/usr/include/trilinos/Kokkos_Sparse_OrdinalTraits.hpp is in libtrilinos-kokkos-kernels-dev 12.12.1-5.
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// KokkosKernels 0.9: Linear Algebra and Graph Kernels
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#ifndef KOKKOS_SPARSE_ORDINALTRAITS_HPP_
#define KOKKOS_SPARSE_ORDINALTRAITS_HPP_
/// \file Kokkos_Sparse_OrdinalTraits.hpp
/// \brief Declaration and definition of KokkosSparse::OrdinalTraits,
/// a traits class for "invalid" (flag) values of integer types that
/// KokkosKernels uses as local ordinals or global ordinals.
#include "KokkosKernels_config.h"
#include "Kokkos_Macros.hpp"
#include <climits>
namespace KokkosSparse {
/// \brief Traits class for "invalid" (flag) values of integer types
/// that Tpetra uses as local ordinals or global ordinals.
///
/// \tparam T Built-in integer type.
///
/// If T is signed, invalid() returns T(-1). If T is unsigned,
/// invalid() returns the maximum representable value of T. Do NOT
/// rely on these values!
///
/// I didn't choose the values this class calls "invalid." For
/// backwards compatibility, they are the same as the values found in
/// Teuchos::OrdinalTraits<T>::invalid(). I can't call
/// Teuchos::OrdinalTraits<T>::invalid() because it is not marked as a
/// Kokkos device function. I also can't use std::numeric_limits for
/// the same reason. That's why this traits class needs to exist.
template<class T>
struct OrdinalTraits {
static KOKKOS_INLINE_FUNCTION T invalid () { return -1; }
};
// template<>
// struct OrdinalTraits<char> {
// static KOKKOS_INLINE_FUNCTION char invalid () { return CHAR_MAX; }
// };
template<>
struct OrdinalTraits<short int> {
static KOKKOS_INLINE_FUNCTION short int invalid () { return -1; }
};
template<>
struct OrdinalTraits<unsigned short int> {
static KOKKOS_INLINE_FUNCTION unsigned short int invalid () { return USHRT_MAX; }
};
template<>
struct OrdinalTraits<int> {
static KOKKOS_INLINE_FUNCTION int invalid () { return -1; }
};
template<>
struct OrdinalTraits<unsigned int> {
static KOKKOS_INLINE_FUNCTION unsigned int invalid () { return UINT_MAX; }
};
template<>
struct OrdinalTraits<long> {
static KOKKOS_INLINE_FUNCTION long invalid () { return -1; }
};
template<>
struct OrdinalTraits<unsigned long> {
static KOKKOS_INLINE_FUNCTION unsigned long invalid () { return ULONG_MAX; }
};
template<>
struct OrdinalTraits<long long> {
static KOKKOS_INLINE_FUNCTION long long invalid () { return -1; }
};
template<>
struct OrdinalTraits<unsigned long long> {
static KOKKOS_INLINE_FUNCTION unsigned long long invalid () { return ULLONG_MAX; }
};
} // namespace KokkosSparse
#endif // KOKKOS_SPARSE_ORDINALTRAITS_HPP_
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