libstdc++
standard_policies.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2007, 2009, 2011 Free Software Foundation, Inc.
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16 // Under Section 7 of GPL version 3, you are granted additional
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18 // 3.1, as published by the Free Software Foundation.
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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35 
36 /**
37  * @file detail/standard_policies.hpp
38  * Contains standard policies for containers.
39  */
40 
41 #ifndef PB_DS_STANDARD_POLICIES_HPP
42 #define PB_DS_STANDARD_POLICIES_HPP
43 
44 #include <memory>
51 #include <tr1/functional>
52 
53 namespace __gnu_pbds
54 {
55  namespace detail
56  {
57  /// Primary template, default_hash_fn.
58  template<typename Key>
60  {
61  /// Dispatched type.
62  typedef std::tr1::hash<Key> type;
63  };
64 
65  /// Primary template, default_eq_fn.
66  template<typename Key>
68  {
69  /// Dispatched type.
71  };
72 
73  /// Enumeration for default behavior of stored hash data.
74  enum
75  {
76  default_store_hash = false
77  };
78 
79  /// Primary template, default_comb_hash_fn.
81  {
82  /// Dispatched type.
84  };
85 
86  /// Primary template, default_resize_policy.
87  template<typename Comb_Hash_Fn>
89  {
90  private:
91  typedef typename Comb_Hash_Fn::size_type size_type;
92 
94  typedef is_same<default_fn, Comb_Hash_Fn> same_type;
97  typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
98  typedef typename cond_type::__type size_policy_type;
99 
101 
102  public:
103  /// Dispatched type.
104  typedef hash_standard_resize_policy<size_policy_type, trigger,
105  false, size_type> type;
106  };
107 
108  /// Default update policy.
110  {
111  /// Dispatched type.
113  };
114 
115  /// Primary template, default_probe_fn.
116  template<typename Comb_Probe_Fn>
118  {
119  private:
120  typedef typename Comb_Probe_Fn::size_type size_type;
122  typedef is_same<default_fn, Comb_Probe_Fn> same_type;
125  typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
126 
127  public:
128  /// Dispatched type.
129  typedef typename cond_type::__type type;
130  };
131 
132 
133  /// Primary template, default_trie_access_traits.
134  template<typename Key>
135  struct default_trie_access_traits;
136 
137 #define __dtrie_alloc std::allocator<char>
138 #define __dtrie_string std::basic_string<Char, Char_Traits, __dtrie_alloc>
139 
140  /// Partial specialization, default_trie_access_traits.
141  template<typename Char, typename Char_Traits>
142  struct default_trie_access_traits<__dtrie_string>
143  {
144  private:
145  typedef __dtrie_string string_type;
146 
147  public:
148  /// Dispatched type.
150  };
151 
152 #undef __dtrie_alloc
153 #undef __dtrie_string
154 
155  } // namespace detail
156 } // namespace __gnu_pbds
157 
158 #endif // #ifndef PB_DS_STANDARD_POLICIES_HPP