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Implicit annotations are a very powerful feature in Scala. They allow for fluid DSLs, an amazing collection library, or enriching existing types. With great power comes great responsability, and a desire to control. Meet Implicit Highlighting!
Notice that the string is underlined, and a marker is added to the left gutter. This signals that the method format was added through an implicit conversion. If you move your mouse on the gutter, you will see the actual conversion (augmentString).
There is also a QuickFix available (CMD-1) that makes the call the implicit conversion explicit!
By default, only implicit conversions are highlighted. This makes sense, since most of the times implicit values that are passed around are not too costly, nor interesting. However, if you’d like to show those as well, you can enable them from the Implicits preferences page.
This feature was contributed by Jin Mingjian and improved by David Bernard and Mirko Stocker. Thank you!
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