This artifact is a companion to the paper "Scala with Explicit Nulls", where we present a modification to the Scala type system that makes nullability explicit in the types. Specifically, we make reference types non-nullable by default, while still allowing for nullable types via union types. The artifact contains an implementation of this new type system design as a fork of the Dotty (Scala 3) compiler. Additionally, the artifact contains the source code of multiple Scala libraries that we used to evaluate our design.
@Article{nieto_et_al:DARTS.6.2.14, author = {Nieto, Abel and Zhao, Yaoyu and Lhot\'{a}k, Ond\v{r}ej and Chang, Angela and Pu, Justin}, title = {{Scala with Explicit Nulls (Artifact)}}, pages = {14:1--14:2}, journal = {Dagstuhl Artifacts Series}, ISSN = {2509-8195}, year = {2020}, volume = {6}, number = {2}, editor = {Nieto, Abel and Zhao, Yaoyu and Lhot\'{a}k, Ond\v{r}ej and Chang, Angela and Pu, Justin}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/DARTS.6.2.14}, URN = {urn:nbn:de:0030-drops-132117}, doi = {10.4230/DARTS.6.2.14}, annote = {Keywords: Scala, Java, nullability, language interoperability, type systems} }
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