add trait_reference is_equal helper method

We need to be able to detect if trait references are equal which can be
based on the DefId mapping which takes into account crate and local defid

1 files changed, 7 insertions, 0 deletions

diff --git a/gcc/rust/typecheck/rust-hir-trait-ref.h b/gcc/rust/typecheck/rust-hir-trait-ref.h
index 9d16e36..c86892e 100644
--- a/gcc/rust/typecheck/rust-hir-trait-ref.h
+++ b/gcc/rust/typecheck/rust-hir-trait-ref.h
@@ -335,6 +335,13 @@ public:
       }
   }
 
+  bool is_equal (const TraitReference &other) const
+  {
+    DefId this_id = get_mappings ().get_defid ();
+    DefId other_id = other.get_mappings ().get_defid ();
+    return this_id == other_id;
+  }
+
 private:
   const HIR::Trait *hir_trait_ref;
   std::vector<TraitItemReference> item_refs;