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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: Inconsistent arithmetic evaluation of parameters |
| Date | Wed, 2 Sep 2015 11:24:42 -0400 |
| Lines | 19 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.402.1441207526.19560.bug-bash@gnu.org> (permalink) |
| References | <61895190-83A6-4D62-B90E-65023D5E966B@gmail.com> <20150901175030.GP4309@eeg.ccf.org> <CANaoh6LNi_YyOOB56ZMR3P8thRSMfoTcDCGyW8S921nVoP1H7Q@mail.gmail.com> <20150901202308.GR4309@eeg.ccf.org> <CANaoh6+kxLMGGAO8GR37xriYh8j3AZgUDNs4uL+Qjvz5bxT_Ww@mail.gmail.com> <87r3mhu91x.fsf@igel.home> <CANaoh6+s+GQCHozQpN_jO7SLHb=e+HQnCDivi+ADYz1gH6r=ow@mail.gmail.com> <mvmk2s9thoc.fsf@hawking.suse.de> <CANaoh6K2WBBv7EDbgeCBGe5tbBC_YfDW7x3ORgBVTdt2Ynfn7Q@mail.gmail.com> <20150902151948.GT4309@eeg.ccf.org> |
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| Cc | "bug-bash@gnu.org" <bug-bash@gnu.org>, chet.ramey@case.edu |
| To | Greg Wooledge <wooledg@eeg.ccf.org>, Dennis Williamson <dennistwilliamson@gmail.com> |
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On 9/2/15 11:19 AM, Greg Wooledge wrote: > On Wed, Sep 02, 2015 at 10:16:14AM -0500, Dennis Williamson wrote: >> The $ is implied. > > That is completely absurd. (And wrong.) Not exactly. When the arithmetic evaluator encounters a token that is of the form of a shell identifier (`bar'), in a context where an operand is needed, it treats it as a shell variable and looks up the variable's value. In that sense, it's an expansion. The difference between bash and dash is what each shell does with that value. -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
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Re: Inconsistent arithmetic evaluation of parameters Chet Ramey <chet.ramey@case.edu> - 2015-09-02 11:24 -0400
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