| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++14 %s |
| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++17 %s |
| // RUN: %clang_cc1 -fsyntax-only -verify -std=c++20 %s |
| |
| namespace std { |
| inline namespace __1 { |
| template<bool, class = void> struct enable_if {}; |
| template<class T> struct enable_if<true, T> { using type = T; }; |
| template<bool B, class T = void> using enable_if_t = typename enable_if<B, T>::type; |
| } |
| } |
| |
| namespace similar_to_user_code { |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T, class = std::enable_if_t<sizeof(T) != 1>> |
| void f(T, short); |
| |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T, std::enable_if_t<sizeof(T) != 1>* = nullptr> |
| void f(T, int); |
| |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T> |
| std::enable_if_t<sizeof(T) != 1, void> f(T, long); |
| |
| void test() { |
| f('x', 0); // expected-error{{no matching function}} |
| } |
| } |
| |
| namespace similar_to_libcxx_version_14 { |
| template<bool, class = void> struct enable_if {}; |
| template<class T> struct enable_if<true, T> { using type = T; }; |
| template<bool B, class T = void> using __enable_if_t = typename enable_if<B, T>::type; |
| |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T, class = __enable_if_t<sizeof(T) != 1>> |
| void f(T, short); |
| |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T, __enable_if_t<sizeof(T) != 1>* = nullptr> |
| void f(T, int); |
| |
| // expected-note@+2 {{candidate template ignored: requirement 'sizeof(char) != 1' was not satisfied [with T = char]}} |
| template<class T> |
| __enable_if_t<sizeof(T) != 1, void> f(T, long); |
| |
| void test() { |
| f('x', 0); // expected-error{{no matching function}} |
| } |
| } |
| |
| namespace similar_to_libcxx_version_13 { |
| template<bool> struct _MetaBase {}; |
| template<> struct _MetaBase<true> { template<class R> using _EnableIfImpl = R; }; |
| template<bool B, class T = void> using _EnableIf = typename _MetaBase<B>::template _EnableIfImpl<T>; |
| |
| // expected-note@+2 {{no member named '_EnableIfImpl'}} |
| template<class T, class = _EnableIf<sizeof(T) != 1>> |
| void f(T, short); |
| |
| // expected-note@+2 {{no member named '_EnableIfImpl'}} |
| template<class T, _EnableIf<sizeof(T) != 1>* = nullptr> |
| void f(T, int); |
| |
| // expected-note@+2 {{no member named '_EnableIfImpl'}} |
| template<class T> |
| _EnableIf<sizeof(T) != 1, void> f(T, long); |
| |
| void test() { |
| f('x', 0); // expected-error{{no matching function}} |
| } |
| } |
| |
| namespace not_all_names_are_magic { |
| template<bool, class = void> struct enable_if {}; |
| template<class T> struct enable_if<true, T> { using type = T; }; |
| template<bool B, class T = void> using a_pony = typename enable_if<B, T>::type; |
| |
| // expected-note@-2 {{candidate template ignored: disabled by 'enable_if' [with T = char]}} |
| template<class T, class = a_pony<sizeof(T) != 1>> |
| void f(T, short); |
| |
| // expected-note@-6 {{candidate template ignored: disabled by 'enable_if' [with T = char]}} |
| template<class T, a_pony<sizeof(T) != 1>* = nullptr> |
| void f(T, int); |
| |
| // expected-note@-10 {{candidate template ignored: disabled by 'enable_if' [with T = char]}} |
| template<class T> |
| a_pony<sizeof(T) != 1, void> f(T, long); |
| |
| void test() { |
| f('x', 0); // expected-error{{no matching function}} |
| } |
| } |