1 // RUN: %clang_cc1 -std=c++1z -fcoroutines-ts -verify %s -fcxx-exceptions -fexceptions -triple x86_64-windows-msvc -fms-extensions
2 namespace std::experimental {
3 template <typename... T> struct coroutine_traits;
4 
5 template <class Promise = void> struct coroutine_handle {
6   coroutine_handle() = default;
7   static coroutine_handle from_address(void *) noexcept;
8 };
9 template <> struct coroutine_handle<void> {
10   static coroutine_handle from_address(void *) noexcept;
11   coroutine_handle() = default;
12   template <class PromiseType>
13   coroutine_handle(coroutine_handle<PromiseType>) noexcept;
14 };
15 }
16 
17 struct suspend_always {
18   bool await_ready() noexcept;
19   void await_suspend(std::experimental::coroutine_handle<>) noexcept;
20   void await_resume() noexcept;
21 };
22 
23 template <> struct std::experimental::coroutine_traits<void> {
24   struct promise_type {
25     void get_return_object() noexcept;
26     suspend_always initial_suspend() noexcept;
27     suspend_always final_suspend() noexcept;
28     void return_void() noexcept;
29     void unhandled_exception() noexcept;
30   };
31 };
32 
SEH_used()33 void SEH_used() {
34   __try { // expected-error {{cannot use SEH '__try' in a coroutine when C++ exceptions are enabled}}
35     co_return; // expected-note {{function is a coroutine due to use of 'co_return' here}}
36   } __except(0) {}
37 }
38