pack_traits.h

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#ifndef GRPPI_COMMON_PACK_TRAITS_H
#define GRPPI_COMMON_PACK_TRAITS_H

namespace grppi {

namespace internal {

template <int Index, typename ... T>
using requires_index_last =
  std::enable_if_t<(Index == sizeof...(T) - 1), int>;

template <int Index, typename ... T>
using requires_index_not_last =
  std::enable_if_t<(Index < sizeof...(T) - 1), int>;

} // end namespace internal

} // end namespace grppi

#endif