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cat -n /usr/include/c++/15/ext/pb_ds/detail/binary_heap_/entry_cmp.hpp

     1	// -*- C++ -*-
     2	
     3	// Copyright (C) 2005-2025 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 binary_heap_/entry_cmp.hpp
    38	 * Contains an implementation class for a binary_heap.
    39	 */
    40	
    41	#ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP
    42	#define PB_DS_BINARY_HEAP_ENTRY_CMP_HPP
    43	
    44	namespace __gnu_pbds
    45	{
    46	  namespace detail
    47	  {
    48	    /// Entry compare, primary template.
    49	    template<typename _VTp, typename Cmp_Fn, typename _Alloc, bool No_Throw>
    50	      struct entry_cmp;
    51	
    52	    /// Specialization, true.
    53	    template<typename _VTp, typename Cmp_Fn, typename _Alloc>
    54	      struct entry_cmp<_VTp, Cmp_Fn, _Alloc, true>
    55	      {
    56		/// Compare.
    57		typedef Cmp_Fn 						type;
    58	      };
    59	
    60	    /// Specialization, false.
    61	    template<typename _VTp, typename Cmp_Fn, typename _Alloc>
    62	      struct entry_cmp<_VTp, Cmp_Fn, _Alloc, false>
    63	      {
    64	      private:
    65		typedef rebind_traits<_Alloc, _VTp>		__rebind_v;
    66	
    67	      public:
    68		typedef typename __rebind_v::const_pointer	entry;
    69	
    70		/// Compare plus entry.
    71		struct type : public Cmp_Fn
    72		{
    73		  type() { }
    74	
    75		  type(const Cmp_Fn& other) : Cmp_Fn(other) { }
    76	
    77		  bool
    78		  operator()(entry lhs, entry rhs) const
    79		  { return Cmp_Fn::operator()(*lhs, *rhs); }
    80		};
    81	      };
    82	  } // namespace detail
    83	} // namespace __gnu_pbds
    84	
    85	#endif // #ifndef PB_DS_BINARY_HEAP_ENTRY_CMP_HPP