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Re: Bug in parameter expansion with :- ?

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From: Peter Stephenson <p.stephenson@xxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Re: Bug in parameter expansion with :- ?
Date: Tue, 10 Jan 2017 15:43:18 +0000
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On Tue, 10 Jan 2017 16:35:00 +0100
Ronald Fischer <ynnor@xxxxx> wrote:

> This expands correctly to a '+':
> 
>       ${unset_variable:-+}
> 
> This however doesn't expand to a '-', but to the empty string:
> 
>     ${unset_variable:--}

You may be getting into confusions with options to builtins rather than
the expansion.

% print -r -- ${unset_variable:--} 
-

pws

Follow-Ups:
- Re: Bug in parameter expansion with :- ?
  - From: Ronald Fischer

References:
- Bug in parameter expansion with :- ?
  - From: Ronald Fischer

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