Test template instantiation of pack expansions where the parameter pack is in...

Test template instantiation of pack expansions where the parameter pack is in a nested-name-specifier

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122282 91177308-0d34-0410-b5e6-96231b3b80d8

test/CXX/temp/temp.decls/temp.variadic/p4.cpp

 // RUN: %clang_cc1 -std=c++0x -fsyntax-only -verify %s
 
-template<typename... Types> struct Tuple;
+template<typename... Types> struct tuple;
 
 // FIXME: Many more bullets to go
 
 // In a template-argument-list (14.3); the pattern is a template-argument.
 template<typename ...Types>
 struct tuple_of_refs {
-  typedef Tuple<Types& ...> types;
+  typedef tuple<Types& ...> types;
 };
 
-Tuple<int&, float&> *t_int_ref_float_ref;
+tuple<int&, float&> *t_int_ref_float_ref;
 tuple_of_refs<int&, float&>::types *t_int_ref_float_ref_2 =  t_int_ref_float_ref;
 
+template<typename ...Types>
+struct extract_nested_types {
+  typedef tuple<typename Types::type...> types;
+};
+
+template<typename T>
+struct identity {
+  typedef T type;
+};
+
+tuple<int, float> *t_int_float;
+extract_nested_types<identity<int>, identity<float> >::types *t_int_float_2 
+  = t_int_float;