Adding Union Types and Type Guards to Language Specification #900
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
ahejlsberg
changed the title
ahejlsberg
added a commit
that referenced
this pull request
Oct 15, 2014
Adding Union Types and Type Guards to Language Specification
|
@sheetalkamat is up for this round of spec conformance. |
|
|
||
| ***Union types*** represent values that may have one of several disjoint representations. A value of a union type *A* | *B* is a value that is *either* of type *A* or type *B*. Union types are written using union type literals (section [3.6.6](#3.6.6)). | ||
|
|
||
| A union type encompasses an unordered set of unrelated types (that is, types that aren�t subtypes of each other). The following rules govern union types: |
There was a problem hiding this comment.
Are we okay with these �s in the markdown? Can we convert smartquotes to regular quotes?
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
No description provided.