349 lines
8.0 KiB
Prolog
349 lines
8.0 KiB
Prolog
/*************************************************************************
|
|
* *
|
|
* YAP Prolog *
|
|
* *
|
|
* Yap Prolog was developed at NCCUP - Universidade do Porto *
|
|
* *
|
|
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
|
|
* *
|
|
**************************************************************************
|
|
* *
|
|
* File: init.yap *
|
|
* Last rev: *
|
|
* mods: *
|
|
* comments: initializing the full prolog system *
|
|
* *
|
|
*************************************************************************/
|
|
%% @defgroup builtins YAP Built-Ins
|
|
|
|
/*
|
|
|
|
@addtogroup YAPControl
|
|
|
|
@{
|
|
*/
|
|
|
|
:- system_module( '$_init', [!/0,
|
|
(:-)/1,
|
|
(?-)/1,
|
|
[]/0,
|
|
extensions_to_present_answer/1,
|
|
fail/0,
|
|
false/0,
|
|
goal_expansion/2,
|
|
goal_expansion/3,
|
|
otherwise/0,
|
|
prolog_booting/0,
|
|
term_expansion/2,
|
|
version/2,
|
|
'$do_log_upd_clause'/6,
|
|
'$do_log_upd_clause0'/6,
|
|
'$do_log_upd_clause_erase'/6,
|
|
'$do_static_clause'/5], [
|
|
'$system_module'/1]).
|
|
|
|
:- use_system_module( '$_boot', ['$cut_by'/1]).
|
|
|
|
'prolog_booting'.
|
|
|
|
% This is yap's init file
|
|
% should be consulted first step after booting
|
|
|
|
% These are pseudo declarations
|
|
% so that the user will get a redefining system predicate
|
|
/** @pred fail is iso
|
|
|
|
|
|
Always fails.
|
|
|
|
|
|
*/
|
|
fail :- fail.
|
|
|
|
/** @pred false is iso
|
|
|
|
|
|
The same as fail.
|
|
|
|
|
|
*/
|
|
false :- fail.
|
|
|
|
otherwise.
|
|
|
|
!.
|
|
|
|
(:- G) :- '$execute'(G), !.
|
|
|
|
(?- G) :- '$execute'(G).
|
|
|
|
'$$!'(CP) :- '$cut_by'(CP).
|
|
|
|
[] :- true.
|
|
|
|
:- set_value('$doindex',true).
|
|
|
|
% just create a choice-point
|
|
% the 6th argument marks the time-stamp.
|
|
'$do_log_upd_clause'(_,_,_,_,_,_).
|
|
'$do_log_upd_clause'(A,B,C,D,E,_) :-
|
|
'$continue_log_update_clause'(A,B,C,D,E).
|
|
'$do_log_upd_clause'(_,_,_,_,_,_).
|
|
|
|
|
|
'$do_log_upd_clause_erase'(_,_,_,_,_,_).
|
|
'$do_log_upd_clause_erase'(A,B,C,D,E,_) :-
|
|
'$continue_log_update_clause_erase'(A,B,C,D,E).
|
|
'$do_log_upd_clause_erase'(_,_,_,_,_,_).
|
|
|
|
'$do_log_upd_clause0'(_,_,_,_,_,_).
|
|
'$do_log_upd_clause0'(A,B,C,D,_,_) :-
|
|
'$continue_log_update_clause'(A,B,C,D).
|
|
'$do_log_upd_clause0'(_,_,_,_,_,_).
|
|
|
|
|
|
'$do_static_clause'(_,_,_,_,_).
|
|
'$do_static_clause'(A,B,C,D,E) :-
|
|
'$continue_static_clause'(A,B,C,D,E).
|
|
'$do_static_clause'(_,_,_,_,_).
|
|
|
|
:- '$handle_throw'(_,_,_), !.
|
|
|
|
:- bootstrap('errors.yap').
|
|
:- bootstrap('lists.yap').
|
|
:- bootstrap('consult.yap').
|
|
:- bootstrap('preddecls.yap').
|
|
|
|
|
|
:- bootstrap('atoms.yap').
|
|
:- bootstrap('os.yap').
|
|
:- bootstrap('absf.yap').
|
|
|
|
:-'$swi_set_prolog_flag'(verbose, normal).
|
|
|
|
:- [ 'directives.yap',
|
|
'utils.yap',
|
|
'control.yap',
|
|
'arith.yap',
|
|
'flags.yap'
|
|
].
|
|
|
|
:- [ 'preds.yap',
|
|
'modules.yap'
|
|
].
|
|
|
|
:- compile_expressions.
|
|
|
|
:- [
|
|
% lists is often used.
|
|
'yio.yap',
|
|
'debug.yap',
|
|
'checker.yap',
|
|
'depth_bound.yap',
|
|
'grammar.yap',
|
|
'ground.yap',
|
|
'listing.yap',
|
|
'arithpreds.yap',
|
|
% modules must be after preds, otherwise we will have trouble
|
|
% with meta-predicate expansion being invoked
|
|
% must follow grammar
|
|
'eval.yap',
|
|
'signals.yap',
|
|
'profile.yap',
|
|
'callcount.yap',
|
|
'load_foreign.yap',
|
|
% 'save.yap',
|
|
'setof.yap',
|
|
'sort.yap',
|
|
'statistics.yap',
|
|
'strict_iso.yap',
|
|
'tabling.yap',
|
|
'threads.yap',
|
|
'eam.yap',
|
|
'chtypes.yap',
|
|
'yapor.yap',
|
|
'qly.yap',
|
|
'udi.yap'].
|
|
|
|
:- meta_predicate(log_event(+,:)).
|
|
|
|
:- dynamic prolog:'$user_defined_flag'/4.
|
|
|
|
:- dynamic prolog:'$parent_module'/2.
|
|
|
|
:- multifile prolog:debug_action_hook/1.
|
|
|
|
:- ['protect.yap'].
|
|
|
|
version(yap,[6,3]).
|
|
|
|
:- op(1150,fx,(mode)).
|
|
|
|
:- dynamic 'extensions_to_present_answer'/1.
|
|
|
|
:- ['arrays.yap'].
|
|
|
|
:- ['undefined.yap'].
|
|
|
|
:- use_module('messages.yap').
|
|
:- use_module('hacks.yap').
|
|
:- use_module('attributes.yap').
|
|
:- use_module('corout.yap').
|
|
:- use_module('dialect.yap').
|
|
:- use_module('history.pl').
|
|
:- use_module('dbload.yap').
|
|
:- use_module('swi.yap').
|
|
:- use_module('../swi/library/predopts.pl').
|
|
:- use_module('../swi/library/menu.pl').
|
|
:- use_module('../library/ypp.yap').
|
|
|
|
|
|
|
|
yap_hacks:cut_by(CP) :- '$$cut_by'(CP).
|
|
|
|
:- '$change_type_of_char'(36,7). % Make $ a symbol character
|
|
|
|
:- '$swi_set_prolog_flag'(generate_debug_info,true).
|
|
|
|
|
|
:- recorda('$dialect',yap,_).
|
|
|
|
%
|
|
% cleanup ensure loaded and recover some data-base space.
|
|
%
|
|
:- ( recorded('$lf_loaded',_,R), erase(R), fail ; true ).
|
|
:- ( recorded('$module',_,R), erase(R), fail ; true ).
|
|
|
|
:- set_value('$user_module',user), '$protect'.
|
|
|
|
:- style_check([-discontiguous,-multiple,-single_var]).
|
|
|
|
%
|
|
% moved this to init_gc in gc.c to separate the alpha
|
|
%
|
|
% :- yap_flag(gc,on).
|
|
|
|
% :- yap_flag(gc_trace,verbose).
|
|
|
|
:- multifile
|
|
prolog:comment_hook/3.
|
|
|
|
:- source.
|
|
|
|
:- module(user).
|
|
|
|
/** @pred _CurrentModule_:goal_expansion(+ _G_,+ _M_,- _NG_), user:goal_expansion(+ _G_,+ _M_,- _NG_)
|
|
|
|
|
|
YAP now supports goal_expansion/3. This is an user-defined
|
|
procedure that is called after term expansion when compiling or
|
|
asserting goals for each sub-goal in a clause. The first argument is
|
|
bound to the goal and the second to the module under which the goal
|
|
_G_ will execute. If goal_expansion/3 succeeds the new
|
|
sub-goal _NG_ will replace _G_ and will be processed in the same
|
|
way. If goal_expansion/3 fails the system will use the default
|
|
rules.
|
|
|
|
|
|
*/
|
|
:- multifile goal_expansion/3.
|
|
|
|
:- dynamic goal_expansion/3.
|
|
|
|
:- multifile goal_expansion/2.
|
|
|
|
:- dynamic goal_expansion/2.
|
|
|
|
:- multifile system:goal_expansion/2.
|
|
|
|
:- dynamic system:goal_expansion/2.
|
|
|
|
:- multifile goal_expansion/2.
|
|
|
|
:- dynamic goal_expansion/2.
|
|
|
|
|
|
/** @pred _CurrentModule_:term_expansion( _T_,- _X_), user:term_expansion( _T_,- _X_)
|
|
|
|
|
|
This user-defined predicate is called by `expand_term/3` to
|
|
preprocess all terms read when consulting a file. If it succeeds:
|
|
|
|
+
|
|
If _X_ is of the form `:- G` or `?- G`, it is processed as
|
|
a directive.
|
|
+
|
|
If _X_ is of the form `$source_location`( _File_, _Line_): _Clause_` it is processed as if from `File` and line `Line`.
|
|
|
|
+
|
|
If _X_ is a list, all terms of the list are asserted or processed
|
|
as directives.
|
|
+ The term _X_ is asserted instead of _T_.
|
|
|
|
|
|
|
|
*/
|
|
|
|
:- multifile term_expansion/2.
|
|
|
|
:- dynamic term_expansion/2.
|
|
|
|
:- multifile system:term_expansion/2.
|
|
|
|
:- dynamic system:term_expansion/2.
|
|
|
|
:- multifile swi:swi_predicate_table/4.
|
|
|
|
/** @pred user:message_hook(+ _Term_, + _Kind_, + _Lines_)
|
|
|
|
|
|
Hook predicate that may be define in the module `user` to intercept
|
|
messages from print_message/2. _Term_ and _Kind_ are the
|
|
same as passed to print_message/2. _Lines_ is a list of
|
|
format statements as described with print_message_lines/3.
|
|
|
|
This predicate should be defined dynamic and multifile to allow other
|
|
modules defining clauses for it too.
|
|
|
|
|
|
*/
|
|
:- multifile user:message_hook/3.
|
|
|
|
:- dynamic user:message_hook/3.
|
|
|
|
:- multifile user:portray_message/2.
|
|
|
|
:- dynamic user:portray_message/2.
|
|
|
|
/** @pred exception(+ _Exception_, + _Context_, - _Action_)
|
|
|
|
|
|
Dynamic predicate, normally not defined. Called by the Prolog system on run-time exceptions that can be repaired `just-in-time`. The values for _Exception_ are described below. See also catch/3 and throw/1.
|
|
If this hook predicate succeeds it must instantiate the _Action_ argument to the atom `fail` to make the operation fail silently, `retry` to tell Prolog to retry the operation or `error` to make the system generate an exception. The action `retry` only makes sense if this hook modified the environment such that the operation can now succeed without error.
|
|
|
|
+ `undefined_predicate`
|
|
_Context_ is instantiated to a predicate-indicator ( _Module:Name/Arity_). If the predicate fails Prolog will generate an existence_error exception. The hook is intended to implement alternatives to the SWI built-in autoloader, such as autoloading code from a database. Do not use this hook to suppress existence errors on predicates. See also `unknown`.
|
|
+ `undefined_global_variable`
|
|
_Context_ is instantiated to the name of the missing global variable. The hook must call nb_setval/2 or b_setval/2 before returning with the action retry.
|
|
|
|
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
:- multifile user:exception/3.
|
|
|
|
:- dynamic user:exception/3.
|
|
|
|
:- yap_flag(unknown,error).
|
|
|
|
:- stream_property(user_input, tty(true)) -> set_prolog_flag(readline, true) ; true.
|
|
|
|
|
|
|
|
/**
|
|
@}
|
|
*/
|