diff options
Diffstat (limited to 'core/shared/src/main/scala/magnolia.scala')
| -rw-r--r-- | core/shared/src/main/scala/magnolia.scala | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/core/shared/src/main/scala/magnolia.scala b/core/shared/src/main/scala/magnolia.scala index 2113dff..62a36a5 100644 --- a/core/shared/src/main/scala/magnolia.scala +++ b/core/shared/src/main/scala/magnolia.scala @@ -65,6 +65,7 @@ object Magnolia { * */ def gen[T: c.WeakTypeTag](c: whitebox.Context): c.Tree = { import c.universe._ + import internal._ val magnoliaPkg = q"_root_.magnolia" val scalaPkg = q"_root_.scala" @@ -246,9 +247,7 @@ object Magnolia { val caseParamsReversed = caseClassParameters.foldLeft[List[CaseParam]](Nil) { (acc, param) => val paramName = param.name.decodedName.toString - val paramType = param.returnType.substituteTypes(genericType.etaExpand.typeParams, - genericType.typeArgs) - + val paramType = param.typeSignatureIn(genericType).resultType val predefinedRef = acc.find(_.paramType == paramType) val caseParamOpt = predefinedRef.map { backRef => @@ -332,10 +331,13 @@ object Magnolia { } else if (isSealedTrait) { val genericSubtypes = classType.get.knownDirectSubclasses.to[List] val subtypes = genericSubtypes.map { sub => - val typeArgs = sub.asType.typeSignature.baseType(genericType.typeSymbol).typeArgs - val mapping = typeArgs.zip(genericType.typeArgs).toMap - val newTypeParams = sub.asType.toType.typeArgs.map(mapping(_)) - appliedType(sub.asType.toType.typeConstructor, newTypeParams) + val subType = sub.asType.toType // FIXME: Broken for path dependent types + val typeParams = sub.asType.typeParams + val typeArgs = thisType(sub).baseType(genericType.typeSymbol).typeArgs + val mapping = (typeArgs.map(_.typeSymbol), genericType.typeArgs).zipped.toMap + val newTypeArgs = typeParams.map(mapping.withDefault(_.asType.toType)) + val applied = appliedType(subType.typeConstructor, newTypeArgs) + existentialAbstraction(typeParams, applied) } if (subtypes.isEmpty) { |