Start HTMLEntityDecoded.

Modules/Parser/Sources/SAX/HTMLEntityDecoder.swift

@@ -18,8 +18,8 @@ public final class HTMLEntityDecoder {
 
 		while true {
 
-			var scannedString = nil
-			if scanner.scanUpToString("&" intoString: &scannedString) {
+			var scannedString: NSString? = nil
+			if scanner.scanUpTo("&", into: &scannedString) {
 				result.append(scannedString)
 			}
 			if scanner.isAtEnd {
@@ -37,7 +37,7 @@ public final class HTMLEntityDecoder {
 				result.append("&")
 				scanner.scanLocation = savedScanLocation + 1
 			}
-			
+
 			if scanner.isAtEnd {
 				break
 			}
@@ -49,3 +49,43 @@ public final class HTMLEntityDecoder {
 		return result
 	}
 }
+
+/// Purpose-built version of NSScanner, which has deprecated the parts we want to use.
+final class RSScanner {
+
+	let string: String
+	let count: Int
+	var scanLocation = 0
+
+	var isAtEnd {
+		scanLocation >= count - 1
+	}
+
+	init(string: String) {
+		self.string = string
+		self.count = string.count
+	}
+
+	/// Scans up to `characterToFind` and returns the characters up to (and not including) `characterToFind`.
+	/// - Returns: nil when there were no characters accumulated (next character was `characterToFind` or already at end of string)
+	func scanUpTo(_ characterToFind: Character) -> String? {
+
+		if isAtEnd {
+			return nil
+		}
+
+		while true {
+
+
+		}
+	}
+
+	private func currentCharacter() -> Character? {
+
+
+
+	}
+
+	private func 
+
+}