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_/find_fn_imps.hpp 38 * Contains an implementation class for a binary_heap. 39 */ 40 41 PB_DS_CLASS_T_DEC 42 inline typename PB_DS_CLASS_C_DEC::const_reference 43 PB_DS_CLASS_C_DEC:: 44 top() const 45 { 46 PB_DS_ASSERT_VALID((*this)) 47 _GLIBCXX_DEBUG_ASSERT(!empty()); 48 return top_imp(s_no_throw_copies_ind); 49 } 50 51 PB_DS_CLASS_T_DEC 52 inline typename PB_DS_CLASS_C_DEC::const_reference 53 PB_DS_CLASS_C_DEC:: 54 top_imp(true_type) const 55 { return *m_a_entries; } 56 57 PB_DS_CLASS_T_DEC 58 inline typename PB_DS_CLASS_C_DEC::const_reference 59 PB_DS_CLASS_C_DEC:: 60 top_imp(false_type) const 61 { return **m_a_entries; } 62 63 PB_DS_CLASS_T_DEC 64 inline typename PB_DS_CLASS_C_DEC::size_type 65 PB_DS_CLASS_C_DEC:: 66 left_child(size_type i) 67 { return i * 2 + 1; } 68 69 PB_DS_CLASS_T_DEC 70 inline typename PB_DS_CLASS_C_DEC::size_type 71 PB_DS_CLASS_C_DEC:: 72 right_child(size_type i) 73 { return i * 2 + 2; } 74 75 PB_DS_CLASS_T_DEC 76 inline typename PB_DS_CLASS_C_DEC::size_type 77 PB_DS_CLASS_C_DEC:: 78 parent(size_type i) 79 { return (i - 1) / 2; } 80