[task.overview]

# 33 Execution control library [[exec]](./#exec)

## 33.13 Coroutine utilities [[exec.coro.util]](exec.coro.util#task.overview)

### 33.13.6 execution​::​task [[exec.task]](exec.task#task.overview)

#### 33.13.6.1 task overview [task.overview]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/exec.tex#L7171)

The task class template represents a sender that can
be used as the return type of coroutines[.](#1.sentence-1)

The first template parameter T defines the type of the value
completion datum ([[exec.async.ops]](exec.async.ops "33.3 Asynchronous operations")) if T is not void[.](#1.sentence-2)

Otherwise, there are no value completion datums[.](#1.sentence-3)

Inside coroutines returning task<T, E> the operand ofco_return (if any) becomes the argument of set_value[.](#1.sentence-4)

The second template parameter Environment is used to customize
the behavior of task[.](#1.sentence-5)