chiragramani/SwiftMacroRepro

SwiftMacroRepro

Context: https://forums.swift.org/t/how-to-import-macros-using-methods-other-than-swiftpm/66645/19

Repro steps

Xcode 15

Part A (Macro Plugin)

1. Open swift-macro-examples-main/MacroExamples.xcodeproj.
2. Build the MacroExamples scheme.
3. Once the build is completed, go to the build details page and find the compiler invocation for main.swift.
4. The compiler invocation will have the plugin executable path after this flag -load-executable-path

It will look something like this:

-load-plugin-executable
/Users/chirag.ramani/Library/Developer/Xcode/DerivedData/swift-macro-examples-main-csywlwgecxhauhdfxsutsqgbukkc/Build/Products/Debug/MacroExamplesPlugin\#MacroExamplesPlugin

5. Find the path to MacroExamplesLib.swiftmodule from the same details page.

It will look something like this:

/Users/chirag.ramani/Library/Developer/Xcode/DerivedData/swift-macro-examples-main-csywlwgecxhauhdfxsutsqgbukkc/Build/Intermediates.noindex/MacroExamples.build/Debug/MacroExamplesLib.build/Objects-normal/arm64/MacroExamplesLib.swiftmodule

Part B (Macro Client)

1. Open MacroClient/MacroClient.xcodeproj.
2. Update the OTHER SWIFT FLAGS as follows:

-I<absolute path to MacroExamplesLib.swiftmodule>

-load-plugin-executable
/Users/chirag.ramani/Library/Developer/Xcode/DerivedData/swift-macro-examples-main-csywlwgecxhauhdfxsutsqgbukkc/Build/Products/Debug/MacroExamplesPlugin\#MacroExamplesPlugin

3. Build the project. Note: I have seen indexing not picking up the latest modification to OTHER SWIFT FLAGS. So kill XCBuildService, Xcode, and re-open MacroClient project.

Observations:

1. Everything builds fine, lldb prints macro results as expected.
2. Indexing is successful (as per indexing logs).
3. Macro - open definition works all fine as well. It opens the public interface of MacroExamplesLib.

Issues:

1. Syntax highlight for #stringify is not present.
2. Expand Macro option is not shown but the Inline Macro option is shown(and works as expected).