libstdc++-v3/testsuite/23_containers/vector/erasure.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3
   4 // Copyright (C) 2018-2019 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <vector>
  22 #include <testsuite_hooks.h>
  23
  24 void
  25 test01()
  26 {
  27   auto is_odd = [](const int i) { return i % 2 != 0; };
  28
  29   std::vector<int> v{ 10, 11, 12, 14, 15, 17, 18, 19 };
  30   auto num = std::erase_if(v, is_odd);
  31   std::vector<int> t{ 10, 12, 14, 18 };
  32   VERIFY( v == t );
  33   VERIFY( num == 4 );
  34 }
  35
  36 void
  37 test02()
  38 {
  39   std::vector<int> v{ 0, 11, 0, 0, 22, 33, 0, 0, 44, 0 };
  40   auto num = std::erase(v, 0);
  41   std::vector<int> t{ 11, 22, 33, 44 };
  42   VERIFY( v == t );
  43   VERIFY( num == 6 );
  44   num = std::erase(v, 55);
  45   VERIFY( v == t );
  46   VERIFY( num == 0 );
  47 }
  48
  49 int
  50 main()
  51 {
  52   test01();
  53   test02();
  54
  55   return 0;
  56 }