1/* 2 * Copyright 2008-2016 NVIDIA Corporation 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include <thrust/iterator/transform_output_iterator.h> 18#include <thrust/iterator/iterator_adaptor.h> 19 20namespace thrust 21{ 22 23template <typename OutputIterator, typename UnaryFunction> 24 class transform_output_iterator; 25 26namespace detail 27{ 28 29// Proxy reference that uses Unary Functiont o transform the rhs of assigment 30// operator before writing the result to OutputIterator 31template <typename UnaryFunction, typename OutputIterator> 32 class transform_output_iterator_proxy 33{ 34 public: 35 __host__ __device__ 36 transform_output_iterator_proxy(const OutputIterator& out, UnaryFunction fun) : out(out), fun(fun) 37 { 38 } 39 40 __thrust_exec_check_disable__ 41 template <typename T> 42 __host__ __device__ 43 transform_output_iterator_proxy operator=(const T& x) 44 { 45 *out = fun(x); 46 return *this; 47 } 48 49 private: 50 OutputIterator out; 51 UnaryFunction fun; 52}; 53 54// Compute the iterator_adaptor instantiation to be used for transform_output_iterator 55template <typename UnaryFunction, typename OutputIterator> 56struct transform_output_iterator_base 57{ 58 typedef thrust::iterator_adaptor 59 < 60 transform_output_iterator<UnaryFunction, OutputIterator> 61 , OutputIterator 62 , thrust::use_default 63 , thrust::use_default 64 , thrust::use_default 65 , transform_output_iterator_proxy<UnaryFunction, OutputIterator> 66 > type; 67}; 68 69// Register trasnform_output_iterator_proxy with 'is_proxy_reference' from 70// type_traits to enable its use with algorithms. 71template <class OutputIterator, class UnaryFunction> 72struct is_proxy_reference< 73 transform_output_iterator_proxy<OutputIterator, UnaryFunction> > 74 : public thrust::detail::true_type {}; 75 76} // end detail 77} // end thrust 78 79