Normative: Update Table 4 Numbering systems

[FrankYFTang]

Add more numbering systems which on CLDR 37

Close #437

[sffc]

Would be good to get sign-off from the browser vendors.

@jswalden @litherum

[FrankYFTang]

@rkirsling - Could you comment about this since you are working on JSC .

[FrankYFTang]

The list I proposed here (except "diak" and "segment") are ALREADY supported by two browser engines already:

• Safari version 13.1
• Chrome / v8 m81

"diak" and "segment" are new in CLDR / ICU and Chrome will support them in m84 with the update to ICU 67.1 .

[rkirsling]

Sounds good to me. JSC is aiming to defer to ICU / CLDR directly as much as possible, even if our pace of updating is slower than than V8's (...on most platforms, due to reliance on system ICU).

[leobalter]

Let's bring this up for the meeting this week.

[sffc]

This has ECMA-402 consensus. We would like to see a more regular process of updating this list, but that doesn't block the current PR. We need to achieve TC39 consensus before it can be merged.

[anba]

So we don't expect any compatibility issues with other software (#437 (comment))?

[sffc]

Is this PR considered editorial or normative? Is it normative because conforming implementations could become non-conforming based on this PR, or is it editorial because it reflects web reality?

[FrankYFTang]

Is this PR considered editorial or normative? Is it normative because conforming implementations could become non-conforming based on this PR, or is it editorial because it reflects web reality?

It is normative because https://ecma-international.org/ecma-402/#sec-partitionnumberpattern stated in step 8.e.iii.3
"If the numberFormat.[[NumberingSystem]] matches one of the values in the "Numbering System" column of Table 3 below, then"

[FrankYFTang]

So.. TC39 reach consensus this morning. @sffc @leobalter @gibson042 could you approve?