src/gromacs/utility/typetraits.h

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  35 /*! \libinternal \file
  36  * \brief
  37  * Declares type traits
  38  *
  39  * \inlibraryapi
  40  * \ingroup module_utility
  41  */
  42
  43 #ifndef GMX_UTILITY_TYPETRAITS_H
  44 #define GMX_UTILITY_TYPETRAITS_H
  45
  46 #include <type_traits>
  47
  48 namespace gmx
  49 {
  50
  51 /*! \libinternal \brief
  52  * Is true if type is a std::integral_constant
  53  *
  54  * If the optional integral type is given, than it is only true for a
  55  * std::integral_constant of that integral type.
  56  *
  57  * \tparam T type to check
  58  * \tparam Int optional integral type
  59  */
  60 template<typename T, typename Int = void>
  61 struct isIntegralConstant : public std::false_type
  62 {
  63 };
  64
  65 template<typename Int, Int N>
  66 struct isIntegralConstant<std::integral_constant<Int, N>, void> : public std::true_type
  67 {
  68 };
  69
  70 template<typename Int, Int N>
  71 struct isIntegralConstant<std::integral_constant<Int, N>, Int> : public std::true_type
  72 {
  73 };
  74
  75 } // namespace gmx
  76
  77 #endif