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Re: syntax extension

• To: mathgroup at smc.vnet.net
• Subject: [mg106486] Re: syntax extension
• From: Chris Osborn <chrisosb at gmail.com>
• Date: Thu, 14 Jan 2010 05:48:47 -0500 (EST)
• References: <hihgmc$ffp$1@smc.vnet.net>

On Jan 12, 3:51 am, Richard Fateman <fate... at cs.berkeley.edu> wrote:
> Is there a neat way to create a new symbol,
> say /!.    so that
>
> expression /. BetterRules[rules]
>
> could be written as
>
> expression /!. rules
>
> I do not find writing something like
>
>   (expression) ~BR~ (rules)
>
> to be quite adequate, especially with the extra parentheses.
> RJF

Hi Richard,

Yes, use the "Notation Package" (you can search for this in the docs).
The actual function you will want to use is probably "InfixNotation".

It's a bit weird though since you have to paste a skeleton of your
call to InfixNotation
from a palette, and then fill in the box asking for your operator.

I haven't done this in a while, but it's all described in the docs.

Chris