a396b732f7
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1339 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
627 lines
19 KiB
Prolog
627 lines
19 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 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: modules.pl *
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* Last rev: *
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* mods: *
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* comments: module support *
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* *
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*************************************************************************/
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% module handling
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use_module(M) :-
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'$use_module'(M).
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'$use_module'(V) :- var(V), !,
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'$do_error'(instantiation_error,use_module(V)).
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'$use_module'([]) :- !.
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'$use_module'([A|B]) :- !,
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'$use_module'(A),
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'$use_module'(B).
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'$use_module'(M:F) :- atom(M), !,
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'$current_module'(M0),
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'$change_module'(M),
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'$use_module'(F),
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'$change_module'(M0).
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'$use_module'(File) :-
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'$find_in_path'(File,X,use_module(File)), !,
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( recorded('$module','$module'(_,X,Publics),_) ->
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'$use_module'(File,Publics)
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;
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'$ensure_loaded'(File)
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).
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'$use_module'(File) :-
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'$do_error'(permission_error(input,stream,File),use_module(File)).
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use_module(File,I) :-
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'$use_module'(File, I).
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'$use_module'(File,Imports) :- var(File), !,
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'$do_error'(instantiation_error,use_module(File,Imports)).
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'$use_module'(File,Imports) :- var(Imports), !,
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'$do_error'(instantiation_error,use_module(File,Imports)).
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'$use_module'(M:F, Imports) :- atom(M), !,
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'$current_module'(M0),
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'$change_module'(M),
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'$use_module'(F, Imports),
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'$change_module'(M0).
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'$use_module'(File,Imports) :-
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'$current_module'(M),
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'$find_in_path'(File,X,use_module(File,Imports)), !,
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'$open'(X,'$csult',Stream,0), !,
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( '$loaded'(Stream,M,TrueFileName) -> true
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;
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% the following avoids import of all public predicates
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'$consulting_file_name'(Stream,TrueFileName),
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recorda('$importing','$importing'(TrueFileName),R),
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'$reconsult'(File,M,Stream)
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),
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'$close'(Stream),
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( var(R) -> true; erased(R) -> true; erase(R)),
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( recorded('$module','$module'(TrueFileName,Mod,Publics),_) ->
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'$use_preds'(Imports,Publics,Mod,M)
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;
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true
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).
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'$use_module'(File,Imports) :-
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'$do_error'(permission_error(input,stream,File),use_module(File,Imports)).
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use_module(Mod,F,I) :-
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'$use_module'(Mod,F,I).
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'$use_module'(Module,V,Imports) :- var(V), !,
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'$use_module'(Module,Module,Imports).
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'$use_module'(Module,M:File,Imports) :-
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atom(M), !,
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'$current_module'(M0),
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'$change_module'(M),
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'$use_module'(Module,File,Imports),
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'$change_module'(M0).
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'$use_module'(Module,File,Imports) :-
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'$find_in_path'(File,X,use_module(Module,File,Imports)),
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'$open'(X,'$csult',Stream,0), !,
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'$current_module'(M),
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'$file_name'(Stream,FName),
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(
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'$loaded'(Stream, M, TrueFileName)
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->
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true
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;
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'$consulting_file_name'(Stream,TrueFileName),
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% the following avoids import of all public predicates
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recorda('$importing','$importing'(TrueFileName),R),
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'$reconsult'(File,M,Stream)
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),
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'$close'(Stream),
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( var(R) -> true; erased(R) -> true; erase(R)),
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(
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recorded('$module','$module'(TrueFileName,Module,Publics),_)
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->
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'$use_preds'(Imports,Publics,Module,M)
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;
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true
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).
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'$use_module'(Module,File,Imports) :-
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'$do_error'(permission_error(input,stream,File),use_module(Module,File,Imports)).
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'$consulting_file_name'(Stream,F) :-
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'$file_name'(Stream, F).
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'$module'(_,N,P) :-
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'$module_dec'(N,P).
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'$module'(O,N,P,Opts) :- !,
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'$module'(O,N,P),
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'$process_module_decls_options'(Opts,module(Opts,N,P)).
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'$process_module_decls_options'(Var,Mod) :-
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var(Var), !,
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'$do_error'(instantiation_error,Mod).
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'$process_module_decls_options'([],_) :- !.
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'$process_module_decls_options'([H|L],M) :- !,
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'$process_module_decls_option'(H,M),
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'$process_module_decls_options'(L,M).
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'$process_module_decls_options'(T,M) :-
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'$do_error'(type_error(list,T),M).
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'$process_module_decls_option'(Var,M) :-
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var(Var),
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'$do_error'(instantiation_error,M).
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'$process_module_decls_option'(At,_) :-
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atom(At), !,
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'$use_module'(At).
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'$process_module_decls_option'(library(L),_) :- !,
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'$use_module'(library(L)).
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'$process_module_decls_option'(hidden(Bool),M) :- !,
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'$process_hidden_module'(Bool, M).
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'$process_module_decls_option'(Opt,M) :-
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'$do_error'(domain_error(module_decl_options,Opt),M).
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'$process_hidden_module'(TNew,M) :-
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'$convert_true_off_mod3'(TNew, New, M),
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source_mode(Old, New),
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'$prepare_restore_hidden'(Old,New).
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'$convert_true_off_mod3'(true, off, _).
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'$convert_true_off_mod3'(false, on, _).
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'$convert_true_off_mod3'(X, _, M) :-
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'$do_error'(domain_error(module_decl_options,hidden(X)),M).
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'$prepare_restore_hidden'(Old,Old) :- !.
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'$prepare_restore_hidden'(Old,New) :-
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recorda('$system_initialisation', source_mode(New,Old), _).
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module(N) :-
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var(N),
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'$do_error'(instantiation_error,module(N)).
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module(N) :-
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atom(N), !,
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% set it as current module.
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'$current_module'(_,N).
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module(N) :-
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'$do_error'(type_error(atom,N),module(N)).
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'$module_dec'(N,P) :-
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'$current_module'(Old,N),
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get_value('$consulting_file',F),
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'$add_module_on_file'(N, F, P),
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( recorded('$importing','$importing'(F),_) ->
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true
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;
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'$import'(P,N,Old)
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).
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'$add_module_on_file'(Mod, F, Exports) :-
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recorded('$module','$module'(F0,Mod,_),R), !,
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'$add_preexisting_module_on_file'(F, F0, Mod, Exports, R).
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'$add_module_on_file'(Mod, F, Exports) :-
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recorda('$module','$module'(F,Mod,Exports),_).
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% redefining a previously-defined file, no problem.
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'$add_preexisting_module_on_file'(F, F, Mod, Exports, R) :- !,
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erase(R),
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( recorded('$import','$import'(M,T,_,_),R), erase(R), fail; true),
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recorda('$module','$module'(F,Mod,Exports),_).
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'$add_preexisting_module_on_file'(F,F0,Mod,Exports,R) :-
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repeat,
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format(user_error, "The module ~a is being redefined.~n Old file: ~a~n New file: ~a~nDo you really want to redefine it? (y or n)",[Mod,F0,F]),
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'$mod_scan'(C), !,
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( C is "y" ->
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'$add_preexisting_module_on_file'(F, F, Mod, Exports, R)
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;
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'$do_error'(permission_error(module,redefined,Mod),module(Mod,Exports))
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).
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'$mod_scan'(C) :-
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get0(C),
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'$skipeol'(C),
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(C is "y" ; C is "n").
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'$import'([],_,_) :- !.
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'$import'([N/K|L],M,T) :-
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integer(K), atom(N), !,
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( '$check_import'(M,T,N,K) ->
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( T = user ->
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( recordzifnot('$import','$import'(M,user,N,K),_) -> true ; true)
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;
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( recordaifnot('$import','$import'(M,T,N,K),_) -> true ; true )
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)
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;
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true
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),
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'$import'(L,M,T).
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'$import'([PS|L],M,T) :-
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'$do_error'(domain_error(predicate_spec,PS),import([PS|L])).
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'$check_import'(M,T,N,K) :-
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recorded('$import','$import'(M1,T,N,K),R), M1 \= M, /* ZP */ !,
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format(user_error,"NAME CLASH: ~w was already imported to module ~w;~n",[M1:N/K,T]),
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format(user_error," Do you want to import it from ~w ? [y or n] ",M),
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repeat,
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get0(C), '$skipeol'(C),
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( C is "y" -> erase(R), !;
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C is "n" -> !, fail;
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write(user_error, ' Please answer with ''y'' or ''n'' '), fail
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).
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'$check_import'(_,_,_,_).
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% $use_preds(Imports,Publics,Mod,M)
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'$use_preds'(M:L,Publics,Mod,_) :-
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'$use_preds'(L,Publics,Mod,M).
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'$use_preds'([],_,_,_) :- !.
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'$use_preds'([P|Ps],Publics,Mod,M) :- !,
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'$use_preds'(P,Publics,Mod,M),
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'$use_preds'(Ps,Publics,Mod,M).
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'$use_preds'(N/K,Publics,M,Mod) :-
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( '$member'(N/K,Publics) -> true ;
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print_message(warning,import(N/K,Mod,M,private))
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),
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( '$check_import'(M,Mod,N,K) ->
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% format(user_error,'[ Importing ~w to ~w]~n',[M:N/K,Mod]),
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% '$trace_module'(importing(M:N/K,Mod)),
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(Mod = user ->
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( recordzifnot('$import','$import'(M,user,N,K),_) -> true ; true )
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;
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( recordaifnot('$import','$import'(M,Mod,N,K),_) -> true ; true )
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)
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;
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true
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).
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% expand module names in a clause
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'$module_expansion'(((Mod:H) :-B ),((Mod:H) :- B1),((Mod:H) :- BO),M) :- !,
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'$prepare_body_with_correct_modules'(B, M, B0),
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'$module_u_vars'(H,UVars,M), % collect head variables in
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% expanded positions
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'$module_expansion'(B0,B1,BO,M,M,M,UVars). % expand body
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'$module_expansion'((H:-B),(H:-B1),(H:-BO),M) :-
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'$module_u_vars'(H,UVars,M), % collect head variables in
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% expanded positions
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'$module_expansion'(B,B1,BO,M,M,M,UVars). % expand body
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% $trace_module((H:-B),(H:-B1)).
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% expand module names in a body
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'$prepare_body_with_correct_modules'(V,M,call(M:V)) :- var(V), !.
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'$prepare_body_with_correct_modules'((A,B),M,(A1,B1)) :- !,
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'$prepare_body_with_correct_modules'(A,M,A1),
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'$prepare_body_with_correct_modules'(B,M,B1).
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'$prepare_body_with_correct_modules'((A;B),M,(A1;B1)) :- !,
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'$prepare_body_with_correct_modules'(A,M,A1),
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'$prepare_body_with_correct_modules'(B,M,B1).
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'$prepare_body_with_correct_modules'((A->B),M,(A1->B1)) :- !,
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'$prepare_body_with_correct_modules'(A,M,A1),
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'$prepare_body_with_correct_modules'(B,M,B1).
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'$prepare_body_with_correct_modules'(true,_,true) :- !.
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'$prepare_body_with_correct_modules'(fail,_,fail) :- !.
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'$prepare_body_with_correct_modules'(false,_,false) :- !.
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'$prepare_body_with_correct_modules'(M:G,_,M:G) :- !.
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'$prepare_body_with_correct_modules'(G,M,G) :-
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'$system_predicate'(G,M), !.
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'$prepare_body_with_correct_modules'(G,M,M:G).
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'$trace_module'(X) :-
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telling(F),
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tell('P0:debug'),
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write(X),nl,
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tell(F), fail.
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'$trace_module'(_).
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'$trace_module'(X,Y) :- X==Y, !.
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'$trace_module'(X,Y) :-
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telling(F),
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tell('~/.dbg.modules'),
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write('***************'), nl,
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portray_clause(X),
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portray_clause(Y),
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tell(F),fail.
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'$trace_module'(_,_).
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% expand module names in a body
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% args are:
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% goals to expand
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% code to pass to compiler
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% code to pass to listing
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% current module for looking up preds
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% current module for fixing up meta-call arguments
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% current module for predicate
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% head variables.
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'$module_expansion'(V,call(MM:V),call(MM:V),_M,MM,_TM,_) :- var(V), !.
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'$module_expansion'((A,B),(A1,B1),(AO,BO),M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars),
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'$module_expansion'(B,B1,BO,M,MM,TM,HVars).
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'$module_expansion'((A;B),(A1;B1),(AO;BO),M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars),
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'$module_expansion'(B,B1,BO,M,MM,TM,HVars).
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'$module_expansion'((A|B),(A1|B1),(AO|BO),M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars),
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'$module_expansion'(B,B1,BO,M,MM,TM,HVars).
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'$module_expansion'((A->B),(A1->B1),(AO->BO),M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars),
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'$module_expansion'(B,B1,BO,M,MM,TM,HVars).
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'$module_expansion'(\+A,\+A1,\+AO,M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars).
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'$module_expansion'(not(A),not(A1),not(AO),M,MM,TM,HVars) :- !,
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'$module_expansion'(A,A1,AO,M,MM,TM,HVars).
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'$module_expansion'(true,true,true,_,_,_,_) :- !.
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'$module_expansion'(fail,fail,fail,_,_,_,_) :- !.
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'$module_expansion'(false,false,false,_,_,_,_) :- !.
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% if I don't know what the module is, I cannot do anything to the goal,
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% so I just put a call for later on.
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'$module_expansion'(M:G,call(M:G),call(M:G),_,_,_,_) :- var(M), !.
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'$module_expansion'(M:G,G1,GO,_,_,TM,HVars) :-
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'$module_expansion'(G,G1,GO,M,M,TM,HVars).
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% if M1 is given explicitly process G within M1's context.
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% '$module_expansion'(M:G,G1,GO,_Mod,_MM,TM,HVars) :- !,
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% % is this imported from some other module M1?
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% ( '$imported_pred'(G, M, M1) ->
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% % continue recursively...
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% '$module_expansion'(G,G1,GO,M1,M,TM,HVars)
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% ;
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% (
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% '$meta_expansion'(M, M, G, NG, HVars)
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% ;
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% G = NG
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% ),
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% '$complete_goal_expansion'(NG, M, M, TM, G1, GO, HVars)
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% ).
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%
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% next, check if this is something imported.
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%
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'$module_expansion'(G, G1, GO, CurMod, MM, TM, HVars) :-
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% is this imported from some other module M1?
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( '$imported_pred'(G, CurMod, M1) ->
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'$module_expansion'(G, G1, GO, M1, MM, TM, HVars)
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;
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( '$meta_expansion'(CurMod, MM, G, GI, HVars)
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;
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GI = G
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),
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'$complete_goal_expansion'(GI, CurMod, MM, TM, G1, GO, HVars)
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).
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'$imported_pred'(G, ImportingMod, ExportingMod) :-
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'$undefined'(G, ImportingMod),
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functor(G,F,N),
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recorded('$import','$import'(ExportingMod,ImportingMod,F,N),_),
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ExportingMod \= ImportingMod.
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% args are:
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% goal to expand
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% current module for looking up pred
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% current module from top-level clause
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% goal to pass to compiler
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% goal to pass to listing
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% head variables.
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'$complete_goal_expansion'(G, M, CM, TM, G1, G2, HVars) :-
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'$pred_goal_expansion_on',
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user:goal_expansion(G,M,GI), !,
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'$module_expansion'(GI,G1,G2,M,CM,TM,HVars).
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'$complete_goal_expansion'(G, M, CM, TM, G1, G2, HVars) :-
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'$system_predicate'(G,M), !,
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'$c_built_in'(G,M,Gi),
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(Gi \== G ->
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'$module_expansion'(Gi,_,G2,M,CM,TM,HVars),
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% make built-in processing transparent.
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(TM = M -> G1 = G ; G1 = M:G)
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; TM = M ->
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G2 = G, G1 = G
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;
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G2 = M:G, G1 = M:G % atts:
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).
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'$complete_goal_expansion'(G, Mod, _, Mod, G, G, _) :- !.
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'$complete_goal_expansion'(G, GMod, _, _, GMod:G, GMod:G, _).
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% meta_predicate declaration
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% records $meta_predicate(SourceModule,Functor,Arity,Declaration)
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% directive now meta_predicate Ps :- $meta_predicate(Ps).
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:- dynamic_predicate('$meta_predicate'/4,logical).
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:- multifile '$meta_predicate'/4.
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'$meta_predicate'((P,Ps), M) :- !,
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'$meta_predicate'(P, M),
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'$meta_predicate'(Ps, M).
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'$meta_predicate'(M:D, _) :- !,
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'$meta_predicate'(D, M).
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'$meta_predicate'(P, M1) :-
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'$install_meta_predicate'(P, M1).
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'$install_meta_predicate'(P, M1) :-
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functor(P,F,N),
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( M1 = prolog -> M = _ ; M1 = M),
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( retractall('$meta_predicate'(F,M,N,_)), fail ; true),
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asserta(prolog:'$meta_predicate'(F,M,N,P)),
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'$flags'(P, M1, Fl, Fl),
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NFlags is Fl \/ 0x200000,
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'$flags'(P, M1, Fl, NFlags).
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% return list of vars in expanded positions on the head of a clause.
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%
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% these variables should not be expanded by meta-calls in the body of the goal.
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%
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'$module_u_vars'(H,UVars,M) :-
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functor(H,F,N),
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'$meta_predicate'(F,M,N,D), !,
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'$module_u_vars'(N,D,H,UVars).
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'$module_u_vars'(_,[],_).
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'$module_u_vars'(0,_,_,[]) :- !.
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'$module_u_vars'(I,D,H,[Y|L]) :-
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arg(I,D,X), ( X=':' ; integer(X)),
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arg(I,H,Y), var(Y), !,
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I1 is I-1,
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'$module_u_vars'(I1,D,H,L).
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'$module_u_vars'(I,D,H,L) :-
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I1 is I-1,
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'$module_u_vars'(I1,D,H,L).
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% expand arguments of a meta-predicate
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% $meta_expansion(ModuleWhereDefined,CurrentModule,Goal,ExpandedGoal,MetaVariables)
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'$meta_expansion'(Mod,MP,G,G1,HVars) :-
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functor(G,F,N),
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'$meta_predicate'(F,Mod,N,D), !,
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functor(G1,F,N),
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'$meta_expansion_loop'(N,D,G,G1,HVars,MP).
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% format(user_error," gives ~w~n]",[G1]).
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% expand argument
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'$meta_expansion_loop'(0,_,_,_,_,_) :- !.
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'$meta_expansion_loop'(I,D,G,G1,HVars,M) :-
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arg(I,D,X), (X==':' ; integer(X)),
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arg(I,G,A), '$do_expand'(A,HVars), !,
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'$process_expanded_arg'(A, M, NA),
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arg(I,G1,NA),
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I1 is I-1,
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'$meta_expansion_loop'(I1,D,G,G1,HVars,M).
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'$meta_expansion_loop'(I,D,G,G1,HVars,M) :-
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arg(I,G,A),
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arg(I,G1,A),
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|
I1 is I-1,
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'$meta_expansion_loop'(I1,D,G,G1,HVars,M).
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% check if an argument should be expanded
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'$do_expand'(V,HVars) :- var(V), !, '$not_in_vars'(V,HVars).
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'$do_expand'(_:_,_) :- !, fail.
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'$do_expand'(_,_).
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'$process_expanded_arg'(V, M, M:V) :- var(V), !.
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'$process_expanded_arg'((V1,V2), M, (NV1,NV2)) :- !,
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'$process_expanded_arg'(V1, M, NV1),
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'$process_expanded_arg'(V2, M, NV2).
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'$process_expanded_arg'((V1;V2), M, (NV1;NV2)) :- !,
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|
'$process_expanded_arg'(V1, M, NV1),
|
|
'$process_expanded_arg'(V2, M, NV2).
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'$process_expanded_arg'((V1|V2), M, (NV1|NV2)) :- !,
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|
'$process_expanded_arg'(V1, M, NV1),
|
|
'$process_expanded_arg'(V2, M, NV2).
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'$process_expanded_arg'((V1->V2), M, (NV1->NV2)) :- !,
|
|
'$process_expanded_arg'(V1, M, NV1),
|
|
'$process_expanded_arg'(V2, M, NV2).
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|
'$process_expanded_arg'(\+V, M, \+NV) :- !,
|
|
'$process_expanded_arg'(V, M, NV).
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|
'$process_expanded_arg'(M:A, _, M:A) :- !.
|
|
%'$process_expanded_arg'(G, M, G) :-
|
|
% '$system_predicate'(G,M), !.
|
|
'$process_expanded_arg'(A, M, M:A).
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|
|
|
'$not_in_vars'(_,[]).
|
|
'$not_in_vars'(V,[X|L]) :- X\==V, '$not_in_vars'(V,L).
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|
|
|
current_module(Mod) :-
|
|
'$all_current_modules'(Mod).
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|
|
|
current_module(Mod,TFN) :-
|
|
'$all_current_modules'(Mod),
|
|
( recorded('$module','$module'(TFN,Mod,_Publics),_) -> true ; TFN = user ).
|
|
|
|
source_module(Mod) :-
|
|
'$current_module'(Mod).
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|
|
|
'$member'(X,[X|_]) :- !.
|
|
'$member'(X,[_|L]) :- '$member'(X,L).
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|
|
|
% comma has its own problems.
|
|
:- '$install_meta_predicate'((:,:), prolog).
|
|
|
|
:- meta_predicate
|
|
abolish(:),
|
|
abolish(:,+),
|
|
all(?,:,?),
|
|
assert(:),
|
|
assert(:,+),
|
|
assert_static(:),
|
|
asserta(:),
|
|
asserta(:,+),
|
|
asserta_static(:),
|
|
assertz(:),
|
|
assertz(:,+),
|
|
assertz_static(:),
|
|
bagof(?,:,?),
|
|
bb_get(:,-),
|
|
bb_put(:,+),
|
|
bb_delete(:,?),
|
|
bb_update(:,?,?),
|
|
call(:),
|
|
call_with_args(:),
|
|
call_with_args(:,?),
|
|
call_with_args(:,?,?),
|
|
call_with_args(:,?,?,?),
|
|
call_with_args(:,?,?,?,?),
|
|
call_with_args(:,?,?,?,?,?),
|
|
call_with_args(:,?,?,?,?,?,?),
|
|
call_with_args(:,?,?,?,?,?,?,?),
|
|
call_with_args(:,?,?,?,?,?,?,?,?),
|
|
call_with_args(:,?,?,?,?,?,?,?,?,?),
|
|
call_residue(:,?),
|
|
catch(:,+,:),
|
|
clause(:,?),
|
|
clause(:,?,?),
|
|
compile(:),
|
|
consult(:),
|
|
current_predicate(:),
|
|
current_predicate(?,:),
|
|
depth_bound_call(:,+),
|
|
ensure_loaded(:),
|
|
findall(?,:,?),
|
|
findall(?,:,?,?),
|
|
freeze(?,:),
|
|
hide_predicate(:),
|
|
if(:,:,:),
|
|
incore(:),
|
|
listing(:),
|
|
nospy(:),
|
|
not(:),
|
|
once(:),
|
|
phrase(:,?),
|
|
phrase(:,?,+),
|
|
predicate_property(:,?),
|
|
predicate_statistics(:,-,-,-),
|
|
on_exception(+,:,:),
|
|
reconsult(:),
|
|
retract(:),
|
|
retract(:,?),
|
|
retractall(:),
|
|
reconsult(:),
|
|
setof(?,:,?),
|
|
spy(:),
|
|
unknown(+,:),
|
|
use_module(:),
|
|
use_module(:,?),
|
|
use_module(?,:,?),
|
|
when(?,:),
|
|
^(+,:),
|
|
\+ : .
|
|
|
|
%
|
|
% if we are asserting something in somewhere else's module,
|
|
% we need this little bird.
|
|
%
|
|
% assert((a:g :- b)) then SICStus compiles this into the original module.
|
|
% YAP is not 100% compatible, as it will transform this into:
|
|
% a:assert(g :- user:b))
|
|
%
|
|
'$preprocess_clause_before_mod_change'((H:-B),M,M1,(H:-B1)) :-
|
|
'$module_u_vars'(H,UVars,M1),
|
|
'$preprocess_body_before_mod_change'(B,M,UVars,B1).
|
|
|
|
'$preprocess_body_before_mod_change'(V,M,_,call(M:V)) :- var(V), !.
|
|
'$preprocess_body_before_mod_change'((G1,G2),M,UVars,(NG1,NG2)) :- !,
|
|
'$preprocess_body_before_mod_change'(G1,M,UVars,NG1),
|
|
'$preprocess_body_before_mod_change'(G2,M,UVars,NG2).
|
|
'$preprocess_body_before_mod_change'((G1;G2),M,UVars,(NG1;NG2)) :- !,
|
|
'$preprocess_body_before_mod_change'(G1,M,UVars,NG1),
|
|
'$preprocess_body_before_mod_change'(G2,M,UVars,NG2).
|
|
'$preprocess_body_before_mod_change'((G1->G2),M,UVars,(NG1->NG2)) :- !,
|
|
'$preprocess_body_before_mod_change'(G1,M,UVars,NG1),
|
|
'$preprocess_body_before_mod_change'(G2,M,UVars,NG2).
|
|
'$preprocess_body_before_mod_change'(M:G,_,_,M:G) :- !.
|
|
'$preprocess_body_before_mod_change'(true,_,_,true) :- !.
|
|
'$preprocess_body_before_mod_change'(fail,_,_,fail) :- !.
|
|
'$preprocess_body_before_mod_change'(false,_,_,false) :- !.
|
|
'$preprocess_body_before_mod_change'(G,M,UVars,M:NG) :-
|
|
'$meta_expansion'(M, M, G, NG, UVars), !.
|
|
'$preprocess_body_before_mod_change'(G,M,_,G) :-
|
|
'$system_predicate'(G,M), !.
|
|
'$preprocess_body_before_mod_change'(G,M,_,M:G).
|
|
|
|
|