1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/rust/resolve/rust-ast-resolve-unused.h b/gcc/rust/resolve/rust-ast-resolve-unused.h
new file mode 100644
index 0000000..08b2db1
--- /dev/null
+++ b/gcc/rust/resolve/rust-ast-resolve-unused.h
@@ -0,0 +1,45 @@
+// Copyright (C) 2020 Free Software Foundation, Inc.
+
+// This file is part of GCC.
+
+// GCC is free software; you can redistribute it and/or modify it under
+// the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3, or (at your option) any later
+// version.
+
+// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+// for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GCC; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#ifndef RUST_AST_RESOLVE_UNUSED_H
+#define RUST_AST_RESOLVE_UNUSED_H
+
+#include "rust-ast-resolve-base.h"
+
+namespace Rust {
+namespace Resolver {
+
+class ScanUnused : public ResolverBase
+{
+public:
+  static void Scan (Rib *r)
+  {
+    r->iterate_decls ([&] (NodeId decl_node_id, Location locus) -> bool {
+      if (!r->have_references_for_node (decl_node_id))
+	{
+	  rust_warning_at (locus, 0, "unused name");
+	}
+      return true;
+    });
+  }
+};
+
+} // namespace Resolver
+} // namespace Rust
+
+#endif // RUST_AST_RESOLVE_UNUSED_H