### is_async_operation

The `is_async_operation` trait detects whether a type `T` and arguments `Args`... may be used to initiate an asynchronous operation.

    template<
        typename T,
        typename... Args>
    struct is_async_operation

Class template `is_async_operation` is a trait is derived from `true_type` if the expression `T(Args..., token)` initiates an asynchronous operation, where `token` is an unspecified completion token type. Otherwise, `is_async_operation` is derived from `false_type`.

##### Requirements

Header: `asio/async_result.hpp`

Convenience header: `asio.hpp`