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diff --git a/gcc/rust/resolve/rust-ast-resolve-implitem.h b/gcc/rust/resolve/rust-ast-resolve-implitem.h
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+// 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_IMPLITEM_H
+#define RUST_AST_RESOLVE_IMPLITEM_H
+
+#include "rust-ast-resolve-base.h"
+#include "rust-ast-resolve-type.h"
+#include "rust-ast-full.h"
+
+namespace Rust {
+namespace Resolver {
+
+class ResolveToplevelImplItem : public ResolverBase
+{
+public:
+  static void go (AST::InherentImplItem *item, AST::Type *base)
+  {
+    ResolveToplevelImplItem resolver (base);
+    item->accept_vis (resolver);
+  };
+
+  void visit (AST::ConstantItem &constant)
+  {
+    std::string identifier
+      = base->as_string () + "::" + constant.get_identifier ();
+    resolver->get_name_scope ().insert (identifier, constant.get_node_id (),
+					constant.get_locus ());
+    resolver->insert_new_definition (constant.get_node_id (),
+				     Definition{constant.get_node_id (),
+						constant.get_node_id ()});
+  }
+
+  void visit (AST::Function &function)
+  {
+    std::string identifier
+      = base->as_string () + "::" + function.get_function_name ();
+    resolver->get_name_scope ().insert (identifier, function.get_node_id (),
+					function.get_locus ());
+    resolver->insert_new_definition (function.get_node_id (),
+				     Definition{function.get_node_id (),
+						function.get_node_id ()});
+  }
+
+  void visit (AST::Method &method)
+  {
+    std::string identifier
+      = base->as_string () + "::" + method.get_method_name ();
+    resolver->get_name_scope ().insert (identifier, method.get_node_id (),
+					method.get_locus ());
+    resolver->insert_new_definition (method.get_node_id (),
+				     Definition{method.get_node_id (),
+						method.get_node_id ()});
+  }
+
+private:
+  ResolveToplevelImplItem (AST::Type *base)
+    : ResolverBase (UNKNOWN_NODEID), base (base)
+  {}
+
+  AST::Type *base;
+};
+
+} // namespace Resolver
+} // namespace Rust
+
+#endif // RUST_AST_RESOLVE_IMPLITEM_H