> From: Waldemar Horwat <[email protected]> > Subject: Re: Sep 27 meeting notes > Date: September 30, 2011 23:17:04 GMT+02:00 > To: Brendan Eich <[email protected]> > Cc: es-discuss <[email protected]>, Erik Arvidsson > <[email protected]> > > Without 2, 4, and 5, object initializers are close enough to make having an > extra class facility not carry its weight.
Can you show code that backs up that assertion? (I’m curious, not dismissive.) Wasn’t it David Herman a while ago who listed a minimal feature list? For me it would be: 1. Super property references (mainly methods) 2. Super constructor references 3. Subclassing (mainly wiring the prototypes) 4. Defining a class as compactly as possible (with subclassing, it is painful that one has to assemble so many pieces). 5. Having a standard construct that fosters IDE support. Currently there are too many inheritance APIs out there, making IDE support nearly impossible. 6. A platform on which to build future extensions (traits!). Allen’s object literal extensions give us #1 and #2. His prototype operator gives us #3. #4 can be done via Allen’s pattern or by introducing the methods - Function.prototype.withPrototypeProperties(props) - Function.prototype.withClassProperties(props) I’m not sure about #5 (I’d consider class literals a plus here). #6 can be postponed if we can get 1-5 by other means, but there will be a price to pay if two competing ways of defining classes have to be used in ES.next.next. -- Dr. Axel Rauschmayer [email protected] twitter.com/rauschma home: rauschma.de blog: 2ality.com
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