711     constexpr StringPiece piece;  in TEST()  local
712     std::ignore = piece;  in TEST()
716     constexpr StringPiece piece("abc");  in TEST()  local
717     std::ignore = piece;  in TEST()
721     constexpr StringPiece piece("abc", 2);  in TEST()  local
722     std::ignore = piece;  in TEST()
728     constexpr StringPiece piece;  in TEST()  local
729     static_assert(piece.data() == nullptr, "");  in TEST()
733     constexpr StringPiece piece("abc");  in TEST()  local
734     static_assert(piece.data()[0] == 'a', "");  in TEST()
735     static_assert(piece.data()[1] == 'b', "");  in TEST()
736     static_assert(piece.data()[2] == 'c', "");  in TEST()
740     constexpr StringPiece piece("def", 2);  in TEST()  local
741     static_assert(piece.data()[0] == 'd', "");  in TEST()
742     static_assert(piece.data()[1] == 'e', "");  in TEST()
748     constexpr StringPiece piece;  in TEST()  local
749     static_assert(piece.size() == 0, "");  in TEST()
753     constexpr StringPiece piece("abc");  in TEST()  local
754     static_assert(piece.size() == 3, "");  in TEST()
758     constexpr StringPiece piece("def", 2);  in TEST()  local
759     static_assert(piece.size() == 2, "");  in TEST()
764   constexpr StringPiece piece = "def";  in TEST()  local
766   static_assert(piece.compare("ab") == 1, "");  in TEST()
767   static_assert(piece.compare("abc") == 1, "");  in TEST()
768   static_assert(piece.compare("abcd") == 1, "");  in TEST()
769   static_assert(piece.compare("de") == 1, "");  in TEST()
770   static_assert(piece.compare("def") == 0, "");  in TEST()
771   static_assert(piece.compare("defg") == -1, "");  in TEST()
772   static_assert(piece.compare("gh") == -1, "");  in TEST()
773   static_assert(piece.compare("ghi") == -1, "");  in TEST()
774   static_assert(piece.compare("ghij") == -1, "");  in TEST()
778   constexpr StringPiece piece("abc");  in TEST()  local
780   static_assert(piece.starts_with(""), "");  in TEST()
781   static_assert(piece.starts_with("a"), "");  in TEST()
782   static_assert(piece.starts_with("ab"), "");  in TEST()
783   static_assert(piece.starts_with("abc"), "");  in TEST()
785   static_assert(!piece.starts_with("b"), "");  in TEST()
786   static_assert(!piece.starts_with("bc"), "");  in TEST()
788   static_assert(!piece.starts_with("abcd"), "");  in TEST()
792   constexpr StringPiece piece("abc");  in TEST()  local
794   static_assert(piece.ends_with(""), "");  in TEST()
795   static_assert(piece.ends_with("c"), "");  in TEST()
796   static_assert(piece.ends_with("bc"), "");  in TEST()
797   static_assert(piece.ends_with("abc"), "");  in TEST()
799   static_assert(!piece.ends_with("a"), "");  in TEST()
800   static_assert(!piece.ends_with("ab"), "");  in TEST()
802   static_assert(!piece.ends_with("abcd"), "");  in TEST()