swiftlang / swiftlang/swift-java

Make not imported methods java->swift unavailable

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feature:wrap-java
Dominant language
Swift
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Merged PRs (30d)
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Description

Missing methods from javakit imports can be sometimes confusing when someone tries to "just use" the library emitted.

We should instead still emit methods, but make them unavailable:

warning: Unable to translate 'org.apache.commons.csv.CSVParser' method 'getRecords': Java class 'org.apache.commons.csv.CSVRecord' has not been translated into Swift

->

@available(*, unavailable, message: "Java class 'org.apache.commons.csv.CSVRecord' has not been translated into Swift")

etc

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing how JavaKit imports are handled and where methods from untranslated Java classes are emitted. Verify the existing warning path and determine how the generated Swift declaration should express the unavailable message. Done means methods such as CSVParser.getRecords remain emitted but clearly fail as unavailable when their Java types were not translated.

Written by the indexing model from the issue text.

Assessment

Tech stack
java, swift
Domain
compilers
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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