define new iterators

[PengYu.UT]

Hi,

I have to define a composite class. I'm wondering if there are any easy
way to define its corresponding iterator class. Can I inherent the
iterator from some library?

Best wishes,
Peng

 

[Alipha]

Hi,

I have to define a composite class. I'm wondering if there are any easy
way to define its corresponding iterator class. Can I inherent the
iterator from some library?

Best wishes,
Peng

you should almost always inherit from std::iterator to have the
appropriate typedefs created for you and so that std::iterator_traits
will work for your class. but no functions are generated for you; you
have to write them yourself. however, boost (www.boost.org) has
iterator adapter and facet (sp?) classes, which (supposably) make it
easier to create iterators (once you understand how to use them).