I&#x27;m pretty sure that the &quot;expression-lambdas&quot; were inspired by Haskell, where you get a lambda simply by writing an operator with one or more missing operands.<p>In Perl 6, detecting that an operand is &quot;missing&quot; isn&#x27;t possible due to the existence of prefix&#x2F;infix&#x2F;postfix operators with the same names, so it expects a &quot;whatever&quot; star in place of the missing operand... :)