1 // Copyright Kevlin Henney, 2000-2005. 2 // Copyright Alexander Nasonov, 2006-2010. 3 // Copyright Antony Polukhin, 2011-2019. 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_INCLUDED 19 #define BOOST_LEXICAL_CAST_INCLUDED 20 21 #include <boost/config.hpp> 22 #ifdef BOOST_HAS_PRAGMA_ONCE 23 # pragma once 24 #endif 25 26 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING) 27 #define BOOST_LCAST_NO_WCHAR_T 28 #endif 29 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 34 namespace boost 35 { 36 template <typename Target, typename Source> lexical_cast(const Source & arg)37 inline Target lexical_cast(const Source &arg) 38 { 39 Target result = Target(); 40 41 if (!boost::conversion::detail::try_lexical_convert(arg, result)) { 42 boost::conversion::detail::throw_bad_cast<Source, Target>(); 43 } 44 45 return result; 46 } 47 48 template <typename Target> lexical_cast(const char * chars,std::size_t count)49 inline Target lexical_cast(const char* chars, std::size_t count) 50 { 51 return ::boost::lexical_cast<Target>( 52 ::boost::iterator_range<const char*>(chars, chars + count) 53 ); 54 } 55 56 template <typename Target> lexical_cast(const unsigned char * chars,std::size_t count)57 inline Target lexical_cast(const unsigned char* chars, std::size_t count) 58 { 59 return ::boost::lexical_cast<Target>( 60 ::boost::iterator_range<const unsigned char*>(chars, chars + count) 61 ); 62 } 63 64 template <typename Target> lexical_cast(const signed char * chars,std::size_t count)65 inline Target lexical_cast(const signed char* chars, std::size_t count) 66 { 67 return ::boost::lexical_cast<Target>( 68 ::boost::iterator_range<const signed char*>(chars, chars + count) 69 ); 70 } 71 72 #ifndef BOOST_LCAST_NO_WCHAR_T 73 template <typename Target> lexical_cast(const wchar_t * chars,std::size_t count)74 inline Target lexical_cast(const wchar_t* chars, std::size_t count) 75 { 76 return ::boost::lexical_cast<Target>( 77 ::boost::iterator_range<const wchar_t*>(chars, chars + count) 78 ); 79 } 80 #endif 81 #ifndef BOOST_NO_CXX11_CHAR16_T 82 template <typename Target> lexical_cast(const char16_t * chars,std::size_t count)83 inline Target lexical_cast(const char16_t* chars, std::size_t count) 84 { 85 return ::boost::lexical_cast<Target>( 86 ::boost::iterator_range<const char16_t*>(chars, chars + count) 87 ); 88 } 89 #endif 90 #ifndef BOOST_NO_CXX11_CHAR32_T 91 template <typename Target> lexical_cast(const char32_t * chars,std::size_t count)92 inline Target lexical_cast(const char32_t* chars, std::size_t count) 93 { 94 return ::boost::lexical_cast<Target>( 95 ::boost::iterator_range<const char32_t*>(chars, chars + count) 96 ); 97 } 98 #endif 99 100 } // namespace boost 101 102 #undef BOOST_LCAST_NO_WCHAR_T 103 104 #endif // BOOST_LEXICAL_CAST_INCLUDED 105 106