fix semicontext notation

2018-10-15 22:31:53 -06:00
parent 3140c65f67
commit 1b7ffa00af
1 changed files with 3 additions and 4 deletions
--- a/src/prolog/lib/dcgs.pl
+++ b/src/prolog/lib/dcgs.pl
@@ -25,12 +25,11 @@ term_expansion(Term0, (ModHead :- ModBody)) :-
    !,
    nonvar(Head),
    Head =.. [RuleName | Args],
-    append(Args, ['$VAR'(0), '$VAR'(N)], ModArgs), %% problematic line.
+    append([SC | SCs], '$VAR'(N), SemiContextArgs),
+    append(Args, ['$VAR'(0), SemiContextArgs], ModArgs),
    ModHead =.. [RuleName | ModArgs],
    nonvar(Body),
-    expand_body(Body, ModBody1, 0, N1),
-    expand_body_term([SC | SCs], ModBody2, N1, N),
-    ModBody = (ModBody1, ModBody2).
+    expand_body(Body, ModBody, 0, N).
 term_expansion(Term0, (ModHead :- ModBody)) :-
    nonvar(Term0),
    Term0 = (Head --> Body),