Jeremy Yallop
ABSTRACT
We describe deriving, a system of extensible generic functions for OCaml implemented as a preprocessor and supporting library. We argue that generating code from type-definitions has significant advantages over a combinator approach, taking serialisation as an example application: our generate-your-boilerplate design results in a system that is easy to use, has comprehensive coverage of types and handles cyclic values without imposing a burden on the user. Users can extend generic functions with specialised implementations at particular types; we show how this can lead to dramatically improved performance in the serialisation task without the user writing a single line of serialisation code.
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Index Terms
- Practical generic programming in OCaml
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