Re: Parrot strings: are strings like "\x{FF10}" false?

On Sat, Jan 26, 2002 at 10:42:17AM +0000, David Chan wrote:
> Which Parrot strings are supposed to be false in a boolean context?

Thinking more deeply about this, I guess it depends entirely on the 
language, although we can provide string_bool as a sensible default.

> For instance, is "\x{FF10}" (FULLWIDTH DIGIT ZERO) false?

Yes.

> > unicode_is_digit(UINTVAL c) {
> >     return (BOOLVAL)(isdigit(c) ? 1 : 0); /* FIXME - Other code points are also digits */
> > }
> > 
> > static INTVAL
> > unicode_get_digit(UINTVAL c) {
> >     return c - '0'; /* FIXME - many more digits than this... */
> > }

Yep, once these functions are fixed to really grok Unicode numeric value and
digit value properties, string_bool will just work.

-- 
Thermodynamics in a nutshell:
1st Law:  You can't win.  (Energy is conserved)
2nd Law:  You can't break even.  (Entropy)
0th Law:  You can't even quit the game.  (Closed systems) -- Taki Kogoma

• Parrot strings: are strings like "\x{FF10}" false? by David Chan
• Re: Parrot strings: are strings like "\x{FF10}" false? by Simon Cozens
• Re: Parrot strings: are strings like "\x{FF10}" false? by Alex Gough