standard_policies.hpp
Go to the documentation of this file.00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00029
00030
00031
00032
00033
00034
00035
00036
00037
00038
00039
00040
00041
00042
00043
00044
00045
00046
00047 #ifndef PB_DS_STANDARD_POLICIES_HPP
00048 #define PB_DS_STANDARD_POLICIES_HPP
00049
00050 #include <memory>
00051 #include <ext/pb_ds/hash_policy.hpp>
00052 #include <ext/pb_ds/list_update_policy.hpp>
00053 #include <ext/pb_ds/tree_policy.hpp>
00054 #include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp>
00055 #include <ext/pb_ds/trie_policy.hpp>
00056 #include <ext/pb_ds/tag_and_trait.hpp>
00057 #include <tr1/functional>
00058
00059 namespace __gnu_pbds
00060 {
00061 namespace detail
00062 {
00063 template<typename Key>
00064 struct default_hash_fn
00065 {
00066 typedef std::tr1::hash<Key> type;
00067 };
00068
00069 template<typename Key>
00070 struct default_eq_fn
00071 {
00072 typedef std::equal_to<Key> type;
00073 };
00074
00075 enum
00076 {
00077 default_store_hash = false
00078 };
00079
00080 struct default_comb_hash_fn
00081 {
00082 typedef __gnu_pbds::direct_mask_range_hashing<> type;
00083 };
00084
00085 template<typename Comb_Hash_Fn>
00086 struct default_resize_policy
00087 {
00088 private:
00089 typedef typename Comb_Hash_Fn::size_type size_type;
00090
00091 typedef __gnu_pbds::direct_mask_range_hashing<size_type> default_fn;
00092 typedef is_same<default_fn, Comb_Hash_Fn> same_type;
00093 typedef __gnu_pbds::hash_exponential_size_policy<size_type> iftrue;
00094 typedef __gnu_pbds::hash_prime_size_policy iffalse;
00095 typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
00096 typedef typename cond_type::__type size_policy_type;
00097
00098 typedef __gnu_pbds::hash_load_check_resize_trigger<false, size_type> trigger;
00099
00100 public:
00101 typedef __gnu_pbds::hash_standard_resize_policy<size_policy_type, trigger, false, size_type> type;
00102 };
00103
00104 struct default_update_policy
00105 {
00106 typedef __gnu_pbds::move_to_front_lu_policy<> type;
00107 };
00108
00109 template<typename Comb_Probe_Fn>
00110 struct default_probe_fn
00111 {
00112 private:
00113 typedef typename Comb_Probe_Fn::size_type size_type;
00114
00115 typedef __gnu_pbds::direct_mask_range_hashing<size_type> default_fn;
00116 typedef is_same<default_fn, Comb_Probe_Fn> same_type;
00117 typedef __gnu_pbds::linear_probe_fn<size_type> iftrue;
00118 typedef __gnu_pbds::quadratic_probe_fn<size_type> iffalse;
00119 typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
00120
00121 public:
00122 typedef typename cond_type::__type type;
00123 };
00124
00125 template<typename Key>
00126 struct default_trie_e_access_traits;
00127
00128 template<typename Char, class Char_Traits>
00129 struct default_trie_e_access_traits<std::basic_string<Char, Char_Traits, std::allocator<char> > >
00130 {
00131 private:
00132 typedef std::basic_string<Char, Char_Traits, std::allocator<char> > string_type;
00133
00134 public:
00135 typedef __gnu_pbds::string_trie_e_access_traits<string_type> type;
00136 };
00137
00138 }
00139 }
00140
00141 #endif // #ifndef PB_DS_STANDARD_POLICIES_HPP
00142