clang/test/CXX/lex/lex.literal/lex.ext/p7.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -std=c++11 -verify %s -triple=x86_64-linux-gnu
   2
   3 using size_t = decltype(sizeof(int));
   4 namespace std {
   5   struct string {};
   6 }
   7
   8 template<typename T, typename U> struct same_type;
   9 template<typename T> struct same_type<T, T> {};
  10
  11 namespace std_example {
  12
  13 long double operator "" _w(long double);
  14 std::string operator "" _w(const char16_t*, size_t);
  15 unsigned operator "" _w(const char*);
  16 int 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 }