ceph/src/boost/libs/intrusive/include/boost/intrusive/detail/mpl.hpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga        2006-2014
   4 // (C) Copyright Microsoft Corporation  2014
   5 //
   6 // Distributed under the Boost Software License, Version 1.0.
   7 //    (See accompanying file LICENSE_1_0.txt or copy at
   8 //          http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10 // See http://www.boost.org/libs/intrusive for documentation.
  11 //
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef BOOST_INTRUSIVE_DETAIL_MPL_HPP
  15 #define BOOST_INTRUSIVE_DETAIL_MPL_HPP
  16
  17 #ifndef BOOST_CONFIG_HPP
  18 #  include <boost/config.hpp>
  19 #endif
  20
  21 #if defined(BOOST_HAS_PRAGMA_ONCE)
  22 #  pragma once
  23 #endif
  24
  25 #include <boost/intrusive/detail/config_begin.hpp>
  26 #include <boost/move/detail/type_traits.hpp>
  27 #include <cstddef>
  28
  29 namespace boost {
  30 namespace intrusive {
  31 namespace detail {
  32
  33 using boost::move_detail::is_same;
  34 using boost::move_detail::add_const;
  35 using boost::move_detail::remove_const;
  36 using boost::move_detail::remove_cv;
  37 using boost::move_detail::remove_reference;
  38 using boost::move_detail::add_reference;
  39 using boost::move_detail::remove_pointer;
  40 using boost::move_detail::add_pointer;
  41 using boost::move_detail::true_type;
  42 using boost::move_detail::false_type;
  43 using boost::move_detail::enable_if_c;
  44 using boost::move_detail::enable_if;
  45 using boost::move_detail::disable_if_c;
  46 using boost::move_detail::disable_if;
  47 using boost::move_detail::is_convertible;
  48 using boost::move_detail::if_c;
  49 using boost::move_detail::if_;
  50 using boost::move_detail::is_const;
  51 using boost::move_detail::identity;
  52 using boost::move_detail::alignment_of;
  53 using boost::move_detail::is_empty;
  54 using boost::move_detail::addressof;
  55 using boost::move_detail::integral_constant;
  56 using boost::move_detail::enable_if_convertible;
  57 using boost::move_detail::disable_if_convertible;
  58 using boost::move_detail::bool_;
  59 using boost::move_detail::true_;
  60 using boost::move_detail::false_;
  61 using boost::move_detail::yes_type;
  62 using boost::move_detail::no_type;
  63 using boost::move_detail::apply;
  64 using boost::move_detail::eval_if_c;
  65 using boost::move_detail::eval_if;
  66 using boost::move_detail::unvoid_ref;
  67 using boost::move_detail::add_const_if_c;
  68
  69 template<std::size_t S>
  70 struct ls_zeros
  71 {
  72    static const std::size_t value = (S & std::size_t(1)) ? 0 : (1 + ls_zeros<(S>>1u)>::value);
  73 };
  74
  75 template<>
  76 struct ls_zeros<0>
  77 {
  78    static const std::size_t value = 0;
  79 };
  80
  81 template<>
  82 struct ls_zeros<1>
  83 {
  84    static const std::size_t value = 0;
  85 };
  86
  87 // Infrastructure for providing a default type for T::TNAME if absent.
  88 #define BOOST_INTRUSIVE_INSTANTIATE_DEFAULT_TYPE_TMPLT(TNAME)     \
  89    template <typename T, typename DefaultType>                    \
  90    struct boost_intrusive_default_type_ ## TNAME                  \
  91    {                                                              \
  92       template <typename X>                                       \
  93       static char test(int, typename X::TNAME*);                  \
  94                                                                   \
  95       template <typename X>                                       \
  96       static int test(...);                                       \
  97                                                                   \
  98       struct DefaultWrap { typedef DefaultType TNAME; };          \
  99                                                                   \
 100       static const bool value = (1 == sizeof(test<T>(0, 0)));     \
 101                                                                   \
 102       typedef typename                                            \
 103          ::boost::intrusive::detail::if_c                         \
 104             <value, T, DefaultWrap>::type::TNAME type;            \
 105    };                                                             \
 106    //
 107
 108 #define BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_DEFAULT(INSTANTIATION_NS_PREFIX, T, TNAME, TIMPL)   \
 109       typename INSTANTIATION_NS_PREFIX                                                       \
 110          boost_intrusive_default_type_ ## TNAME< T, TIMPL >::type                            \
 111 //
 112
 113 #define BOOST_INTRUSIVE_INSTANTIATE_EVAL_DEFAULT_TYPE_TMPLT(TNAME)\
 114    template <typename T, typename DefaultType>                    \
 115    struct boost_intrusive_eval_default_type_ ## TNAME             \
 116    {                                                              \
 117       template <typename X>                                       \
 118       static char test(int, typename X::TNAME*);                  \
 119                                                                   \
 120       template <typename X>                                       \
 121       static int test(...);                                       \
 122                                                                   \
 123       struct DefaultWrap                                          \
 124       { typedef typename DefaultType::type TNAME; };              \
 125                                                                   \
 126       static const bool value = (1 == sizeof(test<T>(0, 0)));     \
 127                                                                   \
 128       typedef typename                                            \
 129          ::boost::intrusive::detail::eval_if_c                    \
 130             < value                                               \
 131             , ::boost::intrusive::detail::identity<T>             \
 132             , ::boost::intrusive::detail::identity<DefaultWrap>   \
 133             >::type::TNAME type;                                  \
 134    };                                                             \
 135 //
 136
 137 #define BOOST_INTRUSIVE_OBTAIN_TYPE_WITH_EVAL_DEFAULT(INSTANTIATION_NS_PREFIX, T, TNAME, TIMPL) \
 138       typename INSTANTIATION_NS_PREFIX                                                          \
 139          boost_intrusive_eval_default_type_ ## TNAME< T, TIMPL >::type                          \
 140 //
 141
 142 #define BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(TRAITS_PREFIX, TYPEDEF_TO_FIND) \
 143 template <class T>\
 144 struct TRAITS_PREFIX##_bool\
 145 {\
 146    template<bool Add>\
 147    struct two_or_three {yes_type _[2 + Add];};\
 148    template <class U> static yes_type test(...);\
 149    template <class U> static two_or_three<U::TYPEDEF_TO_FIND> test (int);\
 150    static const std::size_t value = sizeof(test<T>(0));\
 151 };\
 152 \
 153 template <class T>\
 154 struct TRAITS_PREFIX##_bool_is_true\
 155 {\
 156    static const bool value = TRAITS_PREFIX##_bool<T>::value > sizeof(yes_type)*2;\
 157 };\
 158 //
 159
 160 #define BOOST_INTRUSIVE_HAS_STATIC_MEMBER_FUNC_SIGNATURE(TRAITS_NAME, FUNC_NAME) \
 161   template <typename U, typename Signature> \
 162   class TRAITS_NAME \
 163   { \
 164   private: \
 165   template<Signature> struct helper;\
 166   template<typename T> \
 167   static ::boost::intrusive::detail::yes_type test(helper<&T::FUNC_NAME>*); \
 168   template<typename T> static ::boost::intrusive::detail::no_type test(...); \
 169   public: \
 170   static const bool value = sizeof(test<U>(0)) == sizeof(::boost::intrusive::detail::yes_type); \
 171   }; \
 172 //
 173
 174 #define BOOST_INTRUSIVE_HAS_MEMBER_FUNC_CALLED(TRAITS_NAME, FUNC_NAME) \
 175 template <typename Type> \
 176 struct TRAITS_NAME \
 177 { \
 178    struct BaseMixin \
 179    { \
 180       void FUNC_NAME(); \
 181    }; \
 182    struct Base : public Type, public BaseMixin { Base(); }; \
 183    template <typename T, T t> class Helper{}; \
 184    template <typename U> \
 185    static ::boost::intrusive::detail::no_type  test(U*, Helper<void (BaseMixin::*)(), &U::FUNC_NAME>* = 0); \
 186    static ::boost::intrusive::detail::yes_type test(...); \
 187    static const bool value = sizeof(::boost::intrusive::detail::yes_type) == sizeof(test((Base*)(0))); \
 188 };\
 189 //
 190
 191 #define BOOST_INTRUSIVE_HAS_MEMBER_FUNC_CALLED_IGNORE_SIGNATURE(TRAITS_NAME, FUNC_NAME) \
 192 BOOST_INTRUSIVE_HAS_MEMBER_FUNC_CALLED(TRAITS_NAME##_ignore_signature, FUNC_NAME) \
 193 \
 194 template <typename Type, class> \
 195 struct TRAITS_NAME \
 196    : public TRAITS_NAME##_ignore_signature<Type> \
 197 {};\
 198 //
 199
 200 } //namespace detail
 201 } //namespace intrusive
 202 } //namespace boost
 203
 204 #include <boost/intrusive/detail/config_end.hpp>
 205
 206 #endif //BOOST_INTRUSIVE_DETAIL_MPL_HPP