Find used implicits in the Scala REPL

Question

I often find a neat solution to a problem by using Scalaz pimps. Usually the solution works like

import scalaz._
import Scalaz._
foobar frobnicate quux
// magic

Now, I would like to be able to see what implicits I have actually used to add to my Foobar a frobnicate method. In this way I can make a more refined import and learn something new about the tool I have implicitly used.

Is there some way to find out what implicit conversions the compiler actually used to compile some expression?

Answer 1

You can also see the fully expanded version of your code using the -Xprint:typer option to scalac. In a sbt project, one can add the line

scalacOptions += "-Xprint:typer"

to build.sbt and see the result with the compile commmand.

(taken from the answer linked by retronym)