/usr/include/lexertl/partition/charset.hpp is in libpuma-dev 1:1.2-1.
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 (c) 2005-2011 Ben Hanson (http://www.benhanson.net/)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef LEXERTL_CHARSET_HPP
#define LEXERTL_CHARSET_HPP
#include <algorithm>
#include <iterator>
#include <set>
#include "../size_t.hpp"
#include "../string_token.hpp"
namespace lexertl
{
namespace detail
{
template<typename char_type, typename id_type>
struct basic_charset
{
typedef basic_string_token<char_type> token;
typedef std::set<id_type> index_set;
token _token;
index_set _index_set;
basic_charset ()
{
}
basic_charset (const token &token_, const std::size_t index_) :
_token (token_)
{
_index_set.insert (index_);
}
bool empty () const
{
return _token.empty () && _index_set.empty ();
}
void intersect (basic_charset &rhs_, basic_charset &overlap_)
{
_token.intersect (rhs_._token, overlap_._token);
if (!overlap_._token.empty ())
{
std::merge (_index_set.begin (), _index_set.end (),
rhs_._index_set.begin (), rhs_._index_set.end (),
std::inserter (overlap_._index_set,
overlap_._index_set.end ()));
if (_token.empty ())
{
_index_set.clear ();
}
if (rhs_._token.empty ())
{
rhs_._index_set.clear ();
}
}
}
};
}
}
#endif
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