add op/3 to builtin predicates

2019-03-30 18:14:47 -06:00
parent f55968b1b8
commit 0aefcf7eae
10 changed files with 186 additions and 42 deletions
--- a/src/prolog/write.rs
+++ b/src/prolog/write.rs
@@ -264,7 +264,7 @@ impl fmt::Display for SessionError {
                write!(f, "false."),
            &SessionError::QueryFailureWithException(ref e) =>
                write!(f, "{}", error_string(e)),
-            &SessionError::OpIsInfixAndPostFix =>
+            &SessionError::OpIsInfixAndPostFix(_) =>
                write!(f, "cannot define an op to be both postfix and infix."),
            &SessionError::NamelessEntry =>
                write!(f, "the predicate head is not an atom or clause."),