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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_DETAIL_COMMON_HPP |
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12 #define BOOST_RANGE_DETAIL_COMMON_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 #include <boost/range/detail/sfinae.hpp> |
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20 #include <boost/type_traits/is_void.hpp> |
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21 #include <boost/type_traits/detail/ice_or.hpp> |
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22 #include <boost/mpl/if.hpp> |
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23 #include <boost/mpl/int.hpp> |
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24 #include <cstddef> |
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25 |
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26 ////////////////////////////////////////////////////////////////////////////// |
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27 // missing partial specialization workaround. |
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28 ////////////////////////////////////////////////////////////////////////////// |
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29 |
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30 namespace boost |
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31 { |
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32 namespace range_detail |
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33 { |
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34 // 1 = std containers |
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35 // 2 = std::pair |
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36 // 3 = const std::pair |
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37 // 4 = array |
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38 // 5 = const array |
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39 // 6 = char array |
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40 // 7 = wchar_t array |
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41 // 8 = char* |
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42 // 9 = const char* |
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43 // 10 = whar_t* |
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44 // 11 = const wchar_t* |
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45 // 12 = string |
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46 |
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47 typedef mpl::int_<1>::type std_container_; |
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48 typedef mpl::int_<2>::type std_pair_; |
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49 typedef mpl::int_<3>::type const_std_pair_; |
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50 typedef mpl::int_<4>::type array_; |
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51 typedef mpl::int_<5>::type const_array_; |
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52 typedef mpl::int_<6>::type char_array_; |
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53 typedef mpl::int_<7>::type wchar_t_array_; |
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54 typedef mpl::int_<8>::type char_ptr_; |
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55 typedef mpl::int_<9>::type const_char_ptr_; |
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56 typedef mpl::int_<10>::type wchar_t_ptr_; |
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57 typedef mpl::int_<11>::type const_wchar_t_ptr_; |
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58 typedef mpl::int_<12>::type string_; |
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59 |
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60 template< typename C > |
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61 struct range_helper |
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62 { |
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63 static C* c; |
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64 static C ptr; |
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65 |
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66 BOOST_STATIC_CONSTANT( bool, is_pair_ = sizeof( boost::range_detail::is_pair_impl( c ) ) == sizeof( yes_type ) ); |
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67 BOOST_STATIC_CONSTANT( bool, is_char_ptr_ = sizeof( boost::range_detail::is_char_ptr_impl( ptr ) ) == sizeof( yes_type ) ); |
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68 BOOST_STATIC_CONSTANT( bool, is_const_char_ptr_ = sizeof( boost::range_detail::is_const_char_ptr_impl( ptr ) ) == sizeof( yes_type ) ); |
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69 BOOST_STATIC_CONSTANT( bool, is_wchar_t_ptr_ = sizeof( boost::range_detail::is_wchar_t_ptr_impl( ptr ) ) == sizeof( yes_type ) ); |
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70 BOOST_STATIC_CONSTANT( bool, is_const_wchar_t_ptr_ = sizeof( boost::range_detail::is_const_wchar_t_ptr_impl( ptr ) ) == sizeof( yes_type ) ); |
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71 BOOST_STATIC_CONSTANT( bool, is_char_array_ = sizeof( boost::range_detail::is_char_array_impl( ptr ) ) == sizeof( yes_type ) ); |
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72 BOOST_STATIC_CONSTANT( bool, is_wchar_t_array_ = sizeof( boost::range_detail::is_wchar_t_array_impl( ptr ) ) == sizeof( yes_type ) ); |
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73 BOOST_STATIC_CONSTANT( bool, is_string_ = (boost::type_traits::ice_or<is_const_char_ptr_, is_const_wchar_t_ptr_>::value )); |
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74 BOOST_STATIC_CONSTANT( bool, is_array_ = boost::is_array<C>::value ); |
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75 |
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76 }; |
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77 |
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78 template< typename C > |
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79 class range |
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80 { |
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81 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_pair_, |
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82 boost::range_detail::std_pair_, |
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83 void >::type pair_t; |
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84 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_array_, |
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85 boost::range_detail::array_, |
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86 pair_t >::type array_t; |
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87 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_string_, |
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88 boost::range_detail::string_, |
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89 array_t >::type string_t; |
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90 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_const_char_ptr_, |
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91 boost::range_detail::const_char_ptr_, |
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92 string_t >::type const_char_ptr_t; |
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93 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_char_ptr_, |
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94 boost::range_detail::char_ptr_, |
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95 const_char_ptr_t >::type char_ptr_t; |
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96 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_const_wchar_t_ptr_, |
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97 boost::range_detail::const_wchar_t_ptr_, |
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98 char_ptr_t >::type const_wchar_ptr_t; |
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99 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_wchar_t_ptr_, |
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100 boost::range_detail::wchar_t_ptr_, |
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101 const_wchar_ptr_t >::type wchar_ptr_t; |
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102 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_wchar_t_array_, |
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103 boost::range_detail::wchar_t_array_, |
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104 wchar_ptr_t >::type wchar_array_t; |
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105 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::range_detail::range_helper<C>::is_char_array_, |
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106 boost::range_detail::char_array_, |
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107 wchar_array_t >::type char_array_t; |
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108 public: |
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109 typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< ::boost::is_void<char_array_t>::value, |
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110 boost::range_detail::std_container_, |
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111 char_array_t >::type type; |
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112 }; // class 'range' |
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113 } |
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114 } |
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115 |
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116 #endif |
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117 |