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1 // Copyright Kevlin Henney, 2000-2005.
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2 // Copyright Alexander Nasonov, 2006-2010.
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3 // Copyright Antony Polukhin, 2011-2014.
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4 //
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5 // Distributed under the Boost Software License, Version 1.0. (See
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6 // accompanying file LICENSE_1_0.txt or copy at
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7 // http://www.boost.org/LICENSE_1_0.txt)
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8 //
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9 // what: lexical_cast custom keyword cast
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10 // who: contributed by Kevlin Henney,
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11 // enhanced with contributions from Terje Slettebo,
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12 // with additional fixes and suggestions from Gennaro Prota,
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13 // Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
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14 // Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
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15 // Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
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16 // when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
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17
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18 #ifndef BOOST_LEXICAL_CAST_INCLUDED
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19 #define BOOST_LEXICAL_CAST_INCLUDED
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20
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21 #include <boost/config.hpp>
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22 #ifdef BOOST_HAS_PRAGMA_ONCE
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23 # pragma once
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24 #endif
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25
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26 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
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27 #define BOOST_LCAST_NO_WCHAR_T
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28 #endif
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29
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30 #include <boost/range/iterator_range_core.hpp>
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31 #include <boost/lexical_cast/bad_lexical_cast.hpp>
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32 #include <boost/lexical_cast/try_lexical_convert.hpp>
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33
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34 namespace boost
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35 {
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36 template <typename Target, typename Source>
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37 inline Target lexical_cast(const Source &arg)
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38 {
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39 Target result;
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40
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41 if (!boost::conversion::detail::try_lexical_convert(arg, result)) {
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42 boost::conversion::detail::throw_bad_cast<Source, Target>();
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43 }
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44
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45 return result;
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46 }
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47
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48 template <typename Target>
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49 inline Target lexical_cast(const char* chars, std::size_t count)
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50 {
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51 return ::boost::lexical_cast<Target>(
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52 ::boost::iterator_range<const char*>(chars, chars + count)
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53 );
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54 }
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55
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56 template <typename Target>
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57 inline Target lexical_cast(const unsigned char* chars, std::size_t count)
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58 {
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59 return ::boost::lexical_cast<Target>(
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60 ::boost::iterator_range<const unsigned char*>(chars, chars + count)
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61 );
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62 }
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63
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64 template <typename Target>
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65 inline Target lexical_cast(const signed char* chars, std::size_t count)
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66 {
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67 return ::boost::lexical_cast<Target>(
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68 ::boost::iterator_range<const signed char*>(chars, chars + count)
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69 );
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70 }
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71
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72 #ifndef BOOST_LCAST_NO_WCHAR_T
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73 template <typename Target>
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74 inline Target lexical_cast(const wchar_t* chars, std::size_t count)
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75 {
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76 return ::boost::lexical_cast<Target>(
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77 ::boost::iterator_range<const wchar_t*>(chars, chars + count)
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78 );
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79 }
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80 #endif
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81 #ifndef BOOST_NO_CXX11_CHAR16_T
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82 template <typename Target>
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83 inline Target lexical_cast(const char16_t* chars, std::size_t count)
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84 {
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85 return ::boost::lexical_cast<Target>(
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86 ::boost::iterator_range<const char16_t*>(chars, chars + count)
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87 );
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88 }
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89 #endif
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90 #ifndef BOOST_NO_CXX11_CHAR32_T
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91 template <typename Target>
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92 inline Target lexical_cast(const char32_t* chars, std::size_t count)
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93 {
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94 return ::boost::lexical_cast<Target>(
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95 ::boost::iterator_range<const char32_t*>(chars, chars + count)
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96 );
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97 }
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98 #endif
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99
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100 } // namespace boost
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101
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102 #undef BOOST_LCAST_NO_WCHAR_T
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103
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104 #endif // BOOST_LEXICAL_CAST_INCLUDED
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105
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