diff --git a/c10/test/util/string_view_test.cpp b/c10/test/util/string_view_test.cpp
index 8f6bde0dce4..676cda059ca 100644
--- a/c10/test/util/string_view_test.cpp
+++ b/c10/test/util/string_view_test.cpp
@@ -36,574 +36,6 @@ inline void expectThrows(Functor&& functor, const char* expectMessageContains) {
 using testutils::expectThrows;
 using testutils::string_equal;
 
-namespace test_typedefs {
-static_assert(std::is_same_v<char, string_view::value_type>, "");
-static_assert(std::is_same_v<char*, string_view::pointer>, "");
-static_assert(std::is_same_v<const char*, string_view::const_pointer>, "");
-static_assert(std::is_same_v<char&, string_view::reference>, "");
-static_assert(std::is_same_v<const char&, string_view::const_reference>, "");
-static_assert(std::is_same_v<std::size_t, string_view::size_type>, "");
-static_assert(std::is_same_v<std::ptrdiff_t, string_view::difference_type>, "");
-} // namespace test_typedefs
-
-namespace test_default_constructor {
-static_assert(string_view().empty());
-static_assert(string_view().data() == nullptr, "");
-static_assert(string_view() == string_view(""));
-} // namespace test_default_constructor
-
-namespace test_constchar_constructor {
-static_assert(string_view("").size() == 0, "");
-constexpr string_view hello = "hello";
-static_assert(5 == hello.size(), "");
-static_assert(string_equal("hello", hello.data(), hello.size()), "");
-} // namespace test_constchar_constructor
-
-namespace test_sized_constructor {
-static_assert(string_view("", 0).size() == 0, "");
-constexpr string_view hell("hello", 4);
-static_assert(4 == hell.size(), "");
-static_assert(string_equal("hell", hell.data(), hell.size()), "");
-} // namespace test_sized_constructor
-
-namespace test_string_constructor {
-void test_conversion_is_implicit(string_view a) {}
-TEST(StringViewTest, testStringConstructor) {
-  std::string empty;
-  EXPECT_EQ(0, string_view(empty).size());
-  std::string hello_str = "hello";
-  string_view hello_sv = hello_str;
-  EXPECT_EQ(5, hello_sv.size());
-  EXPECT_TRUE(string_equal("hello", hello_sv.data(), hello_sv.size()));
-
-  test_conversion_is_implicit(hello_str);
-}
-} // namespace test_string_constructor
-
-namespace test_std_string_view_constructor {
-void test_std_string_view_conversion_is_implicit(c10::string_view a) {}
-TEST(StringViewTest, testStringViewConstructor) {
-  std::string_view empty;
-  EXPECT_EQ(0, c10::string_view(empty).size());
-  std::string_view hello_std_sv = "hello";
-  c10::string_view hello_sv = hello_std_sv;
-  EXPECT_EQ(5, hello_sv.size());
-  EXPECT_TRUE(string_equal("hello", hello_sv.data(), hello_sv.size()));
-
-  test_std_string_view_conversion_is_implicit(hello_std_sv);
-}
-} // namespace test_std_string_view_constructor
-
-namespace test_conversion_to_string {
-TEST(StringViewTest, testConversionToString) {
-  string_view empty;
-  EXPECT_EQ(0, std::string(empty).size());
-  string_view hello_sv = "hello";
-  std::string hello_str(hello_sv);
-  EXPECT_EQ(5, hello_str.size());
-  EXPECT_EQ(std::string("hello"), hello_str);
-}
-} // namespace test_conversion_to_string
-
-namespace test_conversion_to_std_string_view {
-TEST(StringViewTest, testConversionToStringView) {
-  c10::string_view empty;
-  EXPECT_EQ(0, std::string_view(empty).size());
-  c10::string_view hello_sv = "hello";
-  std::string_view hello_str(hello_sv);
-  EXPECT_EQ(5, hello_str.size());
-  EXPECT_EQ(std::string_view("hello"), hello_str);
-}
-} // namespace test_conversion_to_std_string_view
-
-namespace test_copy_constructor {
-constexpr string_view hello = "hello";
-constexpr string_view copy = hello;
-static_assert(5 == copy.size(), "");
-static_assert(string_equal("hello", copy.data(), copy.size()), "");
-} // namespace test_copy_constructor
-
-namespace test_copy_assignment {
-constexpr string_view assign(string_view value) {
-  string_view result = "temporary_content";
-  result = value; // this is the assignment we're testing
-  return result;
-}
-TEST(StringViewTest, testCopyAssignment) {
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201304
-  {
-    constexpr string_view hello = assign("hello");
-    static_assert(5 == hello.size(), "");
-    static_assert(string_equal("hello", hello.data(), hello.size()), "");
-
-    static_assert(5 == (string_view() = "hello").size(), "");
-    static_assert(
-        string_equal("hello", (string_view() = "hello").data(), 5), "");
-  }
-#endif
-  const string_view hello = assign("hello");
-  EXPECT_EQ(5, hello.size());
-  EXPECT_EQ("hello", hello);
-  EXPECT_EQ(5, (string_view() = "hello").size());
-  EXPECT_EQ("hello", (string_view() = "hello"));
-}
-
-} // namespace test_copy_assignment
-
-namespace test_iterators {
-static_assert('h' == *string_view("hello").begin(), "");
-static_assert('h' == *string_view("hello").cbegin(), "");
-static_assert('h' == *begin(string_view("hello")), "");
-static_assert('o' == *(string_view("hello").end() - 1), "");
-static_assert('o' == *(string_view("hello").cend() - 1), "");
-static_assert('o' == *(end(string_view("hello")) - 1), "");
-static_assert('o' == *string_view("hello").rbegin(), "");
-static_assert('o' == *string_view("hello").crbegin(), "");
-static_assert('h' == *(string_view("hello").rend() - 1), "");
-static_assert('h' == *(string_view("hello").crend() - 1), "");
-} // namespace test_iterators
-
-namespace test_forward_iteration {
-constexpr string_view hello = "hello";
-static_assert('h' == *(hello.begin() + 0), "");
-static_assert('e' == *(hello.begin() + 1), "");
-static_assert('l' == *(hello.begin() + 2), "");
-static_assert('l' == *(hello.begin() + 3), "");
-static_assert('o' == *(hello.begin() + 4), "");
-static_assert(hello.end() == hello.begin() + 5, "");
-} // namespace test_forward_iteration
-
-namespace test_reverse_iteration {
-constexpr string_view hello = "hello";
-static_assert('o' == *(hello.rbegin() + 0), "");
-static_assert('l' == *(hello.rbegin() + 1), "");
-static_assert('l' == *(hello.rbegin() + 2), "");
-static_assert('e' == *(hello.rbegin() + 3), "");
-static_assert('h' == *(hello.rbegin() + 4), "");
-static_assert(hello.rend() == hello.rbegin() + 5, "");
-} // namespace test_reverse_iteration
-
-namespace test_random_access {
-constexpr string_view hello = "hello";
-static_assert('h' == hello[0], "");
-static_assert('e' == hello[1], "");
-static_assert('l' == hello[2], "");
-static_assert('l' == hello[3], "");
-static_assert('o' == hello[4], "");
-
-static_assert('h' == hello.at(0), "");
-static_assert('e' == hello.at(1), "");
-static_assert('l' == hello.at(2), "");
-static_assert('l' == hello.at(3), "");
-static_assert('o' == hello.at(4), "");
-
-TEST(StringViewTest, whenCallingAccessOperatorOutOfRange_thenThrows) {
-  expectThrows<std::out_of_range>(
-      [] { string_view("").at(1); },
-      "string_view::operator[] or string_view::at() out of range. Index: 1, size: 0");
-
-  expectThrows<std::out_of_range>(
-      [] { string_view("hello").at(5); },
-      "string_view::operator[] or string_view::at() out of range. Index: 5, size: 5");
-
-  expectThrows<std::out_of_range>(
-      [] { string_view("hello").at(100); },
-      "string_view::operator[] or string_view::at() out of range. Index: 100, size: 5");
-
-  expectThrows<std::out_of_range>(
-      [] { string_view("hello").at(string_view::npos); },
-      "string_view::operator[] or string_view::at() out of range. Index: 18446744073709551615, size: 5");
-}
-} // namespace test_random_access
-
-namespace test_front_back {
-static_assert('h' == string_view("hello").front(), "");
-static_assert('o' == string_view("hello").back(), "");
-} // namespace test_front_back
-
-namespace test_data {
-static_assert(string_equal("hello", string_view("hello").data(), 5), "");
-} // namespace test_data
-
-namespace test_size_length {
-static_assert(0 == string_view("").size(), "");
-static_assert(5 == string_view("hello").size(), "");
-
-static_assert(0 == string_view("").length(), "");
-static_assert(5 == string_view("hello").length(), "");
-} // namespace test_size_length
-
-namespace test_empty {
-static_assert(string_view().empty(), "");
-static_assert(string_view("").empty(), "");
-static_assert(!string_view("hello").empty(), "");
-} // namespace test_empty
-
-namespace test_remove_prefix {
-constexpr string_view remove_prefix(string_view input, size_t len) {
-  input.remove_prefix(len);
-  return input;
-}
-
-TEST(StringViewTest, whenRemovingValidPrefix_thenWorks) {
-  static_assert(
-      remove_prefix(string_view("hello"), 0) == string_view("hello"), "");
-  static_assert(
-      remove_prefix(string_view("hello"), 1) == string_view("ello"), "");
-  static_assert(remove_prefix(string_view("hello"), 5) == string_view(""), "");
-
-  EXPECT_EQ(remove_prefix(string_view("hello"), 0), string_view("hello"));
-  EXPECT_EQ(remove_prefix(string_view("hello"), 1), string_view("ello"));
-  EXPECT_EQ(remove_prefix(string_view("hello"), 5), string_view(""));
-}
-
-TEST(StringViewTest, whenRemovingTooLargePrefix_thenThrows) {
-  expectThrows<std::out_of_range>(
-      [] { remove_prefix(string_view("hello"), 6); },
-      "basic_string_view::remove_prefix: out of range. PrefixLength: 6, size: 5");
-}
-} // namespace test_remove_prefix
-
-namespace test_remove_suffix {
-constexpr string_view remove_suffix(string_view input, size_t len) {
-  input.remove_suffix(len);
-  return input;
-}
-
-TEST(StringViewTest, whenRemovingValidSuffix_thenWorks) {
-  static_assert(
-      remove_suffix(string_view("hello"), 0) == string_view("hello"), "");
-  static_assert(
-      remove_suffix(string_view("hello"), 1) == string_view("hell"), "");
-  static_assert(remove_suffix(string_view("hello"), 5) == string_view(""), "");
-
-  EXPECT_EQ(remove_suffix(string_view("hello"), 0), string_view("hello"));
-  EXPECT_EQ(remove_suffix(string_view("hello"), 1), string_view("hell"));
-  EXPECT_EQ(remove_suffix(string_view("hello"), 5), string_view(""));
-}
-
-TEST(StringViewTest, whenRemovingTooLargeSuffix_thenThrows) {
-  expectThrows<std::out_of_range>(
-      [] { remove_suffix(string_view("hello"), 6); },
-      "basic_string_view::remove_suffix: out of range. SuffixLength: 6, size: 5");
-}
-} // namespace test_remove_suffix
-
-namespace test_swap_function {
-constexpr std::pair<string_view, string_view> get() {
-  string_view first = "first";
-  string_view second = "second";
-  swap(first, second);
-  return std::make_pair(first, second);
-}
-TEST(StringViewTest, testSwapFunction) {
-  static_assert(string_view("second") == get().first, "");
-  static_assert(string_view("first") == get().second, "");
-
-  EXPECT_EQ(string_view("second"), get().first);
-  EXPECT_EQ(string_view("first"), get().second);
-}
-} // namespace test_swap_function
-
-namespace test_swap_method {
-constexpr std::pair<string_view, string_view> get() {
-  string_view first = "first";
-  string_view second = "second";
-  first.swap(second);
-  return std::make_pair(first, second);
-}
-TEST(StringViewTest, testSwapMethod) {
-  static_assert(string_view("second") == get().first, "");
-  static_assert(string_view("first") == get().second, "");
-
-  EXPECT_EQ(string_view("second"), get().first);
-  EXPECT_EQ(string_view("first"), get().second);
-}
-} // namespace test_swap_method
-
-namespace test_copy {
-TEST(StringViewTest, whenCopyingFullStringView_thenDestinationHasCorrectData) {
-  string_view data = "hello";
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,cppcoreguidelines-avoid-magic-numbers,modernize-avoid-c-arrays)
-  char result[5];
-  size_t num_copied = data.copy(result, 5);
-  EXPECT_EQ(5, num_copied);
-  EXPECT_TRUE(string_equal("hello", result, 5));
-}
-
-TEST(StringViewTest, whenCopyingSubstr_thenDestinationHasCorrectData) {
-  string_view data = "hello";
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,modernize-avoid-c-arrays)
-  char result[2];
-  size_t num_copied = data.copy(result, 2, 2);
-  EXPECT_EQ(2, num_copied);
-  EXPECT_TRUE(string_equal("ll", result, 2));
-}
-
-TEST(StringViewTest, whenCopyingTooMuch_thenJustCopiesLess) {
-  string_view data = "hello";
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,cppcoreguidelines-avoid-magic-numbers,modernize-avoid-c-arrays)
-  char result[100];
-  size_t num_copied = data.copy(result, 100, 2);
-  EXPECT_EQ(3, num_copied);
-  EXPECT_TRUE(string_equal("llo", result, 3));
-}
-
-TEST(StringViewTest, whenCopyingJustAtRange_thenDoesntCrash) {
-  string_view data = "hello";
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,modernize-avoid-c-arrays)
-  char result[1];
-  size_t num_copied = data.copy(result, 2, 5);
-  EXPECT_EQ(0, num_copied);
-}
-
-TEST(StringViewTest, whenCopyingOutOfRange_thenThrows) {
-  string_view data = "hello";
-  // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,modernize-avoid-c-arrays)
-  char result[2];
-  expectThrows<std::out_of_range>(
-      // NOLINTNEXTLINE(cppcoreguidelines-avoid-c-arrays,cppcoreguidelines-avoid-magic-numbers,modernize-avoid-c-arrays)
-      [&] { data.copy(result, 2, 6); },
-      "basic_string_view::copy: out of range. Index: 6, size: 5");
-}
-} // namespace test_copy
-
-namespace test_substr {
-static_assert(string_view("").substr() == string_view(""), "");
-static_assert(string_view("").substr(0) == string_view(""), "");
-static_assert(string_view("").substr(0, 0) == string_view(""), "");
-
-static_assert(string_view("hello").substr() == string_view("hello"), "");
-static_assert(string_view("hello").substr(0) == string_view("hello"), "");
-static_assert(string_view("hello").substr(1) == string_view("ello"), "");
-static_assert(string_view("hello").substr(5) == string_view(""), "");
-
-static_assert(string_view("hello").substr(0, 0) == string_view(""), "");
-static_assert(string_view("hello").substr(0, 2) == string_view("he"), "");
-static_assert(string_view("hello").substr(1, 2) == string_view("el"), "");
-static_assert(string_view("hello").substr(4, 1) == string_view("o"), "");
-
-static_assert(string_view("hello").substr(0, 100) == string_view("hello"), "");
-static_assert(string_view("hello").substr(1, 100) == string_view("ello"), "");
-static_assert(string_view("hello").substr(5, 100) == string_view(""), "");
-
-TEST(StringViewTest, whenCallingSubstrWithPosOutOfRange_thenThrows) {
-  expectThrows<std::out_of_range>(
-      [] { string_view("hello").substr(6); },
-      "basic_string_view::substr parameter out of bounds. Index: 6, size: 5");
-
-  expectThrows<std::out_of_range>(
-      [] { string_view("hello").substr(6, 0); },
-      "basic_string_view::substr parameter out of bounds. Index: 6, size: 5");
-}
-} // namespace test_substr
-
-namespace test_compare_overload1 {
-static_assert(0 == string_view("").compare(string_view("")), "");
-static_assert(0 == string_view("a").compare(string_view("a")), "");
-static_assert(0 == string_view("hello").compare(string_view("hello")), "");
-static_assert(0 < string_view("hello").compare(string_view("")), "");
-static_assert(0 < string_view("hello").compare(string_view("aello")), "");
-static_assert(0 < string_view("hello").compare(string_view("a")), "");
-static_assert(
-    0 < string_view("hello").compare(string_view("abcdefghijklmno")),
-    "");
-static_assert(0 < string_view("hello").compare(string_view("hela")), "");
-static_assert(0 < string_view("hello").compare(string_view("helao")), "");
-static_assert(
-    0 < string_view("hello").compare(string_view("helaobcdefgh")),
-    "");
-static_assert(0 < string_view("hello").compare(string_view("hell")), "");
-static_assert(0 > string_view("").compare(string_view("hello")), "");
-static_assert(0 > string_view("hello").compare(string_view("zello")), "");
-static_assert(0 > string_view("hello").compare(string_view("z")), "");
-static_assert(
-    0 > string_view("hello").compare(string_view("zabcdefghijklmno")),
-    "");
-static_assert(0 > string_view("hello").compare(string_view("helz")), "");
-static_assert(0 > string_view("hello").compare(string_view("helzo")), "");
-static_assert(
-    0 > string_view("hello").compare(string_view("helzobcdefgh")),
-    "");
-static_assert(0 > string_view("hello").compare(string_view("helloa")), "");
-} // namespace test_compare_overload1
-
-namespace test_compare_overload2 {
-static_assert(0 == string_view("").compare(0, 0, string_view("")), "");
-static_assert(0 == string_view("hello").compare(2, 2, string_view("ll")), "");
-static_assert(0 < string_view("hello").compare(2, 2, string_view("l")), "");
-static_assert(0 > string_view("hello").compare(2, 2, string_view("lll")), "");
-static_assert(0 < string_view("hello").compare(2, 2, string_view("la")), "");
-static_assert(0 > string_view("hello").compare(2, 2, string_view("lz")), "");
-} // namespace test_compare_overload2
-
-namespace test_compare_overload3 {
-static_assert(0 == string_view("").compare(0, 0, string_view(""), 0, 0), "");
-static_assert(
-    0 == string_view("hello").compare(2, 2, string_view("hello"), 2, 2),
-    "");
-static_assert(
-    0 < string_view("hello").compare(2, 2, string_view("hello"), 2, 1),
-    "");
-static_assert(
-    0 > string_view("hello").compare(2, 2, string_view("hello"), 2, 3),
-    "");
-static_assert(
-    0 < string_view("hello").compare(2, 2, string_view("hellola"), 5, 2),
-    "");
-static_assert(
-    0 > string_view("hello").compare(2, 2, string_view("hellolz"), 5, 2),
-    "");
-} // namespace test_compare_overload3
-
-namespace test_compare_overload4 {
-static_assert(0 == string_view("").compare(""), "");
-static_assert(0 == string_view("a").compare("a"), "");
-static_assert(0 == string_view("hello").compare("hello"), "");
-static_assert(0 < string_view("hello").compare(""), "");
-static_assert(0 < string_view("hello").compare("aello"), "");
-static_assert(0 < string_view("hello").compare("a"), "");
-static_assert(0 < string_view("hello").compare("abcdefghijklmno"), "");
-static_assert(0 < string_view("hello").compare("hela"), "");
-static_assert(0 < string_view("hello").compare("helao"), "");
-static_assert(0 < string_view("hello").compare("helaobcdefgh"), "");
-static_assert(0 < string_view("hello").compare("hell"), "");
-static_assert(0 > string_view("").compare("hello"), "");
-static_assert(0 > string_view("hello").compare("zello"), "");
-static_assert(0 > string_view("hello").compare("z"), "");
-static_assert(0 > string_view("hello").compare("zabcdefghijklmno"), "");
-static_assert(0 > string_view("hello").compare("helz"), "");
-static_assert(0 > string_view("hello").compare("helzo"), "");
-static_assert(0 > string_view("hello").compare("helzobcdefgh"), "");
-static_assert(0 > string_view("hello").compare("helloa"), "");
-} // namespace test_compare_overload4
-
-namespace test_compare_overload5 {
-static_assert(0 == string_view("").compare(0, 0, ""), "");
-static_assert(0 == string_view("hello").compare(2, 2, "ll"), "");
-static_assert(0 < string_view("hello").compare(2, 2, "l"), "");
-static_assert(0 > string_view("hello").compare(2, 2, "lll"), "");
-static_assert(0 < string_view("hello").compare(2, 2, "la"), "");
-static_assert(0 > string_view("hello").compare(2, 2, "lz"), "");
-} // namespace test_compare_overload5
-
-namespace test_compare_overload6 {
-static_assert(0 == string_view("").compare(0, 0, "", 0, 0), "");
-static_assert(0 == string_view("hello").compare(2, 2, "hello", 2, 2), "");
-static_assert(0 < string_view("hello").compare(2, 2, "hello", 2, 1), "");
-static_assert(0 > string_view("hello").compare(2, 2, "hello", 2, 3), "");
-static_assert(0 < string_view("hello").compare(2, 2, "hellola", 5, 2), "");
-static_assert(0 > string_view("hello").compare(2, 2, "hellolz", 5, 2), "");
-} // namespace test_compare_overload6
-
-namespace test_equality_comparison {
-static_assert(string_view("hi") == string_view("hi"), "");
-static_assert(!(string_view("hi") != string_view("hi")), "");
-
-static_assert(string_view("") == string_view(""), "");
-static_assert(!(string_view("") != string_view("")), "");
-
-static_assert(string_view("hi") != string_view("hi2"), "");
-static_assert(!(string_view("hi") == string_view("hi2")), "");
-
-static_assert(string_view("hi2") != string_view("hi"), "");
-static_assert(!(string_view("hi2") == string_view("hi")), "");
-
-static_assert(string_view("hi") != string_view("ha"), "");
-static_assert(!(string_view("hi") == string_view("ha")), "");
-
-static_assert(string_view("ha") != string_view("hi"), "");
-static_assert(!(string_view("ha") == string_view("hi")), "");
-} // namespace test_equality_comparison
-
-namespace test_less_than {
-static_assert(!(string_view("") < string_view("")), "");
-static_assert(!(string_view("a") < string_view("a")), "");
-static_assert(!(string_view("hello") < string_view("hello")), "");
-static_assert(!(string_view("hello") < string_view("")), "");
-static_assert(!(string_view("hello") < string_view("aello")), "");
-static_assert(!(string_view("hello") < string_view("a")), "");
-static_assert(!(string_view("hello") < string_view("abcdefghijklmno")), "");
-static_assert(!(string_view("hello") < string_view("hela")), "");
-static_assert(!(string_view("hello") < string_view("helao")), "");
-static_assert(!(string_view("hello") < string_view("helaobcdefgh")), "");
-static_assert(!(string_view("hello") < string_view("hell")), "");
-static_assert(string_view("") < string_view("hello"), "");
-static_assert(string_view("hello") < string_view("zello"), "");
-static_assert(string_view("hello") < string_view("z"), "");
-static_assert(string_view("hello") < string_view("zabcdefghijklmno"), "");
-static_assert(string_view("hello") < string_view("helz"), "");
-static_assert(string_view("hello") < string_view("helzo"), "");
-static_assert(string_view("hello") < string_view("helzobcdefgh"), "");
-static_assert(string_view("hello") < string_view("helloa"), "");
-} // namespace test_less_than
-
-namespace test_less_or_equal_than {
-static_assert(string_view("") <= string_view(""), "");
-static_assert(string_view("a") <= string_view("a"), "");
-static_assert(string_view("hello") <= string_view("hello"), "");
-static_assert(!(string_view("hello") <= string_view("")), "");
-static_assert(!(string_view("hello") <= string_view("aello")), "");
-static_assert(!(string_view("hello") <= string_view("a")), "");
-static_assert(!(string_view("hello") <= string_view("abcdefghijklmno")), "");
-static_assert(!(string_view("hello") <= string_view("hela")), "");
-static_assert(!(string_view("hello") <= string_view("helao")), "");
-static_assert(!(string_view("hello") <= string_view("helaobcdefgh")), "");
-static_assert(!(string_view("hello") <= string_view("hell")), "");
-static_assert(string_view("") <= string_view("hello"), "");
-static_assert(string_view("hello") <= string_view("zello"), "");
-static_assert(string_view("hello") <= string_view("z"), "");
-static_assert(string_view("hello") <= string_view("zabcdefghijklmno"), "");
-static_assert(string_view("hello") <= string_view("helz"), "");
-static_assert(string_view("hello") <= string_view("helzo"), "");
-static_assert(string_view("hello") <= string_view("helzobcdefgh"), "");
-static_assert(string_view("hello") <= string_view("helloa"), "");
-} // namespace test_less_or_equal_than
-
-namespace test_greater_than {
-static_assert(!(string_view("") > string_view("")), "");
-static_assert(!(string_view("a") > string_view("a")), "");
-static_assert(!(string_view("hello") > string_view("hello")), "");
-static_assert(string_view("hello") > string_view(""), "");
-static_assert(string_view("hello") > string_view("aello"), "");
-static_assert(string_view("hello") > string_view("a"), "");
-static_assert(string_view("hello") > string_view("abcdefghijklmno"), "");
-static_assert(string_view("hello") > string_view("hela"), "");
-static_assert(string_view("hello") > string_view("helao"), "");
-static_assert(string_view("hello") > string_view("helaobcdefgh"), "");
-static_assert(string_view("hello") > string_view("hell"), "");
-static_assert(!(string_view("") > string_view("hello")), "");
-static_assert(!(string_view("hello") > string_view("zello")), "");
-static_assert(!(string_view("hello") > string_view("z")), "");
-static_assert(!(string_view("hello") > string_view("zabcdefghijklmno")), "");
-static_assert(!(string_view("hello") > string_view("helz")), "");
-static_assert(!(string_view("hello") > string_view("helzo")), "");
-static_assert(!(string_view("hello") > string_view("helzobcdefgh")), "");
-static_assert(!(string_view("hello") > string_view("helloa")), "");
-} // namespace test_greater_than
-
-namespace test_greater_or_equals_than {
-static_assert(string_view("") >= string_view(""), "");
-static_assert(string_view("a") >= string_view("a"), "");
-static_assert(string_view("hello") >= string_view("hello"), "");
-static_assert(string_view("hello") >= string_view(""), "");
-static_assert(string_view("hello") >= string_view("aello"), "");
-static_assert(string_view("hello") >= string_view("a"), "");
-static_assert(string_view("hello") >= string_view("abcdefghijklmno"), "");
-static_assert(string_view("hello") >= string_view("hela"), "");
-static_assert(string_view("hello") >= string_view("helao"), "");
-static_assert(string_view("hello") >= string_view("helaobcdefgh"), "");
-static_assert(string_view("hello") >= string_view("hell"), "");
-static_assert(!(string_view("") >= string_view("hello")), "");
-static_assert(!(string_view("hello") >= string_view("zello")), "");
-static_assert(!(string_view("hello") >= string_view("z")), "");
-static_assert(!(string_view("hello") >= string_view("zabcdefghijklmno")), "");
-static_assert(!(string_view("hello") >= string_view("helz")), "");
-static_assert(!(string_view("hello") >= string_view("helzo")), "");
-static_assert(!(string_view("hello") >= string_view("helzobcdefgh")), "");
-static_assert(!(string_view("hello") >= string_view("helloa")), "");
-} // namespace test_greater_or_equals_than
-
 namespace test_starts_with {
 static_assert(string_view("hi").starts_with(string_view("hi")), "");
 static_assert(string_view("").starts_with(string_view("")), "");
@@ -650,1041 +82,5 @@ static_assert(!string_view("hello").ends_with('a'), "");
 static_assert(string_view("hello").ends_with('o'), "");
 } // namespace test_ends_with
 
-namespace test_find_overload1 {
-static_assert(0 == string_view("").find(string_view("")), "");
-static_assert(string_view::npos == string_view("").find(string_view("a")), "");
-static_assert(
-    string_view::npos == string_view("").find(string_view(""), 1),
-    "");
-static_assert(0 == string_view("abc").find(string_view("")), "");
-static_assert(2 == string_view("abc").find(string_view(""), 2), "");
-static_assert(0 == string_view("abc").find(string_view("a")), "");
-static_assert(0 == string_view("abc").find(string_view("ab")), "");
-static_assert(0 == string_view("abc").find(string_view("abc")), "");
-static_assert(1 == string_view("abc").find(string_view("bc")), "");
-static_assert(1 == string_view("abc").find(string_view("b")), "");
-static_assert(2 == string_view("abc").find(string_view("c")), "");
-static_assert(0 == string_view("abc").find(string_view("a")), "");
-static_assert(0 == string_view("abc").find(string_view("ab")), "");
-static_assert(0 == string_view("abc").find(string_view("abc")), "");
-static_assert(1 == string_view("ababa").find(string_view("ba")), "");
-static_assert(3 == string_view("ababa").find(string_view("ba"), 2), "");
-static_assert(3 == string_view("ababa").find(string_view("ba"), 3), "");
-static_assert(
-    string_view::npos == string_view("ababa").find(string_view("ba"), 4),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find(string_view("abcd")),
-    "");
-} // namespace test_find_overload1
-
-namespace test_find_overload2 {
-static_assert(string_view::npos == string_view("").find('a'), "");
-static_assert(0 == string_view("a").find('a'), "");
-static_assert(0 == string_view("abc").find('a'), "");
-static_assert(string_view::npos == string_view("a").find('a', 1), "");
-static_assert(1 == string_view("abc").find('b'), "");
-static_assert(1 == string_view("abc").find('b', 1), "");
-static_assert(string_view::npos == string_view("abc").find('b', 2), "");
-static_assert(2 == string_view("abc").find('c'), "");
-static_assert(2 == string_view("abc").find('c', 1), "");
-static_assert(2 == string_view("abc").find('c', 2), "");
-static_assert(string_view::npos == string_view("abc").find('c', 3), "");
-static_assert(string_view::npos == string_view("abc").find('a', 100), "");
-static_assert(string_view::npos == string_view("abc").find('z'), "");
-static_assert(0 == string_view("ababa").find('a'), "");
-static_assert(0 == string_view("ababa").find('a', 0), "");
-static_assert(2 == string_view("ababa").find('a', 1), "");
-static_assert(2 == string_view("ababa").find('a', 2), "");
-static_assert(4 == string_view("ababa").find('a', 3), "");
-static_assert(4 == string_view("ababa").find('a', 4), "");
-static_assert(string_view::npos == string_view("ababa").find('a', 5), "");
-} // namespace test_find_overload2
-
-namespace test_find_overload3 {
-static_assert(0 == string_view("").find("", 0, 0), "");
-static_assert(string_view::npos == string_view("").find("a", 0, 1), "");
-static_assert(string_view::npos == string_view("").find("", 1, 0), "");
-static_assert(0 == string_view("abc").find("", 0, 0), "");
-static_assert(2 == string_view("abc").find("", 2, 0), "");
-static_assert(0 == string_view("abc").find("a", 0, 1), "");
-static_assert(0 == string_view("abc").find("ab", 0, 2), "");
-static_assert(0 == string_view("abc").find("abc", 0, 3), "");
-static_assert(1 == string_view("abc").find("bc", 0, 2), "");
-static_assert(1 == string_view("abc").find("b", 0, 1), "");
-static_assert(2 == string_view("abc").find("c", 0, 1), "");
-static_assert(0 == string_view("abc").find("a", 0, 1), "");
-static_assert(0 == string_view("abc").find("ab", 0, 2), "");
-static_assert(0 == string_view("abc").find("abc", 0, 3), "");
-static_assert(1 == string_view("ababa").find("ba", 0, 2), "");
-static_assert(3 == string_view("ababa").find("ba", 2, 2), "");
-static_assert(3 == string_view("ababa").find("ba", 3, 2), "");
-static_assert(string_view::npos == string_view("ababa").find("ba", 4, 2), "");
-static_assert(string_view::npos == string_view("abc").find("abcd", 0, 4), "");
-} // namespace test_find_overload3
-
-namespace test_find_overload4 {
-static_assert(0 == string_view("").find(""), "");
-static_assert(string_view::npos == string_view("").find("a"), "");
-static_assert(string_view::npos == string_view("").find("", 1), "");
-static_assert(0 == string_view("abc").find(""), "");
-static_assert(2 == string_view("abc").find("", 2), "");
-static_assert(0 == string_view("abc").find("a"), "");
-static_assert(0 == string_view("abc").find("ab"), "");
-static_assert(0 == string_view("abc").find("abc"), "");
-static_assert(1 == string_view("abc").find("bc"), "");
-static_assert(1 == string_view("abc").find("b"), "");
-static_assert(2 == string_view("abc").find("c"), "");
-static_assert(0 == string_view("abc").find("a"), "");
-static_assert(0 == string_view("abc").find("ab"), "");
-static_assert(0 == string_view("abc").find("abc"), "");
-static_assert(1 == string_view("ababa").find("ba"), "");
-static_assert(3 == string_view("ababa").find("ba", 2), "");
-static_assert(3 == string_view("ababa").find("ba", 3), "");
-static_assert(string_view::npos == string_view("ababa").find("ba", 4), "");
-static_assert(string_view::npos == string_view("abc").find("abcd"), "");
-} // namespace test_find_overload4
-
-namespace test_rfind_overload1 {
-static_assert(0 == string_view("").rfind(string_view("")), "");
-static_assert(string_view::npos == string_view("").rfind(string_view("a")), "");
-static_assert(0 == string_view("").rfind(string_view(""), 1), "");
-static_assert(3 == string_view("abc").rfind(string_view("")), "");
-static_assert(0 == string_view("abc").rfind(string_view(""), 0), "");
-static_assert(0 == string_view("abc").rfind(string_view("a")), "");
-static_assert(0 == string_view("abc").rfind(string_view("ab")), "");
-static_assert(0 == string_view("abc").rfind(string_view("abc")), "");
-static_assert(1 == string_view("abc").rfind(string_view("bc")), "");
-static_assert(1 == string_view("abc").rfind(string_view("b")), "");
-static_assert(2 == string_view("abc").rfind(string_view("c")), "");
-static_assert(0 == string_view("abc").rfind(string_view("a")), "");
-static_assert(0 == string_view("abc").rfind(string_view("ab")), "");
-static_assert(0 == string_view("abc").rfind(string_view("abc")), "");
-static_assert(3 == string_view("ababa").rfind(string_view("ba")), "");
-static_assert(1 == string_view("ababa").rfind(string_view("ba"), 2), "");
-static_assert(1 == string_view("ababa").rfind(string_view("ba"), 1), "");
-static_assert(
-    string_view::npos == string_view("ababa").rfind(string_view("ba"), 0),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").rfind(string_view("abcd")),
-    "");
-} // namespace test_rfind_overload1
-
-namespace test_rfind_overload2 {
-static_assert(string_view::npos == string_view("").rfind('a'), "");
-static_assert(0 == string_view("a").rfind('a'), "");
-static_assert(0 == string_view("abc").rfind('a'), "");
-static_assert(0 == string_view("a").rfind('a', 0), "");
-static_assert(1 == string_view("abc").rfind('b'), "");
-static_assert(string_view::npos == string_view("abc").rfind('b', 0), "");
-static_assert(1 == string_view("abc").rfind('b', 1), "");
-static_assert(2 == string_view("abc").rfind('c'), "");
-static_assert(string_view::npos == string_view("abc").rfind('c', 0), "");
-static_assert(string_view::npos == string_view("abc").rfind('c', 1), "");
-static_assert(2 == string_view("abc").rfind('c', 2), "");
-static_assert(2 == string_view("abc").rfind('c', 3), "");
-static_assert(0 == string_view("abc").rfind('a', 100), "");
-static_assert(string_view::npos == string_view("abc").rfind('z'), "");
-static_assert(4 == string_view("ababa").rfind('a'), "");
-static_assert(0 == string_view("ababa").rfind('a', 0), "");
-static_assert(0 == string_view("ababa").rfind('a', 1), "");
-static_assert(2 == string_view("ababa").rfind('a', 2), "");
-static_assert(2 == string_view("ababa").rfind('a', 3), "");
-static_assert(4 == string_view("ababa").rfind('a', 4), "");
-static_assert(4 == string_view("ababa").rfind('a', 5), "");
-} // namespace test_rfind_overload2
-
-namespace test_rfind_overload3 {
-static_assert(0 == string_view("").rfind("", string_view::npos, 0), "");
-static_assert(
-    string_view::npos == string_view("").rfind("a", string_view::npos, 1),
-    "");
-static_assert(0 == string_view("").rfind("", 1, 0), "");
-static_assert(3 == string_view("abc").rfind("", string_view::npos, 0), "");
-static_assert(0 == string_view("abc").rfind("", 0, 0), "");
-static_assert(0 == string_view("abc").rfind("a", string_view::npos, 1), "");
-static_assert(0 == string_view("abc").rfind("ab", string_view::npos, 2), "");
-static_assert(0 == string_view("abc").rfind("abc", string_view::npos, 3), "");
-static_assert(1 == string_view("abc").rfind("bc", string_view::npos, 2), "");
-static_assert(1 == string_view("abc").rfind("b", string_view::npos, 1), "");
-static_assert(2 == string_view("abc").rfind("c", string_view::npos, 1), "");
-static_assert(0 == string_view("abc").rfind("a", string_view::npos, 1), "");
-static_assert(0 == string_view("abc").rfind("ab", string_view::npos, 2), "");
-static_assert(0 == string_view("abc").rfind("abc", string_view::npos, 3), "");
-static_assert(3 == string_view("ababa").rfind("ba", string_view::npos, 2), "");
-static_assert(1 == string_view("ababa").rfind("ba", 2, 2), "");
-static_assert(1 == string_view("ababa").rfind("ba", 1, 2), "");
-static_assert(string_view::npos == string_view("ababa").rfind("ba", 0, 2), "");
-static_assert(
-    string_view::npos == string_view("abc").rfind("abcd", string_view::npos, 4),
-    "");
-} // namespace test_rfind_overload3
-
-namespace test_rfind_overload4 {
-static_assert(0 == string_view("").rfind(""), "");
-static_assert(string_view::npos == string_view("").rfind("a"), "");
-static_assert(0 == string_view("").rfind("", 1), "");
-static_assert(3 == string_view("abc").rfind(""), "");
-static_assert(0 == string_view("abc").rfind("", 0), "");
-static_assert(0 == string_view("abc").rfind("a"), "");
-static_assert(0 == string_view("abc").rfind("ab"), "");
-static_assert(0 == string_view("abc").rfind("abc"), "");
-static_assert(1 == string_view("abc").rfind("bc"), "");
-static_assert(1 == string_view("abc").rfind("b"), "");
-static_assert(2 == string_view("abc").rfind("c"), "");
-static_assert(0 == string_view("abc").rfind("a"), "");
-static_assert(0 == string_view("abc").rfind("ab"), "");
-static_assert(0 == string_view("abc").rfind("abc"), "");
-static_assert(3 == string_view("ababa").rfind("ba"), "");
-static_assert(1 == string_view("ababa").rfind("ba", 2), "");
-static_assert(1 == string_view("ababa").rfind("ba", 1), "");
-static_assert(string_view::npos == string_view("ababa").rfind("ba", 0), "");
-static_assert(string_view::npos == string_view("abc").rfind("abcd"), "");
-} // namespace test_rfind_overload4
-
-namespace test_find_first_of_overload1 {
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view("a")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of(string_view("d")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of(string_view("def")),
-    "");
-
-static_assert(0 == string_view("abcabc").find_first_of(string_view("a")), "");
-static_assert(1 == string_view("abcabc").find_first_of(string_view("b")), "");
-static_assert(2 == string_view("abcabc").find_first_of(string_view("c")), "");
-static_assert(1 == string_view("abcabc").find_first_of(string_view("bc")), "");
-static_assert(1 == string_view("abcabc").find_first_of(string_view("cbd")), "");
-
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view("a"), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of(string_view("abc"), 100),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of(string_view("d"), 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_of(string_view("def"), 2),
-    "");
-
-static_assert(
-    3 == string_view("abcabc").find_first_of(string_view("a"), 1),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_of(string_view("b"), 3),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_first_of(string_view("c"), 5),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_of(string_view("bc"), 3),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_of(string_view("cbd"), 4),
-    "");
-} // namespace test_find_first_of_overload1
-
-namespace test_find_first_of_overload2 {
-static_assert(string_view::npos == string_view("").find_first_of('a'), "");
-static_assert(0 == string_view("a").find_first_of('a'), "");
-static_assert(0 == string_view("abc").find_first_of('a'), "");
-static_assert(string_view::npos == string_view("a").find_first_of('a', 1), "");
-static_assert(1 == string_view("abc").find_first_of('b'), "");
-static_assert(1 == string_view("abc").find_first_of('b', 1), "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of('b', 2),
-    "");
-static_assert(2 == string_view("abc").find_first_of('c'), "");
-static_assert(2 == string_view("abc").find_first_of('c', 1), "");
-static_assert(2 == string_view("abc").find_first_of('c', 2), "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of('c', 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of('a', 100),
-    "");
-static_assert(string_view::npos == string_view("abc").find_first_of('z'), "");
-static_assert(0 == string_view("ababa").find_first_of('a'), "");
-static_assert(0 == string_view("ababa").find_first_of('a', 0), "");
-static_assert(2 == string_view("ababa").find_first_of('a', 1), "");
-static_assert(2 == string_view("ababa").find_first_of('a', 2), "");
-static_assert(4 == string_view("ababa").find_first_of('a', 3), "");
-static_assert(4 == string_view("ababa").find_first_of('a', 4), "");
-static_assert(
-    string_view::npos == string_view("ababa").find_first_of('a', 5),
-    "");
-} // namespace test_find_first_of_overload2
-
-namespace test_find_first_of_overload3 {
-static_assert(
-    string_view::npos == string_view("").find_first_of("ab", 0, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of("abc", 0, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of("abcdef", 0, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("abcdef", 0, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("defa", 0, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("defabc", 0, 3),
-    "");
-
-static_assert(0 == string_view("abcabc").find_first_of("abc", 0, 1), "");
-static_assert(1 == string_view("abcabc").find_first_of("bac", 0, 1), "");
-static_assert(2 == string_view("abcabc").find_first_of("cab", 0, 1), "");
-static_assert(1 == string_view("abcabc").find_first_of("bccda", 0, 2), "");
-static_assert(1 == string_view("abcabc").find_first_of("cbdab", 0, 3), "");
-
-static_assert(
-    string_view::npos == string_view("").find_first_of("ab", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of("abc", 1, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_of("abcdef", 100, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("abcdef", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("defa", 3, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("defabc", 2, 3),
-    "");
-
-static_assert(3 == string_view("abcabc").find_first_of("abc", 1, 1), "");
-static_assert(4 == string_view("abcabc").find_first_of("bac", 3, 1), "");
-static_assert(5 == string_view("abcabc").find_first_of("cab", 5, 1), "");
-static_assert(4 == string_view("abcabc").find_first_of("bccda", 3, 2), "");
-static_assert(4 == string_view("abcabc").find_first_of("cbdab", 4, 3), "");
-} // namespace test_find_first_of_overload3
-
-namespace test_find_first_of_overload4 {
-static_assert(string_view::npos == string_view("").find_first_of(""), "");
-static_assert(string_view::npos == string_view("").find_first_of("a"), "");
-static_assert(string_view::npos == string_view("").find_first_of("abc"), "");
-static_assert(string_view::npos == string_view("abc").find_first_of(""), "");
-static_assert(string_view::npos == string_view("abc").find_first_of("d"), "");
-static_assert(string_view::npos == string_view("abc").find_first_of("def"), "");
-
-static_assert(0 == string_view("abcabc").find_first_of("a"), "");
-static_assert(1 == string_view("abcabc").find_first_of("b"), "");
-static_assert(2 == string_view("abcabc").find_first_of("c"), "");
-static_assert(1 == string_view("abcabc").find_first_of("bc"), "");
-static_assert(1 == string_view("abcabc").find_first_of("cbd"), "");
-
-static_assert(string_view::npos == string_view("").find_first_of("", 1), "");
-static_assert(string_view::npos == string_view("").find_first_of("a", 1), "");
-static_assert(
-    string_view::npos == string_view("").find_first_of("abc", 100),
-    "");
-static_assert(string_view::npos == string_view("abc").find_first_of("", 1), "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("d", 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_of("def", 2),
-    "");
-
-static_assert(3 == string_view("abcabc").find_first_of("a", 1), "");
-static_assert(4 == string_view("abcabc").find_first_of("b", 3), "");
-static_assert(5 == string_view("abcabc").find_first_of("c", 5), "");
-static_assert(4 == string_view("abcabc").find_first_of("bc", 3), "");
-static_assert(4 == string_view("abcabc").find_first_of("cbd", 4), "");
-} // namespace test_find_first_of_overload4
-
-namespace test_find_last_of_overload1 {
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view("a")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view("d")),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view("def")),
-    "");
-
-static_assert(3 == string_view("abcabc").find_last_of(string_view("a")), "");
-static_assert(4 == string_view("abcabc").find_last_of(string_view("b")), "");
-static_assert(5 == string_view("abcabc").find_last_of(string_view("c")), "");
-static_assert(5 == string_view("abcabc").find_last_of(string_view("bc")), "");
-static_assert(5 == string_view("abcabc").find_last_of(string_view("cbd")), "");
-
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view("a"), 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of(string_view("abc"), 100),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view("d"), 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of(string_view("def"), 2),
-    "");
-
-static_assert(0 == string_view("abcabc").find_last_of(string_view("a"), 2), "");
-static_assert(1 == string_view("abcabc").find_last_of(string_view("b"), 3), "");
-static_assert(2 == string_view("abcabc").find_last_of(string_view("c"), 2), "");
-static_assert(
-    2 == string_view("abcabc").find_last_of(string_view("bc"), 3),
-    "");
-static_assert(
-    2 == string_view("abcabc").find_last_of(string_view("cbd"), 2),
-    "");
-} // namespace test_find_last_of_overload1
-
-namespace test_find_last_of_overload2 {
-static_assert(string_view::npos == string_view("").find_last_of('a'), "");
-static_assert(0 == string_view("a").find_last_of('a'), "");
-static_assert(0 == string_view("abc").find_last_of('a'), "");
-static_assert(0 == string_view("a").find_last_of('a', 0), "");
-static_assert(1 == string_view("abc").find_last_of('b'), "");
-static_assert(string_view::npos == string_view("abc").find_last_of('b', 0), "");
-static_assert(1 == string_view("abc").find_last_of('b', 1), "");
-static_assert(2 == string_view("abc").find_last_of('c'), "");
-static_assert(string_view::npos == string_view("abc").find_last_of('c', 0), "");
-static_assert(string_view::npos == string_view("abc").find_last_of('c', 1), "");
-static_assert(2 == string_view("abc").find_last_of('c', 2), "");
-static_assert(2 == string_view("abc").find_last_of('c', 3), "");
-static_assert(0 == string_view("abc").find_last_of('a', 100), "");
-static_assert(string_view::npos == string_view("abc").find_last_of('z'), "");
-static_assert(4 == string_view("ababa").find_last_of('a'), "");
-static_assert(0 == string_view("ababa").find_last_of('a', 0), "");
-static_assert(0 == string_view("ababa").find_last_of('a', 1), "");
-static_assert(2 == string_view("ababa").find_last_of('a', 2), "");
-static_assert(2 == string_view("ababa").find_last_of('a', 3), "");
-static_assert(4 == string_view("ababa").find_last_of('a', 4), "");
-static_assert(4 == string_view("ababa").find_last_of('a', 5), "");
-} // namespace test_find_last_of_overload2
-
-namespace test_find_last_of_overload3 {
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_of("ab", string_view::npos, 0),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_of("abc", string_view::npos, 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_of("abcdef", string_view::npos, 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_of("abcdef", string_view::npos, 0),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_of("defa", string_view::npos, 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_of("defcba", string_view::npos, 3),
-    "");
-
-static_assert(
-    3 == string_view("abcabc").find_last_of("abc", string_view::npos, 1),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_of("bca", string_view::npos, 1),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_last_of("cab", string_view::npos, 1),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_last_of("bcab", string_view::npos, 2),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_last_of("cbdac", string_view::npos, 3),
-    "");
-
-static_assert(
-    string_view::npos == string_view("").find_last_of("ab", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of("abc", 0, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_of("abcdef", 100, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of("abcdef", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of("defa", 3, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of("defcba", 2, 3),
-    "");
-
-static_assert(0 == string_view("abcabc").find_last_of("abc", 2, 1), "");
-static_assert(1 == string_view("abcabc").find_last_of("bca", 3, 1), "");
-static_assert(2 == string_view("abcabc").find_last_of("cab", 2, 1), "");
-static_assert(2 == string_view("abcabc").find_last_of("bcab", 3, 2), "");
-static_assert(2 == string_view("abcabc").find_last_of("cbdac", 2, 2), "");
-} // namespace test_find_last_of_overload3
-
-namespace test_find_last_of_overload4 {
-static_assert(string_view::npos == string_view("").find_last_of(""), "");
-static_assert(string_view::npos == string_view("").find_last_of("a"), "");
-static_assert(string_view::npos == string_view("").find_last_of("abc"), "");
-static_assert(string_view::npos == string_view("abc").find_last_of(""), "");
-static_assert(string_view::npos == string_view("abc").find_last_of("d"), "");
-static_assert(string_view::npos == string_view("abc").find_last_of("def"), "");
-
-static_assert(3 == string_view("abcabc").find_last_of("a"), "");
-static_assert(4 == string_view("abcabc").find_last_of("b"), "");
-static_assert(5 == string_view("abcabc").find_last_of("c"), "");
-static_assert(5 == string_view("abcabc").find_last_of("bc"), "");
-static_assert(5 == string_view("abcabc").find_last_of("cbd"), "");
-
-static_assert(string_view::npos == string_view("").find_last_of("", 1), "");
-static_assert(string_view::npos == string_view("").find_last_of("a", 0), "");
-static_assert(
-    string_view::npos == string_view("").find_last_of("abc", 100),
-    "");
-static_assert(string_view::npos == string_view("abc").find_last_of("", 1), "");
-static_assert(string_view::npos == string_view("abc").find_last_of("d", 3), "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_of("def", 2),
-    "");
-
-static_assert(0 == string_view("abcabc").find_last_of("a", 2), "");
-static_assert(1 == string_view("abcabc").find_last_of("b", 3), "");
-static_assert(2 == string_view("abcabc").find_last_of("c", 2), "");
-static_assert(2 == string_view("abcabc").find_last_of("bc", 3), "");
-static_assert(2 == string_view("abcabc").find_last_of("cbd", 2), "");
-} // namespace test_find_last_of_overload4
-
-namespace test_find_first_not_of_overload1 {
-static_assert(
-    string_view::npos == string_view("").find_first_not_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of(string_view("a")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("acdb")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("defabc")),
-    "");
-
-static_assert(
-    0 == string_view("abcabc").find_first_not_of(string_view("")),
-    "");
-static_assert(
-    0 == string_view("abcabc").find_first_not_of(string_view("bc")),
-    "");
-static_assert(
-    1 == string_view("abcabc").find_first_not_of(string_view("ac")),
-    "");
-static_assert(
-    2 == string_view("abcabc").find_first_not_of(string_view("ab")),
-    "");
-static_assert(
-    1 == string_view("abcabc").find_first_not_of(string_view("a")),
-    "");
-static_assert(
-    1 == string_view("abcabc").find_first_not_of(string_view("da")),
-    "");
-
-static_assert(
-    string_view::npos == string_view("").find_first_not_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of(string_view("a"), 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_first_not_of(string_view("abc"), 100),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("abc"), 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("acdb"), 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_first_not_of(string_view("defabc"), 2),
-    "");
-
-static_assert(
-    1 == string_view("abcabc").find_first_not_of(string_view(""), 1),
-    "");
-static_assert(
-    3 == string_view("abcabc").find_first_not_of(string_view("bc"), 1),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_not_of(string_view("ac"), 4),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_first_not_of(string_view("ab"), 5),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_not_of(string_view("a"), 3),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_first_not_of(string_view("da"), 4),
-    "");
-} // namespace test_find_first_not_of_overload1
-
-namespace test_find_first_not_of_overload2 {
-static_assert(string_view::npos == string_view("").find_first_not_of('a'), "");
-static_assert(string_view::npos == string_view("a").find_first_not_of('a'), "");
-static_assert(1 == string_view("abc").find_first_not_of('a'), "");
-static_assert(
-    string_view::npos == string_view("a").find_first_not_of('a', 1),
-    "");
-static_assert(0 == string_view("abc").find_first_not_of('b'), "");
-static_assert(2 == string_view("abc").find_first_not_of('b', 1), "");
-static_assert(2 == string_view("abc").find_first_not_of('b', 2), "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of('b', 3),
-    "");
-static_assert(0 == string_view("abc").find_first_not_of('c'), "");
-static_assert(1 == string_view("abc").find_first_not_of('c', 1), "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of('c', 2),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of('c', 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of('a', 100),
-    "");
-static_assert(1 == string_view("ababa").find_first_not_of('a'), "");
-static_assert(1 == string_view("ababa").find_first_not_of('a', 0), "");
-static_assert(1 == string_view("ababa").find_first_not_of('a', 1), "");
-static_assert(3 == string_view("ababa").find_first_not_of('a', 2), "");
-static_assert(3 == string_view("ababa").find_first_not_of('a', 3), "");
-static_assert(
-    string_view::npos == string_view("ababa").find_first_not_of('a', 4),
-    "");
-static_assert(
-    string_view::npos == string_view("ababa").find_first_not_of('a', 5),
-    "");
-} // namespace test_find_first_not_of_overload2
-
-namespace test_find_first_not_of_overload3 {
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("ab", 0, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abc", 0, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abcdef", 0, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("abcdef", 0, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("acdbef", 0, 4),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("defabcas", 0, 6),
-    "");
-
-static_assert(0 == string_view("abcabc").find_first_not_of("abc", 0, 0), "");
-static_assert(0 == string_view("abcabc").find_first_not_of("bca", 0, 2), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("acb", 0, 2), "");
-static_assert(2 == string_view("abcabc").find_first_not_of("abc", 0, 2), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("abac", 0, 1), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("dadab", 0, 2), "");
-
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("ab", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abc", 1, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abcdef", 100, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("abcdef", 1, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("acdbef", 3, 4),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("defabcas", 2, 6),
-    "");
-
-static_assert(1 == string_view("abcabc").find_first_not_of("bca", 1, 0), "");
-static_assert(3 == string_view("abcabc").find_first_not_of("bca", 1, 2), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("acb", 4, 2), "");
-static_assert(5 == string_view("abcabc").find_first_not_of("abc", 5, 2), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("abac", 3, 1), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("dadab", 4, 2), "");
-} // namespace test_find_first_not_of_overload3
-
-namespace test_find_first_not_of_overload4 {
-static_assert(string_view::npos == string_view("").find_first_not_of(""), "");
-static_assert(string_view::npos == string_view("").find_first_not_of("a"), "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abc"),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("abc"),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("acdb"),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("defabc"),
-    "");
-
-static_assert(0 == string_view("abcabc").find_first_not_of(""), "");
-static_assert(0 == string_view("abcabc").find_first_not_of("bc"), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("ac"), "");
-static_assert(2 == string_view("abcabc").find_first_not_of("ab"), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("a"), "");
-static_assert(1 == string_view("abcabc").find_first_not_of("da"), "");
-
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("", 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("a", 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_first_not_of("abc", 100),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("abc", 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("acdb", 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_first_not_of("defabc", 2),
-    "");
-
-static_assert(1 == string_view("abcabc").find_first_not_of("", 1), "");
-static_assert(3 == string_view("abcabc").find_first_not_of("bc", 1), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("ac", 4), "");
-static_assert(5 == string_view("abcabc").find_first_not_of("ab", 5), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("a", 3), "");
-static_assert(4 == string_view("abcabc").find_first_not_of("da", 4), "");
-} // namespace test_find_first_not_of_overload4
-
-namespace test_find_last_not_of_overload1 {
-static_assert(
-    string_view::npos == string_view("").find_last_not_of(string_view("")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of(string_view("a")),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("abc")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("acdb")),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("defabc")),
-    "");
-
-static_assert(5 == string_view("abcabc").find_last_not_of(string_view("")), "");
-static_assert(
-    3 == string_view("abcabc").find_last_not_of(string_view("bc")),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of(string_view("ac")),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_last_not_of(string_view("ab")),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of(string_view("c")),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of(string_view("ca")),
-    "");
-
-static_assert(
-    string_view::npos == string_view("").find_last_not_of(string_view(""), 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of(string_view("a"), 0),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_not_of(string_view("abc"), 100),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("abc"), 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("acdb"), 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of(string_view("defabc"), 2),
-    "");
-
-static_assert(
-    4 == string_view("abcabc").find_last_not_of(string_view(""), 4),
-    "");
-static_assert(
-    0 == string_view("abcabc").find_last_not_of(string_view("bc"), 2),
-    "");
-static_assert(
-    1 == string_view("abcabc").find_last_not_of(string_view("ac"), 2),
-    "");
-static_assert(
-    2 == string_view("abcabc").find_last_not_of(string_view("ab"), 2),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of(string_view("c"), 4),
-    "");
-static_assert(
-    1 == string_view("abcabc").find_last_not_of(string_view("ca"), 2),
-    "");
-} // namespace test_find_last_not_of_overload1
-
-namespace test_find_last_not_of_overload2 {
-static_assert(string_view::npos == string_view("").find_last_not_of('a'), "");
-static_assert(string_view::npos == string_view("a").find_last_not_of('a'), "");
-static_assert(2 == string_view("abc").find_last_not_of('a'), "");
-static_assert(1 == string_view("abc").find_last_not_of('c'), "");
-static_assert(
-    string_view::npos == string_view("a").find_last_not_of('a', 0),
-    "");
-static_assert(2 == string_view("abc").find_last_not_of('b'), "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of('a', 0),
-    "");
-static_assert(0 == string_view("abc").find_last_not_of('b', 1), "");
-static_assert(0 == string_view("abc").find_last_not_of('c', 0), "");
-static_assert(1 == string_view("abc").find_last_not_of('c', 1), "");
-static_assert(1 == string_view("abc").find_last_not_of('c', 2), "");
-static_assert(1 == string_view("abc").find_last_not_of('c', 3), "");
-static_assert(2 == string_view("abc").find_last_not_of('a', 100), "");
-static_assert(3 == string_view("ababa").find_last_not_of('a'), "");
-static_assert(
-    string_view::npos == string_view("ababa").find_last_not_of('a', 0),
-    "");
-static_assert(1 == string_view("ababa").find_last_not_of('a', 1), "");
-static_assert(1 == string_view("ababa").find_last_not_of('a', 2), "");
-static_assert(3 == string_view("ababa").find_last_not_of('a', 3), "");
-static_assert(3 == string_view("ababa").find_last_not_of('a', 4), "");
-static_assert(3 == string_view("ababa").find_last_not_of('a', 5), "");
-} // namespace test_find_last_not_of_overload2
-
-namespace test_find_last_not_of_overload3 {
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_not_of("ab", string_view::npos, 0),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_not_of("abc", string_view::npos, 1),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("").find_last_not_of("abcdef", string_view::npos, 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of("abcdef", string_view::npos, 3),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of("acdbef", string_view::npos, 4),
-    "");
-static_assert(
-    string_view::npos ==
-        string_view("abc").find_last_not_of("defabcas", string_view::npos, 6),
-    "");
-
-static_assert(
-    5 == string_view("abcabc").find_last_not_of("cab", string_view::npos, 0),
-    "");
-static_assert(
-    3 == string_view("abcabc").find_last_not_of("bca", string_view::npos, 2),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of("acb", string_view::npos, 2),
-    "");
-static_assert(
-    5 == string_view("abcabc").find_last_not_of("abc", string_view::npos, 2),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of("caba", string_view::npos, 1),
-    "");
-static_assert(
-    4 == string_view("abcabc").find_last_not_of("cacab", string_view::npos, 2),
-    "");
-
-static_assert(
-    string_view::npos == string_view("").find_last_not_of("ab", 1, 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of("abc", 0, 1),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of("abcdef", 100, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("abcdef", 1, 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("acdbef", 3, 4),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("defabcas", 2, 6),
-    "");
-
-static_assert(4 == string_view("abcabc").find_last_not_of("bca", 4, 0), "");
-static_assert(0 == string_view("abcabc").find_last_not_of("bca", 2, 2), "");
-static_assert(1 == string_view("abcabc").find_last_not_of("acb", 2, 2), "");
-static_assert(2 == string_view("abcabc").find_last_not_of("abc", 2, 2), "");
-static_assert(4 == string_view("abcabc").find_last_not_of("caba", 4, 1), "");
-static_assert(1 == string_view("abcabc").find_last_not_of("cacab", 2, 2), "");
-} // namespace test_find_last_not_of_overload3
-
-namespace test_find_last_not_of_overload4 {
-static_assert(string_view::npos == string_view("").find_last_not_of(""), "");
-static_assert(string_view::npos == string_view("").find_last_not_of("a"), "");
-static_assert(string_view::npos == string_view("").find_last_not_of("abc"), "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("abc"),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("acdb"),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("defabc"),
-    "");
-
-static_assert(5 == string_view("abcabc").find_last_not_of(""), "");
-static_assert(3 == string_view("abcabc").find_last_not_of("bc"), "");
-static_assert(4 == string_view("abcabc").find_last_not_of("ac"), "");
-static_assert(5 == string_view("abcabc").find_last_not_of("ab"), "");
-static_assert(4 == string_view("abcabc").find_last_not_of("c"), "");
-static_assert(4 == string_view("abcabc").find_last_not_of("ca"), "");
-
-static_assert(string_view::npos == string_view("").find_last_not_of("", 1), "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of("a", 0),
-    "");
-static_assert(
-    string_view::npos == string_view("").find_last_not_of("abc", 100),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("abc", 1),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("acdb", 3),
-    "");
-static_assert(
-    string_view::npos == string_view("abc").find_last_not_of("defabc", 2),
-    "");
-
-static_assert(4 == string_view("abcabc").find_last_not_of("", 4), "");
-static_assert(0 == string_view("abcabc").find_last_not_of("bc", 2), "");
-static_assert(1 == string_view("abcabc").find_last_not_of("ac", 2), "");
-static_assert(2 == string_view("abcabc").find_last_not_of("ab", 2), "");
-static_assert(4 == string_view("abcabc").find_last_not_of("c", 4), "");
-static_assert(1 == string_view("abcabc").find_last_not_of("ca", 2), "");
-} // namespace test_find_last_not_of_overload4
-
-namespace test_output_operator {
-void testOutputIterator(const std::string& str) {
-  std::ostringstream stream;
-  stream << string_view(str);
-  std::string actual = stream.str();
-  EXPECT_EQ(str, actual);
-}
-
-TEST(StringViewTest, testOutputOperator) {
-  testOutputIterator("");
-  testOutputIterator("abc");
-}
-} // namespace test_output_operator
-
-namespace test_hash {
-TEST(StringViewTest, testHash) {
-  EXPECT_EQ(
-      std::hash<string_view>()(string_view()), std::hash<string_view>()(""));
-  EXPECT_EQ(
-      std::hash<string_view>()(string_view("hello")),
-      std::hash<string_view>()("hello"));
-  EXPECT_NE(
-      std::hash<string_view>()(string_view("hello")),
-      std::hash<string_view>()(""));
-}
-} // namespace test_hash
-
 } // namespace
 // NOLINTEND(modernize*, readability*, bugprone-string-constructor)
diff --git a/c10/test/util/typeid_test.cpp b/c10/test/util/typeid_test.cpp
index 8e78ec84e53..ac8eaabac90 100644
--- a/c10/test/util/typeid_test.cpp
+++ b/c10/test/util/typeid_test.cpp
@@ -33,7 +33,7 @@ TEST(TypeMetaTest, Names) {
   TypeMeta int_meta = TypeMeta::Make<int>();
   EXPECT_EQ("int", int_meta.name());
   TypeMeta string_meta = TypeMeta::Make<string>();
-  EXPECT_TRUE(c10::string_view::npos != string_meta.name().find("string"));
+  EXPECT_TRUE(std::string_view::npos != string_meta.name().find("string"));
 }
 
 TEST(TypeMetaTest, TypeMeta) {
@@ -66,8 +66,8 @@ TEST(TypeMetaTest, TypeMeta) {
   EXPECT_EQ(bar_meta.itemsize(), TypeMeta::ItemSize<TypeMetaTestBar>());
   EXPECT_EQ(int_meta.name(), "int");
   EXPECT_EQ(float_meta.name(), "float");
-  EXPECT_NE(foo_meta.name().find("TypeMetaTestFoo"), c10::string_view::npos);
-  EXPECT_NE(bar_meta.name().find("TypeMetaTestBar"), c10::string_view::npos);
+  EXPECT_NE(foo_meta.name().find("TypeMetaTestFoo"), std::string_view::npos);
+  EXPECT_NE(bar_meta.name().find("TypeMetaTestBar"), std::string_view::npos);
 }
 
 // NOLINTNEXTLINE(cppcoreguidelines-special-member-functions)
diff --git a/c10/util/typeid.h b/c10/util/typeid.h
index b36d2eaf67f..20959f64180 100644
--- a/c10/util/typeid.h
+++ b/c10/util/typeid.h
@@ -135,7 +135,7 @@ struct TypeMetaData final {
       PlacementDelete* placementDelete,
       Delete* deleteFn,
       TypeIdentifier id,
-      c10::string_view name) noexcept
+      std::string_view name) noexcept
       : itemsize_(itemsize),
         new_(newFn),
         placementNew_(placementNew),
@@ -152,7 +152,7 @@ struct TypeMetaData final {
   PlacementDelete* placementDelete_;
   Delete* delete_;
   TypeIdentifier id_;
-  c10::string_view name_;
+  std::string_view name_;
 };
 
 // Mechanism for throwing errors which can't be prevented at compile time
@@ -411,7 +411,7 @@ class C10_API TypeMeta final {
   /**
    * Returns a printable name for the type.
    */
-  c10::string_view name() const noexcept {
+  std::string_view name() const noexcept {
     return data().name_;
   }
 
@@ -430,7 +430,7 @@ class C10_API TypeMeta final {
   }
 
   template <class T>
-  static c10::string_view TypeName() noexcept {
+  static std::string_view TypeName() noexcept {
     return c10::util::get_fully_qualified_type_name<T>();
   }