Re: Getting the variable number of a lexical local variable

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

On Tue, Feb 16, 2010 at 11:10:43PM -0500, Charles Greathouse wrote:
> I'm trying to get the variable number of a lexical variable, but I
> can't seem to figure out how to do that.
>
> If I have a function with a V in the prototype, like a custom for
> loop, how do I know which variable was used?

This is always -1.

See
??"Functions to deal with lexical local variables"@5

> In my case, I would like to be able to distinguish between calls to
> sumformal(x=1, N, x^2 * y)
> and
> sumformal(y=1, N, x^2 * y)

What is the difference with sum() ?

Cheers,
Bill