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1 // Boost.Range library
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2 //
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3 // Copyright Thorsten Ottosen 2003-2004. Use, modification and
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4 // distribution is subject to the Boost Software License, Version
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5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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6 // http://www.boost.org/LICENSE_1_0.txt)
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7 //
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8 // For more information, see http://www.boost.org/libs/range/
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9 //
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10
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11 #ifndef BOOST_RANGE_BEGIN_HPP
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12 #define BOOST_RANGE_BEGIN_HPP
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13
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14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
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15 # pragma once
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16 #endif
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17
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18 #include <boost/range/config.hpp>
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19
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20 #ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
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21 #include <boost/range/detail/begin.hpp>
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22 #else
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23
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24 #include <boost/range/iterator.hpp>
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25
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26 namespace boost
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27 {
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28
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29 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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30 !BOOST_WORKAROUND(__GNUC__, < 3) \
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31 /**/
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32 namespace range_detail
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33 {
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34 #endif
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35
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36 //////////////////////////////////////////////////////////////////////
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37 // primary template
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38 //////////////////////////////////////////////////////////////////////
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39
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40 template< typename C >
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41 inline BOOST_DEDUCED_TYPENAME range_iterator<C>::type
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42 range_begin( C& c )
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43 {
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44 //
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45 // If you get a compile-error here, it is most likely because
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46 // you have not implemented range_begin() properly in
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47 // the namespace of C
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48 //
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49 return c.begin();
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50 }
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51
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52 //////////////////////////////////////////////////////////////////////
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53 // pair
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54 //////////////////////////////////////////////////////////////////////
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55
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56 template< typename Iterator >
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57 inline Iterator range_begin( const std::pair<Iterator,Iterator>& p )
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58 {
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59 return p.first;
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60 }
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61
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62 template< typename Iterator >
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63 inline Iterator range_begin( std::pair<Iterator,Iterator>& p )
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64 {
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65 return p.first;
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66 }
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67
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68 //////////////////////////////////////////////////////////////////////
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69 // array
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70 //////////////////////////////////////////////////////////////////////
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71
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72 //
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73 // May this be discarded? Or is it needed for bad compilers?
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74 //
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75 template< typename T, std::size_t sz >
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76 inline const T* range_begin( const T (&a)[sz] )
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77 {
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78 return a;
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79 }
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80
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81 template< typename T, std::size_t sz >
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82 inline T* range_begin( T (&a)[sz] )
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83 {
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84 return a;
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85 }
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86
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87
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88 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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89 !BOOST_WORKAROUND(__GNUC__, < 3) \
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90 /**/
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91 } // namespace 'range_detail'
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92 #endif
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93
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94 // Use a ADL namespace barrier to avoid ambiguity with other unqualified
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95 // calls. This is particularly important with C++0x encouraging
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96 // unqualified calls to begin/end.
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97 namespace range_adl_barrier
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98 {
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99
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100 template< class T >
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101 inline BOOST_DEDUCED_TYPENAME range_iterator<T>::type begin( T& r )
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102 {
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103 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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104 !BOOST_WORKAROUND(__GNUC__, < 3) \
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105 /**/
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106 using namespace range_detail;
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107 #endif
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108 return range_begin( r );
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109 }
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110
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111 template< class T >
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112 inline BOOST_DEDUCED_TYPENAME range_iterator<const T>::type begin( const T& r )
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113 {
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114 #if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) && \
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115 !BOOST_WORKAROUND(__GNUC__, < 3) \
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116 /**/
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117 using namespace range_detail;
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118 #endif
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119 return range_begin( r );
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120 }
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121
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122 } // namespace range_adl_barrier
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123 } // namespace boost
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124
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125 #endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
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126
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127 namespace boost
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128 {
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129 namespace range_adl_barrier
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130 {
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131 template< class T >
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132 inline BOOST_DEDUCED_TYPENAME range_iterator<const T>::type
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133 const_begin( const T& r )
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134 {
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135 return boost::range_adl_barrier::begin( r );
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136 }
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137 } // namespace range_adl_barrier
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138
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139 using namespace range_adl_barrier;
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140 } // namespace boost
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141
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142 #endif
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143
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