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#include <thrust/device_vector.h>
#include <thrust/merge.h>
#include <thrust/iterator/discard_iterator.h>
#include <thrust/iterator/zip_iterator.h>
#include <thrust/tuple.h>
struct comp
{
template<typename Tuple1, typename Tuple2>
__host__ __device__
bool operator()(const Tuple1& t1, const Tuple2& t2)
{
return thrust::get<0>(t1) == thrust::get<1>(t2);
}
};
int main()
{
typedef thrust::device_vector<int> Vector;
Vector second(10), third(5), fourth(5), indices(15);
thrust::merge_by_key(thrust::make_zip_iterator(thrust::make_tuple(thrust::constant_iterator<int>(12), second.begin())),
thrust::make_zip_iterator(thrust::make_tuple(thrust::constant_iterator<int>(12), second.begin())) + 10,
thrust::make_zip_iterator(thrust::make_tuple(third.begin(), fourth.begin())),
thrust::make_zip_iterator(thrust::make_tuple(third.begin(), fourth.begin())) + 5,
thrust::counting_iterator<int>(0),
thrust::counting_iterator<int>(10),
thrust::make_discard_iterator(),
indices.begin(),
comp());
return 0;
}
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