[Webkit-unassigned] [Bug 144956] [ES6] Implement ES6 arrow function syntax. Arrow function specific features. Lexical bind of this

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=144956

--- Comment #113 from Saam Barati <saambarati1 at gmail.com> ---
Comment on attachment 258505
  --> https://bugs.webkit.org/attachment.cgi?id=258505
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=258505&action=review

>>> Source/JavaScriptCore/bytecode/BytecodeUseDef.h:119
>>> +    case op_new_arrow_func_exp:
>> 
>> This needs to also report the bound this operand as a use.
> 
> Do you mean that that op_new_arrow_func_exp should have name that report about bound |this|, for instance op_new_arrow_func_exp_with_bound_this? I'm not sure, because arrow function also has lexical |arguments| binding, and |super|, |new.target| as well, so after implementing some of this feature we need to change this name.

No, I mean that the op_new_arrowfunction has two bytecode operands it uses in this patch. 
You need to report those as uses here. For example, you need to have it do:
        functor(codeBlock, instruction, opcodeID, instruction[2].u.operand); // Scope
        functor(codeBlock, instruction, opcodeID, instruction[4].u.operand); // Bound this.

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