test regex literals

Author: TTOzzi

Sources/SwiftFormat/Core/RuleMask.swift

@@ -97,6 +97,8 @@ extension SourceRange {
 
 /// Represents the kind of ignore directive encountered in the source.
 enum IgnoreDirective: CustomStringConvertible {
+  typealias RegexExpression = Regex<(Substring, ruleNames: Substring?)>
+
   /// A node-level directive that disables rules for the following node and its children.
   case node
   /// A file-level directive that disables rules for the entire file.
@@ -113,9 +115,13 @@ enum IgnoreDirective: CustomStringConvertible {
 
   /// Regex pattern to match an ignore directive comment.
   /// - Capture group #1 captures the rule names if `":"` is present.
-  fileprivate func makeRegex() -> Regex<(Substring, Substring?)> {
-    let pattern = #"^\s*\/\/\s*"# + description + #"(?:\s*:\s*(.+))?$"#
-    return try! Regex(pattern)
+  fileprivate func makeRegex() -> RegexExpression {
+    switch self {
+    case .node:
+      return #/^\s*\/\/\s*swift-format-ignore(?:\s*:\s*(?<ruleNames>.+))?$/#
+    case .file:
+      return #/^\s*\/\/\s*swift-format-ignore-file(?:\s*:\s*(?<ruleNames>.+))?$/#
+    }
   }
 }
 
@@ -141,10 +147,10 @@ fileprivate class RuleStatusCollectionVisitor: SyntaxVisitor {
   private let sourceLocationConverter: SourceLocationConverter
 
   /// Cached regex object for ignoring rules at the node.
-  private let ignoreRegex: Regex<(Substring, Substring?)>
+  private let ignoreRegex: IgnoreDirective.RegexExpression
 
   /// Cached regex object for ignoring rules at the file.
-  private let ignoreFileRegex: Regex<(Substring, Substring?)>
+  private let ignoreFileRegex: IgnoreDirective.RegexExpression
 
   /// Stores the source ranges in which all rules are ignored.
   var allRulesIgnoredRanges: [SourceRange] = []
@@ -203,7 +209,7 @@ fileprivate class RuleStatusCollectionVisitor: SyntaxVisitor {
   private func appendRuleStatus(
     from token: TokenSyntax,
     of sourceRange: SourceRange,
-    using regex: Regex<(Substring, Substring?)>
+    using regex: IgnoreDirective.RegexExpression
   ) -> SyntaxVisitorContinueKind {
     let isFirstInFile = token.previousToken(viewMode: .sourceAccurate) == nil
     let comments = loneLineComments(in: token.leadingTrivia, isFirstToken: isFirstInFile)
@@ -228,12 +234,12 @@ fileprivate class RuleStatusCollectionVisitor: SyntaxVisitor {
   /// match, its contents (e.g. list of rule names) are returned.
   private func ruleStatusDirectiveMatch(
     in text: String,
-    using regex: Regex<(Substring, Substring?)>
+    using regex: IgnoreDirective.RegexExpression
   ) -> RuleStatusDirectiveMatch? {
     guard let match = text.firstMatch(of: regex) else {
       return nil
     }
-    guard let matchedRuleNames = match.output.1 else {
+    guard let matchedRuleNames = match.output.ruleNames else {
       return .all
     }
     let rules = matchedRuleNames.split(separator: ",")