libstdc++-v3/testsuite/23_containers/unordered_map/insert/array_syntax.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2010-2020 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 // Array version of insert
  21
  22 #include <string>
  23 #include <iterator>
  24 #include <unordered_map>
  25 #include <testsuite_hooks.h>
  26
  27 void test01()
  28 {
  29   typedef std::unordered_map<std::string, int> Map;
  30
  31   Map m;
  32   VERIFY( m.empty() );
  33
  34   m["red"] = 17;
  35   VERIFY( m.size() == 1 );
  36   VERIFY( m.begin()->first == "red" );
  37   VERIFY( m.begin()->second == 17 );
  38   VERIFY( m["red"] == 17 );
  39
  40   m["blue"] = 9;
  41   VERIFY( m.size() == 2 );
  42   VERIFY( m["blue"] == 9 );
  43
  44   m["red"] = 5;
  45   VERIFY( m.size() == 2 );
  46   VERIFY( m["red"] == 5 );
  47   VERIFY( m["blue"] == 9 );
  48 }
  49
  50 int main()
  51 {
  52   test01();
  53   return 0;
  54 }