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 |
108 | |