compare_less.h 4.4 KB

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  1. /************************************************************************************
  2. * *
  3. * Copyright (c) 2014 - 2018 Axel Menzel <info@rttr.org> *
  4. * *
  5. * This file is part of RTTR (Run Time Type Reflection) *
  6. * License: MIT License *
  7. * *
  8. * Permission is hereby granted, free of charge, to any person obtaining *
  9. * a copy of this software and associated documentation files (the "Software"), *
  10. * to deal in the Software without restriction, including without limitation *
  11. * the rights to use, copy, modify, merge, publish, distribute, sublicense, *
  12. * and/or sell copies of the Software, and to permit persons to whom the *
  13. * Software is furnished to do so, subject to the following conditions: *
  14. * *
  15. * The above copyright notice and this permission notice shall be included in *
  16. * all copies or substantial portions of the Software. *
  17. * *
  18. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
  19. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
  20. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
  21. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
  22. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, *
  23. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE *
  24. * SOFTWARE. *
  25. * *
  26. *************************************************************************************/
  27. #ifndef RTTR_COMPARE_LESS_H_
  28. #define RTTR_COMPARE_LESS_H_
  29. #include "rttr/detail/base/core_prerequisites.h"
  30. #include "rttr/detail/misc/misc_type_traits.h"
  31. #include "rttr/detail/comparison/comparable_types.h"
  32. #include "rttr/detail/misc/template_type_trait.h"
  33. #include <type_traits>
  34. namespace rttr
  35. {
  36. class type;
  37. namespace detail
  38. {
  39. /////////////////////////////////////////////////////////////////////////////////////////
  40. RTTR_API bool compare_types_less_than(const void* lhs, const void* rhs, const type& t, int& result);
  41. template<typename T>
  42. using has_less_than_operator_impl = std::integral_constant<bool, has_less_than_operator<T>::value && !std::is_array<T>::value &&
  43. !is_template_instance<T>::value>;
  44. template<typename T>
  45. using is_less_than_comparable = std::integral_constant<bool, has_less_than_operator_impl<T>::value ||
  46. is_comparable_type<T>::value>;
  47. /////////////////////////////////////////////////////////////////////////////////////////
  48. template<typename T>
  49. RTTR_INLINE typename std::enable_if<is_less_than_comparable<T>::value && !std::is_array<T>::value, bool>::type
  50. compare_less_than(const T& lhs, const T& rhs, int& result);
  51. /////////////////////////////////////////////////////////////////////////////////////////
  52. template<typename T>
  53. RTTR_INLINE typename std::enable_if<!is_less_than_comparable<T>::value && !std::is_array<T>::value, bool>::type
  54. compare_less_than(const T& lhs, const T& rhs, int& result);
  55. /////////////////////////////////////////////////////////////////////////////////////////
  56. template<typename T>
  57. RTTR_INLINE typename std::enable_if<!is_less_than_comparable<T>::value && std::is_array<T>::value, bool>::type
  58. compare_less_than(const T& lhs, const T& rhs, int& result);
  59. /////////////////////////////////////////////////////////////////////////////////////////
  60. } // end namespace detail
  61. } // end namespace rttr
  62. #include "rttr/detail/comparison/compare_less_impl.h"
  63. // the include in this place is necessary, otherwise we get an error during compilation:
  64. // "'compare_equal': identifier not found"
  65. #include "rttr/detail/misc/template_type_trait_impl.h"
  66. #endif // RTTR_COMPARE_LESS_H_