Replaced rune-slice parameters with string parameters in functions; avoids unnecessary conversion from strings to rune-slices

matching.go

@@ -97,7 +97,7 @@ func findAllMatchesHelper(start *State, str string, indices []matchIndex, offset
 
 	// Increment until we hit a character matching the start state (assuming not 0-state)
 	if start.isEmpty == false {
-		for i < len(str) && !start.contentContains([]rune(str), i) {
+		for i < len(str) && !start.contentContains(str, i) {
 			i++
 		}
 		startIdx = i
@@ -136,7 +136,7 @@ func findAllMatchesHelper(start *State, str string, indices []matchIndex, offset
 		numStatesMatched := 0    // The number of states which had at least 1 match for this round
 		assertionFailed := false // Whether or not an assertion failed for this round
 		for _, state := range currentStates {
-			matches, numMatches := state.matchesFor([]rune(str), i)
+			matches, numMatches := state.matchesFor(str, i)
 			if numMatches > 0 {
 				numStatesMatched++
 				tempStates = append(tempStates, matches...)
@@ -211,7 +211,7 @@ func findAllMatchesHelper(start *State, str string, indices []matchIndex, offset
 		// Only add the match if the start index is in bounds. If the state has an assertion,
 		// make sure the assertion checks out.
 		if state.isLast && startIdx < len(str) {
-			if state.assert == NONE || state.checkAssertion([]rune(str), len(str)) {
+			if state.assert == NONE || state.checkAssertion(str, len(str)) {
 				endIdx = i
 				tempIndices, _ = unique_append(tempIndices, matchIndex{startIdx, endIdx})
 			}