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107 lines
3.0 KiB
107 lines
3.0 KiB
/////////////////////////////////////////////////////////////////////////////// |
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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) && (_MSC_VER >= 1020) |
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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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