# std::coroutine_handle<Promise>::from_promise

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< cpp‎ | coroutine‎ | coroutine handle

static coroutine_handle from_promise( Promise& p ); |  | (since C++20)

Creates a `coroutine_handle` from the promise object of a coroutine. The created `coroutine_handle` refers the coroutine, and promise() returns a reference to `p`.

The behavior is undefined if `p` is not a reference to a promise object. This function is only provided for the primary template, i.e. specializations std::coroutine_handle<> and std::coroutine_handle<std::noop_coroutine_promise> do not have this function.

### Parameters

p | - | promise object of a coroutine to refer

### Return value

A `coroutine_handle` referring the given coroutine.

### Example

| This section is incomplete Reason: no example

### See also

(constructor) (C++20) | constructs a `coroutine_handle` object (public member function)
from_address [static] (C++20) | imports a coroutine from a pointer (public static member function)
noop_coroutine (C++20) | creates a coroutine handle that has no observable effects when resumed or destroyed (function)

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