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

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Aug 9 16:52:28 PDT 2015


--- Comment #117 from Saam Barati <saambarati1 at gmail.com> ---
(In reply to comment #115)
> Comment on attachment 258505 [details]
> 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.
> Ohh, I got it. Please take a look if it ok now.

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