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| author | Jon Pretty <jon.pretty@propensive.com> | 2017-11-10 14:57:55 +0000 |
|---|---|---|
| committer | Jon Pretty <jon.pretty@propensive.com> | 2017-11-10 14:57:55 +0000 |
| commit | a19b4d22b4caffbed551182b20657588b470230b (patch) | |
| tree | 7a35fcdc604794650196479f973828771725ee71 /core | |
| parent | 657d2fb2c16b75c790bf3c3a63d1f830a42893db (diff) | |
| download | magnolia-a19b4d22b4caffbed551182b20657588b470230b.tar.gz magnolia-a19b4d22b4caffbed551182b20657588b470230b.tar.bz2 magnolia-a19b4d22b4caffbed551182b20657588b470230b.zip | |
Attempt to allow the `Typeclass` definition to be defined in supertrait
Diffstat (limited to 'core')
| -rw-r--r-- | core/src/main/scala/magnolia.scala | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/core/src/main/scala/magnolia.scala b/core/src/main/scala/magnolia.scala index 293d0f1..f7e9b0e 100644 --- a/core/src/main/scala/magnolia.scala +++ b/core/src/main/scala/magnolia.scala @@ -71,8 +71,16 @@ object Magnolia { val magnoliaObj = q"$magnoliaPkg.Magnolia" val arrayCls = tq"_root_.scala.Array" - val typeConstructor: c.Type = - c.prefix.tree.tpe.member(TypeName("Typeclass")).asType.toType.typeConstructor + val typeDefinitions = + c.prefix.tree.tpe.baseClasses.flatMap(_.asType.toType.decls).filter(_.isType) + + val typeConstructorOpt = + typeDefinitions.find(_.name.toString == "Typeclass").map(_.asType.toType.typeConstructor) + + val typeConstructor = typeConstructorOpt.getOrElse { + c.abort(c.enclosingPosition, "magnolia: the derivation object does not define the Typeclass "+ + "type constructor") + } def findType(key: Type): Option[TermName] = recursionStack(c.enclosingPosition).frames.find(_.genericType == key).map(_.termName(c)) |