libstdc++-v3/testsuite/experimental/set/erasure.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2024 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 #include <experimental/set>
  21 #include <testsuite_hooks.h>
  22
  23 auto is_odd = [](const int i) { return i % 2 != 0; };
  24
  25 void
  26 test01()
  27 {
  28   std::set<int> s{ 10, 11, 12, 14, 15, 17, 18, 19 };
  29   std::experimental::erase_if(s, is_odd);
  30   std::set<int> t{ 10, 12, 14, 18 };
  31   VERIFY( s == t );
  32 }
  33
  34 void
  35 test02()
  36 {
  37   std::multiset<int> ms{ 20, 21, 22, 22, 23, 23, 24, 25 };
  38   std::experimental::erase_if(ms, is_odd);
  39   std::multiset<int> t{ 20, 22, 22, 24 };
  40   VERIFY( ms == t );
  41 }
  42
  43 void
  44 test_pr107850()
  45 {
  46   // Predicate only callable as non-const.
  47   struct Pred { bool operator()(const int&) { return false; } };
  48   const Pred pred; // erase_if parameter is passed by value, so non-const.
  49   std::set<int> s;
  50   std::experimental::erase_if(s, pred);
  51   std::multiset<int> ms;
  52   std::experimental::erase_if(ms, pred);
  53 }
  54
  55 int
  56 main()
  57 {
  58   test01();
  59   test02();
  60   test_pr107850();
  61
  62   return 0;
  63 }