Perl in a Nutshell, 2nd Edition

Class::Struct

Formerly named Class::Template; exports a single function, struct. struct takes a list of element names and types, and optionally a class name, and creates a Perl class that implements a struct-like data structure. It also creates a constructor method, new, for creating objects of the class (so a class created this way must not itself define a new method).

Each element in the struct data has an accessor method, which is used to assign to the element and to fetch its value. The default accessor can be overridden by declaring a sub of the same name in the package. Each element’s type can be scalar, array, hash, or class.