On Thu, 31 Mar 2005, Luke Palmer wrote:
Chip Salzenberg writes:I'd like to annotate Perl 6 parameters and other entities using traits, since that's the best way (I know of) to have them appear immediately in the text of the program where they are.
Supposing I had a "doc" trait, could I say: sub f2c (Num $temp doc<Temperature in degrees F>)>> doc<Convert degress F to degrees C> {...}
Or would I be forced to spell it doc('stuff') ?
Well, first you need an `is` somewhere in there. And after that I think you'll need to do it in doc('stuff') form. If we did allow doc<>, then this:
is doc<Convert degrees F to degrees C>
But if you are going to use doc('') in a million places, can you not also make doc a trait_verb and save a little typing? So:
role doc{
sub *trait_verb:doc($container: $string) {
...
}
}But what do I apply the role to? perhaps
class Object does doc
Now
sub f2c (Num $temp doc "Temperature in degrees F") {...}works(I think): trait_verb:doc is a sub, not a method, and so parens are not needed.
It works, but that doesn't read too well. We do need a verb there. "docs", perhaps? Or "gloss", which is both a noun and a verb?
--abhijit
