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README.md

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inline-option

An implementation of an Option<A> type in Kotlin using the inline class feature. See https://kotlinlang.org/docs/reference/inline-classes.html

Its just a small proof of concept sparked by the discussion on the arrow-kt issue tracker after they decided to deprecate Option because nullable types are more efficient. Its just a single file, so I decided to omit the usual gradle bloat, Build and test via:

$ kotlinc-native Option.kt OptionTest.kt
$ ./program.kexe

The implementation uses an empty value placeholder to allow for nullable types (i.e. Option<Int?>). I dont think those are ever a good idea to have, but I saw no reason not to support them.