482 lines
12 KiB
Prolog
482 lines
12 KiB
Prolog
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-2014 *
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* *
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**************************************************************************
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* *
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* File: boot.yap *
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* Last rev: 8/2/88 *
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* mods: *
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* commen ts: boot file for Prolog *
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* *
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*************************************************************************/
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/**
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@file boot.yap
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@brief YAP bootstrap
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@addtogroup TopLevel Top-Level and Boot Predicates
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@ingroup builtins
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@{
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*/
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system_module(_Mod, _SysExps, _Decls).
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% new_system_module(Mod).
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use_system_module(_Module, _SysExps).
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private(_).
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%
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% boootstrap predicates.
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%
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:- system_module( '$_boot', [
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bootstrap/1,
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call/1,
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catch/3,
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catch_ball/2,
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expand_term/2,
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import_system_module/2,
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incore/1,
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(not)/1,
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repeat/0,
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throw/1,
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true/0], ['$$compile'/4,
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'$call'/4,
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'$catch'/3,
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'$check_callable'/2,
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'$check_head_and_body'/4,
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'$check_if_reconsulted'/2,
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'$clear_reconsulting'/0,
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'$command'/4,
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'$cut_by'/1,
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'$disable_debugging'/0,
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'$do_live'/0,
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'$'/0,
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'$find_goal_definition'/4,
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'$head_and_body'/3,
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'$inform_as_reconsulted'/2,
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'$init_system'/0,
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'$init_win_graphics'/0,
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'$loop'/2,
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'$meta_call'/2,
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'$prompt_alternatives_on'/1,
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'$run_at_thread_start'/0,
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'$system_catch'/4,
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'$undefp'/1,
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'$version'/0]).
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:- use_system_module( '$_absf', ['$system_library_directories'/2]).
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:- use_system_module( '$_checker', ['$check_term'/5,
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'$sv_warning'/2]).
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:- use_system_module( '$_consult', ['$csult'/2]).
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:- use_system_module( '$_control', ['$run_atom_goal'/1]).
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:- use_system_module( '$_directives', ['$all_directives'/1,
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'$exec_directives'/5]).
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:- use_system_module( '$_errors', ['$do_error'/2]).
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:- use_system_module( '$_grammar', ['$translate_rule'/2]).
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:- use_system_module( '$_modules', ['$get_undefined_pred'/4,
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'$meta_expansion'/6,
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'$module_expansion'/6]).
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:- use_system_module( '$_preddecls', ['$dynamic'/2]).
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:- use_system_module( '$_preds', ['$assert_static'/5,
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'$assertz_dynamic'/4,
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'$init_preds'/0,
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'$unknown_error'/1,
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'$unknown_warning'/1]).
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:- use_system_module( '$_qly', ['$init_state'/0]).
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:- use_system_module( '$_strict_iso', ['$check_iso_strict_clause'/1,
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'$iso_check_goal'/2]).
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% be careful here not to generate an undefined exception..
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print_message(L,E) :-
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'$number_of_clauses'(print_message(L,E), prolog_complete, 1),
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!,
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(L = informational
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->
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true
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;
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format( user_error, '~w in bootstrap: got ~w~n',[L,E])
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).
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'$undefp0'([M|G], _Action) :-
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stream_property( loop_stream, [file_name(F), line_number(L)]),
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format(user_error,'~a:~d error undefined:',[F,L]),
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fail
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;
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format(user_error,' call to ~w~n',[M:G]),
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fail.
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:- '$undefp_handler'('$undefp0'(_,_),prolog).
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/**
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* @pred $system_meta_predicates'( +L )
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*
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* @param L declare a set of system meta-predicates
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*
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* @return system predicates
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*/
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'$system_meta_predicates'([]).
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'$system_meta_predicates'([P|L]) :-
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functor(P,N,A),
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'$new_meta_pred'(P, prolog),
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G = ('$meta_predicate'(N,_M2,A,P) :- true),
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'$compile'(G, assertz, G, prolog, _R),
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'$system_meta_predicates'(L).
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:- '$mk_dynamic'( '$meta_predicate'(_N,_M,_A,_P), prolog).
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:- '$new_multifile'( '$meta_predicate'(_N,_M,_A,_P), prolog).
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:- '$new_multifile'('$full_clause_optimisation'(_H, _M, _B0, _BF), prolog).
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:- '$new_multifile'('$exec_directive'(_,_,_,_,_), prolog).
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:- system_module( '$_init', [!/0,
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':-'/1,
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'?-'/1,
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[]/0,
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extensions_to_present_answer/1,
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fail/0,
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false/0,
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goal_expansion/2,
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goal_expansion/3,
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otherwise/0,
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term_expansion/2,
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version/2,
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'$do_log_upd_clause'/6,
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'$do_log_upd_clause0'/6,
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'$do_log_upd_clause_erase'/6,
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'$do_static_clause'/5], [
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'$system_module'/1]).
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:- use_system_module( '$_boot', ['$cut_by'/1]).
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%:- start_low_level_trace.
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% This is the YAP init file
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% should be consulted first step after booting
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:- yap_flag(prolog:unknown, error).
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:- c_compile('top.yap').
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% These are pseudo declarations
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% so that the user will get a redefining system predicate
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% just create a choice-point
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% the 6th argument marks the time-stamp.
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'$do_log_upd_clause'(_,_,_,_,_,_).
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'$do_log_upd_clause'(A,B,C,D,E,_) :-
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'$continue_log_update_clause'(A,B,C,D,E).
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'$do_log_upd_clause'(_,_,_,_,_,_).
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'$do_log_upd_clause_erase'(_,_,_,_,_,_).
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'$do_log_upd_clause_erase'(A,B,C,D,E,_) :-
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'$continue_log_update_clause_erase'(A,B,C,D,E).
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'$do_log_upd_clause_erase'(_,_,_,_,_,_).
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'$do_log_upd_clause0'(_,_,_,_,_,_).
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'$do_log_upd_clause0'(A,B,C,D,_,_) :-
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'$continue_log_update_clause'(A,B,C,D).
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'$do_log_upd_clause0'(_,_,_,_,_,_).
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'$do_static_clause'(_,_,_,_,_).
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'$do_static_clause'(A,B,C,D,E) :-
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'$continue_static_clause'(A,B,C,D,E).
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'$do_static_clause'(_,_,_,_,_).
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:- c_compile('directives.yap').
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:- c_compile('init.yap').
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'$command'(C,VL,Pos,Con) :-
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current_prolog_flag(strict_iso, true), !, /* strict_iso on */
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'$yap_strip_module'(C, EM, EG),
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'$execute_command'(EG,EM,VL,Pos,Con,_Source).
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'$command'(C,VL,Pos,Con) :-
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( (Con = top ; var(C) ; C = [_|_]) ->
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'$yap_strip_module'(C, EM, EG),
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'$execute_command'(EG,EM,VL,Pos,Con,C) ;
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% do term expansion
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'$expand_term'(C, Con, EC),
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'$yap_strip_module'(EC, EM2, EG2),
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% execute a list of commands
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'$execute_commands'(EG2,EM2,VL,Pos,Con,_Source)
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),
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% succeed only if the *original* was at end of file.
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C == end_of_file.
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:- c_compile('arith.yap').
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%:- stop_low_level_trace.
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:- compile_expressions.
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:- c_compile('imports.yap').
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:- c_compile('bootutils.yap').
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:- c_compile('bootlists.yap').
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:- c_compile('consult.yap').
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:- c_compile('preddecls.yap').
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:- c_compile('meta.yap').
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:- c_compile('metadecls.yap').
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:- c_compile('preddyns.yap').
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:- c_compile('builtins.yap').
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:- c_compile('newmod.yap').
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:- c_compile('atoms.yap').
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:- c_compile('os.yap').
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:- c_compile('errors.yap').
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%%
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% @pred initialize_prolog
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%
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% User-interface to Prolog bootstrap routine.
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%
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initialize_prolog :-
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'$init_prolog'.
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:- set_prolog_flag(verbose, silent).
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%:- set_prolog_flag(verbose_file_search, true ).
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%:- yap_flag(write_strings,on).
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:- c_compile( 'preds.yap' ).
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:- c_compile( 'modules.yap' ).
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:- c_compile( 'grammar.yap' ).
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:- c_compile( 'protect.yap' ).
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:- ['absf.yap'].
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:- use_module('error.yap').
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:- [
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'utils.yap',
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'control.yap',
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'flags.yap'
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].
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:- [
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% lists is often used.
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'../os/yio.yap',
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'debug.yap',
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'checker.yap',
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'depth_bound.yap',
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'ground.yap',
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'listing.yap',
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'arithpreds.yap',
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% modules must be after preds, otherwise we will have trouble
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% with meta-predicate expansion being invoked
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% must follow grammar
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'eval.yap',
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'signals.yap',
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'profile.yap',
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'callcount.yap',
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'load_foreign.yap',
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% 'save.yap',
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'setof.yap',
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'sort.yap',
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'statistics.yap',
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'strict_iso.yap',
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'tabling.yap',
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'threads.yap',
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'eam.yap',
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'yapor.yap',
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'qly.yap',
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'spy.yap',
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'udi.yap'].
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%:- start_low_level_trace.
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:- meta_predicate(log_event(+,:)).
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:- dynamic prolog:'$user_defined_flag'/4.
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:- multifile prolog:debug_action_hook/1.
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:- multifile prolog:'$system_predicate'/2.
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:- '$opdec'(1150,fx,(mode),prolog).
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:- dynamic 'extensions_to_present_answer'/1.
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:- ['arrays.yap'].
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:- multifile user:portray_message/2.
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:- dynamic user:portray_message/2.
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/** @pred prolog:goal_expansion( :G,+ M,- NG)
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@pred user:goalexpansion(+ G,+ M,- NG)
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The goal_expansion/3 hook is an user-defined
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procedure that is called after term expansion when compiling or
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asserting goals for each sub-goal in a clause. The first argument is
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bound to the goal and the second to the module under which the goal
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_G_ will execute. If goal_expansion/3 succeeds the new
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sub-goal _NG_ will replace _G_ and will be processed in the same
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way. If goal_expansion/3 fails the system will use the default
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expandion mechanism.
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This hook is called:
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- at compilation time;
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- when running a query in the top-level
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Older versions of YAP would call this procedure at every meta-call.
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*/
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:- multifile user:goal_expansion/3.
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:- dynamic user:goal_expansion/3.
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:- multifile user:goal_expansion/2.
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:- dynamic user:goal_expansion/2.
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:- multifile system:goal_expansion/2.
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:- dynamic system:goal_expansion/2.
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:- multifile goal_expansion/2.
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:- dynamic goal_expansion/2.
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:- use_module('messages.yap').
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:- ['undefined.yap'].
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:- use_module('hacks.yap').
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:- use_module('attributes.yap').
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:- use_module('corout.yap').
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:- use_module('dialect.yap').
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:- use_module('dbload.yap').
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:- use_module('ypp.yap').
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:- use_module('../os/chartypes.yap').
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:- ensure_loaded('../os/edio.yap').
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yap_hacks:cut_by(CP) :- '$$cut_by'(CP).
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:- '$change_type_of_char'(36,7). % Make $ a symbol character
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:- set_prolog_flag(generate_debug_info,true).
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%
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% cleanup ensure loaded and recover some data-base space.
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%
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%:- ( recorded('$lf_loaded',_,R), erase(R), fail ; true ).
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%:- ( recorded('$module',_,R), erase(R), fail ; true ).
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:- set_value('$user_module',user), '$protect'.
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:- style_check([+discontiguous,+multiple,+single_var]).
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%
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% moved this to init_gc in gc.c to separate the alpha
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%
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% :- yap_flag(gc,on).
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% :- yap_flag(gc_trace,verbose).
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:- multifile
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prolog:comment_hook/3.
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:- source.
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:- module(user).
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/** @pred term_expansion( _T_,- _X_)
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user:term_expansion( _T_,- _X_)
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This user-defined predicate is called by `expand_term/3` to
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preprocess all terms read when consulting a file. If it succeeds:
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+
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If _X_ is of the form `:- G` or `?- G`, it is processed as
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a directive.
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+
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If _X_ is of the form `$source_location`( _File_, _Line_): _Clause_` it is processed as if from `File` and line `Line`.
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+
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If _X_ is a list, all terms of the list are asserted or processed
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as directives.
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+ The term _X_ is asserted instead of _T_.
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*/
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:- multifile term_expansion/2.
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:- dynamic term_expansion/2.
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:- multifile system:term_expansion/2.
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:- dynamic system:term_expansion/2.
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:- multifile system:swi_predicate_table/4.
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/** @pred user:message_hook(+ _Term_, + _Kind_, + _Lines_)
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Hook predicate that may be define in the module `user` to intercept
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messages from print_message/2. _Term_ and _Kind_ are the
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same as passed to print_message/2. _Lines_ is a list of
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format statements as described with print_message_lines/3.
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This predicate should be defined dynamic and multifile to allow other
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modules defining clauses for it too.
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*/
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:- multifile user:message_hook/3.
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:- dynamic user:message_hook/3.
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/** @pred exception(+ _Exception_, + _Context_, - _Action_)
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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.
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If this hook preodicate 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.
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+ `undefined_predicate`
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_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`.
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+ `undefined_global_variable`
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_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.
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*/
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:- multifile user:exception/3.
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:- dynamic user:exception/3.
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:- ensure_loaded('../pl/pathconf.yap').
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:- yap_flag(user:unknown,error).
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%% @}
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