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#include <unittest/unittest.h>
#include <thrust/tuple.h>
#include <thrust/transform.h>
using namespace unittest;
struct MakeTupleFunctor
{
template<typename T1, typename T2>
THRUST_HOST_DEVICE
thrust::tuple<T1,T2> operator()(T1 &lhs, T2 &rhs)
{
return thrust::make_tuple(lhs, rhs);
}
};
template<int N>
struct GetFunctor
{
template<typename Tuple>
THRUST_HOST_DEVICE
decltype(auto) operator()(const Tuple &t)
{
return thrust::get<N>(t);
}
};
template <typename T>
struct TestTupleTransform
{
void operator()(const size_t n)
{
using namespace thrust;
host_vector<T> h_t1 = random_integers<T>(n);
host_vector<T> h_t2 = random_integers<T>(n);
// zip up the data
host_vector< tuple<T,T> > h_tuples(n);
transform(h_t1.begin(), h_t1.end(),
h_t2.begin(), h_tuples.begin(),
MakeTupleFunctor());
// copy to device
device_vector< tuple<T,T> > d_tuples = h_tuples;
device_vector<T> d_t1(n), d_t2(n);
// select 0th
transform(d_tuples.begin(), d_tuples.end(), d_t1.begin(), GetFunctor<0>());
// select 1st
transform(d_tuples.begin(), d_tuples.end(), d_t2.begin(), GetFunctor<1>());
ASSERT_ALMOST_EQUAL(h_t1, d_t1);
ASSERT_ALMOST_EQUAL(h_t2, d_t2);
ASSERT_EQUAL_QUIET(h_tuples, d_tuples);
}
};
VariableUnitTest<TestTupleTransform, SignedIntegralTypes> TestTupleTransformInstance;
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