gcc/testsuite/g++.dg/coroutines/pr95345.C

   1 #if __has_include (<coroutine>)
   2 #include <coroutine>
   3 using namespace std;
   4 #elif defined (__clang__) && __has_include (<experimental/coroutine>)
   5 #include <experimental/coroutine>
   6 using namespace std::experimental;
   7 #endif
   8
   9 struct dummy_coro
  10 {
  11   using promise_type = dummy_coro;
  12   bool await_ready() { return false; }
  13   void await_suspend(std::coroutine_handle<>) { }
  14   void await_resume() { }
  15   dummy_coro get_return_object() { return {}; }
  16   dummy_coro initial_suspend() { return {}; }
  17   dummy_coro final_suspend() { return {}; }
  18   void return_void() { }
  19   void unhandled_exception() { }
  20 };
  21
  22 template <int ...I>
  23 dummy_coro
  24 foo()
  25 {
  26  ((co_await [](int){ return std::suspend_never{}; }(I)), ...);
  27   co_return;
  28 }
  29
  30 void bar() {
  31   foo<1>();
  32 }