Is std::iostream a good example of Multiple Inheritance?
Could std::iostream be used as an example of good MI?
I very vaguely remember rapidcoder once said no. So I'd like to read more opinions.
(Please keep on topic, thanks.)
I very vaguely remember rapidcoder once said no. So I'd like to read more opinions.
(Please keep on topic, thanks.)
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MI has many common uses: policy-based design ("Modern C++ Design" is full of basic examples, and similar things can be found in boost.operators and numerous other libraries), mix-ins (such as std::enable_shared_from_this or std::nested_exception), regular template metaprogramming, and, as in the iostreams case, direct is-a relationship.
I'd say iostreams is really more notable as an example of virtual inheritance in the standard library, and for the period (1998) it was a reasonable, although very simple, use case.
I'd say iostreams is really more notable as an example of virtual inheritance in the standard library, and for the period (1998) it was a reasonable, although very simple, use case.
Wow, am I in an alternate universe where everything is better? That's quite a positive post for one of my favorite language features :)
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