[r6rs-discuss] string->number

[R. Kent Dybvig]

> > The R6RS states string->number NEVER raises an exception and ALWAYS returns 
> > a number or #f.
> >
> > Does that mean even if one passes a non-string and/or an invalid radix (not 
> > a number or not 2/8/10/16)  it should return #f?
>
> Yes.  This was discussed at some length among the editors, for example,
> here:

I don't believe we ever intended string->number not to raise an exception
if passed something other than a string or if passed, say, 18 arguments,
the wording "never raises an exception" in its description
notwithstanding.  So it seems to me that while (string->number "3/0") must
return #f, (string->number 3) and (string->number) must raises exceptions.

Kent