[Bug c++/99710] coroutines: co_yield and co_await should only be allowed in suspension context

[iains at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99710

--- Comment #2 from Iain Sandoe <iains at gcc dot gnu.org> ---
#include <coroutine>

struct task {
    struct promise_type {
        std::suspend_always initial_suspend();
        std::suspend_always final_suspend() noexcept;
        task get_return_object();
        void return_void();
        void unhandled_exception();
    };
};

task
my_coro ()
{
  try
    { }
  catch (...)
    {
      // [expr.await]
      co_await std::suspend_always{}; // { dg-error "We should have an error
here" }
    }
}