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115 lines
2.8 KiB
115 lines
2.8 KiB
/* |
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* Copyright 2008-2012 NVIDIA Corporation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#pragma once |
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#include <thrust/detail/config.h> |
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#include <thrust/tuple.h> |
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#include <thrust/detail/type_traits.h> |
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namespace thrust |
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{ |
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namespace detail |
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{ |
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namespace functional |
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{ |
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// this thing (which models Eval) is an adaptor for the unary |
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// functors inside functional.h |
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template<template<typename> class UnaryOperator> |
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struct unary_operator |
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{ |
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template<typename Env> |
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struct argument |
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: thrust::detail::eval_if< |
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(thrust::tuple_size<Env>::value == 0), |
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thrust::detail::identity_<thrust::null_type>, |
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thrust::tuple_element<0,Env> |
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> |
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{ |
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}; |
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template<typename Env> |
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struct operator_type |
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{ |
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typedef UnaryOperator< |
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typename thrust::detail::remove_reference< |
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typename argument<Env>::type |
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>::type |
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> type; |
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}; |
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template<typename Env> |
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struct result |
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{ |
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typedef typename operator_type<Env>::type op_type; |
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typedef typename op_type::result_type type; |
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}; |
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template<typename Env> |
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__host__ __device__ |
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typename result<Env>::type eval(const Env &e) const |
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{ |
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typename operator_type<Env>::type op; |
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return op(thrust::get<0>(e)); |
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} // end eval() |
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}; // end unary_operator |
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// this thing (which models Eval) is an adaptor for the binary |
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// functors inside functional.h |
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template<template<typename> class BinaryOperator> |
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struct binary_operator |
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{ |
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template<typename Env> |
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struct first_argument |
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: thrust::detail::eval_if< |
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(thrust::tuple_size<Env>::value == 0), |
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thrust::detail::identity_<thrust::null_type>, |
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thrust::tuple_element<0,Env> |
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> |
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{ |
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}; |
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template<typename Env> |
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struct operator_type |
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{ |
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typedef BinaryOperator< |
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typename thrust::detail::remove_reference< |
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typename first_argument<Env>::type |
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>::type |
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> type; |
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}; |
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template<typename Env> |
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struct result |
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{ |
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typedef typename operator_type<Env>::type op_type; |
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typedef typename op_type::result_type type; |
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}; |
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template<typename Env> |
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__host__ __device__ |
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typename result<Env>::type eval(const Env &e) const |
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{ |
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typename operator_type<Env>::type op; |
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return op(thrust::get<0>(e), thrust::get<1>(e)); |
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} // end eval() |
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}; // end binary_operator |
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} // end functional |
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} // end detail |
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} // end thrust |
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