Let's say we've got a Foo class in a library we use and want (in a code file of ours) Foo instances to be implicitly cast to String instances whenever a Foo instance is met in a place a String instance is required. How to achieve this in Scala?
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Just do this:
implicit def stringFromFoo(foo: Foo): String = foo.toString
Daniel C. Sobral
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And don't forget you'll need to import this method or place it somewhere compiler will find it (in superclass or a trait of your class, package object, etc.). – Alexey Romanov Oct 16 '11 at 05:57