1// Copyright Kevlin Henney, 2000-2005.
2// Copyright Alexander Nasonov, 2006-2010.
3// Copyright Antony Polukhin, 2011-2020.
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
34namespace boost
35{
36 template <typename Target, typename Source>
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>
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>
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>
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>
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>
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>
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

source code of include/boost/lexical_cast.hpp