Bug 222526

Summary:	[JSC] Default constructor definition is changing
Product:	WebKit	Reporter:	Yusuke Suzuki <ysuzuki>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	NEW
Severity:	Normal	CC:	ashvayka, webkit-bug-importer, ysuzuki
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Yusuke Suzuki

Reported 2021-02-28 00:55:50 PST

https://github.com/tc39/ecma262/pull/2216

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Yusuke Suzuki

Comment 1 2021-02-28 00:57:50 PST

https://github.com/tc39/ecma262/issues/2212 Interesting.

Yusuke Suzuki

Comment 2 2021-02-28 01:32:30 PST

We should introduce @tailConstructForwardArguments. function() { return @tailConstructForwardArguments(@getPrototypeOf(@callee)), this); } Why can it happen? We do not need to check |this| when finishing this constructor since 1. we can ensure that we are always calling the super 2. we can ensure that we call super only once

Yusuke Suzuki

Comment 3 2021-02-28 01:59:12 PST

In this way, we can completely eliminate allocation for this default constructor, which is good ;)

Radar WebKit Bug Importer

Comment 4 2021-03-07 00:56:13 PST

<rdar://problem/75143301>

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