Bug 144282 – new super should be a syntax error

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Erik Arvidsson]

http://trac.webkit.org/browser/trunk/LayoutTests/js/script-tests/class-syntax-super.js#L44

shouldNotThrow('x = class extends Base { constructor() { super(); } method() { return new super } }');

This is invalid. `new super` is not allowed.

[Ryosuke Niwa]

*** Bug 144281 has been marked as a duplicate of this bug. ***

[Ryosuke Niwa]

Created attachment 252291 [details]
Fixes the bug

[Joseph Pecoraro]

Comment on attachment 252291 [details]
Fixes the bug

View in context: https://bugs.webkit.org/attachment.cgi?id=252291&action=review

r=me

> Source/JavaScriptCore/ChangeLog:3
> +        ES6 classe: new super is not allowed

Typo: "classe" => "classes"

> Source/JavaScriptCore/parser/Parser.cpp:2527
> +    semanticFailIfTrue(baseIsSuper && newCount, "Cannot new super");

I think there is room for improvement with this error message. The statement "Cannot new super" feels incomplete. Maybe "Cannot use new with super"? "Cannot call super as a constructor"?

[Ryosuke Niwa]

Comment on attachment 252291 [details]
Fixes the bug

View in context: https://bugs.webkit.org/attachment.cgi?id=252291&action=review

>> Source/JavaScriptCore/parser/Parser.cpp:2527
>> +    semanticFailIfTrue(baseIsSuper && newCount, "Cannot new super");
> 
> I think there is room for improvement with this error message. The statement "Cannot new super" feels incomplete. Maybe "Cannot use new with super"? "Cannot call super as a constructor"?

Let's go with "Cannot use new with super".

[Ryosuke Niwa]

Committed r183757: <http://trac.webkit.org/changeset/183757>

[Ryosuke Niwa]

Thanks for the review, Joe!