libstdc++
binary_heap_/find_fn_imps.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2014 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
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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; }