rintaro@rintaro-m1macbookpro swift-syntax % ./.build/debug/swift-parser-cli print-diags test.swift === test.swift:2 === 1 │ 2 │ let str = """/* foo */ │ ╰─ error: multi-line string literal content must begin on a new line 3 │ foo 4 │

なんで、ParserDiagnosticsではじかれる感じですね