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ba15d186e5
During the ISO C++ Committee meeting plenary session the C++23 Standard has been voted as technical complete. This updates the reference to c++2b to c++23 and updates the __cplusplus macro. Drive-by fixes c++1z -> c++17 and c++2a -> c++20 when seen. Reviewed By: aaron.ballman Differential Revision: https://reviews.llvm.org/D149553
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// RUN: %clang_cc1 -std=c++20 -verify %s
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// RUN: %clang_cc1 -std=c++23 -verify %s
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namespace PR52905 {
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template <class> concept C = true;
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struct A {
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int begin();
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int begin() const;
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};
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template <class T>
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concept Beginable = requires (T t) {
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{ t.begin } -> C;
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// expected-note@-1 {{because 't.begin' would be invalid: reference to non-static member function must be called}}
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};
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static_assert(Beginable<A>); // expected-error {{static assertion failed}}
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// expected-note@-1 {{does not satisfy 'Beginable'}}
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} // namespace PR52905
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namespace PR52909a {
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template<class> constexpr bool B = true;
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template<class T> concept True = B<T>;
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template <class T>
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int foo(T t) requires requires { // expected-note {{candidate template ignored: constraints not satisfied}}
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{t.begin} -> True; // expected-note {{because 't.begin' would be invalid: reference to non-static member function must be called}}
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}
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{}
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struct A { int begin(); };
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auto x = foo(A()); // expected-error {{no matching function for call to 'foo'}}
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} // namespace PR52909a
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namespace PR52909b {
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template<class> concept True = true;
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template<class T> concept C = requires {
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{ T::begin } -> True; // expected-note {{because 'T::begin' would be invalid: reference to overloaded function could not be resolved}}
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};
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struct A {
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static void begin(int);
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static void begin(double);
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};
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static_assert(C<A>); // expected-error {{static assertion failed}}
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// expected-note@-1 {{because 'A' does not satisfy 'C'}}
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} // namespace PR52909b
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namespace PR53075 {
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template<class> concept True = true;
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template<class T> concept C = requires {
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{ &T::f } -> True; // expected-note {{because '&T::f' would be invalid: reference to overloaded function could not be resolved}}
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};
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struct S {
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int *f();
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int *f() const;
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};
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static_assert(C<S>); // expected-error {{static assertion failed}}
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// expected-note@-1 {{because 'S' does not satisfy 'C'}}
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} // namespace PR53075
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