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Subject: Re: Aliases - I learned something new
To: cygwin AT cygwin DOT com
References: <6bf0908e-f559-b5bb-5ca3-b1cac1b9abde AT gmail DOT com>
From: Eric Blake <eblake AT redhat DOT com>
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Message-ID: <8e128154-2801-0eef-4c2d-08ca21f467b5@redhat.com>
Date: Fri, 25 Aug 2017 10:20:05 -0500
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From: Eric Blake <eblake AT redhat DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <8e128154-2801-0eef-4c2d-08ca21f467b5 AT redhat DOT com>
Subject: Re: Aliases - I learned something new
References: <6bf0908e-f559-b5bb-5ca3-b1cac1b9abde AT gmail DOT com>
In-Reply-To: <6bf0908e-f559-b5bb-5ca3-b1cac1b9abde AT gmail DOT com>


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On 08/25/2017 10:00 AM, cyg Simple wrote:
> If the value of an alias ends in a space the word following the issuance
> of the alias command is also checked for alias expansion.

In fact, this behavior is POSIX-mandated, so that you can do things like:

alias exec=3D'exec '

and get alias expansion on 'foo' when you do 'exec foo'

>  Example:
>=20
> $ alias t1=3D'echo abc'
> $ alias t2=3D'dev'
> $ t1 t2
> abc t2
>=20
> $ alias t1=3D'echo abc '
> $ t1 t2
> abc def

Doesn't quite match what you typed above (dev vs. def), but illustrates
the point.

--=20
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org


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