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From: Andreas Schwab <schwab@linux-m68k.org>
Newsgroups: gnu.bash.bug
Subject: Re: Inconsistent arithmetic evaluation of parameters
Date: Wed, 02 Sep 2015 09:16:19 +0200
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In-Reply-To: <CANaoh6+s+GQCHozQpN_jO7SLHb=e+HQnCDivi+ADYz1gH6r=ow@mail.gmail.com> (Dennis Williamson's message of "Tue, 1 Sep 2015 18:32:42 -0500")
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Dennis Williamson <dennistwilliamson@gmail.com> writes:

> On Tue, Sep 1, 2015 at 4:24 PM, Andreas Schwab <schwab@linux-m68k.org>
> wrote:
>
>> Dennis Williamson <dennistwilliamson@gmail.com> writes:
>>
>> > $ echo $((foo))  # expansion succeeds, indirection fails
>> > dash: 4: Illegal number: bar
>>
>> The indirection didn't fail, it just didn't produce a number, so the
>> expression is malformed.
>>
>> Andreas.
>>
>> --
>> Andreas Schwab, schwab@linux-m68k.org
>> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
>> "And now for something completely different."
>>
>
> I disagree. The _expansion_ produced "bar"

That's not an expansion.  Only $ introduces an expansion.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."