# std::coroutine_handle<Promise>::operator bool

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< cpp‎ | coroutine‎ | coroutine handle

constexpr explicit operator bool() const noexcept; |  | (since C++20)

Checks whether *this is non-null, i.e. the value of *this is obtained from the promise object of some coroutine. Equivalent to return bool(address());.

If `Promise` is std::noop_coroutine_promise, this conversion function always returns true.

### Parameters

(none)

### Return value

bool(address()), or true if `Promise` is std::noop_coroutine_promise.

### See also

address (C++20) | exports the underlying address, i.e. the pointer backing the coroutine (public member function)

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