Re: Real predicate in C

[Marius Vollmer]

Steve Tell <address@hidden> writes:

> On Wed, 19 Jun 2002, Hilaire Fernandes wrote:
> 
> > If the gh_real predicate does not exist, what is the proper way to 
> > implement it?
> 
> Try:
>       SCM_REALP(scmobj)

That's unfortunately not the same as 'real?' in Scheme.  It is only
true for numbers represented as floating point, but is false for
integers, for example.  Yes, it's a mess.

> Unfortunately, it looks like the only way to learn this is to read
> <libguile/numbers.h> (and ignore lots of implementation details).

The manual has scm_real_p right next to 'real?'.