Ah, OK, you didn't mean override WHAT itself, but get an ersatz what in some other way. Got it. Thanks.
El mar., 12 jun. 2018 a las 21:32, Brad Gilbert (<b2gi...@gmail.com>) escribió: > On Tue, Jun 12, 2018 at 2:16 PM, JJ Merelo <jjmer...@gmail.com> wrote: > > This is what the documentation says: https://docs.perl6.org/syntax/WHAT > > You can override it, but we'll pay no attention anyway, basically. So you > > can't achieve it otherwise, I guess. > > It is easy to achieve. > > sub user-made-what ( ::Type ) { Type } > > say 42.&user-made-what; # says (Int) > > > > > El mar., 12 jun. 2018 a las 21:14, JJ Merelo (<jjmer...@gmail.com>) > > escribió: > >> > >> > >> > >> 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 > >> > > > > > > -- > > JJ > -- JJ
