in reply to Re^2: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20
in thread use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20

or $r->1->flatten
  • Comment on Re^3: use feature 'postderef'; # Postfix Dereference Syntax is coming in 5.20

In Section Meditations