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From: Greg Wooledge <wooledg@eeg.ccf.org>
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Subject: Re: Unicode range and enumeration support.
Date: Wed, 18 Dec 2019 15:13:18 -0500
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On Wed, Dec 18, 2019 at 03:08:20PM -0500, Eli Schwartz wrote:
> So all bash needs to do to print {Z..a} is to take Z == ASCII decimal 90
> and a == ASCII decimal 97, then enumerate the numbers 90-97 and
> translate them into ascii. No locale awareness is needed, no heuristics,
> no invocation of the locale subsystem, you don't even need to hardcode
> the ASCII range in source code.

Until you want to use bash on an EBCDIC system. ;-)

> And that's why bash can support enumerating a range of ASCII characters
> in LC_COLLATE=C order, when it cannot (easily) do so using other locales.

Yup.