Class Template mode_of

Description
Headers
Reference

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

namespace boost { namespace iostreams {

template<typename T>
struct mode_of {
    typedef see below type;
};

} } // End namespace boost::io

Template parameters

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

mode_of::type

    typedef implementation-defined 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.

Tcategory
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

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© Copyright 2004-2007 Jonathan Turkanis

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)