> > While you wouldn't use A because it can't express the full semantics of C, > that doesn't mean that many users who currently have to write B wouldn't > prefer to be able to write A. >
Yes - many (most?) users will benefit from being able to write A. But the thrust of my argument is not that there is a net loss to users, but that there's a subtle shift in flexibility going on. See below. > I don't believe that simply allowing a non-literal value as the RHS of <| > would be an adequate solution to your problem (or at least to all similar > problems) For the general case, I agree. I've abandoned this line of thought. > As an alternative you suggest that declarative class syntax would make > your library unnecessary. However, I assume that the same caveat applies > for that syntax as you are applying to the object literal pattern. You > would only use the declarative syntax if it supported the full class > semantics you have chosen to use for your library. > No. I'll be more than happy to use any sane *declarative* class syntax, even without mixins or other features. I think the following analogy will help explain my position: Imagine the underlying facilities for class-like abstraction are the engine of a car, and the programming interface for utilizing those abstractions are the body. ES3 gave us a pretty decent engine, housed inside of a real clunker. But ES3 was flexible, so it gave me the tools to create a shiny new body and to move the engine into that body. ES6 (so far) gives us an even better engine, and this time it's housed in a slightly better-looking body. It's not dented and rusty, but it ain't no hot rod either. But this time around, I'm not able to move that engine into my own custom body - not without giving up a bunch of new features. The more I think about the problem, the more sure I am of the solution: a proper class syntax, and removing the special case of <| where the RHS is a function. kevin
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