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Re: parsing empty alternatives: case foo|) :;;

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From: Peter Stephenson <p.stephenson@xxxxxxxxxxx>
To: Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>
Subject: Re: parsing empty alternatives: case foo|) :;;
Date: Mon, 07 Aug 2017 15:26:49 +0100
Cc: zsh-workers@xxxxxxx
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References: <CGME20170807135641epcas3p4bc0a64f832ae7fcd76051ac198722045@epcas3p4.samsung.com> <20170807135559.odtceysgqn5qeqql@tarpaulin.shahaf.local2>

On Mon, 7 Aug 2017 13:55:59 +0000
Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx> wrote:
> % case '' in (foo|) echo yes;; esac
> yes
> % case '' in foo|) echo yes;; esac
> zsh: parse error near `)'
> 
> Why does the second case fail to parse?  We (IRC) don't see any ambiguity
> in it.

I haven't checked, but I think it looks like a pipe --- at that point we
haven't gone further down the case-specific code so that it parses the
line specially.

pws

Follow-Ups:
- Re: parsing empty alternatives: case foo|) :;;
  - From: Bart Schaefer

References:
- parsing empty alternatives: case foo|) :;;
  - From: Daniel Shahaf

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