The @ISA variable is a package variable that is used by all classes to indicate the class's parent (or parents). While this variable can be safely read to learn a class's inheritance hierarchy, it must not be modified at runtime [Conway 052005].
Noncompliant Code Example (@ISA)
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Tool | Diagnostic |
|---|---|
Perl::Critic | ClassHierarchies::ProhibitExplicitISA |
Bibliography
| [Conway 052005] | "Inheritance," p. 360 |
|---|---|
| [CPAN] | Maischein, Max, parent |
| [CPAN] | Shank, Elliot, Perl-Critic-1.116 ClassHierarchies::ProhibitExplicitISA |