/usr/include/boost/accumulators/framework/accumulator_base.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// accumulator_base.hpp
//
// Copyright 2005 Eric Niebler. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_BASE_HPP_EAN_28_10_2005
#define BOOST_ACCUMULATORS_FRAMEWORK_ACCUMULATORS_BASE_HPP_EAN_28_10_2005
#include <boost/mpl/placeholders.hpp>
#include <boost/mpl/joint_view.hpp>
#include <boost/mpl/single_view.hpp>
#include <boost/mpl/fold.hpp>
#include <boost/mpl/contains.hpp>
#include <boost/mpl/empty_sequence.hpp>
#include <boost/accumulators/framework/accumulator_concept.hpp>
namespace boost { namespace accumulators
{
namespace detail
{
typedef void void_;
}
///////////////////////////////////////////////////////////////////////////////
// dont_care
//
struct dont_care
{
template<typename Args>
dont_care(Args const &)
{
}
};
///////////////////////////////////////////////////////////////////////////////
// accumulator_base
//
struct accumulator_base
{
// hidden if defined in derived classes
detail::void_ operator ()(dont_care)
{
}
typedef mpl::false_ is_droppable;
detail::void_ add_ref(dont_care)
{
}
detail::void_ drop(dont_care)
{
}
detail::void_ on_drop(dont_care)
{
}
};
}} // namespace boost::accumulators
#endif
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