https://github.com/apple/swift-syntax/pull/2050 ^ これは私が欲しかったやつ。とてもいい。次のように書けるようになる。

#if canImport(SwiftSyntax510) // code specific to swift-syntax version >= 510 #elseif canImport(SwiftSyntax509) // code to support swift-syntax version 509 #else // code for swift-syntax < 509. Not needed for macros since macros require swift-syntax >= 509. #endif

Add a version indicator macro to indicate the swift-syntax version ...

All swift-syntax versions ≥ 509 will include a module SwiftSyntax509 and all swift-syntax versions ≥ 510 will include both SwiftSyntax509 and SwiftSyntax510. This way clients can check which versio...