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Re: $PreRead

  • To: mathgroup at
  • Subject: [mg20657] Re: [mg20630] $PreRead
  • From: David Withoff <withoff at>
  • Date: Sun, 7 Nov 1999 02:09:58 -0500
  • Sender: owner-wri-mathgroup at

> Section 2.13.1 of the Mathematica Book, v3 gives:
> In[1]:=$PreRead = StringReplace[#, {"<<" -> "{", ">>" -> "}"}]&
> And now, supposedly
> In[2]:=<<4,5,6>>
> Out[2]:={4,5,6}
> But when I try this, I get an "Incomplete expression" error.
> I even get that error when I try to remove the value with
> $PreRead=.
> This would be quite a useful function if I could get it to work.
> Does anyone have suggestions? I'm using on win98.
> N Monomachoff
> nmonomachoff at

That example applies to InputForm input.  If you are using Mathematica
through the notebook front end, the default input format type is
StandardForm.  You can change the the default input format type
to InputForm by selecting InputForm in the Default Input Format Type
submenu of the Cell menu, or you could introduce your own typesetting
rules to get the analogous behavior in StandardForm.

Dave Withoff
Wolfram Research

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