17 Language support library [support]

17.12 Coroutines [support.coroutine]

17.12.4 Class template coroutine_handle [coroutine.handle]

17.12.4.2 Construct/reset [coroutine.handle.con]

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constexpr coroutine_handle() noexcept; constexpr coroutine_handle(nullptr_t) noexcept;
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Postconditions: address() == nullptr.
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static coroutine_handle from_promise(Promise& p);
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Preconditions: p is a reference to a promise object of a coroutine.
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Postconditions: addressof(h.promise()) == addressof(p).
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Returns: A coroutine handle h referring to the coroutine.
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coroutine_handle& operator=(nullptr_t) noexcept;
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Postconditions: address() == nullptr.
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Returns: *this.