In Pair§

See primary documentation in context for method key

multi method key(Pair:D:)

Returns the key part of the Pair.

my $p = (Raku => "d");
say $p.key# OUTPUT: «Raku␤»

In role Enumeration§

See primary documentation in context for method key

An Enumeration property.

enum Norse-gods <Þor Oðin Freija>;
say Freija.key# OUTPUT: «Freija␤»

In X::Syntax::NegatedPair§

See primary documentation in context for method key

Returns the key of the pair that caused the error.