[Webkit-unassigned] [Bug 152721] Spread operator should be allowed when not the first argument of parameter list

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152721

--- Comment #3 from Joseph Pecoraro <joepeck at webkit.org> ---
Created attachment 268588
  --> https://bugs.webkit.org/attachment.cgi?id=268588&action=review
Incomplete Patch

Passing on to Keith. This WIP changes the parser to parse argument lists allowing for multiple spread arguments:

> ArgumentList[Yield] :
>     AssignmentExpression[In, ?Yield]
>     ... AssignmentExpression[In, ?Yield]
>     ArgumentList[?Yield] , AssignmentExpression[In, ?Yield]
>     ArgumentList[?Yield] , ... AssignmentExpression[In, ?Yield]

But I didn't make any progress inside of BytecodeGenerator::emitCall, which will need to then convert the ArgumentList of expressions which may now include multiple Spread Expressions into a var args call.

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