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std::coroutine_handle<Promise>::coroutine_handle

From cppreference.com
 
 
Utilities library
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std::coroutine_handle
Member functions
coroutine_handle::coroutine_handle
(C++20)
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(C++20)(C++20)
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constexpr coroutine_handle() noexcept;
(1) (since C++20)
constexpr coroutine_handle( std::nullptr_t ) noexcept;
(2) (since C++20)
coroutine_handle( const coroutine_handle& other ) = default;
(3) (since C++20)
coroutine_handle( coroutine_handle&& other ) = default;
(4) (since C++20)

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

1-2) Initializes the underlying address 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.

[edit] Parameters

other - another coroutine_handle to copy

[edit] 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.

[edit] See also

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