Initial support for multiple matching

main.go

@@ -178,14 +178,21 @@ func main() {
 	re_postfix := shuntingYard(re)
 	// fmt.Println(re_postfix)
 	startState := thompson(re_postfix)
-	start, end, matched := match(startState, os.Args[2])
-	if matched {
+	matchIndices := match(startState, os.Args[2])
+	inColor := false
+	if len(matchIndices) > 0 {
 		for i, c := range os.Args[2] {
-			if i >= start && i < end {
-				color.New(color.FgRed).Printf("%c", c)
-			} else {
+			for _, indices := range matchIndices {
+				if i >= indices.startIdx && i < indices.endIdx {
+					color.New(color.FgRed).Printf("%c", c)
+					inColor = true
+					break
+				}
+			}
+			if inColor == false {
 				fmt.Printf("%c", c)
 			}
+			inColor = false
 		}
 		fmt.Printf("\n")
 	} else {