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This commit is contained in:
Vitor Santos Costa 2016-07-31 10:39:55 -05:00
parent 1aa3c26af6
commit 9686275b34
1 changed files with 53 additions and 0 deletions
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53
pl/directives.yap
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@ -242,3 +242,56 @@ user_defined_directive(Dir,Action) :-
fail. fail.
'$thread_initialization'(M:D) :- '$thread_initialization'(M:D) :-
'$initialization'(M:D). '$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).
'$process_directive'(G, top, _, _, _) :-
!,
'$do_error'(context_error((:- G),clause),query).
%
% allow modules
%
'$process_directive'(M:G, Mode, _, VL, Pos) :- !,
'$process_directive'(G, Mode, M, VL, Pos).
%
% 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,
'$do_error'(context_error((:- M:D),query),directive).
%
% but YAP and SICStus does.
%
'$process_directive'(G, Mode, M, VL, Pos) :-
( '$undefined'('$save_directive'(G, Mode, M, VL, Pos),prolog) ->
true
;
'$save_directive'(G, Mode, M, VL, Pos)
->
true
;
true
),
(
'$execute'(M:G)
->
true
;
format(user_error,':- ~w:~w failed.~n',[M,G])
).