I've just seen this case class in the Scala actors
package:
case class ! [a](ch: Channel[a], msg: a)
And in the JavaDoc it describes usage in the following form:
receive {
case Chan1 ! msg1 => ...
case Chan2 ! msg2 => ...
}
Why is this not:
receive {
case !(Chan1, msg1) => ...
case !(Chan2, msg2) => ...
}
Is the bang operator ! a special case in a similar way to methods ending in a colon :
When doing pattern matching, the Scala compiler will interpret
o1 c1 o2
the same asc1(o1, o2)
. That's why::
works inside pattern matches too.