I\'ve recently started playing with Scala (2.8) and noticed the I can write the following code (in the Scala Interpreter):
scala> var x : Unit = 10 x : Un
See section "6.26.1 Value Conversions" in the Scala Language Specification version 2.8:
...
Value Discarding. If e has some value type and the expected type is Unit, e is converted to the expected type by embedding it in the term { e; () }.
e
{ e; () }