Meta: Stage 4 Entrance Criteria

[rbuckton]

• Test262 acceptance tests have been written for mainline usage scenarios and merged:
• Two compatible implementations which pass the acceptance tests:
  • SpiderMonkey (tracking bug) — Shipping behind a flag in 92, Intent to ship unflagged in 93:
    
  • V8 (tracking bug) Shipping unflagged (at least as of 9.4.146)
    
• A pull request has been sent to tc39/ecma262 with the integrated spec text.
• The ECMAScript editor has signed off on the pull request.

[rbuckton]

@mgaudet you mentioned that an early version of static {} landed in https://bugzilla.mozilla.org/show_bug.cgi?id=1712138. Is this something I can try in Firefox Nightly? If so, what are the prerequisites to enable support?

[mgaudet]

Setting the pref javascript.options.experimental.class_static_blocks=true should let you play with it; and --enable-class-static-blocks should work on up-to-date shells.

[rbuckton]

Thanks! I'll list it as a implementation above, with the caveat that it is flagged and pending acceptance tests.

[mgaudet]

Awesome. I'll circle back to the updated tests and await behaviour probably sometime early-to-mid July

[mgaudet]

Updated await handling has landed under this bug, and so should be in tomorrow's nightlies.

[rbuckton]

@syg, is there a bug tracking class static blocks for v8? I'll I've found so far are these two referenced in the test262 tests:

• https://bugs.chromium.org/p/v8/issues/detail?id=11718
• https://bugs.chromium.org/p/v8/issues/detail?id=11719

[rbuckton]

Ah nevermind, I found it: https://bugs.chromium.org/p/v8/issues/detail?id=11375

[rbuckton]

@mgaudet, @syg: Where do SpiderMonkey and V8 stand on this feature's readiness for Stage 4? I am currently waiting on editor signoff on the ECMA-262 PR and any further implementer feedback before adding this to the agenda for the August/September meeting.

[syg]

V8 has shipped class static blocks, so it's ready for stage 4 if another browser has also shipped it.

[rbuckton]

V8 has shipped class static blocks, so it's ready for stage 4 if another browser has also shipped it.

Thanks, I've updated the list above.

[mgaudet]

Should ship in Firefox 93 unflagged

[rbuckton]

Stage 4 achieved!