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The C and C++ Include Header Files

/usr/include/c++/11/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp


$ cat -n /usr/include/c++/11/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp

     1	// -*- C++ -*-
     2	
     3	// Copyright (C) 2005-2021 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the terms
     7	// of the GNU General Public License as published by the Free Software
     8	// Foundation; either version 3, or (at your option) any later
     9	// version.
    10	
    11	// This library is distributed in the hope that it will be useful, but
    12	// WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    14	// General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
    26	
    27	// Permission to use, copy, modify, sell, and distribute this software
    28	// is hereby granted without fee, provided that the above copyright
    29	// notice appears in all copies, and that both that copyright notice
    30	// and this permission notice appear in supporting documentation. None
    31	// of the above authors, nor IBM Haifa Research Laboratories, make any
    32	// representation about the suitability of this software for any
    33	// purpose. It is provided "as is" without express or implied
    34	// warranty.
    35	
    36	/**
    37	 * @file tree_policy/node_metadata_selector.hpp
    38	 * Contains an implementation class for trees.
    39	 */
    40	
    41	#ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
    42	#define PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
    43	
    44	#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
    45	#include <ext/pb_ds/detail/types_traits.hpp>
    46	
    47	namespace __gnu_pbds
    48	{
    49	  namespace detail
    50	  {
    51	    /**
    52	     *  @addtogroup traits Traits
    53	     *  @{
    54	     */
    55	
    56	    /// Tree metadata helper.
    57	    template<typename Node_Update, bool _BTp>
    58	      struct tree_metadata_helper;
    59	
    60	    /// Specialization, false.
    61	    template<typename Node_Update>
    62	      struct tree_metadata_helper<Node_Update, false>
    63	      {
    64		typedef typename Node_Update::metadata_type 	type;
    65	      };
    66	
    67	    /// Specialization, true.
    68	    template<typename Node_Update>
    69	      struct tree_metadata_helper<Node_Update, true>
    70	      {
    71		typedef null_type 				type;
    72	      };
    73	
    74	    /// Tree node metadata dispatch.
    75	    template<typename Key,
    76		     typename Data,
    77		     typename Cmp_Fn,
    78		     template<typename Node_CItr,
    79			      typename Const_Iterator,
    80			      typename Cmp_Fn_,
    81			      typename _Alloc_>
    82		     class Node_Update,
    83		     typename _Alloc>
    84	    struct tree_node_metadata_dispatch
    85	    {
    86	    private:
    87	      typedef dumnode_const_iterator<Key, Data, _Alloc>		__it_type;
    88	      typedef Node_Update<__it_type, __it_type, Cmp_Fn, _Alloc>	__node_u;
    89	      typedef null_node_update<__it_type, __it_type, Cmp_Fn, _Alloc> __nnode_u;
    90	
    91	      enum
    92		{
    93		  null_update = is_same<__node_u, __nnode_u>::value
    94		};
    95	
    96	    public:
    97	      typedef typename tree_metadata_helper<__node_u, null_update>::type type;
    98	    };
    99	    ///@}
   100	  } // namespace detail
   101	} // namespace __gnu_pbds
   102	
   103	#endif // #ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP