diogo/yap-6.3
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make sure throw goes away on deterministic computations.

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This commit is contained in:
Vitor Santos Costa 2009-05-04 18:10:07 -05:00
parent d7559c3f96
commit 42442bd360
1 changed files with 15 additions and 11 deletions
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26
pl/boot.yap
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@ -510,17 +510,17 @@ true :- true.
),
fail.
'$do_yes_no'([X|L], M) :- !, '$csult'([X|L], M).
'$do_yes_no'(G, M) :-
'$exit_system_mode',
'$execute'(M:G),
( '$enter_system_mode' ; '$exit_system_mode', fail).
'$do_yes_no'([X|L], M) :- !, '$csult'([X|L], M).
'$do_yes_no'(G, M) :-
'$exit_system_mode',
'$execute'(M:G),
( '$enter_system_mode' ; '$exit_system_mode', fail).
'$write_query_answer_true'([]) :- !,
format(user_error,'~ntrue',[]).
'$write_query_answer_true'(_).
'$write_query_answer_true'([]) :- !,
format(user_error,'~ntrue',[]).
'$write_query_answer_true'(_).
'$output_frozen'(_,V,LGs) :-
'$output_frozen'(_,V,LGs) :-
\+ '$undefined'(bindings_message(_,_,_), swi),
swi:bindings_message(V, LGs, []), !.
'$output_frozen'(G,V,LGs) :-
@ -1124,8 +1124,10 @@ expand_term(Term,Expanded) :-
% where was the previous catch
catch(G, C, A) :-
'$catch'(C,A,_),
yap_hacks:current_choice_point(CP0),
'$execute'(G),
'$true'.
yap_hacks:current_choice_point(CP1),
(CP0 == CP1 -> !; true ).
% makes sure we have an environment.
'$true'.
@ -1139,8 +1141,10 @@ catch(G, C, A) :-
'$system_catch'(G, M, C, A) :-
% check current trail
'$catch'(C,A,_),
yap_hacks:current_choice_point(CP0),
'$execute_nonstop'(G, M),
'$true'.
yap_hacks:current_choice_point(CP1),
(CP0 == CP1 -> !; true ).
%
% throw has to be *exactly* after system catch!