Class Template `mode_of`

Description

Metafunction returning a mode tag corresponding the the mode of a model of one of the Filter or Device concepts.

Headers

<boost/iostreams/traits.hpp>

Reference

Synopsis

namespaceboost {namespaceiostreams {template<typename[T](#template_params)>structmode_of {typedefsee below[type](#type);
};

} }// End namespace boost::io

Template parameters

| T | - | A Model of one of the Filter or Device concepts |

`mode_of::type`

typedefimplementation-defined[type](#type);

The most-derived mode tag to which category_of<T>::type is convertible. If there is no such most-derived tag, a compile-time error occurs.

Modes assigned to standard library types are displayed in the following table.

`T`	`category`
Specialization of `std::basic_iostream`, or derived from such a specialization	`seekable`
Specialization of `std::basic_istream`, or derived from such a specialization	`input_seekable`
Specialization of `std::basic_ostream`, or derived from such a specialization	`output_seekable`
Specialization of `std::basic_streambuf`, or derived from such a specialization	`seekable`
Specialization of `std::back_insert_iterator`, or derived from such a specialization	`output`

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

Class Template mode_of