1 // Copyright Kevlin Henney, 2000-2005.
2 // Copyright Alexander Nasonov, 2006-2010.
3 // Copyright Antony Polukhin, 2011-2014.
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)
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
18 #ifndef BOOST_LEXICAL_CAST_INCLUDED
19 #define BOOST_LEXICAL_CAST_INCLUDED
21 #include <boost/config.hpp>
22 #ifdef BOOST_HAS_PRAGMA_ONCE
26 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
27 #define BOOST_LCAST_NO_WCHAR_T
30 #include <boost/range/iterator_range_core.hpp>
31 #include <boost/lexical_cast/bad_lexical_cast.hpp>
32 #include <boost/lexical_cast/try_lexical_convert.hpp>
33 #include <boost/utility/value_init.hpp>
37 template <typename Target, typename Source>
38 inline Target lexical_cast(const Source &arg)
40 boost::value_initialized<Target> result;
42 if (!boost::conversion::detail::try_lexical_convert(arg, get(result))) {
43 boost::conversion::detail::throw_bad_cast<Source, Target>();
49 template <typename Target>
50 inline Target lexical_cast(const char* chars, std::size_t count)
52 return ::boost::lexical_cast<Target>(
53 ::boost::iterator_range<const char*>(chars, chars + count)
57 template <typename Target>
58 inline Target lexical_cast(const unsigned char* chars, std::size_t count)
60 return ::boost::lexical_cast<Target>(
61 ::boost::iterator_range<const unsigned char*>(chars, chars + count)
65 template <typename Target>
66 inline Target lexical_cast(const signed char* chars, std::size_t count)
68 return ::boost::lexical_cast<Target>(
69 ::boost::iterator_range<const signed char*>(chars, chars + count)
73 #ifndef BOOST_LCAST_NO_WCHAR_T
74 template <typename Target>
75 inline Target lexical_cast(const wchar_t* chars, std::size_t count)
77 return ::boost::lexical_cast<Target>(
78 ::boost::iterator_range<const wchar_t*>(chars, chars + count)
82 #ifndef BOOST_NO_CXX11_CHAR16_T
83 template <typename Target>
84 inline Target lexical_cast(const char16_t* chars, std::size_t count)
86 return ::boost::lexical_cast<Target>(
87 ::boost::iterator_range<const char16_t*>(chars, chars + count)
91 #ifndef BOOST_NO_CXX11_CHAR32_T
92 template <typename Target>
93 inline Target lexical_cast(const char32_t* chars, std::size_t count)
95 return ::boost::lexical_cast<Target>(
96 ::boost::iterator_range<const char32_t*>(chars, chars + count)
103 #undef BOOST_LCAST_NO_WCHAR_T
105 #endif // BOOST_LEXICAL_CAST_INCLUDED