for_each_n

Header File: Kokkos_StdAlgorithms.hpp

namespace Kokkos{
namespace Experimental{

template <class ExecutionSpace, class InputIterator, class SizeType, class UnaryFunctorType>
UnaryFunctorType for_each_n(const ExecutionSpace& exespace,
                      InputIterator first, SizeType n,
                      UnaryFunctorType functor);                                     (1)

template <class ExecutionSpace, class InputIterator, class SizeType, class UnaryFunctorType>
UnaryFunctorType for_each_n(const std::string& label, const ExecutionSpace& exespace,
                      InputIterator first, SizeType n
                      UnaryFunctorType functor);                                     (2)

template <class ExecutionSpace, class DataType, class... Properties, class SizeType, class UnaryFunctorType>
UnaryFunctorType for_each_n(const ExecutionSpace& exespace,
             const Kokkos::View<DataType, Properties...>& view, SizeType n,
             UnaryFunctorType functor);                                              (3)

template <class ExecutionSpace, class DataType, class... Properties, class SizeType, class UnaryFunctorType>
UnaryFunctorType for_each_n(const std::string& label, const ExecutionSpace& exespace,
             const Kokkos::View<DataType, Properties...>& view, SizeType n,
             UnaryFunctorType func);                                                 (4)

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

Description

Applies the UnaryFunctorType func to the result of dereferencing each iterator in [first,first+n] for (1,2) and in (3,4) the functor is applied to the first n elements of the view.

• (1,2): overload set accepting iterators

• (3,4): overload set accepting views

Parameters and Requirements

• exespace, first, view, func : same as in for_each

• label:

  • for 1, the default string is: “Kokkos::for_each_n_iterator_api_default”

  • for 3, the default string is: “Kokkos::for_each_n_view_api_default”

• n:

  • number of elements to operate on

Return

func