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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 |