[Webkit-unassigned] [Bug 142424] New: ES6: Iterator toString names should consistent

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142424

            Bug ID: 142424
           Summary: ES6: Iterator toString names should consistent
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: ggaren at apple.com, utatane.tea at gmail.com

* SUMMARY
Iterator Object Names in the spec right now have spaces. In our implementation some do and some don't.

* TEST

  js> "string"[Symbol.iterator]().toString()
  <-  "[object StringIterator]"

  js> (new Map).entries().toString()
  <-  "[object Map Iterator]"

We have Map/Set with spaces, but String/Array without spaces. Also, I don't know what would be expected of "ArgumentsIterator" given it is an internal type.

* SPEC

> 21.1.5.2.2 %StringIteratorPrototype% [ @@toStringTag ]
> The initial value of the @@toStringTag property is the string value "String Iterator".
> 
> 22.1.5.2.2 %ArrayIteratorPrototype% [ @@toStringTag ]
> The initial value of the @@toStringTag property is the string value "Array Iterator".
> 
> 23.1.5.2.2 %MapIteratorPrototype% [ @@toStringTag ]
> The initial value of the @@toStringTag property is the string value "Map Iterator".
> 
> 23.2.5.2.2 %SetIteratorPrototype% [ @@toStringTag ]
> The initial value of the @@toStringTag property is the string value "Set Iterator".

I think it is weird to have spaces. The spec defines "GeneratorFunction" without a space.

Maybe this is something that should change in the spec or be discussed.

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