1 // This file is to test the mixed use of `std::experimental::coroutine*` and `std::coroutine*`
2 // wouldn't make the compiler to crash and emit the diagnostic message correctly.
3 // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s
4 
5 #include "Inputs/std-coroutine-exp-namespace.h"
6 #include "Inputs/std-coroutine.h" // Second
7 
8 struct my_awaitable {
9   bool await_ready() noexcept;
10   void await_suspend(std::experimental::coroutine_handle<> coro) noexcept;
11   void await_resume() noexcept;
12 };
13 
14 struct promise_void {
15   void get_return_object();
16   my_awaitable initial_suspend();
17   my_awaitable final_suspend() noexcept;
18   void return_void();
19   void unhandled_exception();
20 };
21 
22 template <>
23 struct std::coroutine_traits<void> { using promise_type = promise_void; };
24 
test()25 void test() {
26   co_return; // expected-error {{mixed use of std and std::experimental namespaces for coroutine components}}
27   // expected-warning@-1{{support for std::experimental::coroutine_traits will be removed}}
28   // expected-note@Inputs/std-coroutine-exp-namespace.h:8 {{'coroutine_traits' declared here}}
29   // expected-note@Inputs/std-coroutine.h:8 {{'coroutine_traits' declared here}}
30 }
31