src/util/copy_cv_ref.h

   1 /*
   2  * Copyright 2017 Jacob Lifshay
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to deal
   6  * in the Software without restriction, including without limitation the rights
   7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   8  * copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in all
  12  * copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  20  * SOFTWARE.
  21  *
  22  */
  23
  24 #ifndef UTIL_COPY_CV_REF_H_
  25 #define UTIL_COPY_CV_REF_H_
  26
  27 namespace vulkan_cpu
  28 {
  29 namespace util
  30 {
  31 template <typename Source, typename Dest>
  32 struct copy_const
  33 {
  34     typedef Dest type;
  35 };
  36
  37 template <typename Source, typename Dest>
  38 struct copy_const<const Source, Dest>
  39 {
  40     typedef const Dest type;
  41 };
  42
  43 template <typename Source, typename Dest>
  44 using copy_const_t = typename copy_const<Source, Dest>::type;
  45
  46 template <typename Source, typename Dest>
  47 struct copy_volatile
  48 {
  49     typedef Dest type;
  50 };
  51
  52 template <typename Source, typename Dest>
  53 struct copy_volatile<volatile Source, Dest>
  54 {
  55     typedef volatile Dest type;
  56 };
  57
  58 template <typename Source, typename Dest>
  59 using copy_volatile_t = typename copy_volatile<Source, Dest>::type;
  60
  61 template <typename Source, typename Dest>
  62 struct copy_cv
  63 {
  64     typedef copy_const_t<Source, copy_volatile_t<Source, Dest>> type;
  65 };
  66
  67 template <typename Source, typename Dest>
  68 using copy_cv_t = typename copy_cv<Source, Dest>::type;
  69
  70 template <typename Source, typename Dest>
  71 struct copy_ref
  72 {
  73     typedef Dest type;
  74 };
  75
  76 template <typename Source, typename Dest>
  77 struct copy_ref<Source &, Dest>
  78 {
  79     typedef Dest &type;
  80 };
  81
  82 template <typename Source, typename Dest>
  83 struct copy_ref<Source &&, Dest>
  84 {
  85     typedef Dest &&type;
  86 };
  87
  88 template <typename Source, typename Dest>
  89 using copy_ref_t = typename copy_ref<Source, Dest>::type;
  90
  91 template <typename Source, typename Dest>
  92 struct copy_cv_ref
  93 {
  94     typedef copy_cv_t<Source, copy_ref_t<Source, Dest>> type;
  95 };
  96
  97 template <typename Source, typename Dest>
  98 using copy_cv_ref_t = typename copy_cv_ref<Source, Dest>::type;
  99 }
 100 }
 101
 102 #endif /* UTIL_COPY_CV_REF_H_ */