case - Why cant we use Any or Nothing in scala pattern matching? -

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I have seen that in the following circumstances, the type "type" can be used, but none or nothing, Can not 

  user match {case int = & gt; "ScalaIt" Case Any = & gt; "?" }   
 Why does Scala case class differentiate between these types     
 
 
 is not really anything at all (no such examples are present) to match anybody with only _    Can be used

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