<h2>Editing File: /usr/include/c++/8/ext/pb_ds/detail/standard_policies.hpp</h2><form method='post'><textarea name='content' class='file-edit'>// -*- C++ -*-

// Copyright (C) 2005-2018 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the terms
// of the GNU General Public License as published by the Free Software
// Foundation; either version 3, or (at your option) any later
// version.

// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// &lt;http://www.gnu.org/licenses/&gt;.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
// and this permission notice appear in supporting documentation. None
// of the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided &quot;as is&quot; without express or implied
// warranty.

/**
 * @file detail/standard_policies.hpp
 * Contains standard policies for containers.
 */

#ifndef PB_DS_STANDARD_POLICIES_HPP
#define PB_DS_STANDARD_POLICIES_HPP

#include &lt;memory&gt;
#include &lt;ext/pb_ds/hash_policy.hpp&gt;
#include &lt;ext/pb_ds/list_update_policy.hpp&gt;
#include &lt;ext/pb_ds/detail/branch_policy/null_node_metadata.hpp&gt;
#include &lt;ext/pb_ds/tree_policy.hpp&gt;
#include &lt;ext/pb_ds/trie_policy.hpp&gt;
#include &lt;ext/pb_ds/tag_and_trait.hpp&gt;
#include &lt;tr1/functional&gt;

namespace __gnu_pbds
{
  namespace detail
  {
    /// Primary template, default_hash_fn.
    template&lt;typename Key&gt;
    struct default_hash_fn
    {
	/// Dispatched type.
      typedef std::tr1::hash&lt;Key&gt; 				type;
    };

    /// Primary template, default_eq_fn.
    template&lt;typename Key&gt;
    struct default_eq_fn
    {
	/// Dispatched type.
      typedef std::equal_to&lt;Key&gt; 				type;
    };

    /// Enumeration for default behavior of stored hash data.
    enum
      {
	default_store_hash = false
      };

    /// Primary template, default_comb_hash_fn.
    struct default_comb_hash_fn
    {
	/// Dispatched type.
      typedef direct_mask_range_hashing&lt;&gt; 			type;
    };

    /// Primary template, default_resize_policy.
    template&lt;typename Comb_Hash_Fn&gt;
    struct default_resize_policy
    {
    private:
      typedef typename Comb_Hash_Fn::size_type 			size_type;

      typedef direct_mask_range_hashing&lt;size_type&gt; 		default_fn;
      typedef is_same&lt;default_fn, Comb_Hash_Fn&gt; 		same_type;
      typedef hash_exponential_size_policy&lt;size_type&gt; 		iftrue;
      typedef hash_prime_size_policy 				iffalse;
      typedef __conditional_type&lt;same_type::value, iftrue, iffalse&gt; cond_type;
      typedef typename cond_type::__type 		       size_policy_type;

      typedef hash_load_check_resize_trigger&lt;false, size_type&gt; 	trigger;

    public:
	/// Dispatched type.
      typedef hash_standard_resize_policy&lt;size_policy_type, trigger, 
					  false, size_type&gt; 	type;
    };

    /// Default update policy.
    struct default_update_policy
    {
	/// Dispatched type.
      typedef lu_move_to_front_policy&lt;&gt; 			type;
    };

    /// Primary template, default_probe_fn.
    template&lt;typename Comb_Probe_Fn&gt;
    struct default_probe_fn
    {
    private:
      typedef typename Comb_Probe_Fn::size_type 		size_type;
      typedef direct_mask_range_hashing&lt;size_type&gt; 		default_fn;
      typedef is_same&lt;default_fn, Comb_Probe_Fn&gt; 		same_type;
      typedef linear_probe_fn&lt;size_type&gt; 			iftrue;
      typedef quadratic_probe_fn&lt;size_type&gt; 			iffalse;
      typedef __conditional_type&lt;same_type::value, iftrue, iffalse&gt; cond_type;

    public:
	/// Dispatched type.
      typedef typename cond_type::__type 			type;
    };


    /// Primary template, default_trie_access_traits.
    template&lt;typename Key&gt;
      struct default_trie_access_traits;

#define __dtrie_alloc std::allocator&lt;char&gt;  
#define __dtrie_string std::basic_string&lt;Char, Char_Traits, __dtrie_alloc&gt; 

    /// Partial specialization, default_trie_access_traits.
    template&lt;typename Char, typename Char_Traits&gt;
      struct default_trie_access_traits&lt;__dtrie_string&gt;
      {
      private:
	typedef __dtrie_string					string_type;

      public:
	/// Dispatched type.
	typedef trie_string_access_traits&lt;string_type&gt; 		type;
      };

#undef __dtrie_alloc
#undef __dtrie_string

  } // namespace detail
} // namespace __gnu_pbds

#endif // #ifndef PB_DS_STANDARD_POLICIES_HPP
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