libstdc++-v3/testsuite/23_containers/unordered_map/dr761.cc

   1 // { dg-do run { target c++11 } }
   2 // 2008-05-22  Paolo Carlini  <paolo.carlini@oracle.com>
   3 //
   4 // Copyright (C) 2008-2025 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 <unordered_map>
  22 #include <stdexcept>
  23 #include <testsuite_hooks.h>
  24
  25 // DR 761. unordered_map needs an at() member function.
  26 void test01()
  27 {
  28   typedef std::unordered_map<int, double> map_type;
  29
  30   {
  31     map_type m;
  32     m[0] = 1.5;
  33
  34     double& rd = m.at(0);
  35     VERIFY( rd == 1.5 );
  36     try
  37       {
  38         m.at(1);
  39       }
  40     catch(std::out_of_range& obj)
  41       {
  42         // Expected.
  43       }
  44     catch(...)
  45       {
  46         // Failed.
  47         throw;
  48       }
  49   }
  50
  51   {
  52     map_type m;
  53     m[1] = 2.5;
  54     const map_type cm(m);
  55
  56     const double& crd = cm.at(1);
  57     VERIFY( crd == 2.5 );
  58     try
  59       {
  60         cm.at(0);
  61       }
  62     catch(std::out_of_range& obj)
  63       {
  64         // Expected.
  65       }
  66     catch(...)
  67       {
  68         // Failed.
  69         throw;
  70       }
  71   }
  72 }
  73
  74 int main()
  75 {
  76   test01();
  77   return 0;
  78 }