From a24eb4ef63d5860a5a02f7532e56e84283782984 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 24 Aug 2009 18:55:03 +0000
Subject: [PATCH] Skip transparent contexts when performing C++ name lookup

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@79931 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/SemaLookup.cpp       | 3 +++
 test/SemaCXX/linkage-spec.cpp | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/lib/Sema/SemaLookup.cpp b/lib/Sema/SemaLookup.cpp
index c600f99a40..1d583cc391 100644
--- a/lib/Sema/SemaLookup.cpp
+++ b/lib/Sema/SemaLookup.cpp
@@ -755,6 +755,9 @@ Sema::CppLookupName(Scope *S, DeclarationName Name,
 
   for (; S; S = S->getParent()) {
     DeclContext *Ctx = static_cast<DeclContext *>(S->getEntity());
+    if (Ctx->isTransparentContext())
+      continue;
+
     assert(Ctx && Ctx->isFileContext() &&
            "We should have been looking only at file context here already.");
 
diff --git a/test/SemaCXX/linkage-spec.cpp b/test/SemaCXX/linkage-spec.cpp
index 864953e9f9..b4c72f557d 100644
--- a/test/SemaCXX/linkage-spec.cpp
+++ b/test/SemaCXX/linkage-spec.cpp
@@ -25,3 +25,11 @@ extern "C" int const bar;
 // <rdar://problem/6895431>
 extern "C" struct bar d;
 extern struct bar e;
+
+extern "C++" {
+  namespace N0 {
+    struct X0 {
+      int foo(int x) { return x; }
+    };
+  }
+}
\ No newline at end of file
-- 
2.40.0