Bug 18058 - JS feature request: __noSuchMethod__
: JS feature request: __noSuchMethod__
Product: WebKit
Classification: Unclassified
Component: JavaScriptCore
: 523.x (Safari 3)
: Macintosh Mac OS X 10.5
: P2 Enhancement
Assigned To: Nobody
: InRadar, ReviewedForRadar
Depends on:
  Show dependency treegraph
Reported: 2008-03-24 21:35 PDT by Darryl McAdams
Modified: 2010-06-15 07:26 PDT (History)
16 users (show)

See Also:

A proposal to the ECMA committee to add 'noSuchMethod' support (3.74 KB, text/plain)
2009-08-31 11:44 PDT, William J. Edney
no flags Details
A testcase demonstrating 'proper' __noSuchMethod__ capability. (1.56 KB, text/html)
2009-08-31 11:45 PDT, William J. Edney
no flags Details

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Description Darryl McAdams 2008-03-24 21:35:11 PDT
It'd be incredibly awesome if __noSuchMethod__ were implemented in WebKit's version of JS.
Comment 2 Mark Rowe (bdash) 2008-03-24 22:31:48 PDT
Comment 3 William J. Edney 2009-08-31 11:43:01 PDT
I'm gonna poke this bug and add myself to it.

I've been bugging the V8 crowd to add this to their engine:


so I'll bug you all to add it to Nitro :-). They have a small patch ready and I've tested it successfully, so maybe we can get some friendly competition here :-D.

A bit of background: as I stated on the V8 bug report, I'm the guy that originally pestered Brendan Eich back in 2003 to add this capability to Spidermonkey:


Since he's done that, it's also been included in the Java-based Rhino engine. I've also proposed this extension to the ECMA committee.

I'll attach 2 files to this bug report. One is the proposal that my business partner and I made to the ECMA committee to add 'noSuchMethod' to ECMAScript. The other is a pretty comprehensive set of tests, both one from Brendan and a more complex one from my business partner Scott.

There is a pretty compelling case for adding this to your interpreter and that is spelled out in the ECMA proposal document.

Thanks for your consideration!


- Bill
Comment 4 William J. Edney 2009-08-31 11:44:24 PDT
Created attachment 38825 [details]
A proposal to the ECMA committee to add 'noSuchMethod' support
Comment 5 William J. Edney 2009-08-31 11:45:18 PDT
Created attachment 38826 [details]
A testcase demonstrating 'proper' __noSuchMethod__ capability.
Comment 6 William J. Edney 2009-09-01 04:25:22 PDT
This feature now has a 'bottle of your favorite wine' bounty attached to it :-).

I've had success with such bribery over on the Mozilla project (and, yes, have paid it off - seriously...) :-).

In addition, I'm willing to help in authoring tests, etc. My C skills are very lacking (its been quite a number of years), but I do JS all day long, every day.

Having this feature would allow me to significantly reduce my code size and complexity, so I'm very eager to help make this reality :-).


- Bill
Comment 7 Patrick Mueller 2009-12-07 16:40:17 PST
A proposal for "catch-all proxies" has just been posted to the ES Wiki:

Comment 8 Oliver Hunt 2010-03-03 11:51:18 PST
__noSuchMethod__ is an effectively dead extension in spidermonkey, it is not being proposed for standardisation.  To quote Brendan: "http://wiki.ecmascript.org/doku.php?id=harmony:proxies is the future"
Comment 9 Brendan Eich 2010-03-03 11:54:05 PST
BTW, http://wiki.ecmascript.org/doku.php?id=harmony:proxies is implemented (useful for spec improvement, necessary by agreement in TC39 -- so a JSC impl would be helpful) for SpiderMonkey, see


This will probably land soon, and wind up in the next major Firefox release.