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Date: Thu, 29 Sep 2016 06:39:16 +0000
From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: zsh-workers@zsh.org
Subject: Re: _dispatch (was Re: PATCH: [for consideration] TMPSUFFIX)
Message-ID: <20160929063916.GA4351@fujitsu.shahaf.local2>
References: <160925155112.ZM23899@torch.brasslantern.com>
 <20160926072546.GA28316@fujitsu.shahaf.local2>
 <160926091922.ZM26758@torch.brasslantern.com>
 <20160927070039.GA20798@fujitsu.shahaf.local2>
 <160927122050.ZM13394@torch.brasslantern.com>
 <20160928102417.GA2729@fujitsu.shahaf.local2>
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Bart Schaefer wrote on Wed, Sep 28, 2016 at 11:49:17 -0700:
> } +  {
> } +    eval "$comp" && ret=0
> } +  } always {
> } +    if (( TRY_BLOCK_ERROR )); then
> } +      ... throw the exception ... 
> } +    fi
> } +  }
> 
> Sadly, that won't do it either -- TRY_BLOCK_ERROR is not set:
> 
> The eval captures everything and turns it into nonzero exit status.
> 
⋮
>     compdef 'compadd *' f
> 
> There might be another way to permit that without eval'ing, but it
> would be convoluted.

It might be easier to just give a flag to eval that means "propagate
errflag of the evaluated expression to the calling scope"?  So the eval
itself would be aborted/unrolled, too.