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Hopefully you saw Liz's comment.

Raku has a zero cost way to add arbitrary post processing that kicks in no matter where or how a block of code exits.

This provides a general mechanism accessible by arbitrary user defined control flow related constructs.

Raku also ships with a dozen or so built in constructs such as PRE and POST blocks that are the foundational elements for DbC, plus UNDO and KEEP blocks for transactional semantics, and so on.

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