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Decidable subclassing-bounded quantification

Juan Chen


Bounded quantification allows quantified types to specify subtyping bounds for the type variables they introduce. It has undecidable subtyping and type checking. This paper shows that subclassing-bounded quantification---type variables have subclassing bounds---has decidable type checking. The main difficulty is that, type variables can have either upper bounds or lower bounds, which complicates the minimal type property.


Publication typeInproceedings
Published inACM Workshop on Types in Language Design and Implementation (TLDI 05)
PublisherAssociation for Computing Machinery, Inc.
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