StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
20173211
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-11-24T09:53:15.843
FavoriteCount
0
LastActivityDate
2013-11-24T09:58:23.333
LastEditDate
2013-11-24T09:58:23.333
LastEditorUserId
158652
OwnerUserId
158652
ParentId
20159237
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
<p>Here is a partial answer that I came up with and got working. Basically, you create an empty trait, SubPositionSpacePosition, that gets applied to all level-2 positions. You can then define a companion object for SubPositionSpacePosition that defines the implicit conversion. You can only define the conversion for leve-2 positions to level-1 positions. Anything beyond that, and you run into the roadblocks that I outlined in the question.</p> <pre><code>import scala.language.implicitConversions class PositionSpace { positionSpace => trait Position extends Ordered[Position] { } trait SubPositionSpace extends PositionSpace with Position { subPositionSpace => trait SubPositionSpacePosition extends subPositionSpace.Position { } def append() = new Position with SubPositionSpacePosition { } def appendSubSpace() = new SubPositionSpace with SubPositionSpacePosition { } class SubPosition(private val subPositionIndex : subPositionSpace.Position) extends positionSpace.Position { } object SubPositionSpacePosition { implicit def promoteSubPositionSpacePosition(subPositionSpacePosition : SubPositionSpacePosition) : positionSpace.Position = new SubPosition(subPositionSpacePosition) } } def append() = new Position { } def appendSubSpace() = new SubPositionSpace { } } object TestCases { val positionSpace = new PositionSpace() val subSpace = positionSpace.appendSubSpace() val subSpacePosition = subSpace.append() val subSpacePositionAsPosition : positionSpace.Position = subSpacePosition val subSubSpace = subSpace.appendSubSpace() val subSubSpacePosition = subSubSpace.append() //this still fails to build!!! val subSubSpacePositionAsPosition : positionSpace.Position = subSubSpacePosition } </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. PODefining An Implicit Conversion For A Recursive And Nested Type Structure
  singulars
  PostTypePostTypeId
  PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USNimrand
UserOwnerUserId
1. USNimrand
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.