Abstract
We modify Clean’s uniqueness type system in two ways. First, while Clean functions that are partially applied to a unique argument are necessarily unique (they cannot lose their uniqueness), we just require that they must be unique when applied. This ultimately makes subtyping redundant. Second, we extend the type system to allow for higher-rank types. To be able to do this, we explicitly associate type constraints (attribute inequalities) with type schemes. Consequently, types in our system are much more precise about constraint propagation.
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de Vries, E., Plasmeijer, R., Abrahamson, D.M. (2007). Uniqueness Typing Redefined. In: Horváth, Z., Zsók, V., Butterfield, A. (eds) Implementation and Application of Functional Languages. IFL 2006. Lecture Notes in Computer Science, vol 4449. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74130-5_11
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DOI: https://doi.org/10.1007/978-3-540-74130-5_11
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-74129-9
Online ISBN: 978-3-540-74130-5
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