Is there any usage of implicit functions with several parameters in Scala?

Question

Implicit functions with several parameters are allowed, that is:

implicit def it(path: String, category: String):Iterator[String] = ...

But can the Scala compiler do something useful with it? If not, why doesn't it complain?

Daniel C. Sobral · Accepted Answer · 2011-08-29 20:25:29Z

18

Yes, the compiler can do something with it if you ask for such an implicit.

def f(implicit ev: (String, String) => Iterator[String]) = ...

answered Aug 29, 2011 at 20:25

Daniel C. Sobral

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2 Comments

yura Over a year ago

Wonderful scala, if not as implicit converter, then as implicit argument )

ghik Over a year ago

@yura If you look into Scala Language Specification, you'll see that these two things are actually unified. Looking up implicit conversion from A to B is equivalent to looking up implicit parameter of type A => B. So implicit conversions and implicit parameters are roughly the same thing under the hood.

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