1 // RUN: %clang_cc1 -std=c++11 %s -verify
2 
3 using size_t = decltype(sizeof(int));
4 template<char...> struct S {};
5 
6 template<char...> void operator "" _a();
7 template<char... C> S<C...> operator "" _a();
8 
9 template<typename T> struct U {
10   friend int operator "" _a(const char *, size_t);
11   // FIXME: It's not entirely clear whether this is intended to be legal.
12   friend U operator "" _a(const T *, size_t); // expected-error {{parameter}}
13 };
14 template<char...> struct V {
15   friend void operator "" _b(); // expected-error {{parameter}}
16 };
17 
18 template<char... C, int N = 0> void operator "" _b(); // expected-error {{parameter}}
19 template<char... C> void operator "" _b(int N = 0); // expected-error {{parameter}}
20 template<char, char...> void operator "" _b(); // expected-error {{parameter}}
21 template<typename T> T operator "" _b(const char *); // expected-error {{parameter}}
22 template<typename T> int operator "" _b(const T *, size_t); // expected-error {{parameter}}
23