Re: [BUG] quoted substring parameter expansion ignores single-quotes in the arg

[Martijn Dekker <martijn@xxxxxxxx>]

Op 21-10-17 om 14:13 schreef Jilles Tjoelker:
[...]
> I think it is sufficiently clear that various special
> characters are active in ${param#word}, whether the outer substitution
> is within double-quotes or not.

Yes -- this came up on austin-group-l some time ago as well.
https://www.mail-archive.com/austin-group-l@xxxxxxxxxxxxx/msg00197.html

> Although zsh is a good interactive shell, it does not follow
> POSIX as closely; not even in sh or ksh emulation mode.

I think that may have changed. Try the latest version. Over the last
year or two, many POSIX compliance bugs have been fixed. I believe the
latest version is about as compliant as bash or dash.

Zsh does still accept the wrong "${param#'}" expansion like dash does,
but handling non-compliant input is more like an extension than actual
non-compliance. Zsh acts correctly on "${param#\'}", like dash. It also
acts correctly on "${param#'foo'}", *unlike* dash.

- M.
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