Abstract
The Marker Trait pattern uses traits that declare no methods, functions, types or properties to indicate additional semantics of a type (class, object or further traits). An alternative could be to use annotations, however annotations are not part of the type system of Scala, and thus can only provide additional semantic meaning where as a Marker trait also adds the ability to be treated as part of Scala the type system.
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© 2013 Springer International Publishing Switzerland
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Hunt, J. (2013). Marker Trait. In: Scala Design Patterns. Springer, Cham. https://doi.org/10.1007/978-3-319-02192-8_6
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DOI: https://doi.org/10.1007/978-3-319-02192-8_6
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-02192-8
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