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Re: bash command alias has a problem in using brace.

From: Chet Ramey
Subject: Re: bash command alias has a problem in using brace.
Date: Tue, 31 Aug 2021 11:20:44 -0400
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On 8/27/21 9:47 PM, Dale R. Worley wrote:
Hyunho Cho <mug896@gmail.com> writes:

but if i use alias then '>' prompt does not appear and default bash
prompt appears

bash$ alias myalias='{ cat <<\@ > foo ;} 2> /dev/null'
bash$ myalias
bash$ 111
bash$ 222              # bash$ prompt
bash$ @

I don't know the details, but it must have something to do with what
event triggers the reading of the here-document.  That event isn't the
execution of the command containing it, I don't think, but more like
when the here-document-redirection is parsed.

This is substantially correct. When the parser goes and collects the body
of the here-document, it's still parsing the contents of the alias.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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