[coroutine.handle.noop.observers]

# 17 Language support library [[support]](./#support)

## 17.13 Coroutines [[support.coroutine]](support.coroutine#coroutine.handle.noop.observers)

### 17.13.5 No-op coroutines [[coroutine.noop]](coroutine.noop#coroutine.handle.noop.observers)

#### 17.13.5.2 Class coroutine_handle<noop_coroutine_promise> [[coroutine.handle.noop]](coroutine.handle.noop#observers)

#### 17.13.5.2.3 Observers [coroutine.handle.noop.observers]

[ð](#lib:operator_bool,coroutine_handle%3cnoop_coroutine_promise%3e)

`constexpr explicit operator bool() const noexcept;
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L6219)

*Returns*: true[.](#1.sentence-1)

[ð](#lib:done,coroutine_handle%3cnoop_coroutine_promise%3e)

`constexpr bool done() const noexcept;
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/support.tex#L6230)

*Returns*: false[.](#2.sentence-1)
