| // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
| |
| template <typename T, typename U = void*> |
| struct A { |
| enum { |
| id = _Generic(T(), // expected-error {{controlling expression type 'char' not compatible with any generic association type}} |
| int: 1, // expected-note {{compatible type 'int' specified here}} |
| float: 2, |
| U: 3) // expected-error {{type 'int' in generic association compatible with previously specified type 'int'}} |
| }; |
| }; |
| |
| static_assert(A<int>::id == 1, "fail"); |
| static_assert(A<float>::id == 2, "fail"); |
| static_assert(A<double, double>::id == 3, "fail"); |
| |
| A<char> a1; // expected-note {{in instantiation of template class 'A<char, void *>' requested here}} |
| A<short, int> a2; // expected-note {{in instantiation of template class 'A<short, int>' requested here}} |
| |
| template <typename T, typename U> |
| struct B { |
| enum { |
| id = _Generic(T(), |
| int: 1, // expected-note {{compatible type 'int' specified here}} |
| int: 2, // expected-error {{type 'int' in generic association compatible with previously specified type 'int'}} |
| U: 3) |
| }; |
| }; |
| |
| template <unsigned Arg, unsigned... Args> struct Or { |
| enum { result = Arg | Or<Args...>::result }; |
| }; |
| |
| template <unsigned Arg> struct Or<Arg> { |
| enum { result = Arg }; |
| }; |
| |
| template <class... Args> struct TypeMask { |
| enum { |
| result = Or<_Generic(Args(), int: 1, long: 2, short: 4, float: 8)...>::result |
| }; |
| }; |
| |
| static_assert(TypeMask<int, long, short>::result == 7, "fail"); |
| static_assert(TypeMask<float, short>::result == 12, "fail"); |
| static_assert(TypeMask<int, float, float>::result == 9, "fail"); |