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Re: Numbers with leading _

X-seq: zsh-workers 51022
From: Mikael Magnusson <mikachu@xxxxxxxxx>
To: Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
Cc: zsh-workers@xxxxxxx
Subject: Re: Numbers with leading _
Date: Tue, 22 Nov 2022 06:07:34 +0100
Archived-at: <https://zsh.org/workers/51022>
In-reply-to: <1967742464.5626418.1669048026322@mail.virginmedia.com>
List-id: <zsh-workers.zsh.org>
References: <CAHYJk3Q4f+dpwv6GDP=ZXTcjwnBc7GS+vS_G6M4Fso55zv4J6w@mail.gmail.com> <1967742464.5626418.1669048026322@mail.virginmedia.com>

On 11/21/22, Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx> wrote:
>> On 21/11/2022 16:22 Mikael Magnusson <mikachu@xxxxxxxxx> wrote:
>> I was playing with extending hasbraces+xpandbraces to allow _ in
>> numbers via zstrtoul_underscore, and noticed that in normal math
>> context, this happens:
>> % echo $(( _1000 ))
>> 0
>> % a=(1 2 3); echo $a[_1]
>>
>
> That's a reference to the variable $_1 (which obviously isn't set).

Aha, that indeed does make sense now, thanks.
% _1000=5
% echo $(( _1000 ))
5

-- 
Mikael Magnusson

References:
- Numbers with leading _
  - From: Mikael Magnusson
- Re: Numbers with leading _
  - From: Peter Stephenson

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