1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2018 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 typename _Alloc::template rebind<_VTp> __rebind_v; 66 67 public: 68 typedef typename __rebind_v::other::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 86