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Re: Not operator (~) fail on arithmetic expansion.


From: Andreas Schwab
Subject: Re: Not operator (~) fail on arithmetic expansion.
Date: Mon, 28 Nov 2016 09:37:52 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

On Nov 28 2016, John McKown <john.archie.mckown@gmail.com> wrote:

> Not replying for Chet, who will have the definitive answer, I will say that
> I, personally, think that is working as designed. ~ 0 (with space between)
> is definitely the "not" operator. But without the middle space, ~0, where
> there is a white space character in front of the tilde, looks to me like
> the normal "get the home directory for the following id" processing. Eg: ~0
> gets the home for the 0 user (same as ~user) whereas in "a~0", then tilde
> is simply a character. This is basically how ever other Bourne type shell
> seems to work.

In Bash, ~0 means the 0th entry of the directory stack, ie. $PWD.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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