| // RUN: %clang_cc1 -std=c++2a -x c++ %s -verify |
| |
| template<auto T, decltype(T) U> |
| concept C1 = sizeof(U) >= 4; |
| // sizeof(U) >= 4 [U = U (decltype(T))] |
| |
| template<typename Y, char V> |
| concept C2 = C1<Y{}, V>; |
| // sizeof(U) >= 4 [U = V (decltype(Y{}))] |
| |
| template<char W> |
| constexpr int foo() requires C2<int, W> { return 1; } |
| // sizeof(U) >= 4 [U = W (decltype(int{}))] |
| |
| template<char X> |
| // expected-note@+1{{candidate function}} |
| constexpr int foo() requires C1<1, X> && true { return 2; } |
| // sizeof(U) >= 4 [U = X (decltype(1))] |
| |
| static_assert(foo<'a'>() == 2); |
| |
| template<char Z> |
| // expected-note@+1{{candidate function}} |
| constexpr int foo() requires C2<long long, Z> && true { return 3; } |
| // sizeof(U) >= 4 [U = Z (decltype(long long{}))] |
| |
| static_assert(foo<'a'>() == 3); |
| // expected-error@-1{{call to 'foo' is ambiguous}} |
