[Webkit-unassigned] [Bug 149933] New: [ES6] Arrow function syntax. Implement syntactic analysis for arrow function that 'tells' if arrow function use 'this'

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149933

            Bug ID: 149933
           Summary: [ES6] Arrow function syntax. Implement syntactic
                    analysis for arrow function that 'tells' if arrow
                    function use 'this'
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gskachkov at gmail.com

It would be nice to implement syntactic analysis for arrow function that 'tells' if arrow function use 'this'.Something similar to usesThis(). It should check if 'this' or eval is used inside of body arrow function. This property will allow to avoid unnecessary allocations, checks and emits.

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