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1 | // Boost.Range library |
2 | // | |
3 | // Copyright Thorsten Ottosen 2006. Use, modification and | |
4 | // distribution is subject to the Boost Software License, Version | |
5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | // For more information, see http://www.boost.org/libs/range/ | |
9 | // | |
10 | ||
11 | #ifndef BOOST_RANGE_AS_LITERAL_HPP | |
12 | #define BOOST_RANGE_AS_LITERAL_HPP | |
13 | ||
14 | #if defined(_MSC_VER) | |
15 | # pragma once | |
16 | #endif | |
17 | ||
18 | #ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING | |
19 | #include <boost/range/detail/as_literal.hpp> | |
20 | #else | |
21 | ||
22 | #include <boost/range/iterator_range.hpp> | |
23 | #include <boost/range/detail/str_types.hpp> | |
24 | ||
25 | #include <boost/detail/workaround.hpp> | |
26 | ||
27 | #include <cstring> | |
28 | #ifndef BOOST_NO_CWCHAR | |
29 | #include <cwchar> | |
30 | #endif | |
31 | ||
32 | namespace boost | |
33 | { | |
34 | namespace range_detail | |
35 | { | |
36 | inline std::size_t length( const char* s ) | |
37 | { | |
38 | return strlen( s ); | |
39 | } | |
40 | ||
41 | #ifndef BOOST_NO_CWCHAR | |
42 | inline std::size_t length( const wchar_t* s ) | |
43 | { | |
44 | return wcslen( s ); | |
45 | } | |
46 | #endif | |
47 | ||
48 | // | |
49 | // Remark: the compiler cannot choose between T* and T[sz] | |
50 | // overloads, so we must put the T* internal to the | |
51 | // unconstrained version. | |
52 | // | |
53 | ||
54 | inline bool is_char_ptr( char* ) | |
55 | { | |
56 | return true; | |
57 | } | |
58 | ||
59 | inline bool is_char_ptr( const char* ) | |
60 | { | |
61 | return true; | |
62 | } | |
63 | ||
64 | #ifndef BOOST_NO_CWCHAR | |
65 | inline bool is_char_ptr( wchar_t* ) | |
66 | { | |
67 | return true; | |
68 | } | |
69 | ||
70 | inline bool is_char_ptr( const wchar_t* ) | |
71 | { | |
72 | return true; | |
73 | } | |
74 | #endif | |
75 | ||
76 | template< class T > | |
77 | inline long is_char_ptr( const T& /* r */ ) | |
78 | { | |
79 | return 0L; | |
80 | } | |
81 | ||
82 | template< class T > | |
83 | inline iterator_range<T*> | |
84 | make_range( T* const r, bool ) | |
85 | { | |
86 | return iterator_range<T*>( r, r + length(r) ); | |
87 | } | |
88 | ||
89 | template< class T > | |
90 | inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<T>::type> | |
91 | make_range( T& r, long ) | |
92 | { | |
93 | return boost::make_iterator_range( r ); | |
94 | } | |
95 | ||
96 | } | |
97 | ||
98 | template< class Range > | |
99 | inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<Range>::type> | |
100 | as_literal( Range& r ) | |
101 | { | |
102 | return range_detail::make_range( r, range_detail::is_char_ptr(r) ); | |
103 | } | |
104 | ||
105 | template< class Range > | |
106 | inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type> | |
107 | as_literal( const Range& r ) | |
108 | { | |
109 | return range_detail::make_range( r, range_detail::is_char_ptr(r) ); | |
110 | } | |
111 | ||
112 | template< class Char, std::size_t sz > | |
113 | inline iterator_range<Char*> as_literal( Char (&arr)[sz] ) | |
114 | { | |
115 | return range_detail::make_range( arr, range_detail::is_char_ptr(arr) ); | |
116 | } | |
117 | ||
118 | template< class Char, std::size_t sz > | |
119 | inline iterator_range<const Char*> as_literal( const Char (&arr)[sz] ) | |
120 | { | |
121 | return range_detail::make_range( arr, range_detail::is_char_ptr(arr) ); | |
122 | } | |
123 | } | |
124 | ||
125 | #endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING | |
126 | ||
127 | #endif |