| 1 | // This file contains references to sections of the Coroutines TS, which can be |
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| 2 | // found at http://wg21.link/coroutines. |
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| 3 | |
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| 4 | // RUN: %clang_cc1 -std=c++14 -fcoroutines-ts -verify %s -fcxx-exceptions -fexceptions -Wunused-result |
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| 5 | |
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| 6 | namespace std { |
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| 7 | namespace experimental { |
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| 8 | |
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| 9 | template<typename ...T> |
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| 10 | struct coroutine_traits { |
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| 11 | struct promise_type {}; |
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| 12 | }; |
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| 13 | |
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| 14 | template<> struct coroutine_traits<void>; // expected-note {{forward declaration of 'std::experimental::coroutine_traits<void>'}} |
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| 15 | }} // namespace std::experimental |
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| 16 | |
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| 17 | void uses_forward_declaration() { |
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| 18 | co_return; // expected-error {{this function cannot be a coroutine: missing definition of specialization 'coroutine_traits<void>'}} |
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| 19 | } |
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| 20 | |
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