libstdc++-v3/testsuite/23_containers/forward_list/modifiers/3.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2008-2021 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 // 23.2.3.n forward_list xxx [lib.forward_list.xxx]
  21
  22 #include <forward_list>
  23 #include <testsuite_hooks.h>
  24
  25 // This test verifies the following:
  26 //   cbegin
  27 //   erase_after one iterator
  28 //   pos is useable and points to current element
  29 void
  30 test01()
  31 {
  32   std::forward_list<int> fl({0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
  33
  34   std::forward_list<int>::const_iterator pos = fl.cbegin();
  35   ++pos;
  36   VERIFY( *pos == 1 );
  37
  38   std::forward_list<int>::iterator pos2 = fl.erase_after(pos);
  39
  40   VERIFY( *pos == 1 );
  41   ++pos;
  42   VERIFY( *pos == 3 );
  43   VERIFY( pos == pos2 );
  44 }
  45
  46 // This test verifies the following:
  47 //   cbegin
  48 //   erase_after iterator range
  49 //   pos is useable and points to current element
  50 void
  51 test02()
  52 {
  53   std::forward_list<int> fl({0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
  54
  55   std::forward_list<int>::const_iterator pos = fl.cbegin();
  56   ++pos;
  57   VERIFY( *pos == 1 );
  58
  59   std::forward_list<int>::iterator stop = fl.begin();
  60   ++stop;
  61   ++stop;
  62   ++stop;
  63   ++stop;
  64   VERIFY( *stop == 4 );
  65
  66   std::forward_list<int>::iterator pos2 = fl.erase_after(pos, stop);
  67
  68   VERIFY( pos2 == stop );
  69   VERIFY( *pos == 1 );
  70   ++pos;
  71   VERIFY( *pos == 4 );
  72   VERIFY( std::distance(fl.begin(), fl.end()) == 8 );
  73
  74   std::forward_list<int>::iterator pos3
  75     = fl.erase_after(pos, fl.end());
  76   VERIFY( pos3 == fl.end() );
  77   VERIFY( ++pos == fl.end() );
  78   VERIFY( std::distance(fl.begin(), fl.end()) == 3 );
  79
  80   std::forward_list<int>::iterator pos4
  81     = fl.erase_after(fl.before_begin(), pos);
  82   VERIFY( pos4 == pos );
  83   VERIFY( std::distance(fl.begin(), fl.end()) == 0 );
  84   VERIFY( fl.empty() );
  85 }
  86
  87 int
  88 main()
  89 {
  90   test01();
  91   test02();
  92   return 0;
  93 }