libstdc++-v3/testsuite/23_containers/list/operations/4.cc

   1 // Copyright (C) 2001, 2004, 2005 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without Pred the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 // 23.2.2.4 list operations [lib.list.ops]
  20
  21 #include <list>
  22 #include <testsuite_hooks.h>
  23
  24 bool test __attribute__((unused)) = true;
  25
  26 // A comparison predicate to order by rightmost digit.  Tracks call counts for
  27 // performance checks.
  28 struct CompLastLt
  29 {
  30   bool operator()(const int x, const int y)
  31   { ++itsCount; return x % 10 < y % 10; }
  32   static int count() { return itsCount; }
  33   static void reset() { itsCount = 0; }
  34   static int itsCount;
  35 };
  36
  37 int CompLastLt::itsCount;
  38
  39 struct CompLastEq
  40 {
  41   bool operator()(const int x, const int y)
  42   { ++itsCount; return x % 10 == y % 10; }
  43   static int count() { return itsCount; }
  44   static void reset() { itsCount = 0; }
  45   static int itsCount;
  46 };
  47
  48 int CompLastEq::itsCount;
  49
  50 // sort(pred) + merge(pred) + unique(pred)
  51 // also checks performance requirements
  52 void
  53 test04()
  54 {
  55   const int A[] = {1, 2, 3, 4, 5, 6};
  56   const int B[] = {12, 15, 13, 14, 11};
  57   const int C[] = {11, 12, 13, 14, 15};
  58   const int D[] = {1, 11, 2, 12, 3, 13, 4, 14, 5, 15, 6};
  59   const int N = sizeof(A) / sizeof(int);
  60   const int M = sizeof(B) / sizeof(int);
  61   const int Q = sizeof(D) / sizeof(int);
  62
  63   std::list<int> list0401(A, A + N);
  64   std::list<int> list0402(B, B + M);
  65   std::list<int> list0403(C, C + M);
  66   std::list<int> list0404(D, D + Q);
  67   std::list<int> list0405(A, A + N);
  68
  69   // sort B
  70   CompLastLt lt;
  71
  72   CompLastLt::reset();
  73   list0402.sort(lt);
  74   VERIFY(list0402 == list0403);
  75
  76   CompLastLt::reset();
  77   list0401.merge(list0402, lt);
  78   VERIFY(list0401 == list0404);
  79 #ifndef _GLIBCXX_DEBUG
  80   VERIFY(lt.count() <= (N + M - 1));
  81 #endif
  82
  83   CompLastEq eq;
  84
  85   CompLastEq::reset();
  86   list0401.unique(eq);
  87   VERIFY(list0401 == list0405);
  88 #ifndef _GLIBCXX_DEBUG
  89   VERIFY(eq.count() == (N + M - 1));
  90 #endif
  91 }
  92
  93 int main()
  94 {
  95   test04();
  96   return 0;
  97 }
  98