1 // RUN: %clang_cc1 -std=c++11 %s -verify
2 
3 struct string;
4 namespace std {
5   using size_t = decltype(sizeof(int));
6 }
7 
8 void operator "" _km(long double); // ok
9 string operator "" _i18n(const char*, std::size_t); // ok
10 template<char...> int operator "" \u03C0(); // ok, UCN for lowercase pi // expected-warning {{reserved}}
11 float operator ""E(const char *); // expected-error {{invalid suffix on literal}} expected-warning {{reserved}}
12 float operator " " B(const char *); // expected-error {{must be '""'}} expected-warning {{reserved}}
13 string operator "" 5X(const char *, std::size_t); // expected-error {{expected identifier}}
14 double operator "" _miles(double); // expected-error {{parameter}}
15 template<char...> int operator "" j(const char*); // expected-error {{parameter}}
16 
17 float operator ""_E(const char *);
18