CLDR-13221 format for currency symbol at decimal point

[macchiati]

Checklist

• Issue filed: https://unicode-org.atlassian.net/browse/CLDR-13221
• Updated PR title and link in previous line to include Issue number

[sffc]

Can the pattern #,##0¤00 ever actually occur in CLDR data? If it can, then we'll need to change the EBNF for number patterns (assuming there is one).

[sffc]

I thought we had an EBNF for these, but I can't find one. These number patterns continue becoming more and more complex to parse. I'm going to need to implement a parser in ICU4X. Before I do that, I would really like to have a formal grammar that I can implement.

[macchiati]

/[0#]¤[0#]/ does not occur in any CLDR data (current or past), so I don't think there is any real compatibility concern.

I think an EBNF is an excellent idea. Please file a ticket for that and we can work on it (for next release).

[sffc]

Some more questions

[sffc]

I thought we had an EBNF for these, but I can't find one. These number patterns continue becoming more and more complex to parse. I'm going to need to implement a parser in ICU4X. Before I do that, I would really like to have a formal grammar that I can implement.

[sffc]

Thank you! This is much better.

I see now what you were trying to do in the table. I think the new table layout is clearer, even though it loses the vertical alignment of the "before" and "after" patterns.

[jira-pull-request-webhook]

Hooray! The files in the branch are the same across the force-push. 😃

~ Your Friendly Jira-GitHub PR Checker Bot

[macchiati]

Need another review because of squash to fix commit message (sigh)