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1 | // Copyright Kevlin Henney, 2000-2005. |
2 | // Copyright Alexander Nasonov, 2006-2010. | |
1e59de90 | 3 | // Copyright Antony Polukhin, 2011-2022. |
7c673cae FG |
4 | // |
5 | // Distributed under the Boost Software License, Version 1.0. (See | |
6 | // accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // what: lexical_cast custom keyword cast | |
10 | // who: contributed by Kevlin Henney, | |
11 | // enhanced with contributions from Terje Slettebo, | |
12 | // with additional fixes and suggestions from Gennaro Prota, | |
13 | // Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov, | |
14 | // Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann, | |
15 | // Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters | |
16 | // when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2014 | |
17 | ||
18 | #ifndef BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP | |
19 | #define BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP | |
20 | ||
21 | #include <boost/config.hpp> | |
22 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
23 | # pragma once | |
24 | #endif | |
25 | ||
92f5a8d4 | 26 | #include <boost/type_traits/integral_constant.hpp> |
7c673cae FG |
27 | #include <boost/type_traits/is_same.hpp> |
28 | ||
29 | namespace boost { | |
30 | ||
31 | namespace detail // is_character<...> | |
32 | { | |
33 | // returns true, if T is one of the character types | |
34 | template < typename T > | |
35 | struct is_character | |
36 | { | |
92f5a8d4 | 37 | typedef BOOST_DEDUCED_TYPENAME boost::integral_constant< |
f67539c2 TL |
38 | bool, |
39 | boost::is_same< T, char >::value || | |
7c673cae FG |
40 | #if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING) |
41 | boost::is_same< T, wchar_t >::value || | |
42 | #endif | |
43 | #ifndef BOOST_NO_CXX11_CHAR16_T | |
44 | boost::is_same< T, char16_t >::value || | |
45 | #endif | |
46 | #ifndef BOOST_NO_CXX11_CHAR32_T | |
47 | boost::is_same< T, char32_t >::value || | |
48 | #endif | |
f67539c2 TL |
49 | boost::is_same< T, unsigned char >::value || |
50 | boost::is_same< T, signed char >::value | |
7c673cae FG |
51 | > type; |
52 | ||
53 | BOOST_STATIC_CONSTANT(bool, value = (type::value) ); | |
54 | }; | |
55 | } | |
56 | } | |
57 | ||
58 | #endif // BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP | |
59 |