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145
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1 // { dg-additional-options "-fsyntax-only -w" }
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2
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3 #include "coro.h"
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4
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5 struct Coro {
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6 struct promise_type;
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7 using handle_type = coro::coroutine_handle<Coro::promise_type>;
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8 handle_type handle;
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9 Coro () : handle(0) {}
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10 Coro (handle_type _handle) : handle(_handle) {}
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11 Coro (Coro &&s) : handle(s.handle) { s.handle = nullptr; }
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12 Coro &operator = (Coro &&s) {
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13 handle = s.handle;
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14 s.handle = nullptr;
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15 return *this;
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16 }
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17 Coro (const Coro &) = delete;
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18 ~Coro() {
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19 if ( handle )
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20 handle.destroy();
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21 }
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22 struct promise_type {
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23 promise_type() {}
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24 ~promise_type() {}
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25 Coro get_return_object () { return Coro (handle_type::from_promise (*this)); }
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26 auto initial_suspend () { return coro::suspend_always{}; }
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27 auto final_suspend () { return coro::suspend_always{}; }
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28 void return_void () { }
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29 void unhandled_exception() { }
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30 };
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31 };
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32
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33 extern int x;
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34
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35 // Diagnose disallowed "return" in coroutine.
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36 Coro
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37 bar () // { dg-error {a 'return' statement is not allowed} }
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38 {
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39 if (x)
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40 return Coro();
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41 else
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42 co_return;
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43 }
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