/usr/include/deal.II/base/std_cxx1x/bind.h is in libdeal.ii-dev 8.1.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// $Id: bind.h 31349 2013-10-20 19:07:06Z maier $
//
// Copyright (C) 2009 - 2013 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------
#ifndef __deal2__std_cxx1x_bind_h
#define __deal2__std_cxx1x_bind_h
#include <deal.II/base/config.h>
#ifdef DEAL_II_USE_CXX11
# include <functional>
DEAL_II_NAMESPACE_OPEN
// in boost, the placeholders _1, _2, ... are in the global namespace. in
// C++0x, they are in namespace std::placeholders, which makes them awkward to
// use. import them into the deal.II::std_cxx1x namespace instead and do them
// same below if we use boost instead.
namespace std_cxx1x
{
using namespace std::placeholders;
using std::bind;
using std::ref;
using std::cref;
using std::reference_wrapper;
}
DEAL_II_NAMESPACE_CLOSE
#else
#include <boost/bind.hpp>
DEAL_II_NAMESPACE_OPEN
namespace std_cxx1x
{
using boost::bind;
using boost::ref;
using boost::cref;
using boost::reference_wrapper;
// now also import the _1, _2 placeholders from the global namespace
// into the current one as suggested above
using ::_1;
using ::_2;
using ::_3;
using ::_4;
using ::_5;
using ::_6;
using ::_7;
using ::_8;
using ::_9;
}
DEAL_II_NAMESPACE_CLOSE
#endif
#endif
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