///
/// \return - The index of the first occurence of \arg Str, or npos if not
/// found.
-size_t StringRef::find(const StringRef &Str) const {
+size_t StringRef::find(StringRef Str) const {
size_t N = Str.size();
if (N > Length)
return npos;
///
/// \return - The index of the last occurence of \arg Str, or npos if not
/// found.
-size_t StringRef::rfind(const StringRef &Str) const {
+size_t StringRef::rfind(StringRef Str) const {
size_t N = Str.size();
if (N > Length)
return npos;
/// count - Return the number of non-overlapped occurrences of \arg Str in
/// the string.
-size_t StringRef::count(const StringRef &Str) const {
+size_t StringRef::count(StringRef Str) const {
size_t Count = 0;
size_t N = Str.size();
if (N > Length)