Created
December 24, 2015 00:14
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| #include <thrust/zip_function.h> | |
| #include <thrust/tuple.h> | |
| #include <thrust/iterator/zip_iterator.h> | |
| #include <thrust/iterator/transform_iterator.h> | |
| #include <thrust/functional.h> | |
| #include <thrust/copy.h> | |
| #include <iostream> | |
| #include <iterator> | |
| namespace demo | |
| { | |
| struct sum | |
| { | |
| template <typename T1, typename T2, typename T3> | |
| auto operator()(T1 x, T2 y, T3 z) -> decltype(x+y+z) | |
| { | |
| return x+y+z; | |
| } | |
| }; | |
| int sum3ints(int x, int y, int z) | |
| { | |
| return x+y+z; | |
| } | |
| } // end demo | |
| int main() | |
| { | |
| auto tuple = thrust::make_tuple(1, 2, 3); | |
| { | |
| auto zip_fun = thrust::make_zip_function(demo::sum3ints); | |
| std::cout << "result = " << zip_fun(tuple) << std::endl; | |
| } | |
| { | |
| auto zip_fun = thrust::make_zip_function(demo::sum()); | |
| std::cout << "result = " << zip_fun(tuple) << std::endl; | |
| } | |
| { | |
| using namespace thrust::placeholders; | |
| auto zip_fun = thrust::make_zip_function(_1 + _2 + _3); | |
| std::cout << "result = " << zip_fun(tuple) << std::endl; | |
| const std::size_t N = 4; | |
| int values_1[] = {1,1,1,1}; | |
| int values_2[] = {2,2,2,2}; | |
| int values_3[] = {3,3,3,3}; | |
| auto zip_it = thrust::make_zip_iterator( | |
| thrust::make_tuple( | |
| std::begin(values_1), | |
| std::begin(values_2), | |
| std::begin(values_3) | |
| ) | |
| ); | |
| auto transform_it = thrust::make_transform_iterator(zip_it, zip_fun); | |
| thrust::copy(transform_it, transform_it+N, std::ostream_iterator<int>(std::cout, "\t")); | |
| } | |
| } |
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