Support for protected members in classes - #688
Merged
Anders Hejlsberg (ahejlsberg) merged 6 commits intoSep 19, 2014
Merged
Conversation
Copy link
Copy Markdown
Member
Sorry, something went wrong.
Comment thread
src/compiler/checker.ts
Copy link
Copy Markdown
Contributor
There was a problem hiding this comment.
I'm glad we are getting rid of this check
Sorry, something went wrong.
Copy link
Copy Markdown
Contributor
|
Result from the design meeting: Everyone is for adding 'protected'. We'd like to get this in. |
Sorry, something went wrong.
Anders Hejlsberg (ahejlsberg)
added a commit
that referenced
this pull request
Sep 19, 2014
Support for protected members in classes
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
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
7 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
This change adds support for protected members in classes as proposed in #1. Also, this change introduces better error messages for assignability and subtype checks involving private and optional properties.
Protected members are modeled after C# and Java. Protected members can be accessed only within the declaring class and subclasses of the declaring class. Furthermore, access to a protected instance member is required to take place through an instance of the enclosing class type or a class type constructed from it (this prevents "sibling" class access).
Protected members can be made public in derived classes. Similar to private members, constructors and signature members cannot be protected.
I will follow up with a more formal specification of the rules but wanted to put up the code for folks to experiment with.
Update: Formal specification provided in #700.