libstdc++-v3/testsuite/util/native_type/native_hash_set.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 2, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file native_hash_set.hpp
  44  * Contains an adapter to TR1 unordered containers.
  45  */
  46
  47 #ifndef PB_DS_NATIVE_HASH_SET_HPP
  48 #define PB_DS_NATIVE_HASH_SET_HPP
  49
  50 #include <string>
  51 #include <ext/pb_ds/detail/type_utils.hpp>
  52 #include <ext/pb_ds/detail/standard_policies.hpp>
  53 #include <native_type/native_hash_tag.hpp>
  54 #include <io/xml.hpp>
  55 #include <tr1/unordered_set>
  56
  57 namespace __gnu_pbds
  58 {
  59   namespace test
  60   {
  61 #define PB_DS_BASE_C_DEC \
  62     std::tr1::__unordered_set<Key, Hash_Fn, Eq_Fn, \
  63     typename Allocator::template rebind<Key>::other, Cache_Hash>
  64
  65     template<typename Key,
  66              size_t Init_Size = 8,
  67          typename Hash_Fn = typename __gnu_pbds::detail::default_hash_fn<Key>::type,
  68              typename Eq_Fn = std::equal_to<Key>,
  69              typename Less_Fn = std::less<Key>,
  70              typename Allocator = std::allocator<char>, bool Cache_Hash = false
  71              >
  72     class native_hash_set : public PB_DS_BASE_C_DEC
  73     {
  74     private:
  75       typedef PB_DS_BASE_C_DEC base_type;
  76
  77     public:
  78       typedef native_hash_tag container_category;
  79
  80       native_hash_set() : base_type(Init_Size) { }
  81
  82       template<typename It>
  83       native_hash_set(It f, It l) : base_type(f, l) { }
  84
  85       template<typename Pred>
  86       inline size_t
  87       erase_if(Pred pred)
  88       {
  89         size_t ersd = 0;
  90         bool done = false;
  91         while (!done)
  92           {
  93             typename base_type::iterator b_it = base_type::begin();
  94             typename base_type::iterator e_it = base_type::end();
  95             done = true;
  96             while (b_it != e_it)
  97               {
  98                 if (pred(*b_it))
  99                   {
 100                     ++ersd;
 101                     done = false;
 102                     base_type::erase(*b_it);
 103                     b_it = e_it;
 104                   }
 105                 else
 106                   ++b_it;
 107               }
 108           }
 109         return ersd;
 110       }
 111
 112       static std::string
 113       name()
 114       {
 115         return std::string("n_hash_set_")
 116                + (Cache_Hash ? std::string("cah") : std::string("ncah"));
 117       }
 118
 119       static std::string
 120       desc()
 121       {
 122         const std::string cache_hash_desc =
 123         make_xml_tag("cache_hash_code", "value",
 124                      Cache_Hash ? std::string("true") : std::string("false"));
 125
 126         return make_xml_tag("type", "value", "std_tr1_unordered_set",
 127                             cache_hash_desc);
 128       }
 129     };
 130
 131 #undef PB_DS_BASE_C_DEC
 132   } // namespace test
 133 } // namespace __gnu_pbds
 134
 135 #endif