131698 2014-04-15 14:56:36 -0700 Simple ES6 feature: Array.from 2016-03-14 12:47:50 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED EasyFix, InRadar P2 Normal --- 1 oliver webkit-unassigned caitp ggaren graouts m.goleb+bugzilla webkit-bug-importer oldest_to_newest 1000967 0 oliver 2014-04-15 14:56:36 -0700 http://people.mozilla.org/~jorendorff/es6-draft.html#sec-22.1.2.1 Should be doable in builtin JS 1000968 1 webkit-bug-importer 2014-04-15 14:56:51 -0700 <rdar://problem/16625961> 1007364 2 graouts 2014-05-07 10:51:46 -0700 Dupe of 130966, landed in http://trac.webkit.org/changeset/167797. *** This bug has been marked as a duplicate of bug 130966 *** 1007369 3 graouts 2014-05-07 10:52:30 -0700 Wrong bug, sorry! 1060749 4 caitp 2015-01-12 19:18:17 -0800 This bug should be simple, but is at least partially blocked on iterators being available. 1060823 5 oliver 2015-01-13 08:10:50 -0800 We support for-of on all currently iterable types, as well as the spread operator so should be either Return [...arguments] Or Return [...source] I can't recall spec of the top of my head 1060959 6 caitp 2015-01-13 15:09:11 -0800 You're correct, for-of and the spread operator are supported for certain types (although strings appear to not be iterable yet in JSC). However, iterator methods seem to be attached via private properties / internal slots, rather than using the well-known symbol @@iterator. The Array.from algorithm uses `GetMethod(items, @@iterator)` to determine whether or not it can use the from-iterable path or the from-array-like path, so an implementation is still sort of blocked on that (or at least blocked on exposing a getter for the private iterator properties to JS builtins, if it is to be implemented in JS). 1060976 7 oliver 2015-01-13 15:42:48 -0800 I would actually say that the hardest part here will be updating the builtins generation logic to support constructor/static functions. The subsequent logic would be to expose (as a private global) the Symbol object, with @@iterator attached. (You'd still need to use for-of. Our internal iterator implementation doesn't match spec behaviour for reasons best summed up as "performance") 1060977 8 oliver 2015-01-13 15:45:48 -0800 note builtin JS can do magical things - look at the js files in builtins/ 1174620 9 ggaren 2016-03-14 12:47:08 -0700 This is done. 1174621 10 ggaren 2016-03-14 12:47:50 -0700 http://trac.webkit.org/changeset/183357