cusp::equal_pair_functor< T > Struct Template Reference

Detailed description

template<typename T>
struct cusp::equal_pair_functor< T >

equal_pair_functor is a function object that compares 2 element tuple entries.

Parameters

T	is a model of Assignable, and if x is an object of type thrust::tuple<T,T>, then x=c must be defined and must have a return type that is convertible to T.

Overview

equal_pair_functor is a function object. Specifically, it is an Adaptable Unary Function. If f(c) is an object of class equal_pair_functor<T>, and x is an object of class thrust::tuple<T,T>, then f(x) returns thrust::get<0>(x) == thrust::get<1>(x).

Example

#include <cusp/array1d.h>
#include <cusp/functional.h>
#include <cusp/print.h>

int main()
{
   // create an array with 5 entries all containing 2
   cusp::constant_array<float> twos(5, 2);
   // create an array with 5 entries from -2 to 2
   cusp::counting_array<float> counting(5, -2);

   // allocate size of transformed output array
   cusp::array1d<bool, cusp::host_memory> v(5, false);

   // compute output vector as transform of tens
   thrust::transform(thrust::make_zip_iterator(thrust::make_tuple(counting.begin(), twos.begin())),
                     thrust::make_zip_iterator(thrust::make_tuple(counting.begin(), twos.begin())) + v.size(),
                     v.begin(),
                     cusp::equal_pair_functor<float>());

   // v = [0, 0, 0, 1, 0]
   cusp::print(v);
}

Definition at line 877 of file functional.h.

#include <functional.h>

Inheritance diagram for cusp::equal_pair_functor< T >: