swiftlang / swiftlang/swift-java
Code in conditional compilation branches is not exported
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feature:jextract
- Dominant language
- Swift
- Stars
- 1.2k
- Forks
- 123
- Avg merge
- 1d 7h
- Merged PRs (30d)
- 16
Description
Reproduction
This is likely a known issue, but I didn't find mentions in the issues yet. Basically, from the following code:
#if FOO
public func first() {}
#else
public func second() {}
#endif
public func third() {}
only the third function is exported by jextract as of 5764bc2a1b706056121109dc0ab14fd3d771cbc5
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
Start by reproducing the conditional-compilation example with jextract at the referenced commit, checking why only third is exported. Trace the export path for Swift declarations in #if and #else branches, then verify that the applicable branch functions are exported while unrelated branches remain excluded.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, swift
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100