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 -verify %s
// expected-no-diagnostics
template<typename T>
concept C = (f(T()), true);
template<typename T>
constexpr bool foo() { return false; }
template<typename T>
requires (f(T()), true)
constexpr bool foo() requires (f(T()), true) { return true; }
namespace a {
struct A {};
constexpr void f(A a) {}
}
static_assert(C<a::A>);
static_assert(foo<a::A>());
namespace a {
// This makes calls to f ambiguous, but the second check will still succeed
// because the constraint satisfaction results are cached.
constexpr void f(A a, int = 2) {}
}
static_assert(C<a::A>);
static_assert(foo<a::A>());
|
