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