/usr/include/thrust/detail/functional/argument.h is in libthrust-dev 1.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2008-2012 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Portions of this code are derived from
//
// Manjunath Kudlur's Carbon library
//
// and
//
// Based on Boost.Phoenix v1.2
// Copyright (c) 2001-2002 Joel de Guzman
#pragma once
#include <thrust/detail/config.h>
#include <thrust/tuple.h>
namespace thrust
{
namespace detail
{
namespace functional
{
template<unsigned int i, typename Env>
struct argument_helper
{
typedef typename thrust::tuple_element<i,Env>::type type;
};
template<unsigned int i>
struct argument_helper<i,thrust::null_type>
{
typedef thrust::null_type type;
};
template<unsigned int i>
class argument
{
public:
template<typename Env>
struct result
: argument_helper<i,Env>
{
};
__host__ __device__
argument(void){}
template<typename Env>
__host__ __device__
typename result<Env>::type eval(const Env &e) const
{
return thrust::get<i>(e);
} // end eval()
}; // end argument
} // end functional
} // end detail
} // end thrust
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