Re: method overriding

From: Neal Gafter (gafter_at_spamcop.net)
Date: 03/17/04

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    Date: Wed, 17 Mar 2004 02:10:19 GMT

    Chris Uppal wrote:
    > In my opinion the covariant returns are a heavyweight feature (complex
    > semantics, complex implementation, non-obvious side-effects) that should be
    > reserved (if they're used at all) for the cases where they are really *needed*.

    This is the first time I've ever heard covariant returns described in these
    terms. In what way are the semantics complex? What are the non-obvious side
    effects? What is complex about the implementation?

    I can tell you that J2SE 1.5.0 uses covariant returns in a number of places for
    just this purpose.

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