Re: [Chicken-users] Chicken C interface

[Peter Bex]

On Wed, Jun 05, 2013 at 08:19:15PM +0200, Thomas Chust wrote:
> On 2013-06-05 20:11, Peter Bex wrote:
> > On Wed, Jun 05, 2013 at 07:57:49PM +0200, Thomas Chust wrote:
> >> but it's trivial to detect cyclic lists during the traversal using
> >> either a set of seen elements or just two iteration pointers travelling
> >> at different speeds.
> > 
> > In C that's rather painful.  Note that the OP was asking specifically
> > for a C_listp macro.
> > [...]
> 
> Hello,
> 
> well, I think that two iteration pointers are trivial even in C, but
> that may be a matter of taste :-)

Of course you're right.  I was thinking of the set of seen elements.
I need sleep.

Cheers,
Peter
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