Noir::SwiftLexer

SwiftLexer is a hand-rolled structural masking lexer for Swift source, modelled on Noir::PhpLexer, Noir::CSharpLexer, and Noir::ScalaLexer.

Swift routes and brace counting used to be performed line-by-line or with ad-hoc regexes, causing:

• Delimiters ({, }, (, )) in string literals and comments to truncate closures or corrupt group scopes.
• Route-shaped literals in documentation or comments (e.g. app.get("fake")) to be falsely detected as endpoints.
• Multi-line """ strings, raw strings (#"..."#, ##"..."##), and nested block comments (/* /* */ */) to corrupt parser state across lines.

This lexer performs a single linear pass that blanks every non-code region (comments and string literal contents) to spaces while keeping newlines and delimiters (", """, #", "#, etc., //, /*, */), and keeping code inside string interpolations \( unmasked so braces inside interpolations stay balanced.