Re: Quick math calc on any buffer

[Marc Tfardy]

Chetan schrieb:
> Scott Frazer <frazer.scott@gmail.com> writes:
>
> > On Feb 21, 11:42 am, Rodrigo Lazo <rlazo....@gmail.com> wrote:
> > > Hi all,
> > >
> > > Is there a way to compute a math expression on any buffer? I mean, if I
> > > have a buffer with the following expression
> > >
> > > 2 + 3
> > >
> > > I want to mark the region and compute the result
> > >
> > > 2 + 3 = 5
> > >
> > > It doesn't seems too hard to do, I've looked on calculator.el for a
> > > "computing" function I can call but I didn't find it.
> > (defun my-calc-result (beg end)
> >   (interactive "r")
> >   (insert " = " (calc-eval (buffer-substring beg end))))

> This makes me wonder, is there a rewriter of math expressions,
> something like a macro that can rewrite the arithmetic expression as
> regular lisp function calls?

Yes. See my last post before. The call:

(math-read-exprs "2 + 3")

gives:

((+ 2 3))

This was my attempt in my version of my-calc-result.

reagrds
Marc