Add Ecma 402 part of the spec

[jessealama]

We don't currently envirion Decimal128 objects as
primitives, so we can't rely on ToPrimitive to work.

[ptomato]

When you copy an abstract operation that already exists, it's customary to mark the parts that changed with <ins> and <del> tags - these show up in the rendering as green-background and struck-out text, respectively.

Also it might be convenient for rendering to have everything in one HTML file — if you want that, you can do <emu-import href="intl-spec.emu"></emu-import> in the main EMU file.

[jessealama]

When you copy an abstract operation that already exists, it's customary to mark the parts that changed with <ins> and <del> tags - these show up in the rendering as green-background and struck-out text, respectively.

Also it might be convenient for rendering to have everything in one HTML file — if you want that, you can do <emu-import href="intl-spec.emu"></emu-import> in the main EMU file.

This is really helpful -- thanks! I didn't know about that option.

Do you have any suggestion for how to specify the algorithm underlying the AO, given that I want to add just one step? When using ecmarkup, all sorts of warnings are generated about undefined operations. That's understandable, but since I'm not changing any of them, it would seem that I need to include all of the definitions (probably recursively going all the way back to the most primitive AOs). Is there a way of making my change without having to do that?

[littledan]

Wasn't there going to be a part of the Intl integration that makes NumberFormat use the Decimal's own precision (ie length of trailing zeroes) by default?

[sffc]

+1, this handles the ToIntlMathematicalValue but it should preserve the Decimal's precision. The following should "just work"

new Intl.NumberFormat("en").format(new Decimal("500.00"))
// should return "500.00"

[jessealama]

I guess the task is to convert some ambient contextual information for the number of desired fractional digits (min & max) into an options bag for a call to toString. I think that can be done. We can make that example work. Where is that information available, though?

[jessealama]

I'm closing this issue for now in favor of discussing things first on an Ecma 402 call. The list of open tasks here is wide open, so a PR is premature.