Closed
Bug 1040699
Opened 10 years ago
Closed 10 years ago
Remove "group assignment" optimization in destructuring assignment
Categories
(Core :: JavaScript Engine, defect)
Tracking
()
RESOLVED
FIXED
mozilla34
People
(Reporter: Swatinem, Assigned: Swatinem)
References
Details
Attachments
(1 file)
12.57 KB,
patch
|
jorendorff
:
review+
|
Details | Diff | Splinter Review |
From bug 933276 comment 21: (In reply to Jason Orendorff [:jorendorff] from comment #21) > Arpad, I just realized it's necessary to delete the "group assignment" > optimization. > > Try this and you'll see what I mean: > > js> delete Array.prototype["@@iterator"]; > js> (function () { var [x, y] = [1, 2]; })() // should throw TypeError > because Array#@@iterator is gone > js> dis(function () { var [x, y] = [1, 2]; }) > > > Fortunately that should be very easy to delete. Please do it in a separate > patch though, preferably *under* (before) this patch. Right now, we have a special "group assignment" optimization that is triggered when we have an ArrayPattern on the LHS and an ArrayLiteral on the RHS. Bug 933276 will move destructuring assignment over to use @@iterator, as specified in ES6, which collides with this optimization. Removing it and always using the normal destructuring code should make moving to @@iterator a lot easier.
Assignee | ||
Comment 1•10 years ago
|
||
Attachment #8459138 -
Flags: review?(jorendorff)
Comment 2•10 years ago
|
||
Comment on attachment 8459138 [details] [diff] [review] Remove "group assignment" optimization in destructuring assignment Review of attachment 8459138 [details] [diff] [review]: ----------------------------------------------------------------- Thank you.
Updated•10 years ago
|
Attachment #8459138 -
Flags: review?(jorendorff) → review+
Updated•10 years ago
|
Blocks: es6destructuring
Assignee | ||
Comment 3•10 years ago
|
||
http://hg.mozilla.org/integration/mozilla-inbound/rev/3b2046d81e35
Comment 4•10 years ago
|
||
https://hg.mozilla.org/mozilla-central/rev/3b2046d81e35
Status: ASSIGNED → RESOLVED
Closed: 10 years ago
Flags: in-testsuite+
Resolution: --- → FIXED
Target Milestone: --- → mozilla34
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Description
•