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Re: Backslash missing in brace expansion

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  Re: Backslash missing in brace expansion Eric Blake <eblake@redhat.com> - 2019-12-06 13:37 -0600

#15703 — Re: Backslash missing in brace expansion

On 12/6/19 11:27 AM, Chet Ramey wrote:
> On 12/6/19 9:23 AM, Robert Elz wrote:
> 
>> I'm not sure I accept the explanation for the \ missing though, quoting is
>> also a parser activity (though some of it also happens in pattern matching).
>> But normally, backslashes (or any other form of quoting) that result from
>> expansions are simply characters.   Quote removal is only supposed to remove
>> quotes that were present on the original command line.
> 
> Quote removal is a word expansion, and removes quotes that were present in
> the original word passed to word expansion. Brace expansion is performed
> before any of the POSIX word expansions, and is logically a separate step.

Then that argues that {Z..a} should produce \\ and \', rather than bare 
characters, so that the subsequent quote removal gets back to the 
intended character.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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