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yap-6.3/pl/modules.yap
2014-03-06 02:09:48 +00:00

1003 lines
31 KiB
Prolog
Executable File

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: modules.pl *
* Last rev: *
* mods: *
* comments: module support *
* *
*************************************************************************/
% module handling
'$module'(_,N,P) :-
'$module_dec'(N,P).
'$module'(O,N,P,Opts) :- !,
'$module'(O,N,P),
'$process_module_decls_options'(Opts,module(Opts,N,P)).
'$process_module_decls_options'(Var,Mod) :-
var(Var), !,
'$do_error'(instantiation_error,Mod).
'$process_module_decls_options'([],_) :- !.
'$process_module_decls_options'([H|L],M) :- !,
'$process_module_decls_option'(H,M),
'$process_module_decls_options'(L,M).
'$process_module_decls_options'(T,M) :-
'$do_error'(type_error(list,T),M).
'$process_module_decls_option'(Var,M) :-
var(Var),
'$do_error'(instantiation_error,M).
'$process_module_decls_option'(At,_) :-
atom(At), !,
'$use_module'(At).
'$process_module_decls_option'(library(L),_) :- !,
'$use_module'(library(L)).
'$process_module_decls_option'(hidden(Bool),M) :- !,
'$process_hidden_module'(Bool, M).
'$process_module_decls_option'(Opt,M) :-
'$do_error'(domain_error(module_decl_options,Opt),M).
'$process_hidden_module'(TNew,M) :-
'$convert_true_off_mod3'(TNew, New, M),
source_mode(Old, New),
'$prepare_restore_hidden'(Old,New).
'$convert_true_off_mod3'(true, off, _) :- !.
'$convert_true_off_mod3'(false, on, _) :- !.
'$convert_true_off_mod3'(X, _, M) :-
'$do_error'(domain_error(module_decl_options,hidden(X)),M).
'$prepare_restore_hidden'(Old,Old) :- !.
'$prepare_restore_hidden'(Old,New) :-
recorda('$system_initialisation', source_mode(New,Old), _).
module(N) :-
var(N),
'$do_error'(instantiation_error,module(N)).
module(N) :-
atom(N), !,
% set it as current module.
'$current_module'(_,N).
module(N) :-
'$do_error'(type_error(atom,N),module(N)).
'$module_dec'(N, Ps) :-
'$current_module'(_,N),
source_location(F, _),
'$add_module_on_file'(N, F, Ps).
'$add_module_on_file'(Mod, F, Exports) :-
recorded('$module','$module'(F0,Mod,_,_),R), !,
'$add_preexisting_module_on_file'(F, F0, Mod, Exports, R).
'$add_module_on_file'(Module, F, Exports) :-
'$convert_for_export'(all, Exports, Module, Module, TranslationTab, AllExports0, load_files),
'$add_to_imports'(TranslationTab, Module, Module), % insert ops, at least for now
sort( AllExports0, AllExports ),
( source_location(_, Line) -> true ; Line = 0 ),
recorda('$module','$module'(F,Module,AllExports, Line),_).
'$extend_exports'(F, Exps , NewF) :-
recorded('$module','$module'(NewF,NMod, NewExports, _),_R),
recorded('$module','$module'(F, Module,OriginalExports,Line),R),
'$convert_for_export'(Exps, NewExports, NMod, NMod, _TranslationTab, NewExports1, load_files),
'$add_exports'( NewExports1, OriginalExports, Exports ),
sort( Exports, AllExports ),
erase(R),
recorda('$module','$module'(F,Module,AllExports,Line),_),
fail.
'$extend_exports'(_F, _Module, _NewExports).
'$add_exports'( [], Exports, Exports ).
'$add_exports'( [PI|NewExports], OriginalExports, [PI|Exports] ) :-
% do not check for redefinitions, at least for now.
'$add_exports'( NewExports, OriginalExports, Exports ).
% redefining a previously-defined file, no problem.
'$add_preexisting_module_on_file'(F, F, Mod, Exports, R) :- !,
erase(R),
( recorded('$import','$import'(Mod,_,_,_,_,_),R), erase(R), fail; true),
( source_location(_, Line) -> true ; Line = 0 ),
recorda('$module','$module'(F,Mod,Exports, Line),_).
'$add_preexisting_module_on_file'(F,F0,Mod,Exports,R) :-
repeat,
format(user_error, "The module ~a is being redefined.~n Old file: ~a~n New file: ~a~nDo you really want to redefine it? (y or n)",[Mod,F0,F]),
'$mod_scan'(C), !,
( C is "y" ->
'$add_preexisting_module_on_file'(F, F, Mod, Exports, R)
;
'$do_error'(permission_error(module,redefined,Mod),module(Mod,Exports))
).
'$mod_scan'(C) :-
stream_property(user_input,tty(true)),
stream_property(user_error,tty(true)),
!,
repeat,
get0(C),
'$skipeol'(C),
(C is "y" -> true ; C is "n" -> true ; C is "h" -> true ; C is "e" -> halt(1) ; format(user_error, ' Please answer with ''y'', ''n'', ''e'' or ''h'' ', []), fail), !.
'$mod_scan'(C) :- C is "n".
'$module_produced by'(M, M0, N, K) :-
recorded('$import','$import'(M,M0,_,_,N,K),_), !.
'$module_produced by'(M, M0, N, K) :-
recorded('$import','$import'(MI,M0,G1,_,N,K),_),
functor(G1, N1, K1),
'$module_produced by'(M,MI,N1,K1).
% expand module names in a clause
% A1: Input Clause
% A2: Output Class to Compiler (lives in module HM)
% A3: Output Class to clause/2 and listing (lives in module HM)
%
% modules:
% A4: module for body of clause (this is the one used in looking up predicates)
% A5: context module (this is the current context
% A6: head module (this is the one used in compiling and accessing).
%
%
'$module_expansion'(H,H,H,_M,_HM) :- var(H), !.
'$module_expansion'((H:-B),(H:-B1),(H:-BOO),M,HM) :- !,
'$is_mt'(M, H, B, IB, MM),
'$module_u_vars'(H,UVars,M), % collect head variables in
% expanded positions
'$module_expansion'(IB,B1,BO,M,MM,HM,UVars),
('$full_clause_optimisation'(H, M, BO, BOO) ->
true
;
BO = BOO
).
% do not expand bodyless clauses.
'$module_expansion'(H,H,H,_,_).
'$trace_module'(X) :-
telling(F),
tell('P0:debug'),
write(X),nl,
tell(F), fail.
'$trace_module'(_).
'$trace_module'(X,Y) :- X==Y, !.
'$trace_module'(X,Y) :-
telling(F),
tell('~/.dbg.modules'),
write('***************'), nl,
portray_clause(X),
portray_clause(Y),
tell(F),fail.
'$trace_module'(_,_).
% expand module names in a body
% args are:
% goals to expand
% code to pass to listing
% code to pass to compiler
% current module for looking up preds M
% default module DM
% head module HM
%
% to understand the differences, you can consider:
%
% a:(d:b(X) :- g:c(X), d(X), user:hello(X)).
%
% when we process meta-predicate c, HM=d, DM=a, BM=a, M=g and we should get:
%
% d:b(X) :- g:c(g:X), a:d(X), user:hello(X).
%
% on the other hand,
%
% a:(d:b(X) :- c(X), d(X), d:e(X)).
%
% will give
%
% d:b(X) :- a:c(a:X), a:d(X), e(X).
%
%
% head variables.
% goals or arguments/sub-arguments?
% I cannot use call here because of format/3
'$module_expansion'(V,NG,NG,_,MM,_,HVars) :-
var(V), !,
( '$not_in_vars'(V,HVars)
->
NG = call(MM:V)
;
NG = call(V)
).
'$module_expansion'((A,B),(A1,B1),(AO,BO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars).
'$module_expansion'((A;B),(A1;B1),(AO;BO),M,MM,HM,HVars) :- var(A), !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars).
'$module_expansion'((A*->B;C),(A1*->B1;C1),(yap_hacks:current_choicepoint(DCP),AO,yap_hacks:cut_at(DCP),BO; CO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AOO,M,MM,HM,HVars),
'$clean_cuts'(AOO, AO),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars),
'$module_expansion'(C,C1,CO,M,MM,HM,HVars).
'$module_expansion'((A;B),(A1;B1),(AO;BO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars).
'$module_expansion'((A|B),(A1|B1),(AO|BO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars).
'$module_expansion'((A->B),(A1->B1),(AO->BO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AOO,M,MM,HM,HVars),
'$clean_cuts'(AOO, AO),
'$module_expansion'(B,B1,BO,M,MM,HM,HVars).
'$module_expansion'(\+A,\+A1,\+AO,M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars).
'$module_expansion'(not(A),not(A1),not(AO),M,MM,HM,HVars) :- !,
'$module_expansion'(A,A1,AO,M,MM,HM,HVars).
'$module_expansion'(true,true,true,_,_,_,_) :- !.
'$module_expansion'(fail,fail,fail,_,_,_,_) :- !.
'$module_expansion'(false,false,false,_,_,_,_) :- !.
% if I don't know what the module is, I cannot do anything to the goal,
% so I just put a call for later on.
'$module_expansion'(M:G,call(M:G),'$execute_wo_mod'(G,M),_,_,_,_) :- var(M), !.
'$module_expansion'(M:G,G1,GO,_,_CM,HM,HVars) :- !,
'$module_expansion'(G,G1,GO,M,M,HM,HVars).
'$module_expansion'(G, G1, GO, CurMod, MM, HM,HVars) :-
% is this imported from some other module M1?
'$imported_pred'(G, CurMod, GG, M1),
!,
'$module_expansion'(GG, G1, GO, M1, MM, HM,HVars).
'$module_expansion'(G, G1, GO, CurMod, MM, HM,HVars) :-
'$meta_expansion'(G, CurMod, MM, HM, GI, HVars), !,
'$complete_goal_expansion'(GI, CurMod, MM, HM, G1, GO, HVars).
'$module_expansion'(G, G1, GO, CurMod, MM, HM, HVars) :-
'$complete_goal_expansion'(G, CurMod, MM, HM, G1, GO, HVars).
expand_goal(G, G) :-
var(G), !.
expand_goal(M:G, M:NG) :-
'$do_expand'(G, M, NG), !.
expand_goal(G, NG) :-
'$current_module'(Mod),
'$do_expand'(G, Mod, NG), !.
expand_goal(G, G).
'$do_expand'(G, _, G) :- var(G), !.
'$do_expand'(M:G, _CurMod, M:GI) :- !,
'$do_expand'(G, M, GI).
'$do_expand'(G, CurMod, GI) :-
(
'$pred_exists'(goal_expansion(G,GI), CurMod),
call(CurMod:goal_expansion(G, GI))
->
true
;
'$pred_exists'(goal_expansion(G,GI), system),
system:goal_expansion(G, GI)
->
true
;
user:goal_expansion(G, CurMod, GI)
->
true
;
user:goal_expansion(G, GI)
), !.
'$do_expand'(G, CurMod, NG) :-
'$is_metapredicate'(G,CurMod), !,
functor(G, Name, Arity),
prolog:'$meta_predicate'(Name,CurMod,Arity,PredDef),
G =.. [Name|GArgs],
PredDef =.. [Name|GDefs],
'$expand_args'(GArgs, CurMod, GDefs, NGArgs),
NG =.. [Name|NGArgs].
'$expand_args'([], _, [], []).
'$expand_args'([A|GArgs], CurMod, [0|GDefs], [NA|NGArgs]) :-
'$do_expand'(A, CurMod, NA), !,
'$expand_args'(GArgs, CurMod, GDefs, NGArgs).
'$expand_args'([A|GArgs], CurMod, [_|GDefs], [A|NGArgs]) :-
'$expand_args'(GArgs, CurMod, GDefs, NGArgs).
% args are:
% goal to expand
% current module for looking up pred
% current module for looking up pred
% current module from top-level clause
% goal to pass to listing
% goal to pass to compiler
% head variables.
'$complete_goal_expansion'(G, CurMod, MM, HM, G1, GO, HVars) :-
% '$pred_goal_expansion_on',
'$do_expand'(G, CurMod, GI),
GI \== G, !,
'$module_expansion'(GI, G1, GO, CurMod, MM, HM, HVars).
'$complete_goal_expansion'(G, M, _CM, HM, G1, G2, _HVars) :-
'$all_system_predicate'(G,M,ORIG), !,
% make built-in processing transparent.
'$match_mod'(G, M, ORIG, HM, G1),
'$c_built_in'(G1, M, Gi),
Gi = G2.
'$complete_goal_expansion'(G, GMod, _, HM, NG, NG, _) :-
'$match_mod'(G, GMod, GMod, HM, NG).
%'$match_mod'(G, GMod, GMod, NG) :- !,
% NG = G.
'$match_mod'(G, _, SM, _, G) :- SM == prolog, nonvar(G), \+ '$is_multifile'(G,SM), !. % prolog: needs no module info.
% same module as head, and body goal (I cannot get rid of qualifier before
% meta-call.
'$match_mod'(G, HMod, _, HM, G) :- HMod == HM, !.
'$match_mod'(G, GMod, _, _, GMod:G).
% be careful here not to generate an undefined exception.
'$imported_pred'(G, ImportingMod, G0, ExportingMod) :-
'$enter_undefp',
'$undefined'(G, ImportingMod),
'$get_undefined_pred'(G, ImportingMod, G0, ExportingMod),
ExportingMod \= ImportingMod, !,
'$exit_undefp'.
'$imported_pred'(_G, _ImportingMod, _, _) :-
'$exit_undefp',
fail.
'$get_undefined_pred'(G, ImportingMod, G0, ExportingMod) :-
recorded('$import','$import'(ExportingModI,ImportingMod,G0I,G,_,_),_),
'$continue_imported'(ExportingMod, ExportingModI, G0, G0I), !.
% SWI builtin
'$get_undefined_pred'(G, _ImportingMod, G0, ExportingMod) :-
recorded('$dialect',Dialect,_),
Dialect \= yap,
functor(G, Name, Arity),
call(Dialect:index(Name,Arity,ExportingModI,_)), !,
'$continue_imported'(ExportingMod, ExportingModI, G0, G), !.
'$get_undefined_pred'(G, _ImportingMod, G0, ExportingMod) :-
yap_flag(autoload, V),
V = true,
'$autoloader_find_predicate'(G,ExportingModI), !,
'$continue_imported'(ExportingMod, ExportingModI, G0, G).
'$get_undefined_pred'(G, ImportingMod, G0, ExportingMod) :-
prolog:'$parent_module'(ImportingMod,ExportingModI),
'$continue_imported'(ExportingMod, ExportingModI, G0, G).
'$autoloader_find_predicate'(G,ExportingModI) :-
'$nb_getval'('$autoloader_set', true, fail), !,
autoloader:find_predicate(G,ExportingModI).
'$autoloader_find_predicate'(G,ExportingModI) :-
'$exit_undefp',
yap_flag(autoload, false),
load_files([library(autoloader),
autoloader:library('INDEX'),
swi:library('dialect/swi/INDEX')],
[autoload(true),if(not_loaded)]),
nb_setval('$autoloader_set', true),
yap_flag(autoload, true),
'$enter_undefp',
autoloader:find_predicate(G,ExportingModI).
'$continue_imported'(Mod,Mod,Pred,Pred) :-
\+ '$undefined'(Pred, Mod), !.
'$continue_imported'(FM,Mod,FPred,Pred) :-
recorded('$import','$import'(IM,Mod,IPred,Pred,_,_),_), !,
'$continue_imported'(FM, IM, FPred, IPred).
'$continue_imported'(FM,Mod,FPred,Pred) :-
prolog:'$parent_module'(Mod,IM),
'$continue_imported'(FM, IM, FPred, Pred).
% module_transparent declaration
%
:- dynamic('$module_transparent'/4).
'$module_transparent'((P,Ps), M) :- !,
'$module_transparent'(P, M),
'$module_transparent'(Ps, M).
'$module_transparent'(M:D, _) :- !,
'$module_transparent'(D, M).
'$module_transparent'(F/N, M) :-
'$module_transparent'(F,M,N,_), !.
'$module_transparent'(F/N, M) :-
functor(P,F,N),
asserta(prolog:'$module_transparent'(F,M,N,P)),
'$flags'(P, M, Fl, Fl),
NFlags is Fl \/ 0x200004,
'$flags'(P, M, Fl, NFlags).
'$is_mt'(M, H, B, (context_module(CM),B), CM) :-
'$module_transparent'(_, M, _, H), !.
'$is_mt'(M, _, B, B, M).
% meta_predicate declaration
% records $meta_predicate(SourceModule,Functor,Arity,Declaration)
% directive now meta_predicate Ps :- $meta_predicate(Ps).
:- dynamic('$meta_predicate'/4).
:- multifile '$meta_predicate'/4.
'$meta_predicate'(P, M) :-
var(P),
'$do_error'(instantiation_error,module(M)).
'$meta_predicate'((P,Ps), M) :- !,
'$meta_predicate'(P, M),
'$meta_predicate'(Ps, M).
'$meta_predicate'(M:D, _) :- !,
'$meta_predicate'(D, M).
'$meta_predicate'(P, M1) :-
'$install_meta_predicate'(P, M1).
'$install_meta_predicate'(P, M1) :-
functor(P,F,N),
( M1 = prolog -> M = _ ; M1 = M),
( retractall(prolog:'$meta_predicate'(F,M,N,_)), fail ; true),
asserta(prolog:'$meta_predicate'(F,M,N,P)),
'$flags'(P, M1, Fl, Fl),
NFlags is Fl \/ 0x200000,
'$flags'(P, M1, Fl, NFlags).
% return list of vars in expanded positions on the head of a clause.
%
% these variables should not be expanded by meta-calls in the body of the goal.
%
'$module_u_vars'(H,UVars,M) :-
functor(H,F,N),
'$meta_predicate'(F,M,N,D), !,
'$module_u_vars'(N,D,H,UVars).
'$module_u_vars'(_,[],_).
'$module_u_vars'(0,_,_,[]) :- !.
'$module_u_vars'(I,D,H,LF) :-
arg(I,D,X), ( X=':' ; integer(X)),
arg(I,H,A), '$uvar'(A, LF, L), !,
I1 is I-1,
'$module_u_vars'(I1,D,H,L).
'$module_u_vars'(I,D,H,L) :-
I1 is I-1,
'$module_u_vars'(I1,D,H,L).
'$uvar'(Y, [Y|L], L) :- var(Y), !.
% support all/3
'$uvar'(same( G, _), LF, L) :-
'$uvar'(G, LF, L).
'$uvar'('^'( _, G), LF, L) :-
'$uvar'(G, LF, L).
% expand arguments of a meta-predicate
% $meta_expansion(ModuleWhereDefined,CurrentModule,Goal,ExpandedGoal,MetaVariables)
'$meta_expansion0'(G,_Mod,MP,_HM, G1,_HVars) :-
var(G), !,
G1 = call(MP:G).
'$meta_expansion0'(M:G,_Mod,_MP,_HM,G1,_HVars) :-
var(M), !,
G1 = '$execute_wo_mod'(G,M).
% support for all/3
'$meta_expansion0'(same(G, P),Mod,MP,HM, same(G1, P),HVars) :- !,
'$meta_expansion0'(G,Mod,MP,HM,G1,HVars).
'$meta_expansion0'(G,Mod,MP,HM,M2:G2,HVars) :-
nonvar(G), G \= _:_,
'$module_expansion'(G,_,G1,MP,MP,HM,HVars), !,
strip_module(MP:G1, M2, G2).
'$meta_expansion0'(G,Mod,MP,HM,M1:G1,HVars) :-
strip_module(MP:G,M1,G1).
'$meta_expansion'(G,Mod,MP,HM,G1,HVars) :-
functor(G,F,N),
'$meta_predicate'(F,Mod,N,D), !, % we're in an argument
% format(user_error,'[ ~w ',[G]),
functor(G1,F,N),
'$meta_expansion_loop'(N, D, G, G1, HVars, Mod, MP, HM).
% format(user_error,' gives ~w]`n',[G1]).
% expand argument
'$meta_expansion_loop'(0,_,_,_,_,_,_,_) :- !.
'$meta_expansion_loop'(I,D,G,NG,HVars,CurMod,M,HM) :-
arg(I,D,X), (X==':' -> true ; integer(X)),
arg(I,G,A),
'$should_expand'(A,HVars),
!,
( X ==0 ->
'$meta_expansion0'(A,CurMod,M,HM,NA,HVars)
;
NA = M:A
),
arg(I,NG,NA),
I1 is I-1,
'$meta_expansion_loop'(I1, D, G, NG, HVars, CurMod, M, HM).
'$meta_expansion_loop'(I, D, G, NG, HVars, CurMod, M, HM) :-
arg(I,G,A),
arg(I,NG,A),
I1 is I-1,
'$meta_expansion_loop'(I1, D, G, NG, HVars, CurMod, M, HM).
% check if an argument should be expanded
'$should_expand'(V,HVars) :- var(V), !, '$not_in_vars'(V,HVars).
'$should_expand'(_:_,_) :- !, fail.
'$should_expand'(_,_).
'$not_in_vars'(_,[]).
'$not_in_vars'(V,[X|L]) :- X\==V, '$not_in_vars'(V,L).
current_module(Mod) :-
'$all_current_modules'(Mod),
\+ '$system_module'(Mod).
current_module(Mod,TFN) :-
'$all_current_modules'(Mod),
( recorded('$module','$module'(TFN,Mod,_Publics, _),_) -> true ; TFN = user ).
source_module(Mod) :-
'$current_module'(Mod).
% comma has its own problems.
:- '$install_meta_predicate'((0,0), prolog).
:- meta_predicate
abolish(:),
abolish(:,+),
all(?,0,-),
assert(:),
assert(:,+),
assert_static(:),
asserta(:),
asserta(:,+),
asserta_static(:),
assertz(:),
assertz(:,+),
assertz_static(:),
at_halt(0),
bagof(?,0,-),
bb_get(:,-),
bb_put(:,+),
bb_delete(:,?),
bb_update(:,?,?),
call(0),
call(1,?),
call(2,?,?),
call(3,?,?,?),
call_with_args(0),
call_with_args(1,?),
call_with_args(2,?,?),
call_with_args(3,?,?,?),
call_with_args(4,?,?,?,?),
call_with_args(5,?,?,?,?,?),
call_with_args(6,?,?,?,?,?,?),
call_with_args(7,?,?,?,?,?,?,?),
call_with_args(8,?,?,?,?,?,?,?,?),
call_with_args(9,?,?,?,?,?,?,?,?,?),
call_cleanup(0,0),
call_cleanup(0,?,0),
call_residue(0,?),
call_residue_vars(0,?),
call_shared_object_function(:,+),
catch(0,?,0),
clause(:,?),
clause(:,?,?),
compile(:),
consult(:),
current_predicate(:),
current_predicate(?,:),
db_files(:),
depth_bound_call(0,+),
discontiguous(:),
ensure_loaded(:),
exo_files(:),
findall(?,0,-),
findall(?,0,-,?),
forall(0,0),
format(+,:),
format(+,+,:),
freeze(?,0),
hide_predicate(:),
if(0,0,0),
ignore(0),
incore(0),
listing(:),
multifile(:),
nospy(:),
not(0),
notrace(0),
once(0),
phrase(2,?),
phrase(2,?,+),
predicate_property(:,?),
predicate_statistics(:,-,-,-),
on_exception(+,0,0),
qsave_program(+,:),
reconsult(:),
retract(:),
retract(:,?),
retractall(:),
reconsult(:),
setof(?,0,-),
setup_call_cleanup(0,0,0),
setup_call_catcher_cleanup(0,0,?,0),
spy(:),
stash_predicate(:),
unknown(+,:),
use_module(:),
use_module(:,?),
use_module(?,:,?),
when(+,0),
with_mutex(+,0),
with_output_to(?,0),
(0 -> 0),
(0 *-> 0),
(0 ; 0),
^(+,0),
{}(0,?,?),
','(2,2,?,?),
;(2,2,?,?),
'|'(2,2,?,?),
->(2,2,?,?),
\+(2,?,?),
\+ 0 .
%
% get rid of a module and of all predicates included in the module.
%
abolish_module(Mod) :-
recorded('$module','$module'(_,Mod,_,_),R), erase(R),
fail.
abolish_module(Mod) :-
recorded('$import','$import'(Mod,_,_,_,_,_),R), erase(R),
fail.
abolish_module(Mod) :-
'$current_predicate'(Mod,Na,Ar),
abolish(Mod:Na/Ar),
fail.
abolish_module(_).
export(Resource) :-
var(Resource),
'$do_error'(instantiation_error,export(Resource)).
export([]) :- !.
export([Resource| Resources]) :- !,
export_resource(Resource),
export(Resources).
export(Resource) :-
export_resource(Resource).
export_resource(Resource) :-
var(Resource),
'$do_error'(instantiation_error,export(Resource)).
export_resource(P) :-
P = F/N, atom(F), number(N), N >= 0, !,
'$current_module'(Mod),
( recorded('$module','$module'(File,Mod,ExportedPreds,Line),R) ->
erase(R),
recorda('$module','$module'(File,Mod,[P|ExportedPreds],Line),_)
; prolog_load_context(file, File) ->
recorda('$module','$module'(File,Mod,[P],Line),_)
; recorda('$module','$module'(user_input,Mod,[P],1),_)
).
export_resource(P0) :-
P0 = F//N, atom(F), number(N), N >= 0, !,
N1 is N+2, P = F/N1,
'$current_module'(Mod),
( recorded('$module','$module'(File,Mod,ExportedPreds,Line),R) ->
erase(R),
recorda('$module','$module'(File,Mod,[P|ExportedPreds],Line ),_)
; prolog_load_context(file, File) ->
recorda('$module','$module'(File,Mod,[P],Line),_)
; recorda('$module','$module'(user_input,Mod,[P],1),_)
).
export_resource(op(Prio,Assoc,Name)) :- !,
op(Prio,Assoc,prolog:Name).
export_resource(Resource) :-
'$do_error'(type_error(predicate_indicator,Resource),export(Resource)).
export_list(Module, List) :-
recorded('$module','$module'(_,Module,List,_),_).
'$convert_for_export'(all, Exports, _Module, _ContextModule, Tab, MyExports, _) :-
'$simple_conversion'(Exports, Tab, MyExports).
'$convert_for_export'([], Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$clean_conversion'([], Exports, Module, ContextModule, Tab, MyExports, Goal).
'$convert_for_export'([P1|Ps], Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$clean_conversion'([P1|Ps], Exports, Module, ContextModule, Tab, MyExports, Goal).
'$convert_for_export'(except(Excepts), Exports, Module, ContextModule, Tab, MyExports, Goal) :-
'$neg_conversion'(Excepts, Exports, Module, ContextModule, MyExports, Goal),
'$simple_conversion'(MyExports, Tab, _).
'$simple_conversion'([], [], []).
'$simple_conversion'([F/N|Exports], [F/N-F/N|Tab], [F/N|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F//N|Exports], [F/N2-F/N2|Tab], [F/N2|E]) :-
N2 is N+1,
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F/N as NF|Exports], [F/N-NF/N|Tab], [NF/N|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([F//N as BF|Exports], [F/N2-NF/N2|Tab], [NF/N2|E]) :-
N2 is N+1,
'$simple_conversion'(Exports, Tab, E).
'$simple_conversion'([op(Prio,Assoc,Name)|Exports], [op(Prio,Assoc,Name)|Tab], [op(Prio,Assoc,Name)|E]) :-
'$simple_conversion'(Exports, Tab, E).
'$clean_conversion'([], _, _, _, [], [], _).
'$clean_conversion'([(N1/A1 as N2)|Ps], List, Module, ContextModule, [N1/A1-N2/A1|Tab], [N2/A1|MyExports], Goal) :- !,
( lists:memberchk(N1/A1, List)
->
true
;
'$bad_export'((N1/A1 as A2), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1/A1|Ps], List, Module, ContextModule, [N1/A1-N1/A1|Tab], [N1/A1|MyExports], Goal) :- !,
(
lists:memberchk(N1/A1, List)
->
true
;
'$bad_export'(N1/A1, Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1//A1|Ps], List, Module, ContextModule, [N1/A2-N1/A2|Tab], [N1/A2|MyExports], Goal) :- !,
A2 is A1+2,
(
lists:memberchk(N1/A2, List)
->
true
;
'$bad_export'(N1//A1, Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([N1//A1 as N2|Ps], List, Module, ContextModule, [N2/A2-N1/A2|Tab], [N2/A2|MyExports], Goal) :- !,
A2 is A1+2,
(
lists:memberchk(N2/A2, List)
->
true
;
'$bad_export'((N1//A1 as A2), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([op(Prio,Assoc,Name)|Ps], List, Module, ContextModule, [op(Prio,Assoc,Name)|Tab], [op(Prio,Assoc,Name)|MyExports], Goal) :- !,
(
lists:memberchk(op(Prio,Assoc,Name), List)
->
true
;
'$bad_export'(op(Prio,Assoc,Name), Module, ContextModule)
),
'$clean_conversion'(Ps, List, Module, ContextModule, Tab, MyExports, Goal).
'$clean_conversion'([P|_], _List, _, _, _, _, Goal) :-
'$do_error'(domain_error(module_export_predicates,P), Goal).
'$bad_export'(_, _Module, _ContextModule) :- !.
'$bad_export'(Name/Arity, Module, ContextModule) :-
functor(P, Name, Arity),
predicate_property(Module:P, _), !,
print_message(warning, declaration(Name/Arity, Module, ContextModule, private)).
'$bad_export'(Name//Arity, Module, ContextModule) :-
Arity2 is Arity+2,
functor(P, Name, Arity2),
predicate_property(Module:P, _), !,
print_message(warning, declaration(Name/Arity, Module, ContextModule, private)).
'$bad_export'(Indicator, Module, ContextModule) :- !,
print_message(warning, declaration( Indicator, Module, ContextModule, undefined)).
'$neg_conversion'([], Exports, _, _, Exports, _).
'$neg_conversion'([N1/A1|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
(
lists:delete(List, N1/A1, RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(N1/A1, Module, ContextModule)
).
'$neg_conversion'([N1//A1|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
A2 is A1+2,
(
lists:delete(List, N1/A2, RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(N1//A1, Module, ContextModule)
).
'$neg_conversion'([op(Prio,Assoc,Name)|Ps], List, Module, ContextModule, MyExports, Goal) :- !,
(
lists:delete(List, op(Prio,Assoc,Name), RList)
->
'$neg_conversion'(Ps, RList, Module, ContextModule, MyExports, Goal)
;
'$bad_export'(op(Prio,Assoc,Name), Module, ContextModule)
).
'$clean_conversion'([P|_], _List, _, _, _, Goal) :-
'$do_error'(domain_error(module_export_predicates,P), Goal).
'$add_to_imports'([], _, _).
% no need to import from the actual module
'$add_to_imports'([T|Tab], Module, ContextModule) :-
'$do_import'(T, Module, ContextModule),
'$add_to_imports'(Tab, Module, ContextModule).
'$do_import'(op(Prio,Assoc,Name), _Mod, ContextMod) :-
op(Prio,Assoc,ContextMod:Name).
'$do_import'(N0/K0-N0/K0, Mod, Mod) :- !.
'$do_import'(_N/K-N1/K, _Mod, ContextMod) :-
recorded('$module','$module'(_F, ContextMod, MyExports,_),_),
once(lists:member(N1/K, MyExports)),
functor(S, N1, K),
% reexport predicates if they are undefined in the current module.
\+ '$undefined'(S,ContextMod), !.
'$do_import'( N/K-N1/K, Mod, ContextMod) :-
functor(G,N,K),
'$follow_import_chain'(Mod,G,M0,G0),
G0=..[N0|Args],
G1=..[N1|Args],
( '$check_import'(M0,ContextMod,N1,K) ->
( ContextMod = user ->
( recordzifnot('$import','$import'(M0,user,G0,G1,N1,K),_) -> true ; true)
;
( recordaifnot('$import','$import'(M0,ContextMod,G0,G1,N1,K),_) -> true ; true )
)
;
true
).
'$follow_import_chain'(M,G,M0,G0) :-
recorded('$import','$import'(M1,M,G1,G,_,_),_), M \= M1, !,
'$follow_import_chain'(M1,G1,M0,G0).
'$follow_import_chain'(M,G,M,G).
% trying to import Mod:N/K into ContextM
'$check_import'(Mod, ContextM, N, K) :-
recorded('$import','$import'(MI, ContextM, _, _, N,K),_R),
% dereference MI to M1, in order to find who
% is actually generating
( '$module_produced by'(M1, MI, N, K) -> true ; MI = M1 ),
( '$module_produced by'(M2, Mod, N, K) -> true ; M = M2 ),
M2 \= M1, !,
b_getval('$lf_status', TOpts),
'$lf_opt'(redefine_module, TOpts, Action),
'$redefine_action'(Action, M1, M2, M, N/K).
'$check_import'(_,_,_,_).
'$redefine_action'(ask, M1, M2, M, N/K) :-
stream_property(user_input,tty(true)), !,
format(user_error,'NAME CLASH: ~w was already imported to module ~w;~n',[M1:N/K,M2]),
format(user_error,' Do you want to import it from ~w ? [y, n, e or h] ',M),
'$mod_scan'(C),
( C =:= 0'e -> halt(1) ;
C =:= 0'y ).
'$redefine_action'(true, M1, _, _, _) :- !,
recorded('$module','$module'(F, M1, _MyExports,_Line),_),
unload_file(F).
'$redefine_action'(false, M1,M2, M, N/K) :-
'$do_error'(permission_error(import,M1:N/K,redefined,M2),module(M)).
% I assume the clause has been processed, so the
% var case is long gone! Yes :)
'$clean_cuts'(G,(yap_hacks:current_choicepoint(DCP),NG)) :-
'$conj_has_cuts'(G,DCP,NG,OK), OK == ok, !.
'$clean_cuts'(G,G).
'$conj_has_cuts'(V,_,V, _) :- var(V), !.
'$conj_has_cuts'(!,DCP,'$$cut_by'(DCP), ok) :- !.
'$conj_has_cuts'((G1,G2),DCP,(NG1,NG2), OK) :- !,
'$conj_has_cuts'(G1, DCP, NG1, OK),
'$conj_has_cuts'(G2, DCP, NG2, OK).
'$conj_has_cuts'((G1;G2),DCP,(NG1;NG2), OK) :- !,
'$conj_has_cuts'(G1, DCP, NG1, OK),
'$conj_has_cuts'(G2, DCP, NG2, OK).
'$conj_has_cuts'((G1->G2),DCP,(G1;NG2), OK) :- !,
% G1: the system must have done it already
'$conj_has_cuts'(G2, DCP, NG2, OK).
'$conj_has_cuts'((G1*->G2),DCP,(G1;NG2), OK) :- !,
% G1: the system must have done it already
'$conj_has_cuts'(G2, DCP, NG2, OK).
'$conj_has_cuts'(if(G1,G2,G3),DCP,if(G1,NG2,NG3), OK) :- !,
% G1: the system must have done it already
'$conj_has_cuts'(G2, DCP, NG2, OK),
'$conj_has_cuts'(G3, DCP, NG3, OK).
'$conj_has_cuts'(G,_,G, _).
set_base_module(ExportingModule) :-
var(ExportingModule),
'$do_error'(instantiation_error,set_base_module(ExportingModule)).
set_base_module(ExportingModule) :-
atom(ExportingModule), !,
'$current_module'(Mod),
retractall(prolg:'$parent_module'(Mod,_)),
asserta(prolog:'$parent_module'(Mod,ExportingModule)).
set_base_module(ExportingModule) :-
'$do_error'(type_error(atom,ExportingModule),set_base_module(ExportingModule)).
import_module(Mod, ImportModule) :-
var(Mod),
'$do_error'(instantiation_error,import_module(Mod, ImportModule)).
import_module(Mod, ImportModule) :-
atom(Mod), !,
prolog:'$parent_module'(Mod,ImportModule).
import_module(Mod, EM) :-
'$do_error'(type_error(atom,Mod),import_module(Mod, EM)).
add_import_module(Mod, ImportModule, Pos) :-
var(Mod),
'$do_error'(instantiation_error,add_import_module(Mod, ImportModule, Pos)).
add_import_module(Mod, ImportModule, Pos) :-
var(Pos),
'$do_error'(instantiation_error,add_import_module(Mod, ImportModule, Pos)).
add_import_module(Mod, ImportModule, start) :-
atom(Mod), !,
retractall(prolog:'$parent_module'(Mod,ImportModule)),
asserta(prolog:'$parent_module'(Mod,ImportModule)).
add_import_module(Mod, ImportModule, end) :-
atom(Mod), !,
retractall(prolog:'$parent_module'(Mod,ImportModule)),
assertz(prolog:'$parent_module'(Mod,ImportModule)).
add_import_module(Mod, ImportModule, Pos) :-
\+ atom(Mod), !,
'$do_error'(type_error(atom,Mod),add_import_module(Mod, ImportModule, Pos)).
add_import_module(Mod, ImportModule, Pos) :-
'$do_error'(domain_error(start_end,Pos),add_import_module(Mod, ImportModule, Pos)).
delete_import_module(Mod, ImportModule) :-
var(Mod),
'$do_error'(instantiation_error,delete_import_module(Mod, ImportModule)).
delete_import_module(Mod, ImportModule) :-
var(ImportModule),
'$do_error'(instantiation_error,delete_import_module(Mod, ImportModule)).
delete_import_module(Mod, ImportModule) :-
atom(Mod),
atom(ImportModule), !,
retractall(prolog:'$parent_module'(Mod,ImportModule)).
delete_import_module(Mod, ImportModule) :-
\+ atom(Mod), !,
'$do_error'(type_error(atom,Mod),delete_import_module(Mod, ImportModule)).
delete_import_module(Mod, ImportModule) :-
'$do_error'(type_error(atom,ImportModule),delete_import_module(Mod, ImportModule)).
'$set_source_module'(Source0, SourceF) :-
prolog_load_context(module, Source0), !,
module(SourceF).
'$set_source_module'(Source0, SourceF) :-
current_module(Source0, SourceF).
/** '$declare_module'(+Module, +Super, +File, +Line, +Redefine) is det.
Start a new (source-)module
@param Module is the name of the module to declare
@param File is the canonical name of the file from which the module
is loaded
@param Line is the line-number of the :- module/2 directive.
@param Redefine If =true=, allow associating the module to a new file
*/
'$declare_module'(Name, _Test, Context, _File, _Line) :-
add_import_module(Name, Context, start).
module_property(Mod, line_count(L)) :-
recorded('$module','$module'(_F,Mod,_,L),_).
module_property(Mod, file(F)) :-
recorded('$module','$module'(F,Mod,_,_),_).
module_property(Mod, exports(Es)) :-
recorded('$module','$module'(_,Mod,Es,_),_).
ls_imports :-
recorded('$import','$import'(M0,M,G0,G,_N,_K),_R),
numbervars(G0+G, 0, _),
format('~a:~w <- ~a:~w~n', [M, G, M0, G0]),
fail.
ls_imports.