Ticket #10497: bug_any_range.cpp

#include <boost/range/adaptor/type_erased.hpp>
#include <boost/range/adaptor/filtered.hpp>
#include <boost/iterator/iterator_facade.hpp>

#include <iostream>

template <class T>
class NumIterator
  : public boost::iterator_facade <
      NumIterator<T>,
      const T,
      boost::forward_traversal_tag
  >
{
public:
  NumIterator(T value): val_( value ) {}
  NumIterator(const NumIterator &) = default;

private:
  friend class boost::iterator_core_access;
  void increment() { ++val_; }
  bool equal(const NumIterator<T> & itr) const { return val_ == itr.val_; }
  T dereference() const { return val_; }

  T val_;
};

using AnyIntRange = boost::any_range <
  int, boost::forward_traversal_tag, int, std::ptrdiff_t
>;

int main()
{
  auto nrange_filt = boost::make_iterator_range(NumIterator<int>(10), NumIterator<int>(20))
    | boost::adaptors::filtered([](const int n) { return n & 1; });

  AnyIntRange xrange = nrange_filt; // this doesn't compile under G++ v4.8.3

  for(int i : xrange)
    std::cout << i << std::endl;
}