Re: [boost] Re: [any] ostream inserter

From: Sérgio Vale e Pace (svpace.forum_at_[hidden])
Date: 2005-01-26 15:36:36

Tom Widmer wrote:
> Anything is convertible to boost::any, and since you have an operator<<
> for boost::any, it will catch any object that doesn't have a better
> matched operator<< (i.e. any one that doesn't require a user defined
> conversion). If this didn't happen, you'd just get a compiler error when
> you tried to create an any<A>, since creation of that requires
> instantiation of all virtual functions of holder<A>, including the
> ill-formed print member (e.g. no overload matches the call out<<held).

that explains it, thank's
 
> Dispatching to some kind of default call (which might just set failbit
> on the stream, or you could make it configurable) is probably the best
> way to handle this.

could you elaborate on that, what do you mean by defaul call?

> Tom

Sérgio