libstdc++-v3/testsuite/23_containers/list/operations/1.h

   1 // Copyright (C) 2001-2019 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 3, 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 even 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 23.2.2.4 list operations [lib.list.ops]
  19
  20 #include <testsuite_hooks.h>
  21
  22 // splice(p, x) + remove + reverse
  23 template<typename _Tp>
  24 void
  25 operations01()
  26 {
  27   typedef _Tp list_type;
  28   typedef typename list_type::iterator iterator;
  29
  30   const int K = 417;
  31   const int A[] = {1, 2, 3, 4, 5};
  32   const int B[] = {K, K, K, K, K};
  33   const std::size_t N = sizeof(A) / sizeof(int);
  34   const std::size_t M = sizeof(B) / sizeof(int);
  35
  36   list_type list0101(A, A + N);
  37   list_type list0102(B, B + M);
  38   iterator p = list0101.begin();
  39
  40   VERIFY(list0101.size() == N);
  41   VERIFY(list0102.size() == M);
  42
  43   ++p;
  44   list0101.splice(p, list0102); // [1 K K K K K 2 3 4 5]
  45   VERIFY(list0101.size() == N + M);
  46   VERIFY(list0102.size() == 0);
  47
  48   // remove range from middle
  49   list0101.remove(K);
  50   VERIFY(list0101.size() == N);
  51
  52   // remove first element
  53   list0101.remove(1);
  54   VERIFY(list0101.size() == N - 1);
  55
  56   // remove last element
  57   list0101.remove(5);
  58   VERIFY(list0101.size() == N - 2);
  59
  60   // reverse
  61   list0101.reverse();
  62   p = list0101.begin();
  63   VERIFY(*p == 4); ++p;
  64   VERIFY(*p == 3); ++p;
  65   VERIFY(*p == 2); ++p;
  66   VERIFY(p == list0101.end());
  67 }