/************************************************************************* * * * YAP Prolog * * * * Yap Prolog was developed at NCCUP - Universidade do Porto * * * * Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 * * * ************************************************************************** * * * File: directives.yap * * Last rev: * * mods: * * comments: directing system execution * * * *************************************************************************/ /** @defgroup YAPProgramming Programming in YAP + @ref Syntax + @ref YAPCompilerSettings + @ref Indexing + @ref Deb_Interaction */ :- system_module( '$_directives', [user_defined_directive/2], ['$all_directives'/1, '$exec_directives'/5]). :- use_system_module( '$_boot', ['$command'/4, '$system_catch'/4]). :- use_system_module( '$_consult', ['$elif'/2, '$else'/1, '$endif'/1, '$if'/2, '$include'/2, '$initialization'/1, '$initialization'/2, '$load_files'/3, '$require'/2, '$set_encoding'/1, '$use_module'/3]). :- use_system_module( '$_modules', ['$meta_predicate'/2, '$module'/3, '$module'/4, '$module_transparent'/2]). :- use_system_module( '$_preddecls', ['$discontiguous'/2, '$dynamic'/2]). :- use_system_module( '$_preds', ['$noprofile'/2, '$public'/2]). :- use_system_module( '$_threads', ['$thread_local'/2]). '$all_directives'(_:G1) :- !, '$all_directives'(G1). '$all_directives'((G1,G2)) :- !, '$all_directives'(G1), '$all_directives'(G2). '$all_directives'(G) :- !, '$directive'(G). %:- '$multifile'( '$directive'/1, prolog ). :- multifile prolog:'$exec_directive'/5, prolog:'$directive'/1. '$directive'(block(_)). '$directive'(char_conversion(_,_)). '$directive'(compile(_)). '$directive'(consult(_)). '$directive'(discontiguous(_)). '$directive'(dynamic(_)). '$directive'(elif(_)). '$directive'(else). '$directive'(encoding(_)). '$directive'(endif). '$directive'(ensure_loaded(_)). '$directive'(expects_dialect(_)). '$directive'(if(_)). '$directive'(include(_)). '$directive'(initialization(_)). '$directive'(initialization(_,_)). '$directive'(license(_)). '$directive'(meta_predicate(_)). '$directive'(module(_,_)). '$directive'(module(_,_,_)). '$directive'(module_transparent(_)). '$directive'(multifile(_)). '$directive'(noprofile(_)). '$directive'(public(_)). '$directive'(op(_,_,_)). '$directive'(require(_)). '$directive'(set_prolog_flag(_,_)). '$directive'(reconsult(_)). '$directive'(reexport(_)). '$directive'(reexport(_,_)). '$directive'(predicate_options(_,_,_)). '$directive'(thread_initialization(_)). '$directive'(thread_local(_)). '$directive'(uncutable(_)). '$directive'(use_module(_)). '$directive'(use_module(_,_)). '$directive'(use_module(_,_,_)). '$directive'(wait(_)). '$exec_directives'((G1,G2), Mode, M, VL, Pos) :- !, '$exec_directives'(G1, Mode, M, VL, Pos), '$exec_directives'(G2, Mode, M, VL, Pos). '$exec_directives'(G, Mode, M, VL, Pos) :- '$exec_directive'(G, Mode, M, VL, Pos). '$exec_directive'(multifile(D), _, M, _, _) :- '$system_catch'('$multifile'(D, M), M, Error, user:'$LoopError'(Error, top)). '$exec_directive'(discontiguous(D), _, M, _, _) :- '$discontiguous'(D,M). /** @pred initialization Execute the goals defined by initialization/1. Only the first answer is considered. */ '$exec_directive'(initialization(D), _, M, _, _) :- '$initialization'(M:D). '$exec_directive'(initialization(D,OPT), _, M, _, _) :- '$initialization'(M:D, OPT). '$exec_directive'(thread_initialization(D), _, M, _, _) :- '$thread_initialization'(M:D). '$exec_directive'(expects_dialect(D), _, _, _, _) :- expects_dialect(D). '$exec_directive'(encoding(Enc), _, _, _, _) :- '$set_encoding'(Enc). '$exec_directive'(include(F), Status, _, _, _) :- '$include'(F, Status). % don't declare modules into Prolog Module '$exec_directive'(module(N,P), Status, _, _, _) :- '$module'(Status,N,P). '$exec_directive'(module(N,P,Op), Status, _, _, _) :- '$module'(Status,N,P,Op). '$exec_directive'(meta_predicate(P), _, M, _, _) :- strip_module(M:P,M0,P0), '$meta_predicate'(M0:P0). '$exec_directive'(module_transparent(P), _, M, _, _) :- '$module_transparent'(P, M). '$exec_directive'(noprofile(P), _, M, _, _) :- '$noprofile'(P, M). '$exec_directive'(require(Ps), _, M, _, _) :- '$require'(Ps, M). '$exec_directive'(dynamic(P), _, M, _, _) :- '$dynamic'(P, M). '$exec_directive'(thread_local(P), _, M, _, _) :- '$thread_local'(P, M). '$exec_directive'(op(P,OPSEC,OP), _, _, _, _) :- '$current_module'(M), op(P,OPSEC,M:OP). '$exec_directive'(set_prolog_flag(F,V), _, _, _, _) :- set_prolog_flag(F,V). '$exec_directive'(ensure_loaded(Fs), _, M, _, _) :- '$load_files'(M:Fs, [if(changed)], ensure_loaded(Fs)). '$exec_directive'(char_conversion(IN,OUT), _, _, _, _) :- char_conversion(IN,OUT). '$exec_directive'(public(P), _, M, _, _) :- '$public'(P, M). '$exec_directive'(compile(Fs), _, M, _, _) :- '$load_files'(M:Fs, [], compile(Fs)). '$exec_directive'(reconsult(Fs), _, M, _, _) :- '$load_files'(M:Fs, [], reconsult(Fs)). '$exec_directive'(consult(Fs), _, M, _, _) :- '$load_files'(M:Fs, [consult(consult)], consult(Fs)). '$exec_directive'(use_module(F), _, M, _, _) :- use_module(M:F). '$exec_directive'(reexport(F), _, M, _, _) :- '$load_files'(M:F, [if(not_loaded), silent(true), reexport(true),must_be_module(true)], reexport(F)). '$exec_directive'(reexport(F,Spec), _, M, _, _) :- '$load_files'(M:F, [if(changed), silent(true), imports(Spec), reexport(true),must_be_module(true)], reexport(F, Spec)). '$exec_directive'(use_module(F, Is), _, M, _, _) :- use_module(M:F, Is). '$exec_directive'(use_module(Mod,F,Is), _, _, _, _) :- '$use_module'(Mod,F,Is). '$exec_directive'(block(BlockSpec), _, _, _, _) :- '$block'(BlockSpec). '$exec_directive'(wait(BlockSpec), _, _, _, _) :- '$wait'(BlockSpec). '$exec_directive'(table(PredSpec), _, M, _, _) :- '$table'(PredSpec, M). '$exec_directive'(uncutable(PredSpec), _, M, _, _) :- '$uncutable'(PredSpec, M). '$exec_directive'(if(Goal), Context, M, _, _) :- '$if'(M:Goal, Context). '$exec_directive'(else, Context, _, _, _) :- '$else'(Context). '$exec_directive'(elif(Goal), Context, M, _, _) :- '$elif'(M:Goal, Context). '$exec_directive'(endif, Context, _, _, _) :- '$endif'(Context). '$exec_directive'(license(_), Context, _, _, _) :- Context \= top. '$exec_directive'(predicate_options(PI, Arg, Options), Context, Module, VL, Pos) :- Context \= top, predopts:expand_predicate_options(PI, Arg, Options, Clauses), '$assert_list'(Clauses, Context, Module, VL, Pos). '$assert_list'([], _Context, _Module, _VL, _Pos). '$assert_list'([Clause|Clauses], Context, Module, VL, Pos) :- '$command'(Clause, VL, Pos, Context), '$assert_list'(Clauses, Context, Module, VL, Pos). % % allow users to define their own directives. % user_defined_directive(Dir,_) :- '$directive'(Dir), !. user_defined_directive(Dir,Action) :- functor(Dir,Na,Ar), functor(NDir,Na,Ar), '$current_module'(M, prolog), assert_static(prolog:'$directive'(NDir)), assert_static(prolog:('$exec_directive'(Dir, _, _, _, _) :- Action)), '$current_module'(_, M). '$thread_initialization'(M:D) :- eraseall('$thread_initialization'), recorda('$thread_initialization',M:D,_), fail. '$thread_initialization'(M:D) :- '$initialization'(M:D). % % This command is very different depending on the language mode we are in. % % ISO only wants directives in files % SICStus accepts everything in files % YAP accepts everything everywhere % '$process_directive'(G, top, M, VL, Pos) :- current_prolog_flag(language_mode, yap), !, /* strict_iso on */ '$process_directive'(G, consult, M, VL, Pos). '$process_directive'(G, top, M, _, _) :- !, '$do_error'(context_error((:-M:G),clause),query). % % default case % '$process_directive'(Gs, Mode, M, VL, Pos) :- '$all_directives'(Gs), !, '$exec_directives'(Gs, Mode, M, VL, Pos). % % ISO does not allow goals (use initialization). % '$process_directive'(D, _, M, _VL, _Pos) :- current_prolog_flag(language_mode, iso), !, % ISO Prolog mode, go in and do it, '$do_error'(context_error((:- M:D),query),directive). % % but YAP and SICStus do. % '$process_directive'(G, _Mode, M, _VL, _Pos) :- '$execute'(M:G), !. '$process_directive'(G, _Mode, M, _VL, _Pos) :- format(user_error,':- ~w:~w failed.~n',[M,G]).