*print-right-margin* ineffective for write

[Charles Turner]

On 01/12/11 20:16, Taylor Venable wrote:
> *print-right-margin* affects file ports:

Whoops, sorry about that slice of misinformation! I got confused with 
the various pretty printing modes in PrettyWriter. Somebody (I assume 
Per) must have considered the issue, since there is an unused 
constructor in PrettyWriter that sets the pretty printing mode to zero 
if the given length length is <= 1, this idea just hasn't trickled into 
some sort of dynamic handling for *print-right-margin*.

> I agree that negative values are good to identify when
> *print-right-margin* should be disabled; perhaps additionally:
>
> #f = disable (same as e.g. -1 or -42)
> #t = enable w/ hard-coded default (same as #!null)

I think that's sensible.

Thanks,
Charlie.