[Experiment] Qualified Types #21586
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[Experiment] Qualified Types #21586
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Co-Authored-By: Quentin Bernet <28290641+Sporarum@users.noreply.github.com>
Co-Authored-By: Valentin Schneeberger <23651312+Valentin889@users.noreply.github.com> Co-Authored-By: Quentin Bernet <28290641+Sporarum@users.noreply.github.com>
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This PR is a prototype implementation of refinement types for Scala, enabling types to be refined with logical predicates that are statically checked by the compiler. A qualified type refines a base type
Twith a predicatep(x), written as{x: T with p(x)}. It denotes the subset of valuesx: Tfor whichp(x)holds. For example{x: Int with x > 0}is the type of positive integers and{x: List[Int] with x.nonEmpty}the type of non-empty integer lists.Read more, from the Scala Workshop 2025: