ceph/src/boost/boost/xpressive/regex_traits.hpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 /// \file regex_traits.hpp
   3 /// Includes the C regex traits or the CPP regex traits header file depending on the
   4 /// BOOST_XPRESSIVE_USE_C_TRAITS macro.
   5 //
   6 //  Copyright 2008 Eric Niebler. Distributed under the Boost
   7 //  Software License, Version 1.0. (See accompanying file
   8 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9
  10 #ifndef BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
  11 #define BOOST_XPRESSIVE_REGEX_TRAITS_HPP_EAN_10_04_2005
  12
  13 // MS compatible compilers support #pragma once
  14 #if defined(_MSC_VER)
  15 # pragma once
  16 #endif
  17
  18 #include <boost/type_traits/is_convertible.hpp>
  19 #include <boost/xpressive/detail/detail_fwd.hpp>
  20
  21 #ifdef BOOST_XPRESSIVE_USE_C_TRAITS
  22 # include <boost/xpressive/traits/c_regex_traits.hpp>
  23 #else
  24 # include <boost/xpressive/traits/cpp_regex_traits.hpp>
  25 #endif
  26
  27 namespace boost { namespace xpressive
  28 {
  29
  30 ///////////////////////////////////////////////////////////////////////////////
  31 // regex_traits_version_1_tag
  32 /// Tag used to denote that a traits class conforms to the version 1 traits
  33 /// interface.
  34 struct regex_traits_version_1_tag
  35 {
  36 };
  37
  38 ///////////////////////////////////////////////////////////////////////////////
  39 // regex_traits_version_2_tag
  40 /// Tag used to denote that a traits class conforms to the version 2 traits
  41 /// interface.
  42 struct regex_traits_version_2_tag
  43   : regex_traits_version_1_tag
  44 {
  45 };
  46
  47 ///////////////////////////////////////////////////////////////////////////////
  48 // regex_traits_version_1_case_fold_tag DEPRECATED use has_fold_case trait
  49 /// INTERNAL ONLY
  50 ///
  51 struct regex_traits_version_1_case_fold_tag
  52   : regex_traits_version_1_tag
  53 {
  54 };
  55
  56 ///////////////////////////////////////////////////////////////////////////////
  57 // has_fold_case
  58 /// Trait used to denote that a traits class has the fold_case member function.
  59 template<typename Traits>
  60 struct has_fold_case
  61   : is_convertible<
  62         typename Traits::version_tag *
  63       , regex_traits_version_1_case_fold_tag *
  64     >
  65 {
  66 };
  67
  68 ///////////////////////////////////////////////////////////////////////////////
  69 // regex_traits
  70 /// Thin wrapper around the default regex_traits implementation, either
  71 /// cpp_regex_traits or c_regex_traits
  72 ///
  73 template<typename Char, typename Impl>
  74 struct regex_traits
  75   : Impl
  76 {
  77     typedef typename Impl::locale_type locale_type;
  78
  79     regex_traits()
  80       : Impl()
  81     {
  82     }
  83
  84     explicit regex_traits(locale_type const &loc)
  85       : Impl(loc)
  86     {
  87     }
  88 };
  89
  90 ///////////////////////////////////////////////////////////////////////////////
  91 // lookup_classname
  92 /// INTERNAL ONLY
  93 template<typename Traits, std::size_t N>
  94 inline typename Traits::char_class_type
  95 lookup_classname(Traits const &traits, char const (&cname)[N], bool icase)
  96 {
  97     typename Traits::char_type name[N] = {0};
  98     for(std::size_t j = 0; j < N-1; ++j)
  99     {
 100         name[j] = traits.widen(cname[j]);
 101     }
 102     return traits.lookup_classname(name, name + N - 1, icase);
 103 }
 104
 105 }}
 106
 107 #endif