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yap-6.3
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get rid of some unnecessary choice-points in directives 

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@363 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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vsc 2002-02-15 22:31:22 +00:00
parent 87532119c6
commit 470f10d51b
2 changed files with 16 additions and 11 deletions
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1
changes4.3.html
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@ -16,6 +16,7 @@
<h2>Yap-4.3.21:</h2>
<ul>
<li>FIXED: make fileerrors default for SICStus. (Nicos Angelopoulos)</li>
<li>FIXED: g(X) :- (Z is 2*X; a(Z)) Z cannot be seen as a free
var. (Nicos Angelopoulos).</li>
<li>FIXED: atom_concat was not allocating heap correctly (Nicos Angelopoulos).</li>

26
pl/directives.yap
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@ -123,8 +123,8 @@ yap_flag(unhide,Atom) :- !, unhide(Atom).
yap_flag(gc,V) :-
var(V), !,
( '$get_value'('$gc',[]) -> V = off ; V = on).
yap_flag(gc,on) :- '$set_value'('$gc',true).
yap_flag(gc,off) :- '$set_value'('$gc',[]).
yap_flag(gc,on) :- !, '$set_value'('$gc',true).
yap_flag(gc,off) :- !, '$set_value'('$gc',[]).
yap_flag(gc_margin,N) :-
var(N) ->
'$get_value'('$gc_margin',N)
@ -137,15 +137,15 @@ yap_flag(gc_trace,V) :-
'$get_value'('$gc_verbose',N2),
'$get_value'('$gc_very_verbose',N3),
'$yap_flag_show_gc_tracing'(N1, N2, N3, V).
yap_flag(gc_trace,on) :-
yap_flag(gc_trace,on) :- !,
'$set_value'('$gc_trace',true),
'$set_value'('$gc_verbose',[]),
'$set_value'('$gc_very_verbose',[]).
yap_flag(gc_trace,verbose) :-
yap_flag(gc_trace,verbose) :- !,
'$set_value'('$gc_trace',[]),
'$set_value'('$gc_verbose',true),
'$set_value'('$gc_very_verbose',[]).
yap_flag(gc_trace,very_verbose) :-
yap_flag(gc_trace,very_verbose) :- !,
'$set_value'('$gc_trace',[]),
'$set_value'('$gc_verbose',true),
'$set_value'('$gc_very_verbose',true).
@ -158,7 +158,7 @@ yap_flag(syntax_errors, V) :- var(V), !,
yap_flag(syntax_errors, Option) :-
'$set_read_error_handler'(Option).
% compatibility flag
yap_flag(enhanced,on) :- '$set_value'('$enhanced',true).
yap_flag(enhanced,on) :- !, '$set_value'('$enhanced',true).
yap_flag(enhanced,off) :- '$set_value'('$enhanced',[]).
%
% show state of $
@ -170,7 +170,7 @@ yap_flag(dollar_as_lower_case,V) :-
%
% make $a a legit atom
%
yap_flag(dollar_as_lower_case,on) :-
yap_flag(dollar_as_lower_case,on) :- !,
'$change_type_of_char'(36,3).
%
% force quoting of '$a'
@ -185,7 +185,7 @@ yap_flag(bounded,X) :-
var(X), !,
'$access_yap_flags'(0, X1),
'$transl_to_true_false'(X1,X).
yap_flag(bounded,X) :-
yap_flag(bounded,X) :- !,
(X = true ; X = false), !,
throw(error(permission_error(modify,flag,bounded),yap_flag(bounded,X))).
yap_flag(bounded,X) :-
@ -195,7 +195,7 @@ yap_flag(bounded,X) :-
yap_flag(index,X) :- var(X), !,
( '$get_value'('$doindex',true) -> X=on ; X=off).
yap_flag(index,on) :- !, '$set_value'('$doindex',true).
yap_flag(index,off) :- !, '$set_value'('$doindex',[]).
yap_flag(index,off) :- '$set_value'('$doindex',[]).
yap_flag(informational_messages,X) :- var(X), !,
'$get_value'('$verbose',X).
@ -500,7 +500,7 @@ yap_flag(host_type,X) :-
V = gc_margin ;
V = gc_trace ;
% V = hide ;
% V = host_type ;
V = host_type ;
V = index ;
V = informational_messages ;
V = integer_rounding_function ;
@ -606,9 +606,13 @@ yap_flag(host_type,X) :-
stream_property(OUT,[alias(Alias)]), !.
current_prolog_flag(V,Out) :-
(var(V) ; atom(V) ), !,
var(V), !,
'$show_yap_flag_opts'(V,NOut),
NOut = Out.
current_prolog_flag(V,Out) :-
atom(V), !,
yap_flag(V,NOut),
NOut = Out.
current_prolog_flag(V,Out) :-
throw(error(type_error(atom,V),current_prolog_flag(V,Out))).