El mar., 12 jun. 2018 a las 21:11, Brandon Allbery (<allber...@gmail.com>) escribió:
> I should clarify this, but I'm not recalling full details at the moment > which is why I didn't originally. > > Perl uses a metaobject protocol (MOP, which you'll see in various places > in the docs). The "macro" to access the metaobject is the .HOW > pseudo-method. If you do this for a normal class or object of that class, > you get Perl6::Metamodel::ClassHOW back. This is what the .^method syntax > is accessing; it's short for (thing).HOW.method((thing), ...). The > metaclass doesn't magically know its children, so the object has to be used > once to get at its metaclass and a second time to tell the metaclass what > it is to introspect. > > I'm not seeing documentation for what .WHAT actually does; it (correctly) > notes that it's implemented specially within the compiler (hence "macro") > but not how you achieve it otherwise. Then again, .HOW has the same issue; > there's a bit of a bootstrapping issue with getting at the metamodel, you > need to have it first. Which is why it's wired into the compiler and gets > those uppercase pseudo-method names. > All the metamodel is not exactly part of the language; it's part of the compiler. So it's in the gray NOT-SPECCED zone regarding documentation of "Perl 6" the language, as oposed to "Perl 6, the implementation by Rakudo". But it's a gray zone and sometimes you fall short of documenting things like WHAT. I'll see what we can in that area. JJ
