Perl 5 version 8.7 documentation
- ref EXPR
Returns a non-empty string if EXPR is a reference, the empty string otherwise. If EXPR is not specified,
$_will be used. The value returned depends on the type of thing the reference is a reference to. Builtin types include:
If the referenced object has been blessed into a package, then that package name is returned instead. You can think of
See also perlref.