Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: /// \file regex_traits.hpp
Chris@16: /// Includes the C regex traits or the CPP regex traits header file depending on the
Chris@16: /// BOOST_XPRESSIVE_USE_C_TRAITS macro.
Chris@16: //
Chris@16: //  Copyright 2008 Eric Niebler. Distributed under the Boost
Chris@16: //  Software License, Version 1.0. (See accompanying file
Chris@16: //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
Chris@16: #define BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
Chris@16: 
Chris@16: // MS compatible compilers support #pragma once
Chris@101: #if defined(_MSC_VER)
Chris@16: # pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/type_traits/is_convertible.hpp>
Chris@16: #include <boost/xpressive/detail/detail_fwd.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_XPRESSIVE_USE_C_TRAITS
Chris@16: # include <boost/xpressive/traits/c_regex_traits.hpp>
Chris@16: #else
Chris@16: # include <boost/xpressive/traits/cpp_regex_traits.hpp>
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost { namespace xpressive
Chris@16: {
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // regex_traits_version_1_tag
Chris@16: /// Tag used to denote that a traits class conforms to the version 1 traits
Chris@16: /// interface.
Chris@16: struct regex_traits_version_1_tag
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // regex_traits_version_2_tag
Chris@16: /// Tag used to denote that a traits class conforms to the version 2 traits
Chris@16: /// interface.
Chris@16: struct regex_traits_version_2_tag
Chris@16:   : regex_traits_version_1_tag
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // regex_traits_version_1_case_fold_tag DEPRECATED use has_fold_case trait
Chris@16: /// INTERNAL ONLY
Chris@16: ///
Chris@16: struct regex_traits_version_1_case_fold_tag
Chris@16:   : regex_traits_version_1_tag
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // has_fold_case
Chris@16: /// Trait used to denote that a traits class has the fold_case member function.
Chris@16: template<typename Traits>
Chris@16: struct has_fold_case
Chris@16:   : is_convertible<
Chris@16:         typename Traits::version_tag *
Chris@16:       , regex_traits_version_1_case_fold_tag *
Chris@16:     >
Chris@16: {
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // regex_traits
Chris@16: /// Thin wrapper around the default regex_traits implementation, either
Chris@16: /// cpp_regex_traits or c_regex_traits
Chris@16: ///
Chris@16: template<typename Char, typename Impl>
Chris@16: struct regex_traits
Chris@16:   : Impl
Chris@16: {
Chris@16:     typedef typename Impl::locale_type locale_type;
Chris@16: 
Chris@16:     regex_traits()
Chris@16:       : Impl()
Chris@16:     {
Chris@16:     }
Chris@16: 
Chris@16:     explicit regex_traits(locale_type const &loc)
Chris@16:       : Impl(loc)
Chris@16:     {
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // lookup_classname
Chris@16: /// INTERNAL ONLY
Chris@16: template<typename Traits, std::size_t N>
Chris@16: inline typename Traits::char_class_type
Chris@16: lookup_classname(Traits const &traits, char const (&cname)[N], bool icase)
Chris@16: {
Chris@16:     typename Traits::char_type name[N] = {0};
Chris@16:     for(std::size_t j = 0; j < N-1; ++j)
Chris@16:     {
Chris@16:         name[j] = traits.widen(cname[j]);
Chris@16:     }
Chris@16:     return traits.lookup_classname(name, name + N - 1, icase);
Chris@16: }
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif