char_traits
The class template boost::iostreams::char_traits is a derived class of std::char_traits which has an additional static function would_block, used to indicate that an attempt to read a character has failed because no input is currently available.
The constants WOULD_BLOCK and WWOULD_BLOCK are provided for convenience.
<boost/iostreams/char_traits.hpp>namespace boost { namespace iostreams { const int WOULD_BLOCK; const std::wint_t WWOULD_BLOCK; template<typename Ch> class char_traits : public std::char_traits<Ch> { static typename std::char_traits<Ch>::int_type would_block(); }; } } // End namespace boost::io
WOULD_BLOCKconst int WOULD_BLOCK;
The return value of char_traits<char>::would_block. Used by the function template get to indicate that no character could be returned because input was temporarily unavailable.
WWOULD_BLOCK const std::wint_t WWOULD_BLOCK;
The return value of char_traits<wchar_t>::would_block. Used by the function template get to indicate that no character could be returned because input was temporarily unavailable.
boost::iostreams::char_traits| Ch | - | The character type |
char_traits::would_blockstatic typename std::char_traits<Ch>::int_type would_block();
Returns an instance of int_type used by the function template get to indicate that an attempt to read a character from a Source has failed because no input is currently available. Future attempts to read a character may succeed.
Revised 02 Feb 2008
© Copyright 2008 CodeRage, LLC
© 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)