return bytealg.IndexByteString(s, c)
}

func Index(s, substr string) int {
	n := len(substr)
	switch {
	case n == 0:
		return 0
	case n == 1:
		return IndexByte(s, substr[0])
	case n == len(s):
		if substr == s {
			return 0
		}
		return -1
	case n > len(s):
		return -1
	case n <= bytealg.MaxLen:
		// Use brute force when s and substr both are small
		if len(s) <= bytealg.MaxBruteForce {

#define EXPECT_FATAL_FAILURE(statement, substr) \
  do { \
    class GTestExpectFatalFailureHelper {\
     public:\
      static void Execute() { statement; }\
    };\
    ::testing::TestPartResultArray gtest_failures;\
    ::testing::internal::SingleFailureChecker gtest_checker(\
        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
    {\

#define EXPECT_FATAL_FAILURE(statement, substr) \
  do { \
    class GTestExpectFatalFailureHelper {\
     public:\
      static void Execute() { statement; }\
    };\
    ::testing::TestPartResultArray gtest_failures;\
    ::testing::internal::SingleFailureChecker gtest_checker(\
        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
    {\

      "tensorflow/compiler/mlir/tf2xla/api/v2/testdata/");
}

size_t CountSubstring(absl::string_view str, absl::string_view substr) {
  size_t count = 0;
  size_t idx = str.find(substr);
  while (idx != std::string::npos) {
    count++;
    idx = str.find(substr, idx + 1);
  }
  return count;
}

class TensorflowDialectToExecutorTest : public ::testing::Test {
 public:

func parseTag(tag string) (string, tagOptions) {
	tag, opt, _ := strings.Cut(tag, ",")
	return tag, tagOptions(opt)
}

// Contains reports whether a comma-separated list of options
// contains a particular substr flag. substr must be surrounded by a
// string boundary or commas.
func (o tagOptions) Contains(optionName string) bool {
	if len(o) == 0 {
		return false
	}
	s := string(o)
	for s != "" {
		var name string

			}
		}
	}
}

func matchGroupIndexValue(value string, idx int) lineFunc {
	var leadColon string
	if idx > 0 {
		leadColon = ":"
	}
	substr := []byte(leadColon + value + ":")
	return func(line []byte) (v any, err error) {
		if !bytes.Contains(line, substr) || bytes.Count(line, colon) < 3 {
			return
		}
		// wheel:*:0:root
		parts := strings.SplitN(string(line), ":", 4)

            if (absl::StartsWith(note_str, kErrorCodePrefix)) {
              error_code = note_str.substr(sizeof(kErrorCodePrefix) - 1);
            }

            error_message += "\n";
            if (note_str.size() <= kMaxAcceptedNoteSize) {
              error_message += note_str;
            } else {
              error_message += note_str.substr(0, kMaxAcceptedNoteSize);
              error_message += "...";
            }
          }

    function getCurrentChapterFileName(givenUrl) {
        var currentChapterFileName = givenUrl.substr(givenUrl.lastIndexOf("/") + 1);
        if (currentChapterFileName === "index.html" || currentChapterFileName === "") {
            currentChapterFileName = givenUrl.substr(0, givenUrl.lastIndexOf("/"));
            currentChapterFileName = currentChapterFileName.substr(currentChapterFileName.lastIndexOf("/") + 1) + "/index.html";
        }

    value_string = "<error computing value>";
  }
  if (value_string.length() > 100) {
    // The default NumPy-style output can be distractingly long in error
    // messages.
    value_string = absl::StrCat(value_string.substr(0, 100), " [...]");
  }
  Status s;
  const char* device_name = DeviceName(&s);
  if (!s.ok()) {
    device_name = "<error fetching device name>";
  }

		").noteClientGone(":     "a closenotifier sender",
	}
	var stacks string
	for i := 0; i < 2500; i++ {
		bad = ""
		stacks = strings.Join(interestingGoroutines(), "\n\n")
		for substr, what := range badSubstring {
			if strings.Contains(stacks, substr) {
				bad = what
			}
		}
		if bad == "" {
			leakReported = false
			return
		}
		// Bad stuff found, but goroutines might just still be