libstdc++-v3/testsuite/backward/hash_map/25896.cc

   1 // { dg-options "-Wno-deprecated" }
   2
   3 // Copyright (C) 2009-2024 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
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10 //
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // This is a copy of tr1/6_containers/unordered_map/erase/1.cc, using
  21 // hash_map instead of unordered_map.
  22
  23 #include <hash_map>
  24 #include <string>
  25 #include <testsuite_hooks.h>
  26
  27 namespace __gnu_cxx
  28 {
  29   using std::string;
  30
  31   inline size_t hash_string(const char* s)
  32   {
  33     unsigned long h;
  34     for (h=0; *s; ++s) {
  35       h = 5*h + *s;
  36     }
  37     return size_t(h);
  38   }
  39
  40   template<class T> struct hash<T *>
  41   {
  42     size_t operator()(const T *const & s) const
  43       { return reinterpret_cast<size_t>(s); }
  44   };
  45
  46   template<> struct hash<string>
  47   {
  48     size_t operator()(const string &s) const { return hash_string(s.c_str()); }
  49   };
  50
  51   template<> struct hash<const string>
  52   {
  53     size_t operator()(const string &s) const { return hash_string(s.c_str()); }
  54   };
  55 }
  56
  57 void test01()
  58 {
  59   typedef __gnu_cxx::hash_map<std::string, int> Map;
  60   typedef Map::iterator       iterator;
  61   typedef Map::const_iterator const_iterator;
  62   typedef Map::value_type     value_type;
  63
  64   Map m1;
  65
  66   m1.insert(value_type("because to why", 1));
  67   m1.insert(value_type("the stockholm syndrome", 2));
  68   m1.insert(value_type("a cereous night", 3));
  69   m1.insert(value_type("eeilo", 4));
  70   m1.insert(value_type("protean", 5));
  71   m1.insert(value_type("the way you are when", 6));
  72   m1.insert(value_type("tillsammans", 7));
  73   m1.insert(value_type("umbra/penumbra", 8));
  74   m1.insert(value_type("belonging (no longer mix)", 9));
  75   m1.insert(value_type("one line behind", 10));
  76   VERIFY( m1.size() == 10 );
  77
  78   VERIFY( m1.erase("eeilo") == 1 );
  79   VERIFY( m1.size() == 9 );
  80   iterator it1 = m1.find("eeilo");
  81   VERIFY( it1 == m1.end() );
  82
  83   VERIFY( m1.erase("tillsammans") == 1 );
  84   VERIFY( m1.size() == 8 );
  85   iterator it2 = m1.find("tillsammans");
  86   VERIFY( it2 == m1.end() );
  87
  88   // Must work (see DR 526)
  89   iterator it3 = m1.find("belonging (no longer mix)");
  90   VERIFY( it3 != m1.end() );
  91   VERIFY( m1.erase(it3->first) == 1 );
  92   VERIFY( m1.size() == 7 );
  93   it3 = m1.find("belonging (no longer mix)");
  94   VERIFY( it3 == m1.end() );
  95
  96   VERIFY( !m1.erase("abra") );
  97   VERIFY( m1.size() == 7 );
  98
  99   VERIFY( !m1.erase("eeilo") );
 100   VERIFY( m1.size() == 7 );
 101
 102   VERIFY( m1.erase("because to why") == 1 );
 103   VERIFY( m1.size() == 6 );
 104   iterator it4 = m1.find("because to why");
 105   VERIFY( it4 == m1.end() );
 106
 107   iterator it5 = m1.find("umbra/penumbra");
 108   iterator it6 = m1.find("one line behind");
 109   VERIFY( it5 != m1.end() );
 110   VERIFY( it6 != m1.end() );
 111
 112   VERIFY( m1.find("the stockholm syndrome") != m1.end() );
 113   VERIFY( m1.find("a cereous night") != m1.end() );
 114   VERIFY( m1.find("the way you are when") != m1.end() );
 115   VERIFY( m1.find("a cereous night") != m1.end() );
 116
 117   VERIFY( m1.erase(it5->first) == 1 );
 118   VERIFY( m1.size() == 5 );
 119   it5 = m1.find("umbra/penumbra");
 120   VERIFY( it5 == m1.end() );
 121
 122   VERIFY( m1.erase(it6->first) == 1 );
 123   VERIFY( m1.size() == 4 );
 124   it6 = m1.find("one line behind");
 125   VERIFY( it6 == m1.end() );
 126
 127   iterator it7 = m1.begin();
 128   iterator it8 = it7;
 129   ++it8;
 130   iterator it9 = it8;
 131   ++it9;
 132
 133   VERIFY( m1.erase(it8->first) == 1 );
 134   VERIFY( m1.size() == 3 );
 135   VERIFY( ++it7 == it9 );
 136
 137   iterator it10 = it9;
 138   ++it10;
 139   iterator it11 = it10;
 140
 141   VERIFY( m1.erase(it9->first) == 1 );
 142   VERIFY( m1.size() == 2 );
 143   VERIFY( ++it10 == m1.end() );
 144
 145   m1.erase(m1.begin());
 146   VERIFY( m1.size() == 1 );
 147   VERIFY( m1.begin() == it11 );
 148
 149   VERIFY( m1.erase(m1.begin()->first) == 1 );
 150   VERIFY( m1.size() == 0 );
 151   VERIFY( m1.begin() == m1.end() );
 152 }
 153
 154 int main()
 155 {
 156   test01();
 157   return 0;
 158 }