AMDG Swerts, Benjamin wrote:
I have a class that is templated on an iterator type. As it only works with bidirectional and random access iterators, I thought I would impose that as follows:
template<typename T> class A { A() { checkIterator(std::iterator_traits<T>::iterator_category()); };
template<typename Tag> void checkIterator( Tag ); void checkIterator( std::bidirectional_iterator_tag ) {}; void checkIterator( std::random_access_iterator_tag ) {}; void checkIterator( boost::random_access_traversal_tag ) {}; };
This works when T is a standard iterator but not when it's one of my iterator_facade subclasses. For example:
class const_iterator : public iterator_facade
When using this class with A
I get a linker error because the checkIterator function is called with: boost::detail::iterator_category_with_traversal
I certainly cannot add a specialization of checkIterator with this tag to class A. Could anyone shed some light on this problem? I'm working with Boost 1.39.0 on MSVC2008SP1.
Try just having a single overload: void checkIterator(std::bidirectional_iterator_tag) {} In Christ, Steven Watanabe