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Diffstat (limited to 'src')
| -rw-r--r-- | src/compiler/scala/reflect/reify/Taggers.scala | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/compiler/scala/reflect/reify/Taggers.scala b/src/compiler/scala/reflect/reify/Taggers.scala index 576576bc6f..4e30d0acf8 100644 --- a/src/compiler/scala/reflect/reify/Taggers.scala +++ b/src/compiler/scala/reflect/reify/Taggers.scala @@ -38,7 +38,13 @@ abstract class Taggers { def materializeTypeTag(universe: Tree, mirror: Tree, tpe: Type, concrete: Boolean): Tree = { val tagType = if (concrete) TypeTagClass else AbsTypeTagClass - val unaffiliatedTagTpe = TypeRef(BaseUniverseClass.asTypeConstructor, tagType, List(tpe)) + // what we need here is to compose a type BaseUniverse # TypeTag[$tpe] + // to look for an implicit that conforms to this type + // that's why neither appliedType(tagType, List(tpe)) aka TypeRef(TypeTagsClass.thisType, tagType, List(tpe)) + // nor TypeRef(BaseUniverseClass.thisType, tagType, List(tpe)) won't fit here + // scala> :type -v def foo: scala.reflect.base.Universe#TypeTag[Int] = ??? + // NullaryMethodType(TypeRef(pre = TypeRef(TypeSymbol(Universe)), TypeSymbol(TypeTag), args = List($tpe)))) + val unaffiliatedTagTpe = TypeRef(BaseUniverseClass.typeConstructor, tagType, List(tpe)) val unaffiliatedTag = c.inferImplicitValue(unaffiliatedTagTpe, silent = true, withMacrosDisabled = true) unaffiliatedTag match { case success if !success.isEmpty => |