+/// find_last_not_of - Find the last character in the string that is not
+/// \arg C, or npos if not found.
+StringRef::size_type StringRef::find_last_not_of(char C, size_t From) const {
+ for (size_type i = std::min(From, Length) - 1, e = -1; i != e; --i)
+ if (Data[i] != C)
+ return i;
+ return npos;
+}
+
+/// find_last_not_of - Find the last character in the string that is not in
+/// \arg Chars, or npos if not found.
+///
+/// Note: O(size() + Chars.size())
+StringRef::size_type StringRef::find_last_not_of(StringRef Chars,
+ size_t From) const {
+ std::bitset<1 << CHAR_BIT> CharBits;
+ for (size_type i = 0, e = Chars.size(); i != e; ++i)
+ CharBits.set((unsigned char)Chars[i]);
+
+ for (size_type i = std::min(From, Length) - 1, e = -1; i != e; --i)
+ if (!CharBits.test((unsigned char)Data[i]))
+ return i;
+ return npos;
+}
+