introduce a better binding scheme for attributed variables

2019-02-03 15:16:30 -07:00
parent f51405bc04
commit 3cfbbb23a3
9 changed files with 122 additions and 105 deletions
--- a/src/prolog/heap_iter.rs
+++ b/src/prolog/heap_iter.rs
@@ -65,8 +65,7 @@ impl<'a> HCPreOrderIterator<'a> {

                da
            },
-            Addr::HeapCell(_) | Addr::StackCell(_, _) => da,
-            Addr::AttrVar(h, _) => self.follow_heap(h + 1),
+            Addr::AttrVar(_) | Addr::HeapCell(_) | Addr::StackCell(_, _) => da,
            Addr::Str(s) => self.follow_heap(s) // record terms of structure.
        }
    }