161 lines
4.2 KiB
Prolog
161 lines
4.2 KiB
Prolog
/**
|
|
** @file imports.yap
|
|
*
|
|
* @brief Module systemm code to import predicates
|
|
*
|
|
* This code does not provide visible builtins.
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup ModuleBuiltins
|
|
* @{
|
|
*
|
|
* YAP follows the following protovol:
|
|
* - predicate is in current module;
|
|
* - predicate is in user
|
|
* - predicate will be autoloaded, SWI style.
|
|
*/
|
|
|
|
:- '$mk_dynamic'('$parent_module'(_,_),prolog).
|
|
|
|
/** @pred mimp
|
|
|
|
debug import table
|
|
|
|
*/
|
|
mimp :-
|
|
recorded('$import',I,_),
|
|
%'$import'(ExportingMod,ImportingMod,G0,G,_,_),_),
|
|
writeln(I),
|
|
%(ImportingMod:G :- ExportingMod:G0)),
|
|
fail.
|
|
|
|
|
|
%:- start_low_level_trace.
|
|
% parent module mechanism
|
|
%% system has priority
|
|
'$get_predicate_definition'(_ImportingMod:G,prolog:G) :-
|
|
nonvar(G),
|
|
'$pred_exists'(G,prolog).
|
|
%% I am there, no need to import
|
|
'$get_predicate_definition'(Mod:Pred,Mod:Pred) :-
|
|
nonvar(Pred),
|
|
'$pred_exists'(Pred, Mod).
|
|
%% export table
|
|
'$get_predicate_definition'(ImportingMod:G,ExportingMod:G0) :-
|
|
recorded('$import','$import'(ExportingMod,ImportingMod,G0,G,_,_),_).
|
|
%% parent/user
|
|
'$get_predicate_definition'(ImportingMod:G,ExportingMod:G0) :-
|
|
( '$parent_module'(ImportingMod, PMod) ; PMod = user ),
|
|
ImportingMod \= PMod,
|
|
'$get_predicate_definition'(PMod:G, ExportingMod:G0).
|
|
%% autoload`
|
|
%'$get_predicate_definition'(ImportingMod:G,ExportingMod:G) :-
|
|
% current_prolog_flag(autoload, true),
|
|
% '$autoload'(G, ImportingMod, ExportingMod, swi).
|
|
|
|
|
|
'$predicate_definition'(Imp:Pred,Exp:NPred) :-
|
|
'$predicate_definition'(Imp:Pred,[],Exp:NPred),
|
|
%writeln((Imp:Pred -> Exp:NPred )).
|
|
!.
|
|
|
|
'$one_predicate_definition'(Imp:Pred,Exp:NPred) :-
|
|
'$predicate_definition'(Imp:Pred,[],Exp:NPred),
|
|
%writeln((Imp:Pred -> Exp:NPred )).
|
|
!.
|
|
'$one_predicate_definition'(Exp:Pred,Exp:Pred).
|
|
|
|
'$predicate_definition'(M0:Pred0,Path,ModF:PredF) :-
|
|
'$get_predicate_definition'(M0:Pred0, Mod:Pred),
|
|
\+ lists:member(Mod:Pred,Path),
|
|
(
|
|
'$predicate_definition'(Mod:Pred,[Mod:Pred|Path],ModF:PredF)
|
|
;
|
|
Mod = ModF, Pred = PredF
|
|
).
|
|
|
|
%
|
|
'$get_undefined_predicate'(ImportingMod:G, ExportingMod:G0) :-
|
|
must_be_callable( ImportingMod:G ),
|
|
'$predicate_definition'(ImportingMod:G,[], ExportingMod:G0),
|
|
ImportingMod:G \= ExportingMod:G0,
|
|
!.
|
|
|
|
% be careful here not to generate an undefined exception.
|
|
'$imported_predicate'(ImportingMod:G, ExportingMod:G0) :-
|
|
( var(ImportingMod) ->
|
|
current_module(ImportingMod)
|
|
;
|
|
true
|
|
),
|
|
(
|
|
var(G) ->
|
|
'$current_predicate'(_,G,ImportingMod,_)
|
|
;
|
|
true
|
|
),
|
|
(
|
|
'$undefined'(G, ImportingMod)
|
|
->
|
|
'$predicate_definition'(ImportingMod:G, ExportingMod:G0),
|
|
ExportingMod \= ImportingMod
|
|
;
|
|
ExportingMod = ImportingMod, G = G0
|
|
).
|
|
|
|
|
|
% check if current module redefines an imported predicate.
|
|
% and remove import.
|
|
%
|
|
'$not_imported'(H, Mod) :-
|
|
recorded('$import','$import'(NM,Mod,NH,H,_,_),R),
|
|
NM \= Mod,
|
|
functor(NH,N,Ar),
|
|
print_message(warning,redefine_imported(Mod,NM,N/Ar)),
|
|
erase(R),
|
|
fail.
|
|
'$not_imported'(_, _).
|
|
|
|
|
|
'$autoload'(G, _mportingMod, ExportingMod, Dialect) :-
|
|
functor(G, Name, Arity),
|
|
'$pred_exists'(index(Name,Arity,ExportingMod,_),Dialect),
|
|
call(Dialect:index(Name,Arity,ExportingMod,_)),
|
|
!.
|
|
'$autoload'(G, ImportingMod, ExportingMod, _Dialect) :-
|
|
functor(G, N, K),
|
|
functor(G0, N, K),
|
|
'$autoloader_find_predicate'(G0,ExportingMod),
|
|
ExportingMod \= ImportingMod,
|
|
(recordzifnot('$import','$import'(ExportingMod,ImportingMod,G0,G0, N ,K),_),
|
|
\+ '$is_system_predicate'(G0, ExportingMod)
|
|
->
|
|
'$compile'((G:-ExportingMod:G0), reconsult ,(ImportingMod:G:-ExportingMod:G0), ImportingMod, _)
|
|
;
|
|
true
|
|
).
|
|
|
|
|
|
'$autoloader_find_predicate'(G,ExportingMod) :-
|
|
'__NB_getval__'('$autoloader_set', true, false), !,
|
|
autoloader:find_predicate(G,ExportingMod).
|
|
'$autoloader_find_predicate'(G,ExportingMod) :-
|
|
yap_flag(autoload, true, false),
|
|
yap_flag( unknown, Unknown, fail),
|
|
yap_flag(debug, Debug, false), !,
|
|
load_files([library(autoloader)],[silent(true)]),
|
|
nb_setval('$autoloader_set', true),
|
|
yap_flag(autoload, _, true),
|
|
yap_flag( unknown, _, Unknown),
|
|
yap_flag( debug, _, Debug),
|
|
setup_autoloader:find_predicate(G,ExportingMod).
|
|
|
|
|
|
|
|
|
|
/**
|
|
*
|
|
* @}
|
|
*/
|