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1 | // char_traits.hpp |
2 | // Copyright (c) 2007-2009 Ben Hanson (http://www.benhanson.net/) | |
3 | // | |
4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | // file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | #ifndef BOOST_LEXER_CHAR_TRAITS_H | |
7 | #define BOOST_LEXER_CHAR_TRAITS_H | |
8 | ||
9 | // Make sure wchar_t is defined | |
10 | #include <string> | |
11 | ||
12 | namespace boost | |
13 | { | |
14 | namespace lexer | |
15 | { | |
16 | template<typename CharT> | |
17 | struct char_traits | |
18 | { | |
19 | typedef CharT char_type; | |
20 | typedef CharT index_type; | |
21 | ||
22 | static index_type call (CharT ch) | |
23 | { | |
24 | return ch; | |
25 | } | |
26 | }; | |
27 | ||
28 | template<> | |
29 | struct char_traits<char> | |
30 | { | |
31 | typedef char char_type; | |
32 | typedef unsigned char index_type; | |
33 | ||
34 | static index_type call (char ch) | |
35 | { | |
36 | return static_cast<index_type>(ch); | |
37 | } | |
38 | }; | |
39 | ||
40 | template<> | |
41 | struct char_traits<wchar_t> | |
42 | { | |
43 | typedef wchar_t char_type; | |
44 | typedef wchar_t index_type; | |
45 | ||
46 | static index_type call (wchar_t ch) | |
47 | { | |
48 | return ch; | |
49 | } | |
50 | }; | |
51 | } | |
52 | } | |
53 | ||
54 | #endif |