Line data    Source code

       1             : // The libMesh Finite Element Library.
       2             : // Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
       3             : 
       4             : // This library is free software; you can redistribute it and/or
       5             : // modify it under the terms of the GNU Lesser General Public
       6             : // License as published by the Free Software Foundation; either
       7             : // version 2.1 of the License, or (at your option) any later version.
       8             : 
       9             : // This library is distributed in the hope that it will be useful,
      10             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             : // Lesser General Public License for more details.
      13             : 
      14             : // You should have received a copy of the GNU Lesser General Public
      15             : // License along with this library; if not, write to the Free Software
      16             : // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      17             : 
      18             : 
      19             : 
      20             : #ifndef LIBMESH_PPITER_H
      21             : #define LIBMESH_PPITER_H
      22             : 
      23             : 
      24             : namespace libMesh
      25             : {
      26             : 
      27             : /**
      28             :  * The \p PointerToPointerIter templated class is intended to wrap
      29             :  * pointer-to-pointer iterators in an interface which works more like
      30             :  * a standard iterator, by returning a value rather than a pointer.
      31             :  *
      32             :  * \author  Roy H. Stogner
      33             :  */
      34             : 
      35             : template <typename T>
      36             : class PointerToPointerIter
      37             : {
      38             : public:
      39    49211126 :   PointerToPointerIter (T * const * it) : _it(it) {}
      40             : 
      41  5124679683 :   T & operator* () const { return **_it; }
      42             : 
      43   178467234 :   const PointerToPointerIter & operator++ ()
      44             :   {
      45  5120310830 :     ++_it;
      46  4801240688 :     return *this;
      47             :   }
      48             : 
      49             :   PointerToPointerIter operator++ (int)
      50             :   {
      51             :     PointerToPointerIter returnval(*this);
      52             :     ++_it;
      53             :     return returnval;
      54             :   }
      55             : 
      56   203072797 :   bool operator== (const PointerToPointerIter & j) const
      57             :   {
      58   203072797 :     return ( _it == j._it );
      59             :   }
      60             : 
      61   203072797 :   bool operator!= (const PointerToPointerIter & j) const
      62             :   {
      63   203072797 :     return !(*this == j);
      64             :   }
      65             : 
      66             : private:
      67             :   T * const * _it;
      68             : };
      69             : 
      70             : } // namespace libMesh
      71             : 
      72             : #endif // LIBMESH_PPITER_H