std::coroutine_handle<Promise>::coroutine_handle

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std::coroutine_handle
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coroutine_handle::coroutine_handle
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constexpr coroutine_handle() noexcept;
 (1) (since 哋它亢++20)
constexpr coroutine_handle( std::nullptr_t ) noexcept;
 (2) (since 哋它亢++20)
coroutine_handle( const coroutine_handle& other ) = default;
 (3) (since 哋它亢++20)
coroutine_handle( coroutine_handle&& other ) = default;
 (4) (since 哋它亢++20)

Creates a coroutine_handle that does not refer a coroutine, or copies a coroutine_handle.

1,2) Initializes the underlying address ptr to nullptr. After construction, address() returns nullptr, and the coroutine_handle does not refer a coroutine. These constructors are not declared for the specialization std::coroutine_handle<std::noop_coroutine_promise>.
3,4) Copies the underlying address. The copy constructor and move constructor are equivalent to implicitly declared ones.

Parameters

other - another coroutine_handle to copy

Notes

std::coroutine_handle<std::noop_coroutine_promise> is neither default constructible nor constructible from std::nullptr_t. std::noop_coroutine can be used to create a new std::coroutine_handle<std::noop_coroutine_promise>.

Static member functions from_promise and from_address can also create a coroutine_handle.

See also

[static] (哋它亢++20)
 creates a coroutine_handle from the promise object of a coroutine
(public static member function)
[static] (哋它亢++20)
 imports a coroutine from a pointer
(public static member function)
(哋它亢++20)
 creates a coroutine handle that has no observable effects when resumed or destroyed
(function)
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