1 files changed, 81 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-compile-resolve-path.cc b/gcc/rust/backend/rust-compile-resolve-path.cc
new file mode 100644
index 0000000..e6683fa
--- /dev/null
+++ b/gcc/rust/backend/rust-compile-resolve-path.cc
@@ -0,0 +1,81 @@
+// 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/>.
+
+#include "rust-linemap.h"
+#include "rust-backend.h"
+#include "rust-compile-resolve-path.h"
+#include "rust-compile-item.h"
+
+namespace Rust {
+namespace Compile {
+
+void
+ResolvePath::visit (HIR::PathInExpression &expr)
+{
+  // need to look up the reference for this identifier
+  NodeId ref_node_id;
+  if (!ctx->get_resolver ()->lookup_resolved_name (
+	expr.get_mappings ().get_nodeid (), &ref_node_id))
+    {
+      rust_fatal_error (expr.get_locus (), "failed to look up resolved name");
+      return;
+    }
+
+  printf ("PATHIN have ast node id %u ref %u for expr [%s]\n",
+	  expr.get_mappings ().get_nodeid (), ref_node_id,
+	  expr.as_string ().c_str ());
+
+  HirId ref;
+  if (!ctx->get_mappings ()->lookup_node_to_hir (
+	expr.get_mappings ().get_crate_num (), ref_node_id, &ref))
+    {
+      rust_fatal_error (expr.get_locus (), "reverse lookup failure");
+      return;
+    }
+
+  // assumes paths are functions for now
+  Bfunction *fn;
+  if (!ctx->lookup_function_decl (ref, &fn))
+    {
+      printf (
+	"path failed to lookup function attempting to forward resolve!\n");
+
+      // this might fail because its a forward decl so we can attempt to
+      // resolve it now
+      HIR::Item *resolved_item = ctx->get_mappings ()->lookup_hir_item (
+	expr.get_mappings ().get_crate_num (), ref);
+      if (resolved_item == nullptr)
+	{
+	  rust_fatal_error (expr.get_locus (), "failed to lookup forward decl");
+	  return;
+	}
+
+      CompileItem::compile (resolved_item, ctx);
+      if (!ctx->lookup_function_decl (ref, &fn))
+	{
+	  rust_fatal_error (expr.get_locus (), "forward decl was not compiled");
+	  return;
+	}
+    }
+
+  resolved
+    = ctx->get_backend ()->function_code_expression (fn, expr.get_locus ());
+}
+
+} // namespace Compile
+} // namespace Rust