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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
#include <experimental/coroutine>
namespace coro = std::experimental;
struct A {
using promise_type = A*;
};
struct B {};
struct C {};
namespace std { namespace experimental {
template <>
struct coroutine_traits<::A, int> {
using promise_type = int*;
};
template <class ...Args>
struct coroutine_traits<::B, Args...> {
using promise_type = B*;
};
template <>
struct coroutine_traits<::C> {
using promise_type = void;
};
}}
template <class Expect, class T, class ...Args>
void check_type() {
using P = typename coro::coroutine_traits<T, Args...>::promise_type ;
static_assert(std::is_same<P, Expect>::value, "");
};
int main()
{
check_type<A*, A>();
check_type<int*, A, int>();
check_type<B*, B>();
check_type<void, C>();
}
|
