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// This file contains references to sections of the Coroutines TS, which can be
// found at http://wg21.link/coroutines.
// RUN: %clang_cc1 -std=c++14 -fcoroutines-ts -verify %s -fcxx-exceptions -fexceptions -Wunused-result
namespace std {
namespace experimental {
template<typename ...T>
struct coroutine_traits {
struct promise_type {};
};
template<> struct coroutine_traits<void>; // expected-note {{forward declaration of 'std::experimental::coroutine_traits<void>'}}
}} // namespace std::experimental
void uses_forward_declaration() {
co_return; // expected-error {{this function cannot be a coroutine: missing definition of specialization 'coroutine_traits<void>'}}
}
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