Document aliases and illustrate with how to create :0th :1st :2nd :3rd :4th named thingies

[AlexDaniel]

Is there a shorthand way for accepting numeric options and merging them so you can do :0th :1st :2nd :3rd fun?

sub ordinated( :st(:nd(:rd(:th($num))))=-1 ) {
    say "I got $num."
}
ordinated(:0th); # OUTPUT: «I got 0.␤»
ordinated(:1st); # OUTPUT: «I got 1.␤»
ordinated(:2nd); # OUTPUT: «I got 2.␤»
ordinated(:3rd); # OUTPUT: «I got 3.␤»
ordinated(:4th); # OUTPUT: «I got 4.␤»
ordinated();     # OUTPUT: «I got -1.␤»

[treyharris]

I'll take this and increase its scope a bit since there appears to be no documentation of aliases at all, and this is a good example to illustrate.

[AlexDaniel]

Also:

• https://docs.perl6.org/language/functions#sub_MAIN (found in the source here) should probably link to that newly written section
• And it should be searchable by “alias”.

[JJ]

Ping?

[JJ]

• Argument aliases are documented now
• That above is just a hack, which besides breaks if you simply use 1th. We can additionally document nested aliases.