libstdc++
entry_cmp.hpp
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3// Copyright (C) 2005-2021 Free Software Foundation, Inc.
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16// Under Section 7 of GPL version 3, you are granted additional
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25// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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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
44namespace __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:
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
GNU extensions for policy-based data structures for public use.
Consistent API for accessing allocator-related types.
Entry compare, primary template.
Definition: entry_cmp.hpp:50