Consolidate and unify initializer list deduction

Summary:
This patch reduces duplication in the template argument deduction code
for handling deduction from initializer lists in a function call. This
extends the fix for PR12119 to also apply to the case where the
corresponding parameter is a trailing parameter pack.

Test Plan:
A test for deduction from nested initializer lists where the
corresponding parameter is a trailing parameter pack is added in
`clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp`.

Reviewers: fraggamuffin, rsmith

Reviewed By: rsmith

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D10681

llvm-svn: 240612

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp b/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
index a78f022e84c..9456dd713aa 100644
--- a/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
+++ b/clang/test/SemaCXX/cxx0x-initializer-stdinitializerlist.cpp
@@ -275,3 +275,10 @@ namespace TemporaryInitListSourceRange_PR22367 {
       {0}
       );
 }
+
+namespace ParameterPackNestedInitializerLists_PR23904c3 {
+  template <typename ...T>
+  void f(std::initializer_list<std::initializer_list<T>> ...tt);
+
+  void foo() { f({{0}}, {{'\0'}}); }
+}