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