159 lines
4.9 KiB
C++
159 lines
4.9 KiB
C++
// -*- C++ -*-
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// Copyright (C) 2005-2022 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file detail/standard_policies.hpp
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* Contains standard policies for containers.
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*/
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#ifndef PB_DS_STANDARD_POLICIES_HPP
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#define PB_DS_STANDARD_POLICIES_HPP
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#include <memory>
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#include <ext/pb_ds/hash_policy.hpp>
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#include <ext/pb_ds/list_update_policy.hpp>
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#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
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#include <ext/pb_ds/tree_policy.hpp>
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#include <ext/pb_ds/trie_policy.hpp>
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#include <ext/pb_ds/tag_and_trait.hpp>
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#include <tr1/functional>
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namespace __gnu_pbds
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{
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namespace detail
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{
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/// Primary template, default_hash_fn.
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template<typename Key>
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struct default_hash_fn
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{
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/// Dispatched type.
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typedef std::tr1::hash<Key> type;
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};
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/// Primary template, default_eq_fn.
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template<typename Key>
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struct default_eq_fn
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{
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/// Dispatched type.
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typedef std::equal_to<Key> type;
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};
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/// Enumeration for default behavior of stored hash data.
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enum
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{
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default_store_hash = false
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};
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/// Primary template, default_comb_hash_fn.
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struct default_comb_hash_fn
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{
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/// Dispatched type.
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typedef direct_mask_range_hashing<> type;
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};
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/// Primary template, default_resize_policy.
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template<typename Comb_Hash_Fn>
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struct default_resize_policy
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{
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private:
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typedef typename Comb_Hash_Fn::size_type size_type;
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typedef direct_mask_range_hashing<size_type> default_fn;
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typedef is_same<default_fn, Comb_Hash_Fn> same_type;
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typedef hash_exponential_size_policy<size_type> iftrue;
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typedef hash_prime_size_policy iffalse;
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typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
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typedef typename cond_type::__type size_policy_type;
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typedef hash_load_check_resize_trigger<false, size_type> trigger;
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public:
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/// Dispatched type.
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typedef hash_standard_resize_policy<size_policy_type, trigger,
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false, size_type> type;
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};
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/// Default update policy.
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struct default_update_policy
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{
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/// Dispatched type.
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typedef lu_move_to_front_policy<> type;
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};
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/// Primary template, default_probe_fn.
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template<typename Comb_Probe_Fn>
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struct default_probe_fn
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{
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private:
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typedef typename Comb_Probe_Fn::size_type size_type;
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typedef direct_mask_range_hashing<size_type> default_fn;
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typedef is_same<default_fn, Comb_Probe_Fn> same_type;
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typedef linear_probe_fn<size_type> iftrue;
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typedef quadratic_probe_fn<size_type> iffalse;
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typedef __conditional_type<same_type::value, iftrue, iffalse> cond_type;
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public:
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/// Dispatched type.
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typedef typename cond_type::__type type;
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};
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/// Primary template, default_trie_access_traits.
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template<typename Key>
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struct default_trie_access_traits;
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#define __dtrie_alloc std::allocator<char>
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#define __dtrie_string std::basic_string<Char, Char_Traits, __dtrie_alloc>
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/// Partial specialization, default_trie_access_traits.
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template<typename Char, typename Char_Traits>
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struct default_trie_access_traits<__dtrie_string>
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{
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private:
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typedef __dtrie_string string_type;
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public:
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/// Dispatched type.
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typedef trie_string_access_traits<string_type> type;
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};
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#undef __dtrie_alloc
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#undef __dtrie_string
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} // namespace detail
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} // namespace __gnu_pbds
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#endif // #ifndef PB_DS_STANDARD_POLICIES_HPP
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