Disallow Uppercase Radix Prefixes?

[jashkenas]

There's seems to be some agreement in TC39 that the uppercase forms of radial prefixes are undesirable in general, despite the longstanding existence of 0Xffc...

https://mail.mozilla.org/pipermail/es-discuss/2012-January/019735.html

Since CoffeeScript has no such obligation to JavaScript backwards-compatible syntax, should we simply remove uppercase radix prefixes from the language, only leaving: 0b..., 0o... and 0x... ?

[paulmillr]

never seen them used anywhere in any language, so 👍

[michaelficarra]

+1. I hated adding 0O... for consistency with 0X... and 0B.... Let's remove them all.

[jashkenas]

Great -- feel free to patch and merge then, if anyone has a minute to take a crack at it.

[geraldalewis]

I think I can handle this right after lunch, unless anyone's already done it?

[geraldalewis]

Hmm... What about exponents? 10E2 I say no uppercase allowed there either, for consistency's sake.

[jashkenas]

Yep.

[satyr]

What about hex A to F? Are we restricting them to lower (or upper?) case as well?

[geraldalewis]

What about hex A to F?

I use them, occasionally, precisely because they're not subtle. I have three instances of capitalized hexes in code I wrote just today (magic numbers for parsing font binaries).

OTTO = 0x4F54544F

csa  = 0xB1B0AFBA - checksum

[jashkenas]

Yeah, I think leave hex A-F either way would be fine.

[geraldalewis]

ping @michaelficarra (this can be closed, no?)