KokkosNDLambdaWrapper< dim, FUN > Struct Template Reference#

DiFfRG: DiFfRG::KokkosNDLambdaWrapper< dim, FUN > Struct Template Reference

DiFfRG

This is a functor which wraps a lambda. Basically, this is necessary when one wants to call a variadic lambda on an NVIDIA GPU. CUDA seems to be unable to expand the variadic arguments - in contrast, a direct approach does indeed work for openMP or serial compilation. To get around this limitation, the KokkosNDLambdaWrapper packs the indices into an array. If you wonder, whether there's a difference when using tie and tuples: https://godbolt.org/z/M3bG39rsM No. Therefore, we spare the ourselves the hassle and simply use an array. More...

#include <kokkos.hh>

Public Member Functions
KOKKOS_FUNCTION	KokkosNDLambdaWrapper (const FUN &_fun)

template<typename... Args> requires (sizeof...(Args) == dim)
KOKKOS_FORCEINLINE_FUNCTION void	operator() (Args &&...args) const

Public Attributes
FUN	fun

Detailed Description

template<int dim, typename FUN>
struct DiFfRG::KokkosNDLambdaWrapper< dim, FUN >

This is a functor which wraps a lambda. Basically, this is necessary when one wants to call a variadic lambda on an NVIDIA GPU. CUDA seems to be unable to expand the variadic arguments - in contrast, a direct approach does indeed work for openMP or serial compilation. To get around this limitation, the KokkosNDLambdaWrapper packs the indices into an array. If you wonder, whether there's a difference when using tie and tuples: https://godbolt.org/z/M3bG39rsM No. Therefore, we spare the ourselves the hassle and simply use an array.

Template Parameters

dim	Number of arguments taken
FUN	The lambda to which we forward the indices

Constructor & Destructor Documentation