commons/modules/core/include/dpl/type_list.h

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *    Licensed under the Apache License, Version 2.0 (the "License");
   5  *    you may not use this file except in compliance with the License.
   6  *    You may obtain a copy of the License at
   7  *
   8  *        http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *    Unless required by applicable law or agreed to in writing, software
  11  *    distributed under the License is distributed on an "AS IS" BASIS,
  12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *    See the License for the specific language governing permissions and
  14  *    limitations under the License.
  15  */
  16 /*
  17  * @file        type_list.h
  18  * @author      Bartosz Janiak (b.janiak@samsung.com)
  19  * @version     1.0
  20  * @brief       Generic type list template
  21  */
  22 #ifndef DPL_TYPE_LIST_H
  23 #define DPL_TYPE_LIST_H
  24
  25 #include <cstddef>
  26
  27 namespace DPL {
  28 class TypeListGuard
  29 {
  30   public:
  31     template<size_t Index>
  32     struct Element
  33     {
  34         struct ERROR_TypeListElementIndexIsOutOfBounds;
  35         typedef ERROR_TypeListElementIndexIsOutOfBounds Type;
  36     };
  37
  38     static const size_t Size = 0;
  39 };
  40
  41 template<typename HeadType, typename TailType>
  42 class TypeList
  43 {
  44   private:
  45     class DummyClass
  46     {};
  47
  48     template<typename List, size_t Enum>
  49     struct TypeCounter : public TypeCounter<typename List::Tail, Enum + 1>
  50     {};
  51
  52     template<size_t Enum>
  53     struct TypeCounter<TypeListGuard, Enum>
  54     {
  55         static const size_t Size = Enum;
  56     };
  57
  58   public:
  59     typedef TailType Tail;
  60     typedef HeadType Head;
  61     typedef TypeList<HeadType, TailType> ThisType;
  62
  63     template<size_t Index, typename DummyType = DummyClass>
  64     struct Element
  65     {
  66         typedef typename TailType::template Element<Index - 1>::Type Type;
  67     };
  68
  69     template<typename DummyType>
  70     struct Element<0, DummyType>
  71     {
  72         typedef HeadType Type;
  73     };
  74
  75     template<typename Type, typename DummyType = DummyClass>
  76     struct Contains
  77     {
  78         typedef typename TailType::template Contains<Type>::Yes Yes;
  79     };
  80
  81     template<typename DummyType>
  82     struct Contains<HeadType, DummyType>
  83     {
  84         typedef int Yes;
  85     };
  86
  87     static const size_t Size = TypeCounter<ThisType, 0>::Size;
  88 };
  89
  90 template<typename T1 = TypeListGuard, typename T2 = TypeListGuard,
  91          typename T3 = TypeListGuard, typename T4 = TypeListGuard,
  92          typename T5 = TypeListGuard, typename T6 = TypeListGuard,
  93          typename T7 = TypeListGuard, typename T8 = TypeListGuard,
  94          typename T9 = TypeListGuard, typename T10 = TypeListGuard,
  95          typename T11 = TypeListGuard, typename T12 = TypeListGuard,
  96          typename T13 = TypeListGuard, typename T14 = TypeListGuard,
  97          typename T15 = TypeListGuard, typename T16 = TypeListGuard,
  98          typename T17 = TypeListGuard, typename T18 = TypeListGuard,
  99          typename T19 = TypeListGuard, typename T20 = TypeListGuard,
 100          typename T21 = TypeListGuard, typename T22 = TypeListGuard,
 101          typename T23 = TypeListGuard, typename T24 = TypeListGuard,
 102          typename T25 = TypeListGuard, typename T26 = TypeListGuard,
 103          typename T27 = TypeListGuard, typename T28 = TypeListGuard,
 104          typename T29 = TypeListGuard, typename T30 = TypeListGuard,
 105          typename T31 = TypeListGuard, typename T32 = TypeListGuard,
 106          typename T33 = TypeListGuard, typename T34 = TypeListGuard,
 107          typename T35 = TypeListGuard, typename T36 = TypeListGuard,
 108          typename T37 = TypeListGuard, typename T38 = TypeListGuard,
 109          typename T39 = TypeListGuard, typename T40 = TypeListGuard,
 110          typename T41 = TypeListGuard, typename T42 = TypeListGuard,
 111          typename T43 = TypeListGuard, typename T44 = TypeListGuard,
 112          typename T45 = TypeListGuard, typename T46 = TypeListGuard,
 113          typename T47 = TypeListGuard, typename T48 = TypeListGuard,
 114          typename T49 = TypeListGuard, typename T50 = TypeListGuard,
 115          typename T51 = TypeListGuard, typename T52 = TypeListGuard,
 116          typename T53 = TypeListGuard, typename T54 = TypeListGuard,
 117          typename T55 = TypeListGuard, typename T56 = TypeListGuard,
 118          typename T57 = TypeListGuard, typename T58 = TypeListGuard,
 119          typename T59 = TypeListGuard, typename T60 = TypeListGuard,
 120          typename T61 = TypeListGuard, typename T62 = TypeListGuard,
 121          typename T63 = TypeListGuard, typename T64 = TypeListGuard>
 122 struct TypeListDecl
 123 {
 124     typedef TypeList<T1,
 125                      typename TypeListDecl<
 126                          T2, T3, T4, T5, T6, T7, T8,
 127                          T9, T10, T11, T12, T13, T14, T15,
 128                          T16, T17, T18, T19, T20, T21, T22,
 129                          T23, T24, T25, T26, T27, T28, T29,
 130                          T30, T31, T32, T33, T34, T35, T36,
 131                          T37, T38, T39, T40, T41, T42, T43,
 132                          T44, T45, T46, T47, T48, T49, T50,
 133                          T51, T52, T53, T54, T55, T56, T57,
 134                          T58, T59, T60, T61, T62, T63, T64>::Type> Type;
 135 };
 136
 137 template<>
 138 struct TypeListDecl<TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 139                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 140                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 141                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 142                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 143                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 144                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 145                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 146                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 147                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 148                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 149                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 150                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 151                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 152                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard,
 153                     TypeListGuard, TypeListGuard, TypeListGuard, TypeListGuard>
 154 {
 155     typedef TypeListGuard Type;
 156 };
 157 } // namespace DPL
 158
 159 #endif // DPL_TYPE_LIST_H