blob: 43d5d00c8cb2096d7f593894b7fab7973e7c7dc0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
// 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}}
|
