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116 lines
2.8 KiB
116 lines
2.8 KiB
11 years ago
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/*
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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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