#### experimental::parallel_group::signature

The completion signature for the group of operations.

    typedef detail::parallel_group_signature< sizeof...(Ops), typename completion_signature_of< Ops >::type...>::type signature;

###### Types

Name | Description
--- | ---
type |

Class template `completion_signature_of` is a trait with a member type alias `type` that denotes the completion signature of the asynchronous operation initiated by the expression `T(Args..., token)` operation, where `token` is an unspecified completion token type. If the asynchronous operation does not have exactly one completion signature, the instantion of the trait is well-formed but the member type alias `type` is omitted. If the expression `T(Args..., token)` is not an asynchronous operation then use of the trait is ill-formed.

###### Requirements

Header: `asio/experimental/parallel_group.hpp`

Convenience header: None