Wrote toString function for MatchIndex

matching.go

@@ -1,6 +1,9 @@
 package main
 
-import "sort"
+import (
+	"fmt"
+	"sort"
+)
 
 // a MatchIndex represents a match/group. It contains the start index and end index of the match
 type MatchIndex struct {
@@ -8,10 +11,10 @@ type MatchIndex struct {
 	endIdx   int
 }
 
-// A Match represents multiple matchIndices. Specifically, it maps an integer (representing the capturing group)
-// to the matchIndex of that group.
-// Group 0 corresponds to the entire match.
-type Match map[int]MatchIndex
+// Converts the MatchIndex into a string representation:
+func (idx MatchIndex) toString() string {
+	return fmt.Sprintf("%d\t%d", idx.startIdx, idx.endIdx)
+}
 
 // takeZeroState takes the 0-state (if such a transition exists) for all states in the
 // given slice. It returns the resulting states. If any of the resulting states is a 0-state,