`if #unavailable(iOS 26.0)` transpiles to `if true`
Nobody has claimed this yet.
- Dominant language
- Swift
- Stars
- 3.2k
- Forks
- 106
- Avg merge
- 6d 13h
- Merged PRs (30d)
- 1
Description
iOS 26 provides a new .glassEffect() modifier, but you have to guard it behind if #available(iOS 26.0, *) blocks unless your app minimum version is iOS 26 or higher.
Unfortunately, #available knows nothing about Android; you can't write if #available(iOS 26.0, Android 34, *). As a result, the final * applies to Android; Skip Lite transpiles if #available(iOS 26.0, *) as simply if true.
But, to my surprise and alarm, if #unavailable(iOS 26.0) also transpiles to if true. I claim it should transpile to if false instead.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Search the transpiler for the handling of Swift #available and #unavailable conditions, then trace how the Android fallback represented by the final * is interpreted. Add coverage for if #unavailable(iOS 26.0) and verify that it transpiles to if false rather than if true.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- swift
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100