Documentation for infix =, assembled from the following types:
sub infix:<=>(Mu is rw, Mu )
Places the value of the right-hand side into the container on the left-hand side. Its exact semantics are left to the container type on the left-hand side.
(Note that item assignment and list assignment have different precedence levels, and the syntax of the left-hand side decides whether an equal sign
= is parsed as item assignment or list assignment operator).
The distinction between item assignment and list assignment is determined by the parser depending on the syntax of the left-hand side.