26 class StringPiece {
28     StringPiece() : mData(nullptr), mLength(0) {}  in StringPiece()  function
29     StringPiece(const char* data) : mData(data), mLength(data == nullptr ? 0 : strlen(data)) {}  in StringPiece()  function
30     StringPiece(const char* data, size_t length) : mData(data), mLength(length) {}  in StringPiece()  function
31     StringPiece(const std::string& str) : mData(str.data()), mLength(str.size()) {}  in StringPiece()  function
32     StringPiece(std::string_view str) : mData(str.data()), mLength(str.size()) {}  in StringPiece()  function
41     inline StringPiece substr(size_t from, size_t length) const {  in substr()
42         return StringPiece(mData + from, length);  in substr()
60 inline bool operator==(const StringPiece& l, const StringPiece& r) {
73 inline bool operator==(const StringPiece& l, const char* s) {
81 inline bool operator!=(const StringPiece& l, const StringPiece& r) {
85 inline bool operator!=(const StringPiece& l, const char* s) {
91     SplitIterator(const StringPiece& string, char delimiter)  in SplitIterator()
94     inline StringPiece next() {  in next()
96             return StringPiece();  in next()
108     StringPiece mString;