count

Header File: Kokkos_StdAlgorithms.hpp

namespace Kokkos{
namespace Experimental{

template <class ExecutionSpace, class IteratorType, class T>
typename IteratorType::difference_type count(const ExecutionSpace& exespace,
                                             IteratorType first,
                                             IteratorType last,                      (1)
                                             const T& value);

template <class ExecutionSpace, class IteratorType, class T>
typename IteratorType::difference_type count(const std::string& label,
                                             const ExecutionSpace& exespace,
                                             IteratorType first,
                                             IteratorType last,                      (2)
                                             const T& value);

template <class ExecutionSpace, class DataType, class... Properties, class T>
auto count(const ExecutionSpace& exespace,                                           (3)
           const ::Kokkos::View<DataType, Properties...>& view, const T& value);

template <class ExecutionSpace, class DataType, class... Properties, class T>
auto count(const std::string& label, const ExecutionSpace& exespace,                 (4)
           const ::Kokkos::View<DataType, Properties...>& view, const T& value);

} //end namespace Experimental
} //end namespace Kokkos

Description

Returns the number of elements in the range [first,last) (1,2) or in view (3,4) that are equal to value.

Parameters and Requirements

• exespace:

  • execution space instance

• label:

  • 1: The default string is “Kokkos::count_iterator_api_default”.

  • 3: The default string is “Kokkos::count_view_api_default”.

• first, last:

  • range of elements to search in

  • must be random access iterators, e.g., returned from Kokkos::Experimental::(c)begin/(c)end

  • must represent a valid range, i.e., last >= first (this condition is checked in debug mode)

  • must be accessible from exespace

• view:

  • must be rank-1, and have LayoutLeft, LayoutRight, or LayoutStride

  • must be accessible from exespace