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Re: Unicode range and enumeration support.

From: Eli Schwartz
Subject: Re: Unicode range and enumeration support.
Date: Wed, 18 Dec 2019 15:28:25 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0

On 12/18/19 3:13 PM, Greg Wooledge wrote:
> 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. ;-)

Oof, that was mean. :p (Also, why does this still exist.)

(But I guess we all realize that this just means bash needs to rely on
the existing support for translating the ASCII locale, and still doesn't
need to enumerate a lookup code of characters for this especial purpose.)

>> 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.

Eli Schwartz
Arch Linux Bug Wrangler and Trusted User

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