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Diffstat (limited to 'core/shared/src/main/scala/magnolia.scala')
-rw-r--r-- | core/shared/src/main/scala/magnolia.scala | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/core/shared/src/main/scala/magnolia.scala b/core/shared/src/main/scala/magnolia.scala index b61d1c0..b5c196a 100644 --- a/core/shared/src/main/scala/magnolia.scala +++ b/core/shared/src/main/scala/magnolia.scala @@ -69,6 +69,10 @@ object Magnolia { import c.universe._ import internal._ + val debug = c.macroApplication.symbol.annotations + .find(_.tree.tpe <:< typeOf[debug]) + .flatMap(_.tree.children.tail.collectFirst { case Literal(Constant(s: String)) => s }) + val magnoliaPkg = q"_root_.magnolia" val scalaPkg = q"_root_.scala" @@ -447,6 +451,10 @@ object Magnolia { if (currentStack.frames.isEmpty) recursionStack = ListMap() val dereferencedResult = result.map { tree => + if (debug.isDefined && genericType.toString.contains(debug.get)) { + c.echo(c.enclosingPosition, s"Magnolia macro expansion for $genericType") + c.echo(NoPosition, s"... = ${showCode(tree)}\n\n") + } if (currentStack.frames.isEmpty) c.untypecheck(removeDeferred.transform(tree)) else tree } |