Hello Mark, Sunday, May 2, 2010, 1:02:36 AM, you wrote:
> On Sat, May 1, 2010 at 1:27 PM, Brendan Eich <[email protected]> wrote: >> On May 1, 2010, at 12:34 PM, Faisal Vali wrote: >> >>> As I read the proposal, I do wish an invoke-like trap had been >>> accepted - but I understand that there were some technicalities that >>> proved unresolvable. >> >> Everyone wants __noSuchMethod__ > I don't. I want proxies instead. ;) By the way, why exactly proxies? And not special meta hooks such as __noSuchMethod__, __construct__, __call__, __get__, __set__ and other? This seems again a bit overloaded, to create first a real object; then to create a proxy for it, and because of we can use the proxy object in all related actions (via hooks get, set, hasOwn, enumerate, fix and other) -- to work after that only with that proxy (and forgot about the original object). Why does committee dislike the special meta methods directly on objects? It seems useful let o = { // called for every reading __get__: function (name) { // }, __set__: funciton (name, value) { // }, // ability to make an object callable __call__: funciton (...args) { // }, // only for not found in // the prototype chain __noSuchMethod__: function (name, args) { var delegate = this.getDelegateFor(name); delegate && delegate.call(this, args); }, __noSuchProperty__: funciton () { // }, getDelegateFor: function (name) { for (let k = this.delegates.length; k--;) { if (typeof this.delegates[k] == "funciton") return this.delegates[k][name]; } return null; } // additional prototypes // for delegation this.delegates: [proto1, proto2] }; o.foo(); // __noSuchMethod__ o.bar; // __get__, __noSuchProperty__ And so on. Yes, it looks like a full Python's copy, but, isn't it convinient and useful? Having simple definition, at the same time still there is stratification of "Meta" and "App" levels. Thus, implementation and standard should say that all __propertyNames__ are reserved to be meta. Dmitry. _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
