p7.cpp revision c50ffca69af980af021384e087a81ae2ff7b9e26 
1// RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s -triple=x86_64-linux-gnu
2
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 '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