F. Damiani

Principal typings and true rank 2 intersection typable recursive definitions

Internal report. Superseded by [29], October 2003


We propose new typing rules for assigning rank 2 intersection types to (possibly mutually) recursive definitions. A major achievement of the new rules over previous proposals is that they allow to type also true rank 2 intersection typable recursive definitions (i.e., recursive definitions that have a rank 2 intersection type and no simple type). A notable feature of these rules is that they rely entirely on the principal typing property, so they can be added to any system with principal typings.


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