fixup! Add mapK to Tracer, SpanBuilder, etc.

add implicitNotFound annotation
typelevel · Aug 31, 2023 · 5a36ec0 · 5a36ec0
1 parent 1caa6b7
commit 5a36ec0
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/core/common/src/main/scala/org/typelevel/otel4s/KindTransformer.scala b/core/common/src/main/scala/org/typelevel/otel4s/KindTransformer.scala
@@ -34,6 +34,7 @@ import cats.~>
 /** A utility for transforming the higher-kinded type `F` to another
   * higher-kinded type `G`.
   */
+@annotation.implicitNotFound("No transformer defined from ${F} to ${G}")
 trait KindTransformer[F[_], G[_]] {
 
   /** A higher-kinded function that lifts the kind `F` into a `G`.