28 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s -triple=x86_64-linux-gnu2 3using size_t = decltype(sizeof(int));4namespace std {5 struct string {};6}7 8template<typename T, typename U> struct same_type;9template<typename T> struct same_type<T, T> {};10 11namespace std_example {12 13long double operator ""_w(long double);14std::string operator ""_w(const char16_t*, size_t);15unsigned operator ""_w(const char*);16int main() {17 auto v1 = 1.2_w; // calls operator""_w(1.2L)18 auto v2 = u"one"_w; // calls operator""_w(u"one", 3)19 auto v3 = 12_w; // calls operator""_w("12")20 "two"_w; // expected-error {{no matching literal operator for call to 'operator""_w' with arguments of types 'const char *' and '__size_t' (aka 'unsigned long')}}21 22 same_type<decltype(v1), long double> test1;23 same_type<decltype(v2), std::string> test2;24 same_type<decltype(v3), unsigned> test3;25}26 27}28