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

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2019 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/unordered_map>
  21 #include <testsuite_hooks.h>
  22
  23 auto is_odd_pair = [](const std::pair<const int, std::string>& p)
  24 {
  25   return p.first % 2 != 0;
  26 };
  27
  28 void
  29 test01()
  30 {
  31   std::unordered_map<int, std::string> um{ { 10, "A" }, { 11, "B" },
  32                                            { 12, "C" }, { 14, "D" },
  33                                            { 15, "E" }, { 17, "F" },
  34                                            { 18, "G" }, { 19, "H" } };
  35   std::experimental::erase_if(um, is_odd_pair);
  36   std::unordered_map<int, std::string> t{ { 10, "A" }, { 12, "C" },
  37                                           { 14, "D" }, { 18, "G" } };
  38   VERIFY( um == t );
  39 }
  40
  41 void
  42 test02()
  43 {
  44   std::unordered_multimap<int, std::string> umm{ { 20, "S" }, { 21, "T" },
  45                                                  { 22, "U" }, { 22, "V" },
  46                                                  { 23, "W" }, { 23, "X" },
  47                                                  { 24, "Y" }, { 25, "Z" } };
  48   std::experimental::erase_if(umm, is_odd_pair);
  49   std::unordered_multimap<int, std::string> t{ { 20, "S" }, { 22, "U" },
  50                                                { 22, "V" }, { 24, "Y" } };
  51   VERIFY( umm == t );
  52 }
  53
  54 int
  55 main()
  56 {
  57   test01();
  58   test02();
  59
  60   return 0;
  61 }