libstdc++-v3/testsuite/23_containers/unordered_map/operators/2.cc

   1 // Copyright (C) 2012-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 23.5.4 template class unordered_map
  19
  20 // This test verifies that the value type of a unordered_map need not be
  21 // default copyable.
  22
  23 // { dg-do run { target c++11 } }
  24
  25 #include <unordered_map>
  26 #include <testsuite_hooks.h>
  27 #include <testsuite_rvalref.h>
  28 #include <testsuite_counter_type.h>
  29
  30 struct Mapped
  31 {
  32   Mapped() = default;
  33   explicit Mapped(const Mapped&) = default;
  34 };
  35
  36 struct DefaultConstructibleType
  37 {
  38   int val;
  39
  40   DefaultConstructibleType() : val(123)
  41   {}
  42
  43   DefaultConstructibleType(const DefaultConstructibleType&) = delete;
  44   DefaultConstructibleType(DefaultConstructibleType&&) = delete;
  45
  46   DefaultConstructibleType& operator=(int x)
  47   {
  48     val = x;
  49     return *this;
  50   }
  51 };
  52
  53 void test01()
  54 {
  55   using __gnu_test::rvalstruct;
  56   using __gnu_test::counter_type;
  57
  58   std::unordered_map<int, Mapped> m1;
  59   m1[0] = Mapped();
  60
  61   std::unordered_map<int, rvalstruct> m2;
  62   m2[0] = rvalstruct(13);
  63
  64   std::unordered_map<int, DefaultConstructibleType> m3;
  65   VERIFY( m3[0].val == 123 );
  66   VERIFY( m3.size() == 1 );
  67   m3[0] = 2;
  68   VERIFY( m3[0].val == 2 );
  69
  70   std::unordered_map<counter_type, int,
  71                      __gnu_test::counter_type_hasher> m4;
  72   VERIFY( m4[counter_type(1)] == 0 );
  73   VERIFY( counter_type::specialize_count == 1 );
  74   VERIFY( counter_type::copy_count == 0 );
  75   VERIFY( counter_type::move_count == 1 );
  76
  77   counter_type k(2);
  78   counter_type::reset();
  79
  80   VERIFY( m4[k] == 0 );
  81   VERIFY( counter_type::copy_count == 1 );
  82   VERIFY( counter_type::move_count == 0 );
  83 }
  84
  85 int main()
  86 {
  87   test01();
  88   return 0;
  89 }