ExpectOneOfString returns bool if string was found

errors.go

@@ -6,5 +6,4 @@ import (
 
 var (
 	ErrNothingToUnread = adverr.NewErrTmpl("ErrNothingToUnread", "Unreading failed because there wasn't any Read yet")
-	ErrNoMatchFound    = adverr.NewErrTmpl("ErrNoMatchFound", "no match found")
 )

reader.go

@@ -233,21 +233,21 @@ func (r *Reader) ExpectString(str string) (bool, error) {
 
 // ExpectOneOfString calls ExpectString for each string successively
 // and returns the string which first matched.
+// The boolean value is true if any string was found.
 // The returned string will not be unread.
-// If no string matches, ErrNoMatchFound is returned
-func (r *Reader) ExpectOneOfString(str ...string) (string, error) {
+func (r *Reader) ExpectOneOfString(str ...string) (string, bool, error) {
 	for _, s := range str {
 		ok, err := r.ExpectString(s)
 		if err != nil {
-			return "", err
+			return "", false, err
 		}
 
 		if ok {
-			return s, nil
+			return s, true, nil
 		}
 	}
 
-	return "", ErrNoMatchFound.New()
+	return "", false, nil
 }
 
 // Commit clears the internal buffer and therefore removes all data which were already read.