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Subject: Re: How force evaluation of this string's math *before* print?....
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seberino@spawar.navy.mil writes:

> On modeline I have this element....
>
> '(:eval "%c + 1")
>
> How can I tell Emacs to evaluate the addition in quotes above??? Right
> now it literally prints "+ 1" all the time rather than adding it to
> column number (%c).

You can do it like this:

   '(:eval (format "%d" (1+ (current-column))))