boost/regex/v4/regex_traits.hpp

   1 /*
   2  *
   3  * Copyright (c) 2003
   4  * John Maddock
   5  *
   6  * Use, modification and distribution are subject to the
   7  * Boost 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  */
  11
  12  /*
  13   *   LOCATION:    see http://www.boost.org for most recent version.
  14   *   FILE         regex_traits.hpp
  15   *   VERSION      see <boost/version.hpp>
  16   *   DESCRIPTION: Declares regular expression traits classes.
  17   */
  18
  19 #ifndef BOOST_REGEX_TRAITS_HPP_INCLUDED
  20 #define BOOST_REGEX_TRAITS_HPP_INCLUDED
  21
  22 #ifndef BOOST_REGEX_CONFIG_HPP
  23 #include <boost/regex/config.hpp>
  24 #endif
  25 #ifndef BOOST_REGEX_WORKAROUND_HPP
  26 #include <boost/regex/v4/regex_workaround.hpp>
  27 #endif
  28 #ifndef BOOST_REGEX_SYNTAX_TYPE_HPP
  29 #include <boost/regex/v4/syntax_type.hpp>
  30 #endif
  31 #ifndef BOOST_REGEX_ERROR_TYPE_HPP
  32 #include <boost/regex/v4/error_type.hpp>
  33 #endif
  34 #ifndef BOOST_REGEX_TRAITS_DEFAULTS_HPP_INCLUDED
  35 #include <boost/regex/v4/regex_traits_defaults.hpp>
  36 #endif
  37 #ifndef BOOST_NO_STD_LOCALE
  38 #  ifndef BOOST_CPP_REGEX_TRAITS_HPP_INCLUDED
  39 #     include <boost/regex/v4/cpp_regex_traits.hpp>
  40 #  endif
  41 #endif
  42 #if !BOOST_WORKAROUND(__BORLANDC__, < 0x560)
  43 #  ifndef BOOST_C_REGEX_TRAITS_HPP_INCLUDED
  44 #     include <boost/regex/v4/c_regex_traits.hpp>
  45 #  endif
  46 #endif
  47 #if defined(_WIN32) && !defined(BOOST_REGEX_NO_W32)
  48 #  ifndef BOOST_W32_REGEX_TRAITS_HPP_INCLUDED
  49 #     include <boost/regex/v4/w32_regex_traits.hpp>
  50 #  endif
  51 #endif
  52 #ifndef BOOST_REGEX_FWD_HPP_INCLUDED
  53 #include <boost/regex_fwd.hpp>
  54 #endif
  55
  56 #include "boost/mpl/has_xxx.hpp"
  57 #include <boost/static_assert.hpp>
  58
  59 #ifdef BOOST_MSVC
  60 #pragma warning(push)
  61 #pragma warning(disable: 4103)
  62 #endif
  63 #ifdef BOOST_HAS_ABI_HEADERS
  64 #  include BOOST_ABI_PREFIX
  65 #endif
  66 #ifdef BOOST_MSVC
  67 #pragma warning(pop)
  68 #endif
  69
  70 namespace boost{
  71
  72 template <class charT, class implementationT >
  73 struct regex_traits : public implementationT
  74 {
  75    regex_traits() : implementationT() {}
  76 };
  77
  78 //
  79 // class regex_traits_wrapper.
  80 // this is what our implementation will actually store;
  81 // it provides default implementations of the "optional"
  82 // interfaces that we support, in addition to the
  83 // required "standard" ones:
  84 //
  85 namespace re_detail{
  86 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !BOOST_WORKAROUND(__HP_aCC, < 60000)
  87 BOOST_MPL_HAS_XXX_TRAIT_DEF(boost_extensions_tag)
  88 #else
  89 template<class T>
  90 struct has_boost_extensions_tag
  91 {
  92    BOOST_STATIC_CONSTANT(bool, value = false);
  93 };
  94 #endif
  95
  96 template <class BaseT>
  97 struct default_wrapper : public BaseT
  98 {
  99    typedef typename BaseT::char_type char_type;
 100    std::string error_string(::boost::regex_constants::error_type e)const
 101    {
 102       return ::boost::re_detail::get_default_error_string(e);
 103    }
 104    ::boost::regex_constants::syntax_type syntax_type(char_type c)const
 105    {
 106       return ((c & 0x7f) == c) ? get_default_syntax_type(static_cast<char>(c)) : ::boost::regex_constants::syntax_char;
 107    }
 108    ::boost::regex_constants::escape_syntax_type escape_syntax_type(char_type c)const
 109    {
 110       return ((c & 0x7f) == c) ? get_default_escape_syntax_type(static_cast<char>(c)) : ::boost::regex_constants::escape_type_identity;
 111    }
 112    int toi(const char_type*& p1, const char_type* p2, int radix)const
 113    {
 114       return ::boost::re_detail::global_toi(p1, p2, radix, *this);
 115    }
 116    char_type translate(char_type c, bool icase)const
 117    {
 118       return (icase ? this->translate_nocase(c) : this->translate(c));
 119    }
 120    char_type translate(char_type c)const
 121    {
 122       return BaseT::translate(c);
 123    }
 124    char_type tolower(char_type c)const
 125    {
 126       return ::boost::re_detail::global_lower(c);
 127    }
 128    char_type toupper(char_type c)const
 129    {
 130       return ::boost::re_detail::global_upper(c);
 131    }
 132 };
 133
 134 template <class BaseT, bool has_extensions>
 135 struct compute_wrapper_base
 136 {
 137    typedef BaseT type;
 138 };
 139 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !BOOST_WORKAROUND(__HP_aCC, < 60000)
 140 template <class BaseT>
 141 struct compute_wrapper_base<BaseT, false>
 142 {
 143    typedef default_wrapper<BaseT> type;
 144 };
 145 #else
 146 template <>
 147 struct compute_wrapper_base<c_regex_traits<char>, false>
 148 {
 149    typedef default_wrapper<c_regex_traits<char> > type;
 150 };
 151 #ifndef BOOST_NO_WREGEX
 152 template <>
 153 struct compute_wrapper_base<c_regex_traits<wchar_t>, false>
 154 {
 155    typedef default_wrapper<c_regex_traits<wchar_t> > type;
 156 };
 157 #endif
 158 #endif
 159
 160 } // namespace re_detail
 161
 162 template <class BaseT>
 163 struct regex_traits_wrapper
 164    : public ::boost::re_detail::compute_wrapper_base<
 165                BaseT,
 166                ::boost::re_detail::has_boost_extensions_tag<BaseT>::value
 167             >::type
 168 {
 169    regex_traits_wrapper(){}
 170 private:
 171    regex_traits_wrapper(const regex_traits_wrapper&);
 172    regex_traits_wrapper& operator=(const regex_traits_wrapper&);
 173 };
 174
 175 } // namespace boost
 176
 177 #ifdef BOOST_MSVC
 178 #pragma warning(push)
 179 #pragma warning(disable: 4103)
 180 #endif
 181 #ifdef BOOST_HAS_ABI_HEADERS
 182 #  include BOOST_ABI_SUFFIX
 183 #endif
 184 #ifdef BOOST_MSVC
 185 #pragma warning(pop)
 186 #endif
 187
 188 #endif // include
 189