Re: Checking if a function is built-in

[Nordlöw]

On 11 Juni, 00:51, "Drew Adams" <drew.ad...@oracle.com> wrote:
> > > > Is there a predicate that can check if a function is built-in?
>
> > > subrp
>
> > I thought this was the way to use it (subrp 'cons)
> > but it returns nil even though cons is a built-in function.
> > Have I missed something?
>
> (subrp (symbol-function 'cons))
>
> `cons' is just a symbol. What you want to test is the function that the symbol
> refers to.
>
> This is not the value of the symbol but the value of its function cell, which 
> is
> a function (a subr, in this case).

Great!

Now I got it!

Many Thanks,
Nordlöw