This file is indexed.

/usr/include/CGAL/Nested_iterator.h is in libcgal-dev 4.2-5ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
// Copyright (c) 2003  
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel).  All rights reserved. 
//
// This file is part of CGAL (www.cgal.org); you can 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 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
// 
//
// Author(s)     : Menelaos Karavelas <mkaravel@cse.nd.edu>


#ifndef CGAL_NESTED_ITERATOR_H
#define CGAL_NESTED_ITERATOR_H

#include <CGAL/iterator.h>
#include <iterator>

#if defined(BOOST_MSVC)
#  pragma warning(push)
#  pragma warning(disable:4396)
#endif

namespace CGAL {

template<class It>
struct Nested_iterator_traits
{
  typedef It                                 Base_iterator;
  typedef typename std::iterator_traits<It>::value_type::iterator  Iterator;

  Iterator begin(It it) const { return it->begin(); }
  Iterator end(It it) const { return it->end(); }
};

namespace internal {

  template<class Tr>
  struct Emptyness_predicate : public Tr
  {
    typedef Tr            Traits;

    bool operator()(typename Traits::Base_iterator base_it) const
    {
      return this->begin(base_it) == this->end(base_it);
    }

    
  };

  template<class F_iterator>
  class FI_w_begin_end : public F_iterator
  {
  private:
    typedef typename F_iterator::Predicate               Predicate;
    typedef typename Predicate::Traits::Iterator         Iterator;
    typedef typename Predicate::Traits::Base_iterator    Base_iterator;

  public:    
    FI_w_begin_end() : F_iterator() {}

    FI_w_begin_end(Base_iterator it2,
		   Base_iterator it3)
      : F_iterator(it2, Predicate(), it3) {}

    Iterator begin(Base_iterator it)
    {
      return this->predicate().begin(it);
    }

    Iterator end(Base_iterator it)
    {
      return this->predicate().end(it);
    }

  };

}

template<class Base_it, class Tr> class Nested_iterator;

template<class Base_it, class Tr>
bool operator==(const Nested_iterator<Base_it,Tr>&,
		const Nested_iterator<Base_it,Tr>&);

template <typename Base_it,
	  typename Tr = Nested_iterator_traits<Base_it> >
class Nested_iterator
  : private internal::FI_w_begin_end<
  Filter_iterator<Base_it, internal::Emptyness_predicate<Tr> > >
{
  typedef Nested_iterator<Base_it,Tr>           Self;
public:
  typedef Base_it                               Base_iterator;
  typedef Tr                                    Traits;
  typedef typename Tr::Iterator                 Iterator;

protected:
  typedef internal::
  FI_w_begin_end< Filter_iterator<Base_iterator,
				  internal::Emptyness_predicate<Tr> > >
  Filter_base_iterator;

private:
  typedef std::iterator_traits<Iterator>        ItTraits;

public:
  typedef typename ItTraits::reference          reference;
  typedef typename ItTraits::pointer            pointer;
  typedef typename ItTraits::value_type         value_type;
  typedef typename ItTraits::difference_type    difference_type;
  typedef typename ItTraits::iterator_category  iterator_category;

public:
  Nested_iterator() : Filter_base_iterator(), nested_it_() {}
  Nested_iterator(Base_iterator base_it_end,
		  Base_iterator base_it_cur)
    : Filter_base_iterator(base_it_end, base_it_cur), nested_it_()
  {
    if ( !this->is_end() ) {
      nested_it_ = this->begin( this->base() );
    }
  }

  Nested_iterator(const Self& other)
    : Filter_base_iterator(other)
  {
    if ( !other.is_end() )
      nested_it_ = other.nested_it_;
  }

  Self& operator=(const Self& other)
  {
    copy_from(other);
    return *this;
  }

  Self& operator++()
  {
    if ( nested_it_ != this->end( this->base() ) ) {
      ++nested_it_;
      if ( nested_it_ == this->end( this->base() ) ) {
	Filter_base_iterator::operator++();
	if ( !this->is_end() ) {
	  nested_it_ = this->begin( this->base() );
	}
      }
    } 
    return *this;
  }

  Self operator++(int)
  {
    Self tmp = *this;
    ++(*this);
    return tmp;
  }

  Self& operator--()
  {
    if ( this->is_end() ) {
      Filter_base_iterator::operator--();
      nested_it_ = this->end(this->base());
      --nested_it_;
    } else {
      if ( nested_it_ != this->begin( this->base() ) ) {
	--nested_it_;
      } else {
	Filter_base_iterator::operator--();
	nested_it_ = this->end( this->base() );
	--nested_it_;
      }
    }
    return *this;
  }

  Self operator--(int)
  {
    
    Self tmp = *this;
    --(*this);
    return tmp;
  }

  
  reference  operator*()  const
  {
    return *nested_it_;
  }

  pointer    operator->() const
  {
    return nested_it_.operator->();
  }

  friend bool operator==<>(const Self&, const Self&);

protected:
  void copy_from(const Self& other)
  {
    Filter_base_iterator::operator=(other);
    if ( !other.is_end() ) {
      nested_it_ = other.nested_it_;
    }
  }

protected:
  Iterator       nested_it_;
};





template<class Base_it, class Traits>
inline
bool operator==(const Nested_iterator<Base_it,Traits>& it1,
		const Nested_iterator<Base_it,Traits>& it2)
{
  //  CGAL_precondition( it1.b_ == it2.b_ && it1.e_ == it2.e_ );

  if ( it1.base() != it2.base() ) { return false; }
  return it1.is_end() || ( it1.nested_it_ == it2.nested_it_ );
}

template<class Base_it, class Traits>
inline
bool operator!=(const Nested_iterator<Base_it,Traits>& it1,
		const Nested_iterator<Base_it,Traits>& it2)
{
  return !(it1 == it2);
}


} //namespace CGAL

#if defined(BOOST_MSVC)
#  pragma warning(pop)
#endif

#endif // CGAL_NESTED_ITERATOR_H