our EXPR
    our TYPE EXPR
    our EXPR : ATTRS
    our TYPE EXPR : ATTRS
            "our" associates a simple name with a package variable in the
            current package for use within the current scope. When "use
            strict 'vars'" is in effect, "our" lets you use declared global
            variables without qualifying them with package names, within the
            lexical scope of the "our" declaration. In this way "our"
            differs from "use vars", which is package scoped.