char_alt_traits.hpp

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/* /////////////////////////////////////////////////////////////////////////
 * File:        stlsoft/string/char_alt_traits.hpp (originally stlsoft_char_alt_traits.h)
 *
 * Purpose:     char_alt_traits traits class.
 *
 * Created:     19th November 1998
 * Updated:     10th June 2006
 *
 * Home:        http://stlsoft.org/
 *
 * Copyright (c) 1998-2006, Matthew Wilson and Synesis Software
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
 *   any contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * ////////////////////////////////////////////////////////////////////// */


/** \file stlsoft/string/char_alt_traits.hpp
 *
 * \brief [C++ only] Definition of the stlsoft::char_alt_traits traits
 *  class.
 *  (\ref group__library__string "String" Library.)
 */

#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS
#define STLSOFT_INCL_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS

#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
# define STLSOFT_VER_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS_MAJOR    4
# define STLSOFT_VER_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS_MINOR    0
# define STLSOFT_VER_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS_REVISION 1
# define STLSOFT_VER_STLSOFT_STRING_HPP_CHAR_ALT_TRAITS_EDIT     30
#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

/* /////////////////////////////////////////////////////////////////////////
 * Includes
 */

#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
# include <stlsoft/stlsoft.h>
#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */

/* /////////////////////////////////////////////////////////////////////////
 * Namespace
 */

#ifndef _STLSOFT_NO_NAMESPACE
namespace stlsoft
{
#endif /* _STLSOFT_NO_NAMESPACE */

/* /////////////////////////////////////////////////////////////////////////
 * Constraints
 */

#ifdef STLSOFT_DOCUMENTATION_SKIP_SECTION
/** \brief Traits for determining the alternate character type
 *
 * char_alt_traits is a traits class for acquiring the opposite character type
 * eg. char_alt_traits<char>::alt_char_type == wchar_t, and vice versa
 *
 * \param C The char type
 *
 * \ingroup group__library__string
 */
template <class C>
struct char_alt_traits
{
    typedef C               char_type;      //!< The char type
    typedef not C           alt_char_type;  //!< The alternatve char type
};

#else /* ? STLSOFT_DOCUMENTATION_SKIP_SECTION */

template <class C>
struct char_alt_traits;

STLSOFT_TEMPLATE_SPECIALISATION
struct char_alt_traits<ss_char_a_t>
{
    typedef ss_char_a_t     char_type;
    typedef ss_char_w_t     alt_char_type;
};

STLSOFT_TEMPLATE_SPECIALISATION
struct char_alt_traits<ss_char_w_t>
{
    typedef ss_char_w_t     char_type;
    typedef ss_char_a_t     alt_char_type;
};

#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

/* ////////////////////////////////////////////////////////////////////// */

#ifndef _STLSOFT_NO_NAMESPACE
} // namespace stlsoft
#endif /* _STLSOFT_NO_NAMESPACE */

/* ////////////////////////////////////////////////////////////////////// */

#endif /* !STLSOFT_INCL_STLSOFT_HPP_STRING_CHAR_ALT_TRAITS */

/* ////////////////////////////////////////////////////////////////////// */