Optional type using Go 1.18 generics.



Generic Optional (or Go Optional, if you prefer)

goptional is a package that provides an implementation of an Optional[T] monad using Go 1.18 generics.


import (

Why goptional?

  • Prevents you from using uninitialized values.
  • No code generation required.
  • Type-safe API.
  • Supports marshalling and unmarshalling. (TODO)


import (
    optional "go.eth-p.dev/goptional"

func getConfigDirectory() optional.Optional[string] {
    return optional.From(os.LookupEnv("XDG_CONFIG_HOME"))

func main() {
    configDir := getConfigDirectory().

For more detailed examples, feel free to check out the examples directory.


MIT License

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