test/strings/basic.string/test_traits.h - third_party/libcxx - Git at Google

 #ifndef TEST_TRAITS_H
 #define TEST_TRAITS_H

 template <class charT>
 struct test_traits
 {
     typedef charT     char_type;
 };

 #endif
	#ifndef TEST_TRAITS_H
	#define TEST_TRAITS_H

	template <class charT>
	struct test_traits
	{
	typedef charT char_type;
	};

	#endif