[boost] Re: Proposal for any_cast to references

[Unai Uribarri Rodríguez]

I propose to implement any_cast<A&>(x) and any_cast<A*>(x) with the semantics of dynamic_cast. That is, if x has type A, any_cast<A&>(x) returns a reference to the content of x and any_cast<A*>(x) returns a pointer to the content of x. Else, any_cast<A&>(x) throws bad_any_cast and any_cast<A*>(x) returns the NULL pointer.

any_cast<A>(X) will work the semantics of static_cast, that is, returns a copy of the content of x.


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