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

   1 // Copyright (C) 2012-2025 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 // This test verifies that the value type of a map need not be default copyable.
  19
  20 // { dg-do run { target c++11 } }
  21
  22 #include <map>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_rvalref.h>
  25 #include <testsuite_counter_type.h>
  26
  27 struct Mapped
  28 {
  29   Mapped() = default;
  30   explicit Mapped(const Mapped&) = default;
  31 };
  32
  33 struct DefaultConstructibleType
  34 {
  35   int val;
  36
  37   DefaultConstructibleType() : val(123)
  38   {}
  39
  40   DefaultConstructibleType(const DefaultConstructibleType&) = delete;
  41   DefaultConstructibleType(DefaultConstructibleType&&) = delete;
  42
  43   DefaultConstructibleType& operator=(int x)
  44   {
  45     val = x;
  46     return *this;
  47   }
  48 };
  49
  50 void test01()
  51 {
  52   using __gnu_test::rvalstruct;
  53   using __gnu_test::counter_type;
  54
  55   std::map<int, Mapped> m1;
  56   m1[0] = Mapped();
  57
  58   std::map<int, rvalstruct> m2;
  59   m2[0] = rvalstruct(13);
  60
  61   std::map<int, DefaultConstructibleType> m3;
  62   VERIFY( m3[0].val == 123 );
  63   VERIFY( m3.size() == 1 );
  64   m3[0] = 2;
  65   VERIFY( m3[0].val == 2 );
  66
  67   std::map<counter_type, int> m4;
  68   VERIFY( m4[counter_type(1)] == 0 );
  69   VERIFY( counter_type::specialize_count == 1 );
  70   VERIFY( counter_type::copy_count == 0 );
  71   VERIFY( counter_type::move_count == 1 );
  72
  73   counter_type k(2);
  74   counter_type::reset();
  75
  76   VERIFY( m4[k] == 0 );
  77   VERIFY( counter_type::copy_count == 1 );
  78   VERIFY( counter_type::move_count == 0 );
  79 }
  80
  81 int main()
  82 {
  83   test01();
  84   return 0;
  85 }