1639591 - Ship logical assignment operators (??=)

Status: RESOLVED FIXED

(Core :: JavaScript Engine, task, P2)

Description

[Jason Orendorff [:jorendorff]]

Implemented in bug 1629106. Ship it.

Comment 1

[Mike Conca [:mconca]]

:anba noted that there is an outstanding spec issue with this. See Promise.Any (which also has an outstanding spec issue) for a discussion of a potential path forward.

Comment 2

[Mike Conca [:mconca]]

(In reply to Mike Conca [:mconca] from comment #1)

:anba noted that there is an outstanding spec issue with this. See Promise.Any (which also has an outstanding spec issue) for a discussion of a potential path forward.

The spec issue is on the agenda for TC39 the first week of June. It would be nice to land this in 78 for ESR, but 78 code freeze happens before TC39. I suppose we could land it now in 78, and uplift any spec changes to beta as a result of TC39, or else wait for TC39, and uplift both the pref flip and any spec changes to beta 78.

Comment 3

[André Bargull [:anba]]

Attachment: Bug 1639591 - Part 1: Assign name to anonymous function for short-circuit assignment. r=yulia!

Comment 4

[André Bargull [:anba]]

Attachment: Bug 1639591 - Part 2: Ship logical assignment operators proposal. r=yulia!

Depends on D77822

Comment 5

[André Bargull [:anba]]

Attachment: Bug 1639591 - Part 3: Re-import test262. r=yulia!

Depends on D77823

Comment 6

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/f15d364b3fec
Part 1: Assign name to anonymous function for short-circuit assignment. r=yulia
https://hg.mozilla.org/integration/autoland/rev/c7e9155860a9
Part 2: Ship logical assignment operators proposal. r=yulia
https://hg.mozilla.org/integration/autoland/rev/f9735776f715
Part 3: Re-import test262. r=yulia

Comment 7

[Bogdan Tara[:bogdan_tara | bogdant]]

https://hg.mozilla.org/mozilla-central/rev/f15d364b3fec
https://hg.mozilla.org/mozilla-central/rev/c7e9155860a9
https://hg.mozilla.org/mozilla-central/rev/f9735776f715

Comment 8

[Florian Scholz (Open Web Docs)]

(In reply to Mike Conca [:mconca] from comment #2)

uplift both the pref flip and any spec changes to beta 78.

For MDN docs and devrel, can you please clarify if this is now indeed uplifted to Fx 78 or not? Thanks!

Comment 9

[Mike Conca [:mconca]]

(In reply to Florian Scholz [:fscholz] (MDN) from comment #8)

(In reply to Mike Conca [:mconca] from comment #2)

uplift both the pref flip and any spec changes to beta 78.

For MDN docs and devrel, can you please clarify if this is now indeed uplifted to Fx 78 or not? Thanks!

It is not uplifted to 78 yet.

Comment 10

[Florian Scholz (Open Web Docs)]

Updated:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence#Table
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators
https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators

New pages:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_nullish_assignment
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_OR_assignment
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_AND_assignment

Compat data:
https://github.com/mdn/browser-compat-data/pull/6363

Fx79 release notes announcement:
https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/79#JavaScript