Updates for Swift 5.1

lib/rouge/lexers/swift.rb

@@ -25,7 +25,7 @@ class Swift < RegexLexer
       )
 
       declarations = Set.new %w(
-        class deinit enum convenience extension final func import init internal lazy let optional private protocol public required static struct subscript typealias var dynamic indirect associatedtype open fileprivate
+        class deinit enum convenience extension final func import init internal lazy let optional private protocol public required static struct subscript typealias var dynamic indirect associatedtype open fileprivate some
       )
 
       constants = Set.new %w(
@@ -110,6 +110,8 @@ class deinit enum convenience extension final func import init internal lazy let
           groups Keyword, Text, Name::Variable
         end
 
+        rule %r/\\\.(#{id})/, Keyword::Type
+
         rule %r/(let|var)\b(\s*)([(])/ do
           groups Keyword, Text, Punctuation
           push :tuple

spec/visual/samples/swift

@@ -432,4 +432,23 @@ funcWithLambdaArg { x in x + 5 }
 funcWithLambdaArg { $0 + 5 }
 funcWithLambdaArg({ x in x + 5 })
 
+func newView() -> some View {
+	ViewRegistry.find(\.MyView.name)
+}
+
+@frozen
+public enum Types {
+	case a, b, c
+	case d
+}
+
+func test(t: Types?) -> Bool {
+	switch t {
+	case .a?: return true
+	case .b?: return true
+	case .c: return true
+	default: return false
+	}
+}
+
 foo() // end-of-file comment