1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 // UNSUPPORTED: c++98, c++03, c++11 12 13 #include <experimental/coroutine> 14 15 namespace coro = std::experimental; 16 17 struct A { 18 using promise_type = A*; 19 }; 20 21 struct B {}; 22 struct C {}; 23 24 namespace std { namespace experimental { 25 template <> 26 struct coroutine_traits<::A, int> { 27 using promise_type = int*; 28 }; 29 template <class ...Args> 30 struct coroutine_traits<::B, Args...> { 31 using promise_type = B*; 32 }; 33 template <> 34 struct coroutine_traits<::C> { 35 using promise_type = void; 36 }; 37 }} 38 39 template <class Expect, class T, class ...Args> 40 void check_type() { 41 using P = typename coro::coroutine_traits<T, Args...>::promise_type ; 42 static_assert(std::is_same<P, Expect>::value, ""); 43 }; 44 45 int main() 46 { 47 check_type<A*, A>(); 48 check_type<int*, A, int>(); 49 check_type<B*, B>(); 50 check_type<void, C>(); 51 } 52
