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type fixes and bindings + notes on subtyping

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Ellen Arvidsson 2025-05-19 12:16:31 +02:00
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# Contributions
* We introduce a type system able to express predicated types, a unified way to
express existance of method- and traits depending on some predicate on the
subtyping relation.
* We define our subtyping relation as a natural extension to type systems based
on semantic subtyping.
* We express our subtyping using a novel approach based on the sequent calculus.
* We show the correctness of our subtyping relation and type system.
* We explain how this type system may be used to succinctly describe programs
involving for example capabilities and constructions such as type classes.
* We have implemented the type system and give examples of how its use
simplifies expressing many properties in object oriented languages, including
things like...