Import org.simantics.scl.tutorial from incubator SVN repo

[simantics/platform.git] / bundles / org.simantics.scl.tutorial / scl / Tutorial / 1.10 Optional values (Maybe).md

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+# Optional values (Maybe)\r
+\r
+The type `Maybe a` can be used in situations where some value can \r
+not be necessarily computed. Its values are either `Nothing` or\r
+`Just v` where the type of `v` is `a`.\r
+\r
+::data[Builtin/Maybe]\r
+::value[Prelude/fromJust, Prelude/fromMaybe, Prelude/execJust, Prelude/filterJust, Prelude/orElse, Prelude/elemMaybe]\r