diogo/yap-6.3
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in SWI mode allow new flags to be silently defined.

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This commit is contained in:
Vitor Santos Costa 2009-11-23 10:06:51 +00:00
parent 657e0a13bd
commit e4c9d69044
1 changed files with 13 additions and 0 deletions
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13
pl/directives.yap
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@ -1031,9 +1031,18 @@ set_prolog_flag(F,V) :-
set_prolog_flag(F,V) :-
var(V), !,
'$do_error'(instantiation_error,set_prolog_flag(F,V)).
set_prolog_flag(F, Val) :-
recorded('$dialect',swi,_),
prolog:'$user_defined_flag'(F,_), !,
yap_flag(F, Val).
set_prolog_flag(F,V) :-
\+ atom(F), !,
'$do_error'(type_error(atom,F),set_prolog_flag(F,V)).
set_prolog_flag(F,V) :-
recorded('$dialect',swi,_),
\+ yap_flag(F,_),
user_defined_flag(F),
fail.
set_prolog_flag(F,V) :-
yap_flag(F,V).
@ -1090,6 +1099,10 @@ user_defined_flag(Atom) :-
'$user_flag_value'(F, Val) :-
var(Val), !,
'$user_defined_flag'(F,Val).
'$user_flag_value'(F, Val) :-
recorded('$dialect',swi,_), !,
retractall(prolog:'$user_defined_flag'(F,_)),
assert(prolog:'$user_defined_flag'(Atom,Val)).
'$user_flag_value'(F, Val) :-
atomic(Val), !,
retractall(prolog:'$user_defined_flag'(F,_)),