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

   1 // { dg-options "-Wno-deprecated" }
   2 //
   3 // Copyright (C) 2009-2016 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_set/erase/1.cc, using
  21 // hash_set instead of unordered_set.
  22
  23 #include <hash_set>
  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   bool test __attribute__((unused)) = true;
  60
  61   typedef __gnu_cxx::hash_set<std::string> Set;
  62   typedef Set::iterator       iterator;
  63   typedef Set::const_iterator const_iterator;
  64
  65   Set s1;
  66
  67   s1.insert("because to why");
  68   s1.insert("the stockholm syndrome");
  69   s1.insert("a cereous night");
  70   s1.insert("eeilo");
  71   s1.insert("protean");
  72   s1.insert("the way you are when");
  73   s1.insert("tillsammans");
  74   s1.insert("umbra/penumbra");
  75   s1.insert("belonging (no longer mix)");
  76   s1.insert("one line behind");
  77   VERIFY( s1.size() == 10 );
  78
  79   VERIFY( s1.erase("eeilo") == 1 );
  80   VERIFY( s1.size() == 9 );
  81   iterator it1 = s1.find("eeilo");
  82   VERIFY( it1 == s1.end() );
  83
  84   VERIFY( s1.erase("tillsammans") == 1 );
  85   VERIFY( s1.size() == 8 );
  86   iterator it2 = s1.find("tillsammans");
  87   VERIFY( it2 == s1.end() );
  88
  89   // Must work (see DR 526)
  90   iterator it3 = s1.find("belonging (no longer mix)");
  91   VERIFY( it3 != s1.end() );
  92   VERIFY( s1.erase(*it3) == 1 );
  93   VERIFY( s1.size() == 7 );
  94   it3 = s1.find("belonging (no longer mix)");
  95   VERIFY( it3 == s1.end() );
  96
  97   VERIFY( !s1.erase("abra") );
  98   VERIFY( s1.size() == 7 );
  99
 100   VERIFY( !s1.erase("eeilo") );
 101   VERIFY( s1.size() == 7 );
 102
 103   VERIFY( s1.erase("because to why") == 1 );
 104   VERIFY( s1.size() == 6 );
 105   iterator it4 = s1.find("because to why");
 106   VERIFY( it4 == s1.end() );
 107
 108   iterator it5 = s1.find("umbra/penumbra");
 109   iterator it6 = s1.find("one line behind");
 110   VERIFY( it5 != s1.end() );
 111   VERIFY( it6 != s1.end() );
 112
 113   VERIFY( s1.find("the stockholm syndrome") != s1.end() );
 114   VERIFY( s1.find("a cereous night") != s1.end() );
 115   VERIFY( s1.find("the way you are when") != s1.end() );
 116   VERIFY( s1.find("a cereous night") != s1.end() );
 117
 118   VERIFY( s1.erase(*it5) == 1 );
 119   VERIFY( s1.size() == 5 );
 120   it5 = s1.find("umbra/penumbra");
 121   VERIFY( it5 == s1.end() );
 122
 123   VERIFY( s1.erase(*it6) == 1 );
 124   VERIFY( s1.size() == 4 );
 125   it6 = s1.find("one line behind");
 126   VERIFY( it6 == s1.end() );
 127
 128   iterator it7 = s1.begin();
 129   iterator it8 = it7;
 130   ++it8;
 131   iterator it9 = it8;
 132   ++it9;
 133
 134   VERIFY( s1.erase(*it8) == 1 );
 135   VERIFY( s1.size() == 3 );
 136   VERIFY( ++it7 == it9 );
 137
 138   iterator it10 = it9;
 139   ++it10;
 140   iterator it11 = it10;
 141
 142   VERIFY( s1.erase(*it9) == 1 );
 143   VERIFY( s1.size() == 2 );
 144   VERIFY( ++it10 == s1.end() );
 145
 146   s1.erase(s1.begin());
 147   VERIFY( s1.size() == 1 );
 148   VERIFY( s1.begin() == it11 );
 149
 150   VERIFY( s1.erase(*s1.begin()) == 1 );
 151   VERIFY( s1.size() == 0 );
 152   VERIFY( s1.begin() == s1.end() );
 153 }
 154
 155 int main()
 156 {
 157   test01();
 158   return 0;
 159 }