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fix PL_is_list

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This commit is contained in:
Vitor Santos Costa 2012-10-08 18:26:40 +01:00
parent daf9f589b9
commit b0ddda1fde
1 changed files with 2 additions and 2 deletions
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2
library/dialect/swi/fli/swi.c
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@ -1799,7 +1799,7 @@ X_API int PL_is_list(term_t ts)
{
CACHE_REGS
YAP_Term t = Yap_GetFromSlot(ts PASS_REGS);
return Yap_IsListTerm(t);
return !IsVarTerm(t) && (t == TermNil || IsPairTerm(t));
}
X_API int