clang/test/SemaCXX/coroutine-mixed3-exp-namespace.cpp

   1 // RUN: %clang_cc1 -verify -std=c++20 -fsyntax-only %s
   2
   3 #include "Inputs/std-coroutine.h"
   4
   5 namespace std::experimental {
   6 using std::coroutine_handle;
   7 using std::coroutine_traits; // expected-note{{declared here}}
   8 } // namespace std::experimental
   9
  10 struct my_awaitable {
  11   bool await_ready() noexcept;
  12   void await_suspend(std::coroutine_handle<> coro) noexcept;
  13   void await_resume() noexcept;
  14 };
  15
  16 struct promise_void {
  17   void get_return_object();
  18   my_awaitable initial_suspend();
  19   my_awaitable final_suspend() noexcept;
  20   void return_void();
  21   void unhandled_exception();
  22 };
  23
  24 template <>
  25 struct std::coroutine_traits<void> { using promise_type = promise_void; };
  26
  27 void test() {
  28   co_return;
  29   // expected-warning@-1{{support for std::experimental::coroutine_traits will be removed}}
  30 }