libstdc++-v3/testsuite/24_iterators/move_iterator/dr3265.cc

   1 // Copyright (C) 2020-2021 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 // { dg-do compile { target c++11 } }
  19
  20 #include <iterator>
  21
  22 struct Iter
  23 {
  24   using iterator_category = std::forward_iterator_tag;
  25   using value_type = int;
  26   using pointer = int*;
  27   using reference = int&;
  28   using difference_type = std::ptrdiff_t;
  29
  30   Iter();
  31
  32   // Construction from int* is not valid:
  33   Iter(int*) = delete;
  34
  35   // Assignment from int* is valid:
  36   Iter& operator=(int*);
  37
  38   Iter& operator++();
  39   Iter operator++(int);
  40   int& operator*() const;
  41   int* operator->() const;
  42
  43   template<int N> friend bool operator==(Iter, Iter);
  44 };
  45
  46 void test01()
  47 {
  48   std::move_iterator<Iter> m;
  49   int i = 0;
  50   m = std::make_move_iterator(&i); // Should use assignment not construction
  51 }