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#odersky-programming-in-scala-1ed #scala
Scala will transform the expression -2.0 into the method invocation " (2.0).unary_- ".
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Basic Types and Operations
are -2.0, !found, and ~0xFF. As with the infix operators, these prefix operators are a shorthand way of invoking methods. In this case, however, the name of the method has "unary_" prepended to the operator character. For instance, <span>Scala will transform the expression -2.0 into the method invocation "(2.0).unary_-". You can demonstrate this to yourself by typing the method call both via operator notation and explicitly: scala> -2.0 // Scala invokes (2.0).unary_- res2: Doub


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