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// Copyright (C) 2018-2019 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do run { target c++11 } }
// PR libstdc++/86734
// LWG 1052. reverse_iterator::operator-> should also support smart pointers
// LWG 2775. reverse_iterator is does not compile for fancy pointers
#include <iterator>
#include <testsuite_hooks.h>
void
test01()
{
// Example 1 from LWG 1052
struct X { int m; };
static X x;
struct IterX {
typedef std::bidirectional_iterator_tag iterator_category;
typedef X& reference;
struct pointer
{
pointer(X& v) : value(v) {}
X& value;
X* operator->() const {return &value;}
};
typedef std::ptrdiff_t difference_type;
typedef X value_type;
// additional iterator requirements not important for this issue
reference operator*() const { return x; }
pointer operator->() const { return pointer(x); }
IterX& operator--() {return *this;}
};
std::reverse_iterator<IterX> ix;
VERIFY( &ix->m == &(*ix).m );
}
void
test02()
{
// Example 2 from LWG 1052
struct P {
P() : first(10), second(20.0) { }
int first;
double second;
};
P op;
std::reverse_iterator<P*> ri(&op + 1);
VERIFY( ri->first == 10 );
}
// N.B. Example 3 from LWG 1052 isn't expected to work,
// because a caching iterator like IterX is not a forward iterator.
int
main()
{
test01();
test02();
}
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