Matcher to implement MatchResult.

src/main/java/com/humio/jitrex/Matcher.java

@@ -8,8 +8,9 @@
 import com.humio.jitrex.util.Regex;
 
 import java.util.*;
+import java.util.regex.MatchResult;
 
-public class Matcher {
+public class Matcher implements MatchResult {
     private final Pattern pattern;
     protected CharSequence input;
     protected final Regex re;
@@ -54,6 +55,10 @@ public int compare(Pattern.VarEntry o1, Pattern.VarEntry o2) {
 
     private static Map<String,String> EMPTY_MAP = new HashMap<>();
 
+    public Pattern pattern() {
+        return pattern;
+    }
+
     public void reset() {
         reset(input, EMPTY_MAP);
     }