993389 - isGenerator fails for bound functions

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect)

Description

[Asaf Romano (gone)]

var f = function*() { }.bind(this);
f.isGenerator()

returns false.

Comment 1

[Jeff Walden [:Waldo]]

The isGenerator() method is "not a well-motivated reflective operation", so it's not clear it should even exist.  You'd do better to write your code in such a way that you don't even have to ask the question, at least if my understanding of #jslang discussion is correct.

Comment 2

[Asaf Romano (gone)]

Hey Jeff, Do you mind looking at the use case in PlacesTransaction.jsm (the transact method) - isGenerator is used for input validation.

Comment 3

[Asaf Romano (gone)]

ah... http://stackoverflow.com/a/19660350

Comment 4

[Tooru Fujisawa [:arai]]

isGenerator will be removed in bug 1119777, as it works only for legacy generator that will also be removed near future.