), final_answer_pattern(CP,AP), abstract_constraints(ACs) # ID3
==>
ai_observation_schedule_new_calls(ACs,AP)
pragma
passive(ID3).
call_pattern(CP) \ call_pattern(CP) <=> true.
depends_on(CP1,CP2), final_answer_pattern(CP2,AP) ==>
final_answer_pattern(CP1,AP).
%call_pattern(CP) ==> writeln(call_pattern(CP)).
call_pattern(CP) ==> call_pattern_worker(CP).
%------------------------------------------------------------------------------%
% Abstract Goal
%------------------------------------------------------------------------------%
% AbstractGoala
%call_pattern(odom([],Set)) ==>
% final_answer_pattern(odom([],Set),odom([],Set)).
call_pattern_worker(odom([],Set)) <=>
% writeln(' - AbstractGoal'(odom([],Set))),
final_answer_pattern(odom([],Set),odom([],Set)).
% AbstractGoalb
call_pattern_worker(odom([G|Gs],Set)) <=>
% writeln(' - AbstractGoal'(odom([G|Gs],Set))),
CP1 = odom(G,Set),
depends_on_goal(odom([G|Gs],Set),CP1),
call_pattern(CP1).
depends_on_goal(CP1,CP2), final_answer_pattern(CP2,AP2) \ depends_on(CP1,_) # ID
<=> true pragma passive(ID).
depends_on_goal(CP1,CP2), final_answer_pattern(CP2,AP2)
==>
CP1 = odom([_|Gs],_),
AP2 = odom([],Set),
CCP = odom(Gs,Set),
call_pattern(CCP),
depends_on(CP1,CCP).
%------------------------------------------------------------------------------%
% Abstract Disjunction
%------------------------------------------------------------------------------%
call_pattern_worker(odom((AG1;AG2),Set)) <=>
CP = odom((AG1;AG2),Set),
InitialAnswerApproximation = odom([],Set),
final_answer_pattern(CP,InitialAnswerApproximation),
CP1 = odom(AG1,Set),
CP2 = odom(AG2,Set),
call_pattern(CP1),
call_pattern(CP2),
depends_on_as(CP,CP1,CP2).
%------------------------------------------------------------------------------%
% Abstract Solve
%------------------------------------------------------------------------------%
call_pattern_worker(odom(builtin,Set)) <=>
% writeln(' - AbstractSolve'(odom(builtin,Set))),
ord_empty(EmptySet),
final_answer_pattern(odom(builtin,Set),odom([],EmptySet)).
%------------------------------------------------------------------------------%
% Abstract Drop
%------------------------------------------------------------------------------%
max_occurrence(C,MO) # ID2 \ call_pattern_worker(odom(occ(C,O),Set))
<=>
O > MO
|
% writeln(' - AbstractDrop'(odom(occ(C,O),Set))),
final_answer_pattern(odom(occ(C,O),Set),odom([],Set))
pragma
passive(ID2).
%------------------------------------------------------------------------------%
% Abstract Activate
%------------------------------------------------------------------------------%
call_pattern_worker(odom(AC,Set))
<=>
AC = _ / _
|
% writeln(' - AbstractActivate'(odom(AC,Set))),
CP = odom(occ(AC,1),Set),
call_pattern(CP),
depends_on(odom(AC,Set),CP).
%------------------------------------------------------------------------------%
% Abstract Passive
%------------------------------------------------------------------------------%
occurrence(C,O,RuleNb,ID,_) # ID2 \ call_pattern_worker(odom(occ(C,O),Set))
<=>
is_passive(RuleNb,ID)
|
% writeln(' - AbstractPassive'(odom(occ(C,O),Set))),
% DEFAULT
NO is O + 1,
DCP = odom(occ(C,NO),Set),
call_pattern(DCP),
final_answer_pattern(odom(occ(C,O),Set),odom([],Set)),
depends_on(odom(occ(C,O),Set),DCP)
pragma
passive(ID2).
%------------------------------------------------------------------------------%
% Abstract Simplify
%------------------------------------------------------------------------------%
% AbstractSimplify
occurrence(C,O,RuleNb,ID,simplification) # ID2 \ call_pattern_worker(odom(occ(C,O),Set))
<=>
\+ is_passive(RuleNb,ID)
|
% writeln(' - AbstractPassive'(odom(occ(C,O),Set))),
ai_observation_memo_simplification_rest_heads(C,O,AbstractRestHeads),
ai_observation_observe_set(Set,AbstractRestHeads,Set2),
ai_observation_memo_abstract_goal(RuleNb,AG),
call_pattern(odom(AG,Set2)),
% DEFAULT
NO is O + 1,
DCP = odom(occ(C,NO),Set),
call_pattern(DCP),
depends_on_as(odom(occ(C,O),Set),odom(AG,Set2),DCP),
% DEADLOCK AVOIDANCE
final_answer_pattern(odom(occ(C,O),Set),odom([],Set))
pragma
passive(ID2).
depends_on_as(CP,CPS,CPD),
final_answer_pattern(CPS,APS),
final_answer_pattern(CPD,APD) ==>
ai_observation_lub(APS,APD,AP),
final_answer_pattern(CP,AP).
:- chr_constraint
ai_observation_memo_simplification_rest_heads/3,
ai_observation_memoed_simplification_rest_heads/3.
:- chr_option(mode,ai_observation_memo_simplification_rest_heads(+,+,?)).
:- chr_option(mode,ai_observation_memoed_simplification_rest_heads(+,+,+)).
ai_observation_memoed_simplification_rest_heads(C,O,RH) \ ai_observation_memo_simplification_rest_heads(C,O,QRH)
<=>
QRH = RH.
abstract_constraints(ACs) # ID1, occurrence(C,O,RuleNb,ID,_) # ID2, rule(RuleNb,Rule) # ID3 \ ai_observation_memo_simplification_rest_heads(C,O,QRH)
<=>
Rule = pragma(rule(H1,H2,_,_),ids(IDs1,_),_,_,_),
once(select2(ID,_,IDs1,H1,_,RestH1)),
ai_observation_abstract_constraints(RestH1,ACs,ARestHeads),
ai_observation_abstract_constraints(H2,ACs,AH2),
append(ARestHeads,AH2,AbstractHeads),
sort(AbstractHeads,QRH),
ai_observation_memoed_simplification_rest_heads(C,O,QRH)
pragma
passive(ID1),
passive(ID2),
passive(ID3).
ai_observation_memo_simplification_rest_heads(_,_,_) <=> fail.
%------------------------------------------------------------------------------%
% Abstract Propagate
%------------------------------------------------------------------------------%
% AbstractPropagate
occurrence(C,O,RuleNb,ID,propagation) # ID2 \ call_pattern_worker(odom(occ(C,O),Set))
<=>
\+ is_passive(RuleNb,ID)
|
% writeln(' - AbstractPropagate'(odom(occ(C,O),Set))),
% observe partners
ai_observation_memo_propagation_rest_heads(C,O,AHs),
ai_observation_observe_set(Set,AHs,Set2),
ord_add_element(Set2,C,Set3),
ai_observation_memo_abstract_goal(RuleNb,AG),
call_pattern(odom(AG,Set3)),
( ord_memberchk(C,Set2) ->
Delete = no
;
Delete = yes
),
% DEFAULT
NO is O + 1,
DCP = odom(occ(C,NO),Set),
call_pattern(DCP),
depends_on_ap(odom(occ(C,O),Set),odom(AG,Set3),DCP,Delete)
pragma
passive(ID2).
:- chr_constraint
ai_observation_memo_propagation_rest_heads/3,
ai_observation_memoed_propagation_rest_heads/3.
:- chr_option(mode,ai_observation_memo_propagation_rest_heads(+,+,?)).
:- chr_option(mode,ai_observation_memoed_propagation_rest_heads(+,+,+)).
ai_observation_memoed_propagation_rest_heads(C,O,RH) \ ai_observation_memo_propagation_rest_heads(C,O,QRH)
<=>
QRH = RH.
abstract_constraints(ACs) # ID1, occurrence(C,O,RuleNb,ID,_) # ID2, rule(RuleNb,Rule) # ID3 \ ai_observation_memo_propagation_rest_heads(C,O,QRH)
<=>
Rule = pragma(rule(H1,H2,_,_),ids(_,IDs2),_,_,_),
once(select2(ID,_,IDs2,H2,_,RestH2)),
ai_observation_abstract_constraints(RestH2,ACs,ARestHeads),
ai_observation_abstract_constraints(H1,ACs,AH1),
append(ARestHeads,AH1,AbstractHeads),
sort(AbstractHeads,QRH),
ai_observation_memoed_propagation_rest_heads(C,O,QRH)
pragma
passive(ID1),
passive(ID2),
passive(ID3).
ai_observation_memo_propagation_rest_heads(_,_,_) <=> fail.
depends_on_ap(CP,CPP,CPD,Delete), final_answer_pattern(CPD,APD) ==>
final_answer_pattern(CP,APD).
depends_on_ap(CP,CPP,CPD,Delete), final_answer_pattern(CPP,APP),
final_answer_pattern(CPD,APD) ==>
true |
CP = odom(occ(C,O),_),
( ai_observation_is_observed(APP,C) ->
ai_observed_internal(C,O)
;
ai_not_observed_internal(C,O)
),
( Delete == yes ->
APP = odom([],Set0),
ord_del_element(Set0,C,Set),
NAPP = odom([],Set)
;
NAPP = APP
),
ai_observation_lub(NAPP,APD,AP),
final_answer_pattern(CP,AP).
%------------------------------------------------------------------------------%
% Catch All
%------------------------------------------------------------------------------%
call_pattern_worker(CP) <=> chr_error(internal,'AI observation analysis: unexpected abstract state ~w\n',[CP]).
%------------------------------------------------------------------------------%
% Auxiliary Predicates
%------------------------------------------------------------------------------%
ai_observation_lub(odom(AG,S1),odom(AG,S2),odom(AG,S3)) :-
ord_intersection(S1,S2,S3).
ai_observation_bot(AG,AS,odom(AG,AS)).
ai_observation_top(AG,odom(AG,EmptyS)) :-
ord_empty(EmptyS).
ai_observation_leq(odom(AG,S1),odom(AG,S2)) :-
ord_subset(S2,S1).
ai_observation_observe_set(S,ACSet,NS) :-
ord_subtract(S,ACSet,NS).
ai_observation_abstract_constraint(C,ACs,AC) :-
functor(C,F,A),
AC = F/A,
memberchk(AC,ACs).
ai_observation_abstract_constraints(Cs,ACs,NACs) :-
findall(NAC,(member(C,Cs),ai_observation_abstract_constraint(C,ACs,NAC)),NACs).
%------------------------------------------------------------------------------%
% Abstraction of Rule Bodies
%------------------------------------------------------------------------------%
:- chr_constraint
ai_observation_memoed_abstract_goal/2,
ai_observation_memo_abstract_goal/2.
:- chr_option(mode,ai_observation_memoed_abstract_goal(+,+)).
:- chr_option(mode,ai_observation_memo_abstract_goal(+,?)).
ai_observation_memoed_abstract_goal(RuleNb,AG) # ID1 \ ai_observation_memo_abstract_goal(RuleNb,QAG)
<=>
QAG = AG
pragma
passive(ID1).
rule(RuleNb,Rule) # ID1, abstract_constraints(ACs) # ID2 \ ai_observation_memo_abstract_goal(RuleNb,QAG)
<=>
Rule = pragma(rule(H1,H2,Guard,Body),_,_,_,_),
ai_observation_abstract_goal_(H1,H2,Guard,Body,ACs,AG),
QAG = AG,
ai_observation_memoed_abstract_goal(RuleNb,AG)
pragma
passive(ID1),
passive(ID2).
ai_observation_abstract_goal_(H1,H2,Guard,G,ACs,AG) :-
% also guard: e.g. b, c(X) ==> Y=X | p(Y).
term_variables((H1,H2,Guard),HVars),
append(H1,H2,Heads),
% variables that are declared to be ground are safe,
ground_vars(Heads,GroundVars),
% so we remove them from the list of 'dangerous' head variables
list_difference_eq(HVars,GroundVars,HV),
ai_observation_abstract_goal(G,ACs,AG,[],HV),!.
% writeln(ai_observation_abstract_goal(G,ACs,AG,[],HV)).
% HV are 'dangerous' variables, all others are fresh and safe
ground_vars([],[]).
ground_vars([H|Hs],GroundVars) :-
functor(H,F,A),
get_constraint_mode(F/A,Mode),
% TOM: fix this code!
head_info(H,A,_Vars,_Susp,_HeadVars,HeadPairs),
head_arg_matches(HeadPairs,Mode,[],_FirstMatching,_VarDict1,[],GroundVars1),
ground_vars(Hs,GroundVars2),
append(GroundVars1,GroundVars2,GroundVars).
ai_observation_abstract_goal((G1,G2),ACs,List,Tail,HV) :- !, % conjunction
ai_observation_abstract_goal(G1,ACs,List,IntermediateList,HV),
ai_observation_abstract_goal(G2,ACs,IntermediateList,Tail,HV).
ai_observation_abstract_goal((G1;G2),ACs,[(ABranch1;ABranch2)|Tail],Tail,HV) :- !, % disjunction
ai_observation_abstract_goal(G1,ACs,ABranch1,[],HV),
ai_observation_abstract_goal(G2,ACs,ABranch2,[],HV).
ai_observation_abstract_goal((G1->G2),ACs,List,Tail,HV) :- !, % if-then
ai_observation_abstract_goal(G1,ACs,List,IntermediateList,HV),
ai_observation_abstract_goal(G2,ACs,IntermediateList,Tail,HV).
ai_observation_abstract_goal(C,ACs,[AC|Tail],Tail,HV) :-
ai_observation_abstract_constraint(C,ACs,AC), !. % CHR constraint
ai_observation_abstract_goal(true,_,Tail,Tail,_) :- !.
ai_observation_abstract_goal(writeln(_),_,Tail,Tail,_) :- !.
% non-CHR constraint is safe if it only binds fresh variables
ai_observation_abstract_goal(G,_,Tail,Tail,HV) :-
builtin_binds_b(G,Vars),
intersect_eq(Vars,HV,[]),
!.
ai_observation_abstract_goal(G,_,[AG|Tail],Tail,_) :-
AG = builtin. % default case if goal is not recognized/safe
ai_observation_is_observed(odom(_,ACSet),AC) :-
\+ ord_memberchk(AC,ACSet).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
unconditional_occurrence(C,O) :-
get_occurrence(C,O,RuleNb,ID),
get_rule(RuleNb,PRule),
PRule = pragma(ORule,_,_,_,_),
copy_term_nat(ORule,Rule),
Rule = rule(H1,H2,Guard,_),
guard_entailment:entails_guard([chr_pp_headvariables(H1,H2)],Guard),
once((
H1 = [Head], H2 == []
;
H2 = [Head], H1 == [], \+ may_trigger(C)
)),
all_distinct_var_args(Head).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Partial wake analysis
%
% In a Var = Var unification do not wake up constraints of both variables,
% but rather only those of one variable.
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:- chr_constraint partial_wake_analysis/0.
:- chr_constraint no_partial_wake/1.
:- chr_option(mode,no_partial_wake(+)).
:- chr_constraint wakes_partially/1.
:- chr_option(mode,wakes_partially(+)).
partial_wake_analysis, occurrence(FA,O,RuleNb,ID,Type), rule(RuleNb,Rule), constraint_mode(FA,ArgModes)
==>
Rule = pragma(rule(H1,H2,Guard,Body),_,_,_,_),
( is_passive(RuleNb,ID) ->
true
; Type == simplification ->
select(H,H1,RestH1),
H =.. [_|Args],
term_variables(Guard,Vars),
partial_wake_args(Args,ArgModes,Vars,FA)
; % Type == propagation ->
select(H,H2,RestH2),
H =.. [_|Args],
term_variables(Guard,Vars),
partial_wake_args(Args,ArgModes,Vars,FA)
).
partial_wake_args([],_,_,_).
partial_wake_args([Arg|Args],[Mode|Modes],Vars,C) :-
( Mode \== (+) ->
( nonvar(Arg) ->
no_partial_wake(C)
; memberchk_eq(Arg,Vars) ->
no_partial_wake(C)
;
true
)
;
true
),
partial_wake_args(Args,Modes,Vars,C).
no_partial_wake(C) \ no_partial_wake(C) <=> true.
no_partial_wake(C) \ wakes_partially(C) <=> fail.
wakes_partially(C) <=> true.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Generate rules that implement chr_show_store/1 functionality.
%
% CLASSIFICATION
% Experimental
% Unused
%
% Generates additional rules:
%
% $show, C1 # ID ==> writeln(C1) pragma passive(ID).
% ...
% $show, Cn # ID ==> writeln(Cn) pragma passive(ID).
% $show <=> true.
generate_show_constraint(Constraints0,Constraints,Rules0,Rules) :-
( chr_pp_flag(show,on) ->
Constraints = ['$show'/0|Constraints0],
generate_show_rules(Constraints0,Rules,[Rule|Rules0]),
inc_rule_count(RuleNb),
Rule = pragma(
rule(['$show'],[],true,true),
ids([0],[]),
[],
no,
RuleNb
)
;
Constraints = Constraints0,
Rules = Rules0
).
generate_show_rules([],Rules,Rules).
generate_show_rules([F/A|Rest],[Rule|Tail],Rules) :-
functor(C,F,A),
inc_rule_count(RuleNb),
Rule = pragma(
rule([],['$show',C],true,writeln(C)),
ids([],[0,1]),
[passive(1)],
no,
RuleNb
),
generate_show_rules(Rest,Tail,Rules).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Custom supension term layout
static_suspension_term(F/A,Suspension) :-
suspension_term_base(F/A,Base),
Arity is Base + A,
functor(Suspension,suspension,Arity).
has_suspension_field(FA,Field) :-
suspension_term_base_fields(FA,Fields),
memberchk(Field,Fields).
suspension_term_base(FA,Base) :-
suspension_term_base_fields(FA,Fields),
length(Fields,Base).
suspension_term_base_fields(FA,Fields) :-
( chr_pp_flag(debugable,on) ->
% 1. ID
% 2. State
% 3. Propagation History
% 4. Generation Number
% 5. Continuation Goal
% 6. Functor
Fields = [id,state,history,generation,continuation,functor]
;
( uses_history(FA) ->
Fields = [id,state,history|Fields2]
; only_ground_indexed_arguments(FA), get_functional_dependency(FA,1,_,_) ->
Fields = [state|Fields2]
;
Fields = [id,state|Fields2]
),
( only_ground_indexed_arguments(FA) ->
get_store_type(FA,StoreType),
basic_store_types(StoreType,BasicStoreTypes),
( memberchk(global_ground,BasicStoreTypes) ->
% 1. ID
% 2. State
% 3. Propagation History
% 4. Global List Prev
Fields2 = [global_list_prev|Fields3]
;
% 1. ID
% 2. State
% 3. Propagation History
Fields2 = Fields3
),
( chr_pp_flag(ht_removal,on)
-> ht_prev_fields(BasicStoreTypes,Fields3)
; Fields3 = []
)
; may_trigger(FA) ->
% 1. ID
% 2. State
% 3. Propagation History
( uses_field(FA,generation) ->
% 4. Generation Number
% 5. Global List Prev
Fields2 = [generation,global_list_prev|Fields3]
;
Fields2 = [global_list_prev|Fields3]
),
( chr_pp_flag(mixed_stores,on),
chr_pp_flag(ht_removal,on)
-> get_store_type(FA,StoreType),
basic_store_types(StoreType,BasicStoreTypes),
ht_prev_fields(BasicStoreTypes,Fields3)
; Fields3 = []
)
;
% 1. ID
% 2. State
% 3. Propagation History
% 4. Global List Prev
Fields2 = [global_list_prev|Fields3],
( chr_pp_flag(mixed_stores,on),
chr_pp_flag(ht_removal,on)
-> get_store_type(FA,StoreType),
basic_store_types(StoreType,BasicStoreTypes),
ht_prev_fields(BasicStoreTypes,Fields3)
; Fields3 = []
)
)
).
ht_prev_fields(Stores,Prevs) :-
ht_prev_fields_int(Stores,PrevsList),
append(PrevsList,Prevs).
ht_prev_fields_int([],[]).
ht_prev_fields_int([H|T],Fields) :-
( H = multi_hash(Indexes)
-> maplist(ht_prev_field,Indexes,FH),
Fields = [FH|FT]
; Fields = FT
),
ht_prev_fields_int(T,FT).
ht_prev_field(Index,Field) :-
concat_atom(['multi_hash_prev-'|Index],Field).
get_static_suspension_term_field(FieldName,FA,StaticSuspension,Field) :-
suspension_term_base_fields(FA,Fields),
nth1(Index,Fields,FieldName), !,
arg(Index,StaticSuspension,Field).
get_static_suspension_term_field(arguments,FA,StaticSuspension,Field) :- !,
suspension_term_base(FA,Base),
StaticSuspension =.. [_|Args],
drop(Base,Args,Field).
get_static_suspension_term_field(FieldName,FA,_StaticSuspension,_Field) :-
chr_error(internal,'Trying to obtain field ~w of ~w, wich does not have it!',[FieldName,FA]).
get_dynamic_suspension_term_field(FieldName,FA,DynamicSuspension,Field,Goal) :-
suspension_term_base_fields(FA,Fields),
nth1(Index,Fields,FieldName), !,
Goal = arg(Index,DynamicSuspension,Field).
get_dynamic_suspension_term_field(arguments,FA,DynamicSuspension,Field,Goal) :- !,
static_suspension_term(FA,StaticSuspension),
get_static_suspension_term_field(arguments,FA,StaticSuspension,Field),
Goal = (DynamicSuspension = StaticSuspension).
get_dynamic_suspension_term_field(argument(I),FA,DynamicSuspension,Field,Goal) :- !,
suspension_term_base(FA,Base),
Index is I + Base,
Goal = arg(Index,DynamicSuspension,Field).
get_dynamic_suspension_term_field(FieldName,FA,_DynamicSuspension,_Field,_Goal) :-
chr_error(internal,'Dynamic goal to get ~w of ~w, which does not have this field!',[FieldName,FA]).
set_dynamic_suspension_term_field(FieldName,FA,DynamicSuspension,Field,Goal) :-
suspension_term_base_fields(FA,Fields),
nth1(Index,Fields,FieldName), !,
Goal = setarg(Index,DynamicSuspension,Field).
set_dynamic_suspension_term_field(FieldName,FA,_DynamicSuspension,_Field,_Goal) :-
chr_error(internal,'Dynamic goal to set ~w of ~w, which does not have this field!',[FieldName,FA]).
basic_store_types(multi_store(Types),Types) :- !.
basic_store_types(Type,[Type]).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
:- chr_constraint
phase_end/1,
delay_phase_end/2.
:- chr_option(mode,phase_end(+)).
:- chr_option(mode,delay_phase_end(+,?)).
phase_end(Phase) \ delay_phase_end(Phase,Goal) <=> call(Goal).
% phase_end(Phase) <=> true.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
:- chr_constraint
does_use_history/2,
uses_history/1,
novel_production_call/4.
:- chr_option(mode,uses_history(+)).
:- chr_option(mode,does_use_history(+,+)).
:- chr_option(mode,novel_production_call(+,+,?,?)).
does_use_history(FA,Occ) \ does_use_history(FA,Occ) <=> true.
does_use_history(FA,_) \ uses_history(FA) <=> true.
uses_history(_FA) <=> fail.
does_use_history(FA,Occ) \ novel_production_call(FA,Occ,PossibleGoal,Goal) <=> Goal = PossibleGoal.
novel_production_call(FA,_,_PossibleGoal,Goal) <=> Goal = true.
:- chr_constraint
does_use_field/2,
uses_field/2.
:- chr_option(mode,uses_field(+,+)).
:- chr_option(mode,does_use_field(+,+)).
does_use_field(FA,Field) \ does_use_field(FA,Field) <=> true.
does_use_field(FA,Field) \ uses_field(FA,Field) <=> true.
uses_field(_FA,_Field) <=> fail.
:- chr_constraint
uses_state/2,
if_used_state/5,
used_states_known/0.
:- chr_option(mode,uses_state(+,+)).
:- chr_option(mode,if_used_state(+,+,?,?,?)).
% states ::= not_stored_yet | passive | active | triggered | removed
%
% allocate CREATES not_stored_yet
% remove CHECKS not_stored_yet
% activate CHECKS not_stored_yet
%
% ==> no allocate THEN no not_stored_yet
% recurs CREATES inactive
% lookup CHECKS inactive
% insert CREATES active
% activate CREATES active
% lookup CHECKS active
% recurs CHECKS active
% runsusp CREATES triggered
% lookup CHECKS triggered
%
% ==> no runsusp THEN no triggered
% remove CREATES removed
% runsusp CHECKS removed
% lookup CHECKS removed
% recurs CHECKS removed
%
% ==> no remove THEN no removed
% ==> no allocate, no remove, no active/inactive distinction THEN no state at all...
uses_state(Constraint,State) \ uses_state(Constraint,State) <=> true.
used_states_known, uses_state(Constraint,State) \ if_used_state(Constraint,State,Used,NotUsed,ResultGoal)
<=> ResultGoal = Used.
used_states_known \ if_used_state(Constraint,State,Used,NotUsed,ResultGoal)
<=> ResultGoal = NotUsed.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% CHECK STOREDNESS ANNOTATIONS AND GENERATE DEFAULT SIMPLIFICATION RULES
% (Feature for SSS)
%
% 1. Checking
% ~~~~~~~~~~~
%
% When the programmer enables the `declare_stored_constraints' option, i.e. writes
%
% :- chr_option(declare_stored_constraints,on).
%
% the compiler will check for the storedness of constraints.
%
% By default, the compiler assumes that the programmer wants his constraints to
% be never-stored. Hence, a warning will be issues when a constraint is actually
% stored.
%
% Such warnings are suppressed, if the programmer adds the `# stored' modifier
% to a constraint declaration, i.e. writes
%
% :- chr_constraint c(...) # stored.
%
% In that case a warning is issued when the constraint is never-stored.
%
% NOTE: Checking is only performed if `storage_analysis' is on. Otherwise, all
% constraints are stored anyway.
%
%
% 2. Rule Generation
% ~~~~~~~~~~~~~~~~~~
%
% When the programmer enables the `declare_stored_constraints' option, i.e. writes
%
% :- chr_option(declare_stored_constraints,on).
%
% the compiler will generate default simplification rules for constraints.
%
% By default, no default rule is generated for a constraint. However, if the
% programmer writes a default/1 annotation in the constraint declaration, i.e. writes
%
% :- chr_constraint c(...) # default(Goal).
%
% where `Goal' is a ground and callable goal (e.g. `true', `fail' or `throw(error)'),
% the compiler generates a rule:
%
% c(_,...,_) <=> Goal.
%
% at the end of the program. If multiple default rules are generated, for several constraints,
% then the order of the default rules is not specified.
:- chr_constraint stored_assertion/1.
:- chr_option(mode,stored_assertion(+)).
:- chr_option(type_declaration,stored_assertion(constraint)).
:- chr_constraint never_stored_default/2.
:- chr_option(mode,never_stored_default(+,?)).
:- chr_option(type_declaration,never_stored_default(constraint,any)).
% Rule Generation
% ~~~~~~~~~~~~~~~
generate_never_stored_rules(Constraints,Rules) :-
( chr_pp_flag(declare_stored_constraints,on) ->
never_stored_rules(Constraints,Rules)
;
Rules = []
).
:- chr_constraint never_stored_rules/2.
:- chr_option(mode,never_stored_rules(+,?)).
:- chr_option(type_declaration,never_stored_rules(list(constraint),any)).
never_stored_rules([],Rules) <=> Rules = [].
never_stored_default(Constraint,Goal) \ never_stored_rules([Constraint|Constraints],Rules) <=>
Constraint = F/A,
functor(Head,F,A),
inc_rule_count(RuleNb),
Rule = pragma(
rule([Head],[],true,Goal),
ids([0],[]),
[],
no,
RuleNb
),
Rules = [Rule|Tail],
never_stored_rules(Constraints,Tail).
never_stored_rules([_|Constraints],Rules) <=>
never_stored_rules(Constraints,Rules).
% Checking
% ~~~~~~~~
check_storedness_assertions(Constraints) :-
( chr_pp_flag(storage_analysis,on), chr_pp_flag(declare_stored_constraints,on) ->
forall(Constraint,Constraints,check_storedness_assertion(Constraint))
;
true
).
:- chr_constraint check_storedness_assertion/1.
:- chr_option(mode,check_storedness_assertion(+)).
:- chr_option(type_declaration,check_storedness_assertion(constraint)).
check_storedness_assertion(Constraint), stored_assertion(Constraint)
<=> ( is_stored(Constraint) ->
true
;
chr_warning(assertion_failed,'Constraint ~w is not stored. However, it was asserted to be stored.\n',[Constraint])
).
never_stored_default(Constraint,_) \ check_storedness_assertion(Constraint)
<=> ( is_finally_stored(Constraint) ->
chr_warning(assertion_failed,'Constraint ~w is stored. However, it was asserted not to be stored.\n',[Constraint])
; is_stored(Constraint) ->
chr_warning(assertion_failed,'Constraint ~w is temporarily stored. However, it was asserted not to be stored.\n',[Constraint])
;
true
).
% never-stored, no default goal
check_storedness_assertion(Constraint)
<=> ( is_finally_stored(Constraint) ->
chr_warning(assertion_failed,'Constraint ~w is stored. However, it was asserted not to be stored.\n',[Constraint])
; is_stored(Constraint) ->
chr_warning(assertion_failed,'Constraint ~w is temporarily stored. However, it was asserted not to be stored.\n',[Constraint])
;
true
).
%^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
% success continuation analysis
% TODO
% also use for forward jumping improvement!
% use Prolog indexing for generated code
%
% EXPORTED
%
% should_skip_to_next_id(C,O)
%
% get_occurrence_code_id(C,O,Id)
%
%vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
continuation_analysis(ConstraintSymbols) :-
maplist(analyse_continuations,ConstraintSymbols).
analyse_continuations(C) :-
% 1. compute success continuations of the
% occurrences of constraint C
continuation_analysis(C,1),
% 2. determine for which occurrences
% to skip to next code id
get_max_occurrence(C,MO),
LO is MO + 1,
bulk_propagation(C,1,LO),
% 3. determine code id for each occurrence
set_occurrence_code_id(C,1,0).
% 1. Compute the success continuations of constrait C
%-------------------------------------------------------------------------------
continuation_analysis(C,O) :-
get_max_occurrence(C,MO),
( O > MO ->
true
; O == MO ->
NextO is O + 1,
continuation_occurrence(C,O,NextO)
;
constraint_continuation(C,O,MO,NextO),
continuation_occurrence(C,O,NextO),
NO is O + 1,
continuation_analysis(C,NO)
).
constraint_continuation(C,O,MO,NextO) :-
( get_occurrence_head(C,O,Head) ->
NO is O + 1,
( between(NO,MO,NextO),
get_occurrence_head(C,NextO,NextHead),
unifiable(Head,NextHead,_) ->
true
;
NextO is MO + 1
)
; % current occurrence is passive
NextO = MO
).
get_occurrence_head(C,O,Head) :-
get_occurrence(C,O,RuleNb,Id),
\+ is_passive(RuleNb,Id),
get_rule(RuleNb,Rule),
Rule = pragma(rule(H1,H2,_,_),ids(Ids1,Ids2),_,_,_),
( select2(Id,Head,Ids1,H1,_,_) -> true
; select2(Id,Head,Ids2,H2,_,_)
).
:- chr_constraint continuation_occurrence/3.
:- chr_option(mode,continuation_occurrence(+,+,+)).
:- chr_constraint get_success_continuation_occurrence/3.
:- chr_option(mode,get_success_continuation_occurrence(+,+,-)).
continuation_occurrence(C,O,NO) \ get_success_continuation_occurrence(C,O,X)
<=>
X = NO.
get_success_continuation_occurrence(C,O,X)
<=>
chr_error(internal,'Success continuation not found for ~w.\n',[C:O]).
% 2. figure out when to skip to next code id
%-------------------------------------------------------------------------------
% don't go beyond the last occurrence
% we have to go to next id for storage here
:- chr_constraint skip_to_next_id/2.
:- chr_option(mode,skip_to_next_id(+,+)).
:- chr_constraint should_skip_to_next_id/2.
:- chr_option(mode,should_skip_to_next_id(+,+)).
skip_to_next_id(C,O) \ should_skip_to_next_id(C,O)
<=>
true.
should_skip_to_next_id(_,_)
<=>
fail.
:- chr_constraint bulk_propagation/3.
:- chr_option(mode,bulk_propagation(+,+,+)).
max_occurrence(C,MO) \ bulk_propagation(C,O,_)
<=>
O >= MO
|
skip_to_next_id(C,O).
% we have to go to the next id here because
% a predecessor needs it
bulk_propagation(C,O,LO)
<=>
LO =:= O + 1
|
skip_to_next_id(C,O),
get_max_occurrence(C,MO),
NLO is MO + 1,
bulk_propagation(C,LO,NLO).
% we have to go to the next id here because
% we're running into a simplification rule
% IMPROVE: propagate back to propagation predecessor (IF ANY)
occurrence(C,NO,_,_,simplification) \ bulk_propagation(C,O,LO)
<=>
NO =:= O + 1
|
skip_to_next_id(C,O),
get_max_occurrence(C,MO),
NLO is MO + 1,
bulk_propagation(C,NO,NLO).
% we skip the next id here
% and go to the next occurrence
continuation_occurrence(C,O,NextO) \ bulk_propagation(C,O,LO)
<=>
NextO > O + 1
|
NLO is min(LO,NextO),
NO is O + 1,
bulk_propagation(C,NO,NLO).
% default case
% err on the safe side
bulk_propagation(C,O,LO)
<=>
skip_to_next_id(C,O),
get_max_occurrence(C,MO),
NLO is MO + 1,
NO is O + 1,
bulk_propagation(C,NO,NLO).
skip_to_next_id(C,O) \ skip_to_next_id(C,O) <=> true.
% if this occurrence is passive, but has to skip,
% then the previous one must skip instead...
% IMPROVE reasoning is conservative
occurrence(C,O,RuleNb,Id,_), passive(RuleNb,Id), skip_to_next_id(C,O)
==>
O > 1
|
PO is O - 1,
skip_to_next_id(C,PO).
% 3. determine code id of each occurrence
%-------------------------------------------------------------------------------
:- chr_constraint set_occurrence_code_id/3.
:- chr_option(mode,set_occurrence_code_id(+,+,+)).
:- chr_constraint occurrence_code_id/3.
:- chr_option(mode,occurrence_code_id(+,+,+)).
% stop at the end
set_occurrence_code_id(C,O,IdNb)
<=>
get_max_occurrence(C,MO),
O > MO
|
occurrence_code_id(C,O,IdNb).
% passive occurrences don't change the code id
occurrence(C,O,RuleNb,Id,_), passive(RuleNb,Id) \ set_occurrence_code_id(C,O,IdNb)
<=>
occurrence_code_id(C,O,IdNb),
NO is O + 1,
set_occurrence_code_id(C,NO,IdNb).
occurrence(C,O,RuleNb,Id,simplification) \ set_occurrence_code_id(C,O,IdNb)
<=>
occurrence_code_id(C,O,IdNb),
NO is O + 1,
set_occurrence_code_id(C,NO,IdNb).
occurrence(C,O,RuleNb,Id,propagation), skip_to_next_id(C,O) \ set_occurrence_code_id(C,O,IdNb)
<=>
occurrence_code_id(C,O,IdNb),
NO is O + 1,
NIdNb is IdNb + 1,
set_occurrence_code_id(C,NO,NIdNb).
occurrence(C,O,RuleNb,Id,propagation) \ set_occurrence_code_id(C,O,IdNb)
<=>
occurrence_code_id(C,O,IdNb),
NO is O + 1,
set_occurrence_code_id(C,NO,IdNb).
% occurrence_code_id(C,O,IdNb) ==> writeln(occurrence_code_id(C,O,IdNb)).
:- chr_constraint get_occurrence_code_id/3.
:- chr_option(mode,get_occurrence_code_id(+,+,-)).
occurrence_code_id(C,O,IdNb) \ get_occurrence_code_id(C,O,X)
<=>
X = IdNb.
get_occurrence_code_id(C,O,X)
<=>
( O == 0 ->
true % X = 0
;
format('no occurrence code for ~w!\n',[C:O])
).
get_success_continuation_code_id(C,O,NextId) :-
get_success_continuation_occurrence(C,O,NextO),
get_occurrence_code_id(C,NextO,NextId).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% COLLECT CONSTANTS FOR INLINING
%
% for SSS
%%% TODO: APPLY NEW DICT FORMAT DOWNWARDS
% collect_constants(+rules,+ast_rules,+constraint_symbols,+clauses) {{{
collect_constants(Rules,AstRules,Constraints,Clauses0) :-
( not_restarted, chr_pp_flag(experiment,on) ->
( chr_pp_flag(sss,on) ->
Dictionary = [fep/4-[2,3]-[[a,b]-fep1,[c,d]-fep2]-no],
copy_term_nat(Clauses0,Clauses),
flatten_clauses(Clauses,Dictionary,FlatClauses),
install_new_declarations_and_restart(FlatClauses)
;
maplist(collect_rule_constants(Constraints),AstRules),
( chr_pp_flag(verbose,on) ->
print_chr_constants
;
true
),
( chr_pp_flag(experiment,on) ->
flattening_dictionary(Constraints,Dictionary),
copy_term_nat(Clauses0,Clauses),
flatten_clauses(Clauses,Dictionary,FlatClauses),
install_new_declarations_and_restart(FlatClauses)
;
true
)
)
;
true
).
:- chr_constraint chr_constants/1.
:- chr_option(mode,chr_constants(+)).
:- chr_constraint get_chr_constants/1.
chr_constants(Constants) \ get_chr_constants(Q) <=> Q = Constants.
get_chr_constants(Q) <=> chr_warning(internal,'No constants found for key ~w.\n',[Key]), Q = [].
% collect_rule_constants(+constraint_symbols,+ast_rule) {{{
collect_rule_constants(Constraints,AstRule) :-
AstRule = ast_rule(AstHead,_,_,AstBody,_),
collect_head_constants(AstHead),
collect_body_constants(AstBody,Constraints).
collect_head_constants(simplification(H1)) :-
maplist(collect_constraint_constants,H1).
collect_head_constants(propagation(H2)) :-
maplist(collect_constraint_constants,H2).
collect_head_constants(simpagation(H1,H2)) :-
maplist(collect_constraint_constants,H1),
maplist(collect_constraint_constants,H2).
collect_body_constants(AstBody,Constraints) :-
maplist(collect_goal_constants(Constraints),AstBody).
collect_goal_constants(Constraints,Goal) :-
( ast_nonvar(Goal) ->
ast_symbol(Goal,Symbol),
( memberchk(Symbol,Constraints) ->
ast_term_to_term(Goal,Term),
ast_args(Goal,Arguments),
collect_constraint_constants(chr_constraint(Symbol,Arguments,Term))
; Symbol == (:)/2,
ast_args(Goal,[Arg1,Goal2]),
Arg1 = atomic(Mod),
get_target_module(Module),
Mod == Module,
ast_nonvar(Goal2),
ast_symbol(Goal2,Symbol2),
memberchk(Symbol2,Constraints) ->
ast_term_to_term(Goal2,Term2),
ast_args(Goal2,Arguments2),
collect_constraint_constants(chr_constraint(Symbol2,Arguments2,Term2))
;
true
)
;
true
).
collect_constraint_constants(Head) :-
Head = chr_constraint(Symbol,Arguments,_),
get_constraint_type_det(Symbol,Types),
collect_all_arg_constants(Arguments,Types,[]).
collect_all_arg_constants([],[],Constants) :-
( Constants \== [] ->
add_chr_constants(Constants)
;
true
).
collect_all_arg_constants([Arg|Args],[Type|Types],Constants0) :-
unalias_type(Type,NormalizedType),
( is_chr_constants_type(NormalizedType,Key,_) ->
( ast_ground(Arg) ->
ast_term_to_term(Arg,Term),
collect_all_arg_constants(Args,Types,[Key-Term|Constants0])
; % no useful information here
true
)
;
collect_all_arg_constants(Args,Types,Constants0)
).
add_chr_constants(Pairs) :-
keysort(Pairs,SortedPairs),
add_chr_constants_(SortedPairs).
:- chr_constraint add_chr_constants_/1.
:- chr_option(mode,add_chr_constants_(+)).
add_chr_constants_(Constants), chr_constants(MoreConstants) <=>
sort([Constants|MoreConstants],NConstants),
chr_constants(NConstants).
add_chr_constants_(Constants) <=>
chr_constants([Constants]).
% }}}
:- chr_constraint print_chr_constants/0. % {{{
print_chr_constants, chr_constants(Constants) # Id ==>
format('\t* chr_constants : ~w.\n',[Constants])
pragma passive(Id).
print_chr_constants <=>
true.
% }}}
% flattening_dictionary(+constraint_symbols,-dictionary) {{{
flattening_dictionary([],[]).
flattening_dictionary([CS|CSs],Dictionary) :-
( flattening_dictionary_entry(CS,Entry) ->
Dictionary = [Entry|Rest]
;
Dictionary = Rest
),
flattening_dictionary(CSs,Rest).
flattening_dictionary_entry(CS,Entry) :-
get_constraint_type_det(CS,Types),
constant_positions(Types,1,Positions,Keys,Handler,MaybeEnum),
( Positions \== [] -> % there are chr_constant arguments
pairup(Keys,Constants,Pairs0),
keysort(Pairs0,Pairs),
Entry = CS-Positions-Specs-Handler,
get_chr_constants(ConstantsList),
findall(Spec,
( member(Pairs,ConstantsList)
, flat_spec(CS,Positions,Constants,Spec)
),
Specs)
; MaybeEnum == yes ->
enum_positions(Types,1,EnumPositions,ConstantsLists,EnumHandler),
Entry = CS-EnumPositions-Specs-EnumHandler,
findall(Spec,
( cartesian_product(Terms,ConstantsLists)
, flat_spec(CS,EnumPositions,Terms,Spec)
),
Specs)
).
constant_positions([],_,[],[],no,no).
constant_positions([Type|Types],I,Positions,Keys,Handler,MaybeEnum) :-
unalias_type(Type,NormalizedType),
( is_chr_constants_type(NormalizedType,Key,ErrorHandler) ->
compose_error_handlers(ErrorHandler,NHandler,Handler),
Positions = [I|NPositions],
Keys = [Key|NKeys],
MaybeEnum = NMaybeEnum
;
( is_chr_enum_type(NormalizedType,_,_) ->
MaybeEnum = yes
;
MaybeEnum = NMaybeEnum
),
NPositions = Positions,
NKeys = Keys,
NHandler = Handler
),
J is I + 1,
constant_positions(Types,J,NPositions,NKeys,NHandler,NMaybeEnum).
compose_error_handlers(no,Handler,Handler).
compose_error_handlers(yes(Handler),_,yes(Handler)).
enum_positions([],_,[],[],no).
enum_positions([Type|Types],I,Positions,ConstantsLists,Handler) :-
unalias_type(Type,NormalizedType),
( is_chr_enum_type(NormalizedType,Constants,ErrorHandler) ->
compose_error_handlers(ErrorHandler,NHandler,Handler),
Positions = [I|NPositions],
ConstantsLists = [Constants|NConstantsLists]
; Positions = NPositions,
ConstantsLists = NConstantsLists,
Handler = NHandler
),
J is I + 1,
enum_positions(Types,J,NPositions,NConstantsLists,NHandler).
cartesian_product([],[]).
cartesian_product([E|Es],[L|Ls]) :-
member(E,L),
cartesian_product(Es,Ls).
flat_spec(C/N,Positions,Terms,Spec) :-
Spec = Terms - Functor,
term_to_atom(Terms,TermsAtom),
term_to_atom(Positions,PositionsAtom),
atom_concat_list(['$flat_',C,'/',N,'___',PositionsAtom,'___',TermsAtom],Functor).
% }}}
% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% RESTART AFTER FLATTENING {{{
restart_after_flattening(Declarations,Declarations) :-
nb_setval('$chr_restart_after_flattening',started).
restart_after_flattening(_,Declarations) :-
nb_getval('$chr_restart_after_flattening',restart(Declarations)),
nb_setval('$chr_restart_after_flattening',restarted).
not_restarted :-
nb_getval('$chr_restart_after_flattening',started).
install_new_declarations_and_restart(Declarations) :-
nb_setval('$chr_restart_after_flattening',restart(Declarations)),
fail. /* fails to choicepoint of restart_after_flattening */
% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% FLATTENING {{{
% DONE
% -) generate dictionary from collected chr_constants
% enable with :- chr_option(experiment,on).
% -) issue constraint declarations for constraints not present in
% dictionary
% -) integrate with CHR compiler
% -) pass Mike's test code (full syntactic support for current CHR code)
% -) rewrite the body using the inliner
%
% TODO:
% -) refined semantics correctness issue
% -) incorporate chr_enum into dictionary generation
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
flatten_clauses(Clauses,Dict,NClauses) :-
flatten_readcontent(Clauses,Rules,Symbols,ModeDecls,_TypeDefs,TypeDecls,RestClauses),
flatten_clauses_(Dict,Rules,RestClauses,Symbols,ModeDecls,TypeDecls,NClauses).
flatten_clauses_(Dict,Clauses,RestClauses,Symbols,ModeDecls,TypeDecls,NClauses) :-
auxiliary_constraints_declarations(Dict,ModeDecls,TypeDecls,NClauses0),
dispatching_rules(Dict,NClauses1),
declarations(Symbols,Dict,ModeDecls,TypeDecls,NClauses2),
flatten_rules(Clauses,Dict,NClauses3),
append([RestClauses,NClauses0,NClauses1,NClauses2,NClauses3],NClauses).
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% Declarations for non-flattened constraints
% declarations(+constraint_symbols,+dict,+mode_decls,+type_decls,-clauses) {{{
declarations(ConstraintSymbols,Dict,ModeDecls,TypeDecls,Declarations) :-
findall(Symbol,(member(Symbol,ConstraintSymbols), \+ memberchk(Symbol-_-_-_,Dict)),Symbols),
maplist(declaration(ModeDecls,TypeDecls),Symbols,DeclarationsList),
flatten(DeclarationsList,Declarations).
declaration(ModeDecls,TypeDecls,ConstraintSymbol,
[(:- chr_constraint ConstraintSymbol),
(:- chr_option(mode,ModeDeclPattern)),
(:- chr_option(type_declaration,TypeDeclPattern))
]) :-
ConstraintSymbol = Functor / Arity,
% print optional mode declaration
functor(ModeDeclPattern,Functor,Arity),
( memberchk(ModeDeclPattern,ModeDecls) ->
true
;
replicate(Arity,(?),Modes),
ModeDeclPattern =.. [_|Modes]
),
% print optional type declaration
functor(TypeDeclPattern,Functor,Arity),
( memberchk(TypeDeclPattern,TypeDecls) ->
true
;
replicate(Arity,any,Types),
TypeDeclPattern =.. [_|Types]
).
% }}}
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% read clauses from file
% CHR are returned
% declared constaints are returned
% type definitions are returned and printed
% mode declarations are returned
% other clauses are returned
% flatten_readcontent(+clauses,-rules,-symbols,-mode_decls,-type_defs,-type_decls,-rest_clauses) {{{
flatten_readcontent([],[],[],[],[],[],[]).
flatten_readcontent([Clause|RClauses],Rules,ConstraintSymbols,ModeDecls,TypeDefs,TypeDecls,RestClauses) :-
% read(Clause),
( Clause == end_of_file ->
Rules = [],
ConstraintSymbols = [],
ModeDecls = [],
TypeDecls = [],
TypeDefs = [],
RestClauses = []
; crude_is_rule(Clause) ->
Rules = [Clause|RestRules],
flatten_readcontent(RClauses,RestRules,ConstraintSymbols,ModeDecls,TypeDefs,TypeDecls,RestClauses)
; pure_is_declaration(Clause,SomeConstraintSymbols,SomeModeDecls,SomeTypeDecls) ->
append(SomeConstraintSymbols,RestConstraintSymbols,ConstraintSymbols),
append(SomeModeDecls,RestModeDecls,ModeDecls),
append(SomeTypeDecls,RestTypeDecls,TypeDecls),
flatten_readcontent(RClauses,Rules,RestConstraintSymbols,RestModeDecls,TypeDefs,RestTypeDecls,RestClauses)
; is_mode_declaration(Clause,ModeDecl) ->
ModeDecls = [ModeDecl|RestModeDecls],
flatten_readcontent(RClauses,Rules,ConstraintSymbols,RestModeDecls,TypeDefs,TypeDecls,RestClauses)
; is_type_declaration(Clause,TypeDecl) ->
TypeDecls = [TypeDecl|RestTypeDecls],
flatten_readcontent(RClauses,Rules,ConstraintSymbols,ModeDecls,TypeDefs,RestTypeDecls,RestClauses)
; is_type_definition(Clause,TypeDef) ->
RestClauses = [Clause|NRestClauses],
TypeDefs = [TypeDef|RestTypeDefs],
flatten_readcontent(RClauses,Rules,ConstraintSymbols,ModeDecls,RestTypeDefs,TypeDecls,NRestClauses)
; ( Clause = (:- op(A,B,C)) ->
% assert operators in order to read and print them out properly
op(A,B,C)
;
true
),
RestClauses = [Clause|NRestClauses],
flatten_readcontent(RClauses,Rules,ConstraintSymbols,ModeDecls,TypeDefs,TypeDecls,NRestClauses)
).
crude_is_rule((_ @ _)).
crude_is_rule((_ pragma _)).
crude_is_rule((_ ==> _)).
crude_is_rule((_ <=> _)).
pure_is_declaration(D, Constraints,Modes,Types) :- %% constraint declaration
D = (:- Decl), Decl =.. [F,Cs], F == (chr_constraint),
conj2list(Cs,Constraints0),
pure_extract_type_mode(Constraints0,Constraints,Modes,Types).
pure_extract_type_mode([],[],[],[]).
pure_extract_type_mode([F/A|R],[F/A|R2],Modes,Types) :- !,
pure_extract_type_mode(R,R2,Modes,Types).
pure_extract_type_mode([C|R],[ConstraintSymbol|R2],[Mode|Modes],Types) :-
functor(C,F,A),
ConstraintSymbol = F/A,
C =.. [_|Args],
extract_types_and_modes(Args,ArgTypes,ArgModes),
Mode =.. [F|ArgModes],
( forall(member(ArgType,ArgTypes),ArgType == any) ->
Types = RTypes
;
Types = [Type|RTypes],
Type =.. [F|ArgTypes]
),
pure_extract_type_mode(R,R2,Modes,RTypes).
is_mode_declaration((:- chr_option(mode,ModeDecl)),ModeDecl).
is_type_declaration((:- chr_option(type_declaration,TypeDecl)),TypeDecl).
% }}}
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% DECLARATIONS FOR FLATTENED CONSTRAINTS
% including mode and type declarations
% auxiliary_constraints_declarations(+dict,+mode_decls,+type_decls,-constraint_specs) {{{
auxiliary_constraints_declarations(Dict,ModeDecls,TypeDecls,ConstraintSpecs) :-
findall(ConstraintSpec,auxiliary_constraints_declaration(Dict,ModeDecls,TypeDecls,ConstraintSpec),ConstraintSpecs0),
flatten(ConstraintSpecs0,ConstraintSpecs).
auxiliary_constraints_declaration(Dict,ModeDecls,TypeDecls,
[(:- chr_constraint ConstraintSpec),
(:- chr_option(mode,NewModeDecl)),
(:- chr_option(type_declaration,NewTypeDecl))]) :-
member(C/N-I-SFs-_,Dict),
arg_modes(C,N,ModeDecls,Modes),
specialize_modes(Modes,I,SpecializedModes),
arg_types(C,N,TypeDecls,Types),
specialize_types(Types,I,SpecializedTypes),
length(I,IndexSize),
AN is N - IndexSize,
member(_Term-F,SFs),
ConstraintSpec = F/AN,
NewModeDecl =.. [F|SpecializedModes],
NewTypeDecl =.. [F|SpecializedTypes].
arg_modes(C,N,ModeDecls,ArgModes) :-
functor(ConstraintPattern,C,N),
( memberchk(ConstraintPattern,ModeDecls) ->
ConstraintPattern =.. [_|ArgModes]
;
replicate(N,?,ArgModes)
).
specialize_modes(Modes,I,SpecializedModes) :-
split_args(I,Modes,_,SpecializedModes).
arg_types(C,N,TypeDecls,ArgTypes) :-
functor(ConstraintPattern,C,N),
( memberchk(ConstraintPattern,TypeDecls) ->
ConstraintPattern =.. [_|ArgTypes]
;
replicate(N,any,ArgTypes)
).
specialize_types(Types,I,SpecializedTypes) :-
split_args(I,Types,_,SpecializedTypes).
% }}}
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% DISPATCHING RULES
%
% dispatching_rules(+dict,-newrules)
% {{{
% This code generates a decision tree for calling the appropriate specialized
% constraint based on the particular value of the argument the constraint
% is being specialized on.
%
% In case an error handler is provided, the handler is called with the
% unexpected constraint.
dispatching_rules([],[]).
dispatching_rules([CN-I-SFs-MaybeErrorHandler|Dict], DispatchingRules) :-
constraint_dispatching_rule(SFs,CN,I,MaybeErrorHandler,DispatchingRules,RestDispatchingRules),
dispatching_rules(Dict,RestDispatchingRules).
constraint_dispatching_rule(SFs,C/N,I,MaybeErrorHandler,Rules,RestRules) :-
( increasing_numbers(I,1) ->
/* index on first arguments */
Rules0 = Rules,
NCN = C/N
;
/* reorder arguments for 1st argument indexing */
functor(Head,C,N),
Head =.. [_|Args],
split_args(I,Args,GroundArgs,OtherArgs),
append(GroundArgs,OtherArgs,ShuffledArgs),
atom_concat(C,'_$shuffled',NC),
Body =.. [NC|ShuffledArgs],
[(Head :- Body)|Rules0] = Rules,
NCN = NC / N
),
Context = swap(C,I),
dispatching_rule_term_cases(SFs,I,NCN,MaybeErrorHandler,Context,Rules0,RestRules).
increasing_numbers([],_).
increasing_numbers([X|Ys],X) :-
Y is X + 1,
increasing_numbers(Ys,Y).
dispatching_rule_term_cases(SFs,I,NC/N,MaybeErrorHandler,Context,Rules,RestRules) :-
length(I,IndexLength),
once(pairup(TermLists,Functors,SFs)),
maplist(head_tail,TermLists,Heads,Tails),
Payload is N - IndexLength,
maplist(wrap_in_functor(dispatching_action),Functors,Actions),
dispatch_trie_index(Heads,Tails,Payload,MaybeErrorHandler,Context,Actions,NC,Rules,RestRules).
dispatching_action(Functor,PayloadArgs,Goal) :-
Goal =.. [Functor|PayloadArgs].
dispatch_trie_index(Patterns,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Prefix,Clauses,Tail) :-
dispatch_trie_step(Patterns,Prefix,Prefix,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Clauses,Tail).
dispatch_trie_step([],_,_,_,[],_,_,[],L,L) :- !.
% length MorePatterns == length Patterns == length Results
dispatch_trie_step(Patterns,Symbol,Prefix,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Clauses,T) :-
MorePatterns = [List|_],
length(List,N),
aggregate_all(set(F/A),
( member(Pattern,Patterns),
functor(Pattern,F,A)
),
FAs),
N1 is N + 1,
dispatch_trie_step_cases(FAs,N1,Patterns,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Symbol,Prefix,Clauses,T).
dispatch_trie_step_cases([],N,_,_,Payload,MaybeErrorHandler,Context,_,Symbol,_,Clauses0,Clauses) :-
( MaybeErrorHandler = yes(ErrorHandler) ->
Clauses0 = [ErrorClause|Clauses],
ErrorClause = (Head :- Body),
Arity is N + Payload,
functor(Head,Symbol,Arity),
reconstruct_original_term(Context,Head,Term),
Body =.. [ErrorHandler,Term]
;
Clauses0 = Clauses
).
dispatch_trie_step_cases([FA|FAs],N,Pattern,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Symbol,Prefix,Clauses,Tail) :-
dispatch_trie_step_case(FA,N,Pattern,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Symbol,Prefix,Clauses,Clauses1),
dispatch_trie_step_cases(FAs,N,Pattern,MorePatterns,Payload,MaybeErrorHandler,Context,Actions,Symbol,Prefix,Clauses1,Tail).
dispatch_trie_step_case(F/A,N,Patterns,MorePatterns,Payload,MaybeErrorHandler,Context0,Actions,Symbol,Prefix,[Clause|List],Tail) :-
Clause = (Head :- Cut, Body),
( MaybeErrorHandler = yes(_) ->
Cut = (!)
;
Cut = true
),
/* Head = Symbol(IndexPattern,V2,...,Vn,Payload) */
N1 is N + Payload,
functor(Head,Symbol,N1),
arg(1,Head,IndexPattern),
Head =.. [_,_|RestArgs],
length(PayloadArgs,Payload),
once(append(Vs,PayloadArgs,RestArgs)),
/* IndexPattern = F(...) */
functor(IndexPattern,F,A),
Context1 = index_functor(F,A,Context0),
IndexPattern =.. [_|Args],
append(Args,RestArgs,RecArgs),
( RecArgs == PayloadArgs ->
/* nothing more to match on */
List = Tail,
rec_cases(Patterns,_,Actions,F/A,_,_,MoreActions),
MoreActions = [Action],
call(Action,PayloadArgs,Body)
; /* more things to match on */
rec_cases(Patterns,MorePatterns,Actions,F/A,Cases,MoreCases,MoreActions),
( MoreActions = [OneMoreAction] ->
/* only one more thing to match on */
MoreCases = [OneMoreCase],
append([Cases,OneMoreCase,PayloadArgs],RecArgs),
List = Tail,
call(OneMoreAction,PayloadArgs,Body)
;
/* more than one thing to match on */
/* [ x1,..., xn]
[xs1,...,xsn]
*/
pairup(Cases,MoreCases,CasePairs),
common_pattern(CasePairs,CommonPatternPair,DiffVars,Differences),
append(Args,Vs,[First|Rest]),
First-Rest = CommonPatternPair,
Context2 = gct([First|Rest],Context1),
fresh_symbol(Prefix,RSymbol),
append(DiffVars,PayloadArgs,RecCallVars),
Body =.. [RSymbol|RecCallVars],
findall(CH-CT,member([CH|CT],Differences),CPairs),
once(pairup(CHs,CTs,CPairs)),
dispatch_trie_step(CHs,RSymbol,Prefix,CTs,Payload,MaybeErrorHandler,Context2,MoreActions,List,Tail)
)
).
% split(list,int,before,at,after).
split([X|Xs],I,Before,At,After) :-
( I == 1 ->
Before = [],
At = X,
After = Xs
;
J is I - 1,
Before = [X|RBefore],
split(Xs,J,RBefore,At,After)
).
% reconstruct_original_term(Context,CurrentTerm,OriginalTerm)
%
% context ::= swap(functor,positions)
% | index_functor(functor,arity,context)
% | gct(Pattern,Context)
reconstruct_original_term(swap(Functor,Positions),Term,OriginalTerm) :-
functor(Term,_,Arity),
functor(OriginalTerm,Functor,Arity),
OriginalTerm =.. [_|OriginalArgs],
split_args(Positions,OriginalArgs,IndexArgs,OtherArgs),
Term =.. [_|Args],
append(IndexArgs,OtherArgs,Args).
reconstruct_original_term(index_functor(Functor,Arity,Context),Term0,OriginalTerm) :-
Term0 =.. [Predicate|Args],
split_at(Arity,Args,IndexArgs,RestArgs),
Index =.. [Functor|IndexArgs],
Term1 =.. [Predicate,Index|RestArgs],
reconstruct_original_term(Context,Term1,OriginalTerm).
reconstruct_original_term(gct(PatternList,Context),Term0,OriginalTerm) :-
copy_term_nat(PatternList,IndexTerms),
term_variables(IndexTerms,Variables),
Term0 =.. [Predicate|Args0],
append(Variables,RestArgs,Args0),
append(IndexTerms,RestArgs,Args1),
Term1 =.. [Predicate|Args1],
reconstruct_original_term(Context,Term1,OriginalTerm).
% }}}
%~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
% SUBSTITUTE CONSTRAINT SYMBOL FUNCTORS
%
% flatten_rules(+rule_clauses,+dict,-rule_clauses).
%
% dict :== list(functor/arity-list(int)-list(list(term)-functor)-maybe(error_handler))
% {{{
flatten_rules(Rules,Dict,FlatRules) :-
flatten_rules1(Rules,Dict,FlatRulesList),
flatten(FlatRulesList,FlatRules).
flatten_rules1([],_,[]).
flatten_rules1([Rule|Rules],Dict,[FlatRules|FlatRulesList]) :-
findall(FlatRule,flatten_rule(Rule,Dict,FlatRule),FlatRules),
flatten_rules1(Rules,Dict,FlatRulesList).
flatten_rule((Name @ Rule),Dict,(Name @ NRule)) :- !,
flatten_rule(Rule,Dict,NRule).
flatten_rule((Rule pragma Pragmas),Dict,(NRule pragma Pragmas)) :- !,
flatten_rule(Rule,Dict,NRule).
flatten_rule((H ==> B),Dict,(NH ==> NB)) :- !,
flatten_heads(H,Dict,NH),
flatten_body(B,Dict,NB).
flatten_rule((H1 \ H2 <=> B),Dict,(NH1 \ NH2 <=> NB)) :- !,
flatten_heads((H1,H2),Dict,(NH1,NH2)),
flatten_body(B,Dict,NB).
flatten_rule((H <=> B),Dict,(NH <=> NB)) :-
flatten_heads(H,Dict,NH),
flatten_body(B,Dict,NB).
flatten_heads((H1,H2),Dict,(NH1,NH2)) :- !,
flatten_heads(H1,Dict,NH1),
flatten_heads(H2,Dict,NH2).
flatten_heads((H # Annotation),Dict,(NH # Annotation)) :- !,
flatten_heads(H,Dict,NH).
flatten_heads(H,Dict,NH) :-
( functor(H,C,N),
memberchk(C/N-ArgPositions-SFs-_,Dict) ->
H =.. [_|AllArgs],
split_args(ArgPositions,AllArgs,GroundArgs,OtherArgs),
member(GroundArgs-Name,SFs),
NH =.. [Name|OtherArgs]
;
NH = H
).
flatten_body((Guard | Body),Dict,(NGuard | NBody)) :- !,
conj2list(Guard,Guards),
maplist(flatten_goal(Dict),Guards,NGuards),
list2conj(NGuards,NGuard),
conj2list(Body,Goals),
maplist(flatten_goal(Dict),Goals,NGoals),
list2conj(NGoals,NBody).
flatten_body(Body,Dict,NBody) :-
conj2list(Body,Goals),
maplist(flatten_goal(Dict),Goals,NGoals),
list2conj(NGoals,NBody).
flatten_goal(Dict,Goal,NGoal) :- var(Goal), !, NGoal = Goal.
flatten_goal(Dict,Goal,NGoal) :-
( is_specializable_goal(Goal,Dict,ArgPositions)
->
specialize_goal(Goal,ArgPositions,NGoal)
; Goal = Mod : TheGoal,
get_target_module(Module),
Mod == Module,
nonvar(TheGoal),
is_specializable_goal(TheGoal,Dict,ArgPositions)
->
specialize_goal(TheGoal,ArgPositions,NTheGoal),
NGoal = Mod : NTheGoal
; partial_eval(Goal,NGoal)
->
true
;
NGoal = Goal
).
%-------------------------------------------------------------------------------%
% Specialize body/guard goal
%-------------------------------------------------------------------------------%
is_specializable_goal(Goal,Dict,ArgPositions) :-
functor(Goal,C,N),
memberchk(C/N-ArgPositions-_-_,Dict),
args(ArgPositions,Goal,Args),
ground(Args).
specialize_goal(Goal,ArgPositions,NGoal) :-
functor(Goal,C,N),
Goal =.. [_|Args],
split_args(ArgPositions,Args,GroundTerms,Others),
flat_spec(C/N,ArgPositions,GroundTerms,_-Functor),
NGoal =.. [Functor|Others].
%-------------------------------------------------------------------------------%
% Partially evaluate predicates
%-------------------------------------------------------------------------------%
% append([],Y,Z) >--> Y = Z
% append(X,[],Z) >--> X = Z
partial_eval(append(L1,L2,L3),NGoal) :-
( L1 == [] ->
NGoal = (L3 = L2)
; L2 == [] ->
NGoal = (L3 = L1)
).
% flatten_path(L1,L2) >--> flatten_path(L1',L2)
% where flatten(L1,L1')
partial_eval(flatten_path(L1,L2),NGoal) :-
nonvar(L1),
flatten(L1,FlatterL1),
FlatterL1 \== L1 ->
NGoal = flatten_path(FlatterL1,L2).
% }}}
% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
dump_code(Clauses) :-
( chr_pp_flag(dump,on) ->
maplist(portray_clause,Clauses)
;
true
).
chr_banner :-
chr_info(banner,'\tThe K.U.Leuven CHR System\n\t\tMain Developer:\tTom Schrijvers\n\t\tContributors:\tJon Sneyers, Bart Demoen, Jan Wielemaker\n\t\tCopyright:\tK.U.Leuven, Belgium\n\t\tURL:\t\thttp://www.cs.kuleuven.be/~~toms/CHR/\n',[]).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% LOCKING {{{
chr_none_locked(Vars,Goal) :-
chr_pp_flag(guard_locks,Flag),
( Flag == off ->
Goal = true
; Flag == on ->
Goal = 'chr none_locked'( Vars)
; Flag == error ->
Goal = 'chr none_error_locked'( Vars)
).
chr_not_locked(Var,Goal) :-
chr_pp_flag(guard_locks,Flag),
( Flag == off ->
Goal = true
; Flag == on ->
Goal = 'chr not_locked'( Var)
; Flag == error ->
Goal = 'chr not_error_locked'( Var)
).
chr_lock(Var,Goal) :-
chr_pp_flag(guard_locks,Flag),
( Flag == off ->
Goal = true
; Flag == on ->
Goal = 'chr lock'( Var)
; Flag == error ->
Goal = 'chr error_lock'( Var)
).
chr_unlock(Var,Goal) :-
chr_pp_flag(guard_locks,Flag),
( Flag == off ->
Goal = true
; Flag == on ->
Goal = 'chr unlock'( Var)
; Flag == error ->
Goal = 'chr unerror_lock'( Var)
).
% }}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% AST representation
% each AST representation caches the original term
%
% ast_term ::= atomic(Term)
% | compound(Functor,Arity,list(ast_term),Term)
% | var(int,Term)
% -- unique integer identifier
% Conversion Predicate {{{
:- chr_type var_id == natural.
term_to_ast_term(Term,AstTerm,VarEnv,NVarEnv) :-
( atomic(Term) ->
AstTerm = atomic(Term),
NVarEnv = VarEnv
; compound(Term) ->
functor(Term,Functor,Arity),
AstTerm = compound(Functor,Arity,AstTerms,Term),
Term =.. [_|Args],
maplist_dcg(chr_translate:term_to_ast_term,Args,AstTerms,VarEnv,NVarEnv)
; var(Term) ->
var_to_ast_term(Term,VarEnv,AstTerm,NVarEnv)
).
var_to_ast_term(Var,Env,AstTerm,NVarEnv) :-
Env = VarDict - VarId,
( lookup_eq(VarDict,Var,AstTerm) ->
NVarEnv = Env
;
AstTerm = var(VarId,Var),
NVarId is VarId + 1,
NVarDict = [Var - AstTerm|VarDict],
NVarEnv = NVarDict - NVarId
).
% ast_constraint ::= chr_constraint(Symbol,Arguments,Constraint)
chr_constraint_to_ast_constraint(CHRConstraint,AstConstraint,VarEnv,NVarEnv) :-
AstConstraint = chr_constraint(Functor/Arity,AstTerms,CHRConstraint),
functor(CHRConstraint,Functor,Arity),
CHRConstraint =.. [_|Arguments],
maplist_dcg(chr_translate:term_to_ast_term,Arguments,AstTerms,VarEnv,NVarEnv).
% ast_head ::= simplification(list(chr_constraint))
% | propagation(list(chr_constraint))
% | simpagation(list(chr_constraint),list(chr_constraint))
% head_id ::= int
% ast_guard ::= list(ast_term)
% ast_body ::= list(ast_term)
% ast_rule ::= ast_rule(ast_head,ast_guard,guard,ast_body,body)
rule_to_ast_rule(Rule,AstRule) :-
AstRule = ast_rule(Head,AstGuard,Guard,AstBody,Body),
Rule = rule(H1,H2,Guard,Body),
EmptyVarEnv = []-1,
( H1 == [] ->
Head = propagation(AstConstraints),
maplist_dcg(chr_translate:chr_constraint_to_ast_constraint,H2,AstConstraints,EmptyVarEnv,VarEnv1)
; H2 == [] ->
Head = simplification(AstConstraints),
maplist_dcg(chr_translate:chr_constraint_to_ast_constraint,H1,AstConstraints,EmptyVarEnv,VarEnv1)
;
Head = simpagation(RemovedAstConstraints,KeptAstConstraints),
maplist_dcg(chr_translate:chr_constraint_to_ast_constraint,H1,RemovedAstConstraints,EmptyVarEnv,VarEnv0),
maplist_dcg(chr_translate:chr_constraint_to_ast_constraint,H2,KeptAstConstraints,VarEnv0,VarEnv1)
),
conj2list(Guard,GuardList),
maplist_dcg(chr_translate:term_to_ast_term,GuardList,AstGuard,VarEnv1,VarEnv2),
conj2list(Body,BodyList),
maplist_dcg(chr_translate:term_to_ast_term,BodyList,AstBody,VarEnv2,_).
pragma_rule_to_ast_rule(pragma(Rule,_,_,_,_),AstRule) :-
rule_to_ast_rule(Rule,AstRule).
check_rule_to_ast_rule(Rule) :-
( rule_to_ast_rule(Rule,AstRule) ->
writeln(AstRule)
;
writeln(failed(rule_to_ast_rule(Rule,AstRule)))
).
% }}}
% AST Utility Predicates {{{
ast_term_to_term(var(_,Var),Var).
ast_term_to_term(atomic(Atom),Atom).
ast_term_to_term(compound(_,_,_,Compound),Compound).
ast_nonvar(atomic(_)).
ast_nonvar(compound(_,_,_,_)).
ast_ground(atomic(_)).
ast_ground(compound(_,_,Arguments,_)) :-
maplist(ast_ground,Arguments).
%------------------------------------------------------------------------------%
% Check whether a term is ground, given a set of variables that are ground.
%------------------------------------------------------------------------------%
ast_is_ground(VarSet,AstTerm) :-
ast_is_ground_(AstTerm,VarSet).
ast_is_ground_(var(VarId,_),VarSet) :-
tree_set_memberchk(VarId,VarSet).
ast_is_ground_(atomic(_),_).
ast_is_ground_(compound(_,_,Arguments,_),VarSet) :-
maplist(ast_is_ground(VarSet),Arguments).
%------------------------------------------------------------------------------%
ast_functor(atomic(Atom),Atom,0).
ast_functor(compound(Functor,Arity,_,_),Functor,Arity).
ast_symbol(atomic(Atom),Atom/0).
ast_symbol(compound(Functor,Arity,_,_),Functor/Arity).
ast_args(atomic(_),[]).
ast_args(compound(_,_,Arguments,_),Arguments).
%------------------------------------------------------------------------------%
% Add variables in a term to a given set.
%------------------------------------------------------------------------------%
ast_term_variables(atomic(_),Set,Set).
ast_term_variables(compound(_,_,Args,_),Set,NSet) :-
ast_term_list_variables(Args,Set,NSet).
ast_term_variables(var(VarId,_),Set,NSet) :-
tree_set_add(Set,VarId,NSet).
ast_term_list_variables(Terms,Set,NSet) :-
fold(Terms,chr_translate:ast_term_variables,Set,NSet).
%------------------------------------------------------------------------------%
ast_constraint_variables(chr_constraint(_,Args,_),Set,NSet) :-
ast_term_list_variables(Args,Set,NSet).
ast_constraint_list_variables(Constraints,Set,NSet) :-
fold(Constraints,chr_translate:ast_constraint_variables,Set,NSet).
ast_head_variables(simplification(H1),Set,NSet) :-
ast_constraint_list_variables(H1,Set,NSet).
ast_head_variables(propagation(H2),Set,NSet) :-
ast_constraint_list_variables(H2,Set,NSet).
ast_head_variables(simpagation(H1,H2),Set,NSet) :-
ast_constraint_list_variables(H1,Set,Set1),
ast_constraint_list_variables(H2,Set1,NSet).
ast_var_memberchk(var(VarId,_),Set) :-
tree_set_memberchk(VarId,Set).
%------------------------------------------------------------------------------%
% Return term based on AST-term with variables mapped.
%------------------------------------------------------------------------------%
ast_instantiate(Map,AstTerm,Term) :-
ast_instantiate_(AstTerm,Map,Term).
ast_instantiate_(var(VarId,_),Map,Term) :-
get_assoc(VarId,Map,Term).
ast_instantiate_(atomic(Atom),_,Atom).
ast_instantiate_(compound(Functor,Arity,Arguments,_),Map,Term) :-
functor(Term,Functor,Arity),
Term =.. [_|Terms],
maplist(ast_instantiate(Map),Arguments,Terms).
%------------------------------------------------------------------------------%
% }}}
%------------------------------------------------------------------------------%
% ast_head_arg_matches_(list(silent_pair(ast_term,var)
% ,modes
% ,map(var_id,...)
% ,set(variables)
% ,list(goal)
% ,vardict
% ,set(variables)
% )
%------------------------------------------------------------------------------%
ast_head_arg_matches_([],[],VarDict,GroundVars,[],VarDict,GroundVars).
ast_head_arg_matches_([silent(Arg-Var)| Rest],[Mode|Modes],VarDict,GroundVars,GoalList,NVarDict,NGroundVars) :- !,
( Mode == (+) ->
ast_term_variables(Arg,GroundVars0,GroundVars),
ast_head_arg_matches_(Rest,Modes,VarDict,GroundVars0,GoalList,NVarDict,NGroundVars)
;
ast_head_arg_matches_(Rest,Modes,VarDict,GroundVars,GoalList,NVarDict,NGroundVars)
).
ast_head_arg_matches_([Arg-Var| Rest],[Mode|Modes],VarDict,GroundVars,GoalList,NVarDict,NGroundVars) :-
( Arg = var(VarId,_) ->
( get_assoc(VarId,VarDict,OtherVar) ->
( Mode = (+) ->
( tree_set_memberchk(VarId,GroundVars) ->
GoalList = [Var = OtherVar | RestGoalList],
GroundVars1 = GroundVars
;
GoalList = [Var == OtherVar | RestGoalList],
tree_set_add(GroundVars,VarId,GroundVars1)
)
;
GoalList = [Var == OtherVar | RestGoalList],
GroundVars1 = GroundVars
),
VarDict1 = VarDict
;
put_assoc(VarId,VarDict,Var,VarDict1),
GoalList = RestGoalList,
( Mode = (+) ->
tree_set_add(GroundVars,VarId,GroundVars1)
;
GroundVars1 = GroundVars
)
),
Pairs = Rest,
RestModes = Modes
; ground(Arg), Arg = '$chr_identifier_match'(ActualArg,IndexType) -> % TODO
identifier_label_atom(IndexType,Var,ActualArg,Goal),
GoalList = [Goal|RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Arg = atomic(Atom) ->
( Mode = (+) ->
GoalList = [ Var = Atom | RestGoalList]
;
GoalList = [ Var == Atom | RestGoalList]
),
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Mode == (+), ast_is_ground(GroundVars,Arg) ->
ast_instantiate(VarDict,Arg,ArgInst),
GoalList = [ Var = ArgInst | RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Mode == (?), ast_is_ground(GroundVars,Arg) ->
ast_instantiate(VarDict,Arg,ArgInst),
GoalList = [ Var == ArgInst | RestGoalList],
VarDict = VarDict1,
GroundVars1 = GroundVars,
Pairs = Rest,
RestModes = Modes
; Arg = compound(Functor,Arity,Arguments,_),
functor(Term,Functor,Arity),
Term =.. [_|Vars],
( Mode = (+) ->
GoalList = [ Var = Term | RestGoalList ]
;
GoalList = [ nonvar(Var), Var = Term | RestGoalList ]
),
pairup(Arguments,Vars,NewPairs),
append(NewPairs,Rest,Pairs),
replicate(N,Mode,NewModes),
append(NewModes,Modes,RestModes),
VarDict1 = VarDict,
GroundVars1 = GroundVars
),
ast_head_arg_matches_(Pairs,RestModes,VarDict1,GroundVars1,RestGoalList,NVarDict,NGroundVars).