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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
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
func
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