#### allocator_binder::argument_type

The type of the function's argument.

    typedef see_below argument_type;

The type of `argument_type` is based on the type `T` of the wrapper's target object:

- if `T` is a pointer to a function type accepting a single argument, `argument_type` is a synonym for the return type of `T`;
- if `T` is a class type with a member type `argument_type`, then `argument_type` is a synonym for `T::argument_type`;
- otherwise `argument_type` is not defined.

###### Requirements

Header: `asio/bind_allocator.hpp`

Convenience header: `asio.hpp`