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Diffstat (limited to 'src/library/scala/reflect/api/Attachment.scala')
| -rw-r--r-- | src/library/scala/reflect/api/Attachment.scala | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/src/library/scala/reflect/api/Attachment.scala b/src/library/scala/reflect/api/Attachment.scala deleted file mode 100644 index 50f55b4aa5..0000000000 --- a/src/library/scala/reflect/api/Attachment.scala +++ /dev/null @@ -1,29 +0,0 @@ -package scala.reflect -package api - -/** Attachment is a generalisation of Position. - * Typically it stores a Position of a tree, but this can be extended to encompass arbitrary payloads. - * - * Attachments have to carry positions, because we don't want to introduce even a single additional field in Tree - * imposing an unnecessary memory tax because of something that will not be used in most cases. - */ -trait Attachment { - /** Gets the underlying position */ - def pos: Position - - /** Creates a copy of this attachment with its position updated */ - def withPos(newPos: Position): Attachment - - /** Gets the underlying payload */ - def payload: Any - - /** Creates a copy of this attachment with its payload updated */ - def withPayload(newPayload: Any): Attachment -} - -// [Eugene] with the introduction of `attach` and `attachment[T]` users don't need to create custom attachments anymore -// however, we cannot move attachments to scala.reflect.internal, because they are used in Trees, which are implemented completely in scala.reflect.api -private[scala] case class NontrivialAttachment(pos: api.Position, payload: collection.mutable.ListBuffer[Any]) extends Attachment { - def withPos(newPos: api.Position) = copy(pos = newPos, payload = payload) - def withPayload(newPayload: Any) = copy(pos = pos, payload = newPayload.asInstanceOf[collection.mutable.ListBuffer[Any]]) -}
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