extl/memory/memory_traits_selector.h

   1 /* ///////////////////////////////////////////////////////////////////////
   2  * File:                memory_traits_selector.h
   3  *
   4  * Created:             08.07.30
   5  * Updated:             08.07.30
   6  *
   7  * Brief: memory_traits_selector class
   8  *
   9  * [<Home>]
  10  * Copyright (c) 2008-2020, Waruqi All rights reserved.
  11  * //////////////////////////////////////////////////////////////////// */
  12
  13 #ifndef EXTL_MEMORY_MEMORY_TRAITS_SELECTOR_H
  14 #define EXTL_MEMORY_MEMORY_TRAITS_SELECTOR_H
  15
  16 /*!\file memory_traits_selector.h
  17  * \brief memory_traits_selector class
  18  */
  19 #ifndef __cplusplus
  20 #       error memory_traits_selector.h need be supported by c++.
  21 #endif
  22
  23 /* ///////////////////////////////////////////////////////////////////////
  24  * Includes
  25  */
  26 #include "prefix.h"
  27 #include "object_memory_traits.h"
  28 #include "pod_memory_traits.h"
  29
  30 #include "../type/traits/is_arithmetic.h"
  31
  32 #ifdef EXTL_TYPE_TRAITS_IS_POD_SUPPORT
  33 #       include "../type/traits/is_pod.h"
  34 #endif
  35
  36 #ifdef EXTL_TYPE_TRAITS_IS_SCALAR_SUPPORT
  37 #       include "../type/traits/is_scalar.h"
  38 #endif
  39
  40 #ifdef EXTL_MPL_IF_SUPPORT
  41 #       include "../mpl/if_.h"
  42 #endif
  43
  44 /* ///////////////////////////////////////////////////////////////////////
  45  * ::extl namespace
  46  */
  47 EXTL_BEGIN_NAMESPACE
  48
  49 /*!\brief memory_traits_selector class
  50  *
  51  * \param T The value type
  52  *
  53  * \ingroup extl_group_memory
  54  */
  55 template<typename_param_k T>
  56 struct memory_traits_selector
  57 {
  58         #ifdef EXTL_MPL_IF_SUPPORT
  59                 #if defined(EXTL_TYPE_TRAITS_IS_POD_SUPPORT)
  60                         typedef typename_type_k EXTL_NS_MPL(if_)<       (is_pod<T>::value)
  61                                                                                                         ,       pod_memory_traits<T>
  62                                                                                                         ,       object_memory_traits<T>
  63                                                                                                         >::type                 memory_traits_type;
  64
  65                 #elif defined(EXTL_TYPE_TRAITS_IS_SCALAR_SUPPORT)
  66                         typedef typename_type_k EXTL_NS_MPL(if_)<       (is_scalar<T>::value)
  67                                                                                                         ,       pod_memory_traits<T>
  68                                                                                                         ,       object_memory_traits<T>
  69                                                                                                         >::type                 memory_traits_type;
  70
  71                 #else
  72                         typedef typename_type_k EXTL_NS_MPL(if_)<       (is_arithmetic<T>::value)
  73                                                                                                         ,       pod_memory_traits<T>
  74                                                                                                         ,       object_memory_traits<T>
  75                                                                                                         >::type                 memory_traits_type;
  76                 #endif
  77         #else
  78                 typedef object_memory_traits<T>                                                         memory_traits_type;
  79         #endif
  80 };
  81 /* ///////////////////////////////////////////////////////////////////////
  82  * ::extl namespace
  83  */
  84 EXTL_END_NAMESPACE
  85
  86 /* //////////////////////////////////////////////////////////////////// */
  87 #endif /* EXTL_MEMORY_MEMORY_TRAITS_SELECTOR_H */
  88 /* //////////////////////////////////////////////////////////////////// */