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1 | // Copyright Kevlin Henney, 2000-2005. |
2 | // Copyright Alexander Nasonov, 2006-2010. | |
3 | // Copyright Antony Polukhin, 2011-2014. | |
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_WIDEST_CHAR_HPP | |
19 | #define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP | |
20 | ||
21 | #include <boost/config.hpp> | |
22 | #ifdef BOOST_HAS_PRAGMA_ONCE | |
23 | # pragma once | |
24 | #endif | |
25 | ||
26 | namespace boost { namespace detail { | |
27 | ||
28 | template <typename TargetChar, typename SourceChar> | |
29 | struct widest_char { | |
30 | typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c< | |
31 | (sizeof(TargetChar) > sizeof(SourceChar)) | |
32 | , TargetChar | |
33 | , SourceChar | |
34 | >::type type; | |
35 | }; | |
36 | ||
37 | }} // namespace boost::detail | |
38 | ||
39 | #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP | |
40 |