text: 
  #include <cstdarg>
  #include <cstdint>
  #include <cstdio>
  #include <string>
  
  #include "gmock/gmock.h"
  #include "gtest/gtest.h"
  #include "absl/strings/str_format.h"
  #include "absl/strings/string_view.h"
  
  namespace absl {
  namespace {
  using str_format_internal::FormatArgImpl;
  
  class FormatEntryPointTest : public ::testing::Test { };
  
  TEST_F(FormatEntryPointTest, Format) {
    std::string sink;
    EXPECT_TRUE(Format(&sink, "A format %d", 123));
    EXPECT_EQ("A format 123", sink);
    sink.clear();
  
    ParsedFormat<'d'> pc("A format %d");
    EXPECT_TRUE(Format(&sink, pc, 123));
    EXPECT_EQ("A format 123", sink);
  }
  TEST_F(FormatEntryPointTest, UntypedFormat) {
    constexpr const char* formats[] = {
      "",
      "a",
      "%80d",
  #if !defined(_MSC_VER) && !defined(__ANDROID__)
      // MSVC and Android don't support positional syntax.
      "complicated multipart %% %1$d format %1$0999d",
  #endif  // _MSC_VER
    };
    for (const char* fmt : formats) {
      std::string actual;
      int i = 123;
      FormatArgImpl arg_123(i);
      absl::Span<const FormatArgImpl> args(&arg_123, 1);
      UntypedFormatSpec format(fmt);
  
      EXPECT_TRUE(FormatUntyped(&actual, format, args));
      char buf[4096]{};
      snprintf(buf, sizeof(buf), fmt, 123);
      EXPECT_EQ(
          str_format_internal::FormatPack(
              str_format_internal::UntypedFormatSpecImpl::Extract(format), args),
          buf);
      EXPECT_EQ(actual, buf);
    }
    // The internal version works with a preparsed format.
    ParsedFormat<'d'> pc("A format %d");
    int i = 345;
    FormatArg arg(i);
    std::string out;
    EXPECT_TRUE(str_format_internal::FormatUntyped(
        &out, str_format_internal::UntypedFormatSpecImpl(&pc), {&arg, 1}));
    EXPECT_EQ("A format 345", out);
  }
  
  TEST_F(FormatEntryPointTest, StringFormat) {
    EXPECT_EQ("123", StrFormat("%d", 123));
    constexpr absl::string_view view("=%d=", 4);
    EXPECT_EQ("=123=", StrFormat(view, 123));
  }
  
  TEST_F(FormatEntryPointTest, AppendFormat) {
    std::string s;
    std::string& r = StrAppendFormat(&s, "%d", 123);
    EXPECT_EQ(&s, &r);  // should be same object
    EXPECT_EQ("123", r);
  }
  
  TEST_F(FormatEntryPointTest, AppendFormatFail) {
    std::string s = "orig";
  
    UntypedFormatSpec format(" more %d");
    FormatArgImpl arg("not an int");
  
    EXPECT_EQ("orig",
              str_format_internal::AppendPack(
                  &s, str_format_internal::UntypedFormatSpecImpl::Extract(format),
                  {&arg, 1}));
  }
  
  
  TEST_F(FormatEntryPointTest, ManyArgs) {
    EXPECT_EQ("24", StrFormat("%24$d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
                              14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24));
    EXPECT_EQ("60", StrFormat("%60$d", 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
                              14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
                              27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
                              40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,
                              53, 54, 55, 56, 57, 58, 59, 60));
  }
  
  TEST_F(FormatEntryPointTest, Preparsed) {
    ParsedFormat<'d'> pc("%d");
    EXPECT_EQ("123", StrFormat(pc, 123));
    // rvalue ok?
    EXPECT_EQ("123", StrFormat(ParsedFormat<'d'>("%d"), 123));
    constexpr absl::string_view view("=%d=", 4);
    EXPECT_EQ("=123=", StrFormat(ParsedFormat<'d'>(view), 123));
  }
  
  TEST_F(FormatEntryPointTest, FormatCountCapture) {
    int n = 0;
    EXPECT_EQ("", StrFormat("%n", FormatCountCapture(&n)));
    EXPECT_EQ(0, n);
    EXPECT_EQ("123", StrFormat("%d%n", 123, FormatCountCapture(&n)));
    EXPECT_EQ(3, n);
  }
  
  TEST_F(FormatEntryPointTest, FormatCountCaptureWrongType) {
    // Should reject int*.
    int n = 0;
    UntypedFormatSpec format("%d%n");
    int i = 123, *ip = &n;
    FormatArgImpl args[2] = {FormatArgImpl(i), FormatArgImpl(ip)};
  
    EXPECT_EQ("", str_format_internal::FormatPack(
                      str_format_internal::UntypedFormatSpecImpl::Extract(format),
                      absl::MakeSpan(args)));
  }
  
  TEST_F(FormatEntryPointTest, FormatCountCaptureMultiple) {
    int n1 = 0;
    int n2 = 0;
    EXPECT_EQ("    1         2",
              StrFormat("%5d%n%10d%n", 1, FormatCountCapture(&n1), 2,
                        FormatCountCapture(&n2)));
    EXPECT_EQ(5, n1);
    EXPECT_EQ(15, n2);
  }
  
  TEST_F(FormatEntryPointTest, FormatCountCaptureExample) {
    int n;
    std::string s;
    StrAppendFormat(&s, "%s: %n%s\n", "(1,1)", FormatCountCapture(&n), "(1,2)");
    StrAppendFormat(&s, "%*s%s\n", n, "", "(2,2)");
    EXPECT_EQ(7, n);
    EXPECT_EQ(
        "(1,1): (1,2)\n"
        "       (2,2)\n",
        s);
  }
  
  TEST_F(FormatEntryPointTest, Stream) {
    const std::string formats[] = {
      "",
      "a",
      "%80d",
  #if !defined(_MSC_VER) && !defined(__ANDROID__)
      // MSVC doesn't support positional syntax.
      "complicated multipart %% %1$d format %1$080d",
  #endif  // _MSC_VER
    };
    std::string buf(4096, '\0');
    for (const auto& fmt : formats) {
      const auto parsed = ParsedFormat<'d'>::NewAllowIgnored(fmt);
      std::ostringstream oss;
      oss << StreamFormat(*parsed, 123);
      int fmt_result = snprintf(&*buf.begin(), buf.size(), fmt.c_str(), 123);
      ASSERT_TRUE(oss) << fmt;
      ASSERT_TRUE(fmt_result >= 0 && static_cast<size_t>(fmt_result) < buf.size())
          << fmt_result;
      EXPECT_EQ(buf.c_str(), oss.str());
    }
  }
  
  TEST_F(FormatEntryPointTest, StreamOk) {
    std::ostringstream oss;
    oss << StreamFormat("hello %d", 123);
    EXPECT_EQ("hello 123", oss.str());
    EXPECT_TRUE(oss.good());
  }
  
  TEST_F(FormatEntryPointTest, StreamFail) {
    std::ostringstream oss;
    UntypedFormatSpec format("hello %d");
    FormatArgImpl arg("non-numeric");
    oss << str_format_internal::Streamable(
        str_format_internal::UntypedFormatSpecImpl::Extract(format), {&arg, 1});
    EXPECT_EQ("hello ", oss.str());  // partial write
    EXPECT_TRUE(oss.fail());
  }
  
  std::string WithSnprintf(const char* fmt, ...) {
    std::string buf;
    buf.resize(128);
    va_list va;
    va_start(va, fmt);
    int r = vsnprintf(&*buf.begin(), buf.size(), fmt, va);
    va_end(va);
    EXPECT_GE(r, 0);
    EXPECT_LT(r, buf.size());
    buf.resize(r);
    return buf;
  }
  
  TEST_F(FormatEntryPointTest, FloatPrecisionArg) {
    // Test that positional parameters for width and precision
    // are indexed to precede the value.
    // Also sanity check the same formats against snprintf.
    EXPECT_EQ("0.1", StrFormat("%.1f", 0.1));
    EXPECT_EQ("0.1", WithSnprintf("%.1f", 0.1));
    EXPECT_EQ("  0.1", StrFormat("%*.1f", 5, 0.1));
    EXPECT_EQ("  0.1", WithSnprintf("%*.1f", 5, 0.1));
    EXPECT_EQ("0.1", StrFormat("%.*f", 1, 0.1));
    EXPECT_EQ("0.1", WithSnprintf("%.*f", 1, 0.1));
    EXPECT_EQ("  0.1", StrFormat("%*.*f", 5, 1, 0.1));
    EXPECT_EQ("  0.1", WithSnprintf("%*.*f", 5, 1, 0.1));
  }
  namespace streamed_test {
  struct X {};
  std::ostream& operator<<(std::ostream& os, const X&) {
    return os << "X";
  }
  }  // streamed_test
  
  TEST_F(FormatEntryPointTest, FormatStreamed) {
    EXPECT_EQ("123", StrFormat("%s", FormatStreamed(123)));
    EXPECT_EQ("  123", StrFormat("%5s", FormatStreamed(123)));
    EXPECT_EQ("123  ", StrFormat("%-5s", FormatStreamed(123)));
    EXPECT_EQ("X", StrFormat("%s", FormatStreamed(streamed_test::X())));
    EXPECT_EQ("123", StrFormat("%s", FormatStreamed(StreamFormat("%d", 123))));
  }
  
  // Helper class that creates a temporary file and exposes a FILE* to it.
  // It will close the file on destruction.
  class TempFile {
   public:
    TempFile() : file_(std::tmpfile()) {}
    ~TempFile() { std::fclose(file_); }
  
    std::FILE* file() const { return file_; }
  
    // Read the file into a std::string.
    std::string ReadFile() {
      std::fseek(file_, 0, SEEK_END);
      int size = std::ftell(file_);
      EXPECT_GT(size, 0);
      std::rewind(file_);
      std::string str(2 * size, ' ');
      int read_bytes = std::fread(&str[0], 1, str.size(), file_);
      EXPECT_EQ(read_bytes, size);
      str.resize(read_bytes);
      EXPECT_TRUE(std::feof(file_));
      return str;
    }
  
   private:
    std::FILE* file_;
  };
  
  TEST_F(FormatEntryPointTest, FPrintF) {
    TempFile tmp;
    int result =
        FPrintF(tmp.file(), "STRING: %s NUMBER: %010d", std::string("ABC"), -19);
    EXPECT_EQ(result, 30);
    EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
  }
  
  TEST_F(FormatEntryPointTest, FPrintFError) {
    errno = 0;
    int result = FPrintF(stdin, "ABC");
    EXPECT_LT(result, 0);
    EXPECT_EQ(errno, EBADF);
  }
  
  #if __GLIBC__
  TEST_F(FormatEntryPointTest, FprintfTooLarge) {
    std::FILE* f = std::fopen("/dev/null", "w");
    int width = 2000000000;
    errno = 0;
    int result = FPrintF(f, "%*d %*d", width, 0, width, 0);
    EXPECT_LT(result, 0);
    EXPECT_EQ(errno, EFBIG);
    std::fclose(f);
  }
  
  TEST_F(FormatEntryPointTest, PrintF) {
    int stdout_tmp = dup(STDOUT_FILENO);
  
    TempFile tmp;
    std::fflush(stdout);
    dup2(fileno(tmp.file()), STDOUT_FILENO);
  
    int result = PrintF("STRING: %s NUMBER: %010d", std::string("ABC"), -19);
  
    std::fflush(stdout);
    dup2(stdout_tmp, STDOUT_FILENO);
    close(stdout_tmp);
  
    EXPECT_EQ(result, 30);
    EXPECT_EQ(tmp.ReadFile(), "STRING: ABC NUMBER: -000000019");
  }
  #endif  // __GLIBC__
  
  TEST_F(FormatEntryPointTest, SNPrintF) {
    char buffer[16];
    int result =
        SNPrintF(buffer, sizeof(buffer), "STRING: %s", std::string("ABC"));
    EXPECT_EQ(result, 11);
    EXPECT_EQ(std::string(buffer), "STRING: ABC");
  
    result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 123456);
    EXPECT_EQ(result, 14);
    EXPECT_EQ(std::string(buffer), "NUMBER: 123456");
  
    result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 1234567);
    EXPECT_EQ(result, 15);
    EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
  
    result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 12345678);
    EXPECT_EQ(result, 16);
    EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
  
    result = SNPrintF(buffer, sizeof(buffer), "NUMBER: %d", 123456789);
    EXPECT_EQ(result, 17);
    EXPECT_EQ(std::string(buffer), "NUMBER: 1234567");
  
    result = SNPrintF(nullptr, 0, "Just checking the %s of the output.", "size");
    EXPECT_EQ(result, 37);
  }
  
  TEST(StrFormat, BehavesAsDocumented) {
    std::string s = absl::StrFormat("%s, %d!", "Hello", 123);
    EXPECT_EQ("Hello, 123!", s);
    // The format of a replacement is
    // '%'[position][flags][width['.'precision]][length_modifier][format]
    EXPECT_EQ(absl::StrFormat("%1$+3.2Lf", 1.1), "+1.10");
    // Text conversion:
    //     "c" - Character.              Eg: 'a' -> "A", 20 -> " "
    EXPECT_EQ(StrFormat("%c", 'a'), "a");
    EXPECT_EQ(StrFormat("%c", 0x20), " ");
    //           Formats char and integral types: int, long, uint64_t, etc.
    EXPECT_EQ(StrFormat("%c", int{'a'}), "a");
    EXPECT_EQ(StrFormat("%c", long{'a'}), "a");  // NOLINT
    EXPECT_EQ(StrFormat("%c", uint64_t{'a'}), "a");
    //     "s" - std::string       Eg: "C" -> "C", std::string("C++") -> "C++"
    //           Formats std::string, char*, string_view, and Cord.
    EXPECT_EQ(StrFormat("%s", "C"), "C");
    EXPECT_EQ(StrFormat("%s", std::string("C++")), "C++");
    EXPECT_EQ(StrFormat("%s", string_view("view")), "view");
    // Integral Conversion
    //     These format integral types: char, int, long, uint64_t, etc.
    EXPECT_EQ(StrFormat("%d", char{10}), "10");
    EXPECT_EQ(StrFormat("%d", int{10}), "10");
    EXPECT_EQ(StrFormat("%d", long{10}), "10");  // NOLINT
    EXPECT_EQ(StrFormat("%d", uint64_t{10}), "10");
    //     d,i - signed decimal          Eg: -10 -> "-10"
    EXPECT_EQ(StrFormat("%d", -10), "-10");
    EXPECT_EQ(StrFormat("%i", -10), "-10");
    //      o  - octal                   Eg:  10 -> "12"
    EXPECT_EQ(StrFormat("%o", 10), "12");
    //      u  - unsigned decimal        Eg:  10 -> "10"
    EXPECT_EQ(StrFormat("%u", 10), "10");
    //     x/X - lower,upper case hex    Eg:  10 -> "a"/"A"
    EXPECT_EQ(StrFormat("%x", 10), "a");
    EXPECT_EQ(StrFormat("%X", 10), "A");
    // Floating-point, with upper/lower-case output.
    //     These format floating points types: float, double, long double, etc.
    EXPECT_EQ(StrFormat("%.1f", float{1}), "1.0");
    EXPECT_EQ(StrFormat("%.1f", double{1}), "1.0");
    const long double long_double = 1.0;
    EXPECT_EQ(StrFormat("%.1f", long_double), "1.0");
    //     These also format integral types: char, int, long, uint64_t, etc.:
    EXPECT_EQ(StrFormat("%.1f", char{1}), "1.0");
    EXPECT_EQ(StrFormat("%.1f", int{1}), "1.0");
    EXPECT_EQ(StrFormat("%.1f", long{1}), "1.0");  // NOLINT
    EXPECT_EQ(StrFormat("%.1f", uint64_t{1}), "1.0");
    //     f/F - decimal.                Eg: 123456789 -> "123456789.000000"
    EXPECT_EQ(StrFormat("%f", 123456789), "123456789.000000");
    EXPECT_EQ(StrFormat("%F", 123456789), "123456789.000000");
    //     e/E - exponentiated           Eg: .01 -> "1.00000e-2"/"1.00000E-2"
    EXPECT_EQ(StrFormat("%e", .01), "1.000000e-02");
    EXPECT_EQ(StrFormat("%E", .01), "1.000000E-02");
    //     g/G - exponentiate to fit     Eg: .01 -> "0.01", 1e10 ->"1e+10"/"1E+10"
    EXPECT_EQ(StrFormat("%g", .01), "0.01");
    EXPECT_EQ(StrFormat("%g", 1e10), "1e+10");
    EXPECT_EQ(StrFormat("%G", 1e10), "1E+10");
    //     a/A - lower,upper case hex    Eg: -3.0 -> "-0x1.8p+1"/"-0X1.8P+1"
  
  // On Android platform <=21, there is a regression in hexfloat formatting.
  #if !defined(__ANDROID_API__) || __ANDROID_API__ > 21
    EXPECT_EQ(StrFormat("%.1a", -3.0), "-0x1.8p+1");  // .1 to fix MSVC output
    EXPECT_EQ(StrFormat("%.1A", -3.0), "-0X1.8P+1");  // .1 to fix MSVC output
  #endif
  
    // Other conversion
    int64_t value = 0x7ffdeb4;
    auto ptr_value = static_cast<uintptr_t>(value);
    const int& something = *reinterpret_cast<const int*>(ptr_value);
    EXPECT_EQ(StrFormat("%p", &something), StrFormat("0x%x", ptr_value));
  
    // Output widths are supported, with optional flags.
    EXPECT_EQ(StrFormat("%3d", 1), "  1");
    EXPECT_EQ(StrFormat("%3d", 123456), "123456");
    EXPECT_EQ(StrFormat("%06.2f", 1.234), "001.23");
    EXPECT_EQ(StrFormat("%+d", 1), "+1");
    EXPECT_EQ(StrFormat("% d", 1), " 1");
    EXPECT_EQ(StrFormat("%-4d", -1), "-1  ");
    EXPECT_EQ(StrFormat("%#o", 10), "012");
    EXPECT_EQ(StrFormat("%#x", 15), "0xf");
    EXPECT_EQ(StrFormat("%04d", 8), "0008");
    // Posix positional substitution.
    EXPECT_EQ(absl::StrFormat("%2$s, %3$s, %1$s!", "vici", "veni", "vidi"),
              "veni, vidi, vici!");
    // Length modifiers are ignored.
    EXPECT_EQ(StrFormat("%hhd", int{1}), "1");
    EXPECT_EQ(StrFormat("%hd", int{1}), "1");
    EXPECT_EQ(StrFormat("%ld", int{1}), "1");
    EXPECT_EQ(StrFormat("%lld", int{1}), "1");
    EXPECT_EQ(StrFormat("%Ld", int{1}), "1");
    EXPECT_EQ(StrFormat("%jd", int{1}), "1");
    EXPECT_EQ(StrFormat("%zd", int{1}), "1");
    EXPECT_EQ(StrFormat("%td", int{1}), "1");
    EXPECT_EQ(StrFormat("%qd", int{1}), "1");
  }
  
  using str_format_internal::ExtendedParsedFormat;
  using str_format_internal::ParsedFormatBase;
  
  struct SummarizeConsumer {
    std::string* out;
    explicit SummarizeConsumer(std::string* out) : out(out) {}
  
    bool Append(string_view s) {
      *out += "[" + std::string(s) + "]";
      return true;
    }
  
    bool ConvertOne(const str_format_internal::UnboundConversion& conv,
                    string_view s) {
      *out += "{";
      *out += std::string(s);
      *out += ":";
      *out += std::to_string(conv.arg_position) + "$";
      if (conv.width.is_from_arg()) {
        *out += std::to_string(conv.width.get_from_arg()) + "$*";
      }
      if (conv.precision.is_from_arg()) {
        *out += "." + std::to_string(conv.precision.get_from_arg()) + "$*";
      }
      *out += conv.conv.Char();
      *out += "}";
      return true;
    }
  };
  
  std::string SummarizeParsedFormat(const ParsedFormatBase& pc) {
    std::string out;
    if (!pc.ProcessFormat(SummarizeConsumer(&out))) out += "!";
    return out;
  }
  
  class ParsedFormatTest : public testing::Test {};
  
  TEST_F(ParsedFormatTest, SimpleChecked) {
    EXPECT_EQ("[ABC]{d:1$d}[DEF]",
              SummarizeParsedFormat(ParsedFormat<'d'>("ABC%dDEF")));
    EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}",
              SummarizeParsedFormat(ParsedFormat<'s', 'd', 'f'>("%sFFF%dZZZ%f")));
    EXPECT_EQ("{s:1$s}[ ]{.*d:3$.2$*d}",
              SummarizeParsedFormat(ParsedFormat<'s', '*', 'd'>("%s %.*d")));
  }
  
  TEST_F(ParsedFormatTest, SimpleUncheckedCorrect) {
    auto f = ParsedFormat<'d'>::New("ABC%dDEF");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]{d:1$d}[DEF]", SummarizeParsedFormat(*f));
  
    std::string format = "%sFFF%dZZZ%f";
    auto f2 = ParsedFormat<'s', 'd', 'f'>::New(format);
  
    ASSERT_TRUE(f2);
    EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
  
    f2 = ParsedFormat<'s', 'd', 'f'>::New("%s %d %f");
  
    ASSERT_TRUE(f2);
    EXPECT_EQ("{s:1$s}[ ]{d:2$d}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
  
    auto star = ParsedFormat<'*', 'd'>::New("%*d");
    ASSERT_TRUE(star);
    EXPECT_EQ("{*d:2$1$*d}", SummarizeParsedFormat(*star));
  
    auto dollar = ParsedFormat<'d', 's'>::New("%2$s %1$d");
    ASSERT_TRUE(dollar);
    EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}", SummarizeParsedFormat(*dollar));
    // with reuse
    dollar = ParsedFormat<'d', 's'>::New("%2$s %1$d %1$d");
    ASSERT_TRUE(dollar);
    EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}[ ]{1$d:1$d}",
              SummarizeParsedFormat(*dollar));
  }
  
  TEST_F(ParsedFormatTest, SimpleUncheckedIgnoredArgs) {
    EXPECT_FALSE((ParsedFormat<'d', 's'>::New("ABC")));
    EXPECT_FALSE((ParsedFormat<'d', 's'>::New("%dABC")));
    EXPECT_FALSE((ParsedFormat<'d', 's'>::New("ABC%2$s")));
    auto f = ParsedFormat<'d', 's'>::NewAllowIgnored("ABC");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
    f = ParsedFormat<'d', 's'>::NewAllowIgnored("%dABC");
    ASSERT_TRUE(f);
    EXPECT_EQ("{d:1$d}[ABC]", SummarizeParsedFormat(*f));
    f = ParsedFormat<'d', 's'>::NewAllowIgnored("ABC%2$s");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
  }
  
  TEST_F(ParsedFormatTest, SimpleUncheckedUnsupported) {
    EXPECT_FALSE(ParsedFormat<'d'>::New("%1$d %1$x"));
    EXPECT_FALSE(ParsedFormat<'x'>::New("%1$d %1$x"));
  }
  
  TEST_F(ParsedFormatTest, SimpleUncheckedIncorrect) {
    EXPECT_FALSE(ParsedFormat<'d'>::New(""));
  
    EXPECT_FALSE(ParsedFormat<'d'>::New("ABC%dDEF%d"));
  
    std::string format = "%sFFF%dZZZ%f";
    EXPECT_FALSE((ParsedFormat<'s', 'd', 'g'>::New(format)));
  }
  
  using str_format_internal::Conv;
  
  TEST_F(ParsedFormatTest, UncheckedCorrect) {
    auto f = ExtendedParsedFormat<Conv::d>::New("ABC%dDEF");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]{d:1$d}[DEF]", SummarizeParsedFormat(*f));
  
    std::string format = "%sFFF%dZZZ%f";
    auto f2 =
        ExtendedParsedFormat<Conv::string, Conv::d, Conv::floating>::New(format);
  
    ASSERT_TRUE(f2);
    EXPECT_EQ("{s:1$s}[FFF]{d:2$d}[ZZZ]{f:3$f}", SummarizeParsedFormat(*f2));
  
    f2 = ExtendedParsedFormat<Conv::string, Conv::d, Conv::floating>::New(
        "%s %d %f");
  
    ASSERT_TRUE(f2);
    EXPECT_EQ("{s:1$s}[ ]{d:2$d}[ ]{f:3$f}", SummarizeParsedFormat(*f2));
  
    auto star = ExtendedParsedFormat<Conv::star, Conv::d>::New("%*d");
    ASSERT_TRUE(star);
    EXPECT_EQ("{*d:2$1$*d}", SummarizeParsedFormat(*star));
  
    auto dollar = ExtendedParsedFormat<Conv::d, Conv::s>::New("%2$s %1$d");
    ASSERT_TRUE(dollar);
    EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}", SummarizeParsedFormat(*dollar));
    // with reuse
    dollar = ExtendedParsedFormat<Conv::d, Conv::s>::New("%2$s %1$d %1$d");
    ASSERT_TRUE(dollar);
    EXPECT_EQ("{2$s:2$s}[ ]{1$d:1$d}[ ]{1$d:1$d}",
              SummarizeParsedFormat(*dollar));
  }
  
  TEST_F(ParsedFormatTest, UncheckedIgnoredArgs) {
    EXPECT_FALSE((ExtendedParsedFormat<Conv::d, Conv::s>::New("ABC")));
    EXPECT_FALSE((ExtendedParsedFormat<Conv::d, Conv::s>::New("%dABC")));
    EXPECT_FALSE((ExtendedParsedFormat<Conv::d, Conv::s>::New("ABC%2$s")));
    auto f = ExtendedParsedFormat<Conv::d, Conv::s>::NewAllowIgnored("ABC");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]", SummarizeParsedFormat(*f));
    f = ExtendedParsedFormat<Conv::d, Conv::s>::NewAllowIgnored("%dABC");
    ASSERT_TRUE(f);
    EXPECT_EQ("{d:1$d}[ABC]", SummarizeParsedFormat(*f));
    f = ExtendedParsedFormat<Conv::d, Conv::s>::NewAllowIgnored("ABC%2$s");
    ASSERT_TRUE(f);
    EXPECT_EQ("[ABC]{2$s:2$s}", SummarizeParsedFormat(*f));
  }
  
  TEST_F(ParsedFormatTest, UncheckedMultipleTypes) {
    auto dx = ExtendedParsedFormat<Conv::d | Conv::x>::New("%1$d %1$x");
    EXPECT_TRUE(dx);
    EXPECT_EQ("{1$d:1$d}[ ]{1$x:1$x}", SummarizeParsedFormat(*dx));
  
    dx = ExtendedParsedFormat<Conv::d | Conv::x>::New("%1$d");
    EXPECT_TRUE(dx);
    EXPECT_EQ("{1$d:1$d}", SummarizeParsedFormat(*dx));
  }
  
  TEST_F(ParsedFormatTest, UncheckedIncorrect) {
    EXPECT_FALSE(ExtendedParsedFormat<Conv::d>::New(""));
  
    EXPECT_FALSE(ExtendedParsedFormat<Conv::d>::New("ABC%dDEF%d"));
  
    std::string format = "%sFFF%dZZZ%f";
    EXPECT_FALSE((ExtendedParsedFormat<Conv::s, Conv::d, Conv::g>::New(format)));
  }
  
  TEST_F(ParsedFormatTest, RegressionMixPositional) {
    EXPECT_FALSE((ExtendedParsedFormat<Conv::d, Conv::o>::New("%1$d %o")));
  }
  
  }  // namespace
  }  // namespace absl
  
  // Some codegen thunks that we can use to easily dump the generated assembly for
  // different StrFormat calls.
  
  std::string CodegenAbslStrFormatInt(int i) {  // NOLINT
    return absl::StrFormat("%d", i);
  }
  
  std::string CodegenAbslStrFormatIntStringInt64(int i, const std::string& s,
                                                 int64_t i64) {  // NOLINT
    return absl::StrFormat("%d %s %d", i, s, i64);
  }
  
  void CodegenAbslStrAppendFormatInt(std::string* out, int i) {  // NOLINT
    absl::StrAppendFormat(out, "%d", i);
  }
  
  void CodegenAbslStrAppendFormatIntStringInt64(std::string* out, int i,
                                                const std::string& s,
                                                int64_t i64) {  // NOLINT
    absl::StrAppendFormat(out, "%d %s %d", i, s, i64);
  }
  