Files
sbt/internal
Dale Wijnand 0713e31cea Allow opting out of the fallback OptJsonWriter
Simply

    import OptJsonWriter.OptOut._

And you'll get the implicit lift, but not the implicit fallback.

You get an ambiguous compile error like this:

    [error] /d/sbt-util/internal/util-collection/src/main/scala/sbt/util/OptJsonWriter.scala:28: ambiguous implicit values:
    [error]  both method conflictingFallback1 in trait OptOut0 of type [A]=> sbt.util.NoJsonWriter[A]
    [error]  and method conflictingFallback2 in trait OptOut0 of type [A]=> sbt.util.NoJsonWriter[A]
    [error]  match expected type sbt.util.OptJsonWriter[Foo]
    [error]     val x = implicitly[OptJsonWriter[Foo]]
    [error]                       ^
2017-07-07 09:50:35 +01:00
..
2017-07-07 09:50:08 +01:00