address issue #153

2019-09-05 22:43:50 -06:00
parent 4b22f80a77
commit 9d2ac9e235
7 changed files with 56 additions and 82 deletions
--- a/src/prolog/write.rs
+++ b/src/prolog/write.rs
@@ -164,7 +164,6 @@ impl fmt::Display for HeapCellValue {
 impl fmt::Display for DBRef {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
-            &DBRef::BuiltInPred(ref name, arity, _) =>  write!(f, "db_ref:builtin:{}/{}", name, arity),
            &DBRef::NamedPred(ref name, arity, _) =>    write!(f, "db_ref:named:{}/{}", name, arity),
            &DBRef::Op(priority, spec, ref name, ..) => write!(f, "db_ref:op({}, {}, {})", priority,
                                                               spec, name)