Optional arguments #223
Open
Optional arguments #223
Conversation
This file contains 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
noordahx
commented
Sep 13, 2024
| @@ -9,8 +9,8 @@ fun (??) oops(a, b) = a + b | |||
| //│ = 3 | |||
|
|
|||
|
|
|||
| fun f1(a?: Int, b?: Int) = a + b | |||
| //│ fun f1: (a: (Int)?, b: (Int)?) -> Int | |||
| fun f1(aOpt?: Int, bOpt?: Int) = aOpt + bOpt | |||
There was a problem hiding this comment.
@LPTK how can I handle this case?
should it return an error requiring a and b defined before a + b?
There was a problem hiding this comment.
The idea of this approach is that if your parameter x of type T is optional (annotated with ?), then while the corresponding parameter type remains T when viewed from the outside (but of course, the parameter is still marked as optional), as in (? T) -> Int, the visible type of x inside the body is T | undefined. That's all we need for the feature to work correctly.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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Outdated suggestions cannot be applied.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.
draft pr