Make UsingShadowDecls redeclarable. This fixes some visibility problems with

modules.

With this fixed, I no longer see any test regressions in the libc++ test suite
when enabling a single-module module.map for libc++ (other than issues with my
system headers).

llvm-svn: 193219

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/Modules/using-decl.cpp b/clang/test/Modules/using-decl.cpp
new file mode 100644
index 00000000000..4432738f060
--- /dev/null
+++ b/clang/test/Modules/using-decl.cpp
@@ -0,0 +1,8 @@
+// RUN: rm -rf %t
+// RUN: %clang_cc1 -x objective-c++ -fmodules -fmodules-cache-path=%t -I %S/Inputs %s -verify
+
+@import using_decl.a;
+
+// expected-no-diagnostics
+UsingDecl::using_decl_type x = UsingDecl::using_decl_var;
+UsingDecl::inner y = x;