fix needless check in dif/2 implementation

2019-02-14 16:12:24 -04:00
parent 8958a563de
commit 6b879467f3
1 changed files with 3 additions and 5 deletions
--- a/src/prolog/lib/dif.pl
+++ b/src/prolog/lib/dif.pl
@@ -38,10 +38,8 @@ verify_attributes(Var, Value, Goals) :-
 dif(X, Y) :- X \== Y,
             (   X \= Y -> true
             ;   term_variables(X, XVars), term_variables(Y, YVars),
-		 (   XVars == [], YVars == [] -> false
-		 ;   dif_set_variables(XVars, X, Y),
+	         dif_set_variables(XVars, X, Y),
 		 dif_set_variables(YVars, X, Y)
-		 )
 	     ).

 gather_dif_goals(Attrs, _) :-