7.1.0

• Switched from Grisu3 to Dragonbox for the default floating-point formatting which gives the shortest decimal representation with round-trip guarantee and correct rounding (#1882, #1887, #1894). This makes {fmt} up to 20-30x faster than common implementations of std::ostringstream and sprintf on dtoa-benchmark and faster than double-conversion and Ryū:It is possible to get even better performance at the cost of larger binary size by compiling with the FMT_USE_FULL_CACHE_DRAGONBOX macro set to 1. Thanks @jk-jeon (Junekey Jeon).

• Added an experimental unsynchronized file output API which, together with format string compilation, can give 5-9 times speed up compared to fprintf on common platforms (godbolt):

  #include <fmt/os.h>
  
  int main() {
    auto f = fmt::output_file("guide");
    f.print("The answer is {}.", 42);
  }

• Added a formatter for std::chrono::time_point<system_clock> (#1819, #1837). For example (godbolt):

  #include <fmt/chrono.h>
  
  int main() {
    auto now = std::chrono::system_clock::now();
    fmt::print("The time is {:%H:%M:%S}.\n", now);
  }

  Thanks @adamburgess (Adam Burgess).

• Added support for ranges with non-const begin/end to fmt::join (#1784, #1786). For example (godbolt):

  #include <fmt/ranges.h>
  #include <range/v3/view/filter.hpp>
  
  int main() {
    using std::literals::string_literals::operator""s;
    auto strs = std::array{"a"s, "bb"s, "ccc"s};
    auto range = strs | ranges::views::filter(
      [] (const std::string &x) { return x.size() != 2; }
    );
    fmt::print("{}\n", fmt::join(range, ""));
  }

  prints "accc". Thanks @tonyelewis (Tony E Lewis).

• Added a memory_buffer::append overload that takes a range (#1806). Thanks @BRevzin (Barry Revzin).

• Improved handling of single code units in FMT_COMPILE. For example:

  #include <fmt/compile.h>
  
  char* f(char* buf) {
    return fmt::format_to(buf, FMT_COMPILE("x{}"), 42);
  }

  compiles to just (godbolt):

  _Z1fPc:
    movb $120, (%rdi)
    xorl %edx, %edx
    cmpl $42, _ZN3fmt2v76detail10basic_dataIvE23zero_or_powers_of_10_32E+8(%rip)
    movl $3, %eax
    seta %dl
    subl %edx, %eax
    movzwl _ZN3fmt2v76detail10basic_dataIvE6digitsE+84(%rip), %edx
    cltq
    addq %rdi, %rax
    movw %dx, -2(%rax)
    ret
  

  Here a single mov instruction writes 'x' ($120) to the output buffer.

• Added dynamic width support to format string compilation (#1809).

• Improved error reporting for unformattable types: now you'll get the type name directly in the error message instead of the note:

  #include <fmt/core.h>
  
  struct how_about_no {};
  
  int main() {
    fmt::print("{}", how_about_no());
  }

  Error (godbolt): fmt/core.h:1438:3: error: static_assert failed due to requirement 'fmt::v7::formattable<how_about_no>()' "Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt" ...

• Added the make_args_checked function template that allows you to write formatting functions with compile-time format string checks and avoid binary code bloat (godbolt):

  void vlog(const char* file, int line, fmt::string_view format,
            fmt::format_args args) {
    fmt::print("{}: {}: ", file, line);
    fmt::vprint(format, args);
  }
  
  template <typename S, typename... Args>
  void log(const char* file, int line, const S& format, Args&&... args) {
    vlog(file, line, format,
        fmt::make_args_checked<Args...>(format, args...));
  }
  
  #define MY_LOG(format, ...) \
    log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
  
  MY_LOG("invalid squishiness: {}", 42);

• Replaced snprintf fallback with a faster internal IEEE 754 float and double formatter for arbitrary precision. For example (godbolt):

  #include <fmt/core.h>
  
  int main() {
    fmt::print("{:.500}\n", 4.9406564584124654E-324);
  }

  prints 4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636163599237979656469544571773092665671035593979639877479601078187812630071319031140452784581716784898210368871863605699873072305000638740915356498438731247339727316961514003171538539807412623856559117102665855668676818703956031062493194527159149245532930545654440112748012970999954193198940908041656332452475714786901472678015935523861155013480352649347201937902681071074917033322268447533357208324319360923829e-324.

• Made format_to_n and formatted_size part of the core API (godbolt):

  #include <fmt/core.h>
  
  int main() {
    char buffer[10];
    auto result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 42);
  }

• Added fmt::format_to_n overload with format string compilation (#1764, #1767, #1869). For example (godbolt):

  #include <fmt/compile.h>
  
  int main() {
    char buffer[8];
    fmt::format_to_n(buffer, sizeof(buffer), FMT_COMPILE("{}"), 42);
  }

  Thanks @Kurkin (Dmitry Kurkin), @alexezeder (Alexey Ochapov).

• Added fmt::format_to overload that take text_style (#1593, #1842, #1843). For example (godbolt):

  #include <fmt/color.h>
  
  int main() {
    std::string out;
    fmt::format_to(std::back_inserter(out),
                   fmt::emphasis::bold | fg(fmt::color::red),
                   "The answer is {}.", 42);
  }

  Thanks @Naios (Denis Blank).

• Made the # specifier emit trailing zeros in addition to the decimal point (#1797). For example (godbolt):

  #include <fmt/core.h>
  
  int main() {
    fmt::print("{:#.2g}", 0.5);
  }

  prints 0.50.

• Changed the default floating point format to not include .0 for consistency with std::format and std::to_chars (#1893, #1943). It is possible to get the decimal point and trailing zero with the # specifier.

• Fixed an issue with floating-point formatting that could result in addition of a non-significant trailing zero in rare cases e.g. 1.00e-34 instead of 1.0e-34 (#1873, #1917).

• Made fmt::to_string fallback on ostream insertion operator if the formatter specialization is not provided (#1815, #1829). Thanks @alexezeder (Alexey Ochapov).

• Added support for the append mode to the experimental file API and improved fcntl.h detection. (#1847, #1848). Thanks @t-wiser.

• Fixed handling of types that have both an implicit conversion operator and an overloaded ostream insertion operator (#1766).

• Fixed a slicing issue in an internal iterator type (#1822). Thanks @BRevzin (Barry Revzin).

• Fixed an issue in locale-specific integer formatting (#1927).

• Fixed handling of exotic code unit types (#1870, #1932).

• Improved FMT_ALWAYS_INLINE (#1878). Thanks @jk-jeon (Junekey Jeon).

• Removed dependency on windows.h (#1900). Thanks @bernd5 (Bernd Baumanns).

• Optimized counting of decimal digits on MSVC (#1890). Thanks @mwinterb.

• Improved documentation (#1772, #1775, #1792, #1838, #1888, #1918, #1939). Thanks @leolchat (Léonard Gérard), @pepsiman (Malcolm Parsons), @Klaim (Joël Lamotte), @ravijanjam (Ravi J), @francesco-st, @udnaan (Adnan).

• Added the FMT_REDUCE_INT_INSTANTIATIONS CMake option that reduces the binary code size at the cost of some integer formatting performance. This can be useful for extremely memory-constrained embedded systems (#1778, #1781). Thanks @kammce (Khalil Estell).

• Added the FMT_USE_INLINE_NAMESPACES macro to control usage of inline namespaces (#1945). Thanks @darklukee.

• Improved build configuration (#1760, #1770, #1779, #1783, #1823). Thanks @dvetutnev (Dmitriy Vetutnev), @xvitaly (Vitaly Zaitsev), @tambry (Raul Tambre), @medithe, @martinwuehrer (Martin Wührer).

• Fixed various warnings and compilation issues (#1790, #1802, #1808, #1810, #1811, #1812, #1814, #1816, #1817, #1818, #1825, #1836, #1855, #1856, #1860, #1877, #1879, #1880, #1896, #1897, #1898, #1904, #1908, #1911, #1912, #1928, #1929, #1935 #1937, #1942, #1949). Thanks @TheQwertiest, @medithe, [@martinwuehrer (Martin Wührer)](h...

7.0.3

• Worked around broken numeric_limits for 128-bit integers (#1787).

• Added error reporting on missing named arguments (#1796).

• Stopped using 128-bit integers with clang-cl (#1800). Thanks @Kingcom.

• Fixed issues in locale-specific integer formatting (#1782, #1801).

7.0.2

• Worked around broken numeric_limits for 128-bit integers (#1725).

• Fixed compatibility with CMake 3.4 (#1779).

• Fixed handling of digit separators in locale-specific formatting (#1782).

7.0.1

• Updated the inline version namespace name.

• Worked around a gcc bug in mangling of alias templates (#1753).

• Fixed a linkage error on Windows (#1757). Thanks @Kurkin (Dmitry Kurkin).

• Fixed minor issues with the documentation.

7.0.0

• Reduced the library size. For example, on macOS a stripped test binary statically linked with {fmt} shrank from ~368k to less than 100k.

• Added a simpler and more efficient format string compilation API:

  #include <fmt/compile.h>
  
  // Converts 42 into std::string using the most efficient method and no
  // runtime format string processing.
  std::string s = fmt::format(FMT_COMPILE("{}"), 42);

  The old fmt::compile API is now deprecated.

  Thanks @ldionne (Louis Dionne) for the suggestion and @hanickadot (Hana Dusíková) for the initial prototype.

• Optimized integer formatting: format_to with format string compilation and a stack-allocated buffer is now faster than to_chars on both libc++ and libstdc++.

• Optimized handling of small format strings. For example,

  fmt::format("Result: {}: ({},{},{},{})", str1, str2, str3, str4, str5)

  is now ~40% faster (#1685).

• Applied extern templates to improve compile times when using the core API and fmt/format.h (#1452). For example, on macOS with clang the compile time of a test translation unit dropped from 2.3s to 0.3s with -O2 and from 0.6s to 0.3s with the default settings (-O0).

  Before (-O2):

  % time c++ -c test.cc -I include -std=c++17 -O2
  c++ -c test.cc -I include -std=c++17 -O2  2.22s user 0.08s system 99% cpu 2.311 total
  

  After (-O2):

  % time c++ -c test.cc -I include -std=c++17 -O2
  c++ -c test.cc -I include -std=c++17 -O2  0.26s user 0.04s system 98% cpu 0.303 total
  

  Before (default):

  % time c++ -c test.cc -I include -std=c++17
  c++ -c test.cc -I include -std=c++17  0.53s user 0.06s system 98% cpu 0.601 total
  

  After (default):

  % time c++ -c test.cc -I include -std=c++17
  c++ -c test.cc -I include -std=c++17  0.24s user 0.06s system 98% cpu 0.301 total
  

  It is still recommended to use fmt/core.h instead of fmt/format.h but the compile time difference is now smaller. Thanks @alex3d for the suggestion.

• Named arguments are now stored on stack (no dynamic memory allocations) and the compiled code is more compact and efficient. For example

  #include <fmt/core.h>
  
  int main() {
    fmt::print("The answer is {answer}\n", fmt::arg("answer", 42));
  }

  compiles to just (godbolt)

  .LC0:
          .string "answer"
  .LC1:
          .string "The answer is {answer}\n"
  main:
          sub     rsp, 56
          mov     edi, OFFSET FLAT:.LC1
          mov     esi, 23
          movabs  rdx, 4611686018427387905
          lea     rax, [rsp+32]
          lea     rcx, [rsp+16]
          mov     QWORD PTR [rsp+8], 1
          mov     QWORD PTR [rsp], rax
          mov     DWORD PTR [rsp+16], 42
          mov     QWORD PTR [rsp+32], OFFSET FLAT:.LC0
          mov     DWORD PTR [rsp+40], 0
          call    fmt::v6::vprint(fmt::v6::basic_string_view<char>,
                                  fmt::v6::format_args)
          xor     eax, eax
          add     rsp, 56
          ret
  
      .L.str.1:
              .asciz  "answer"
  

• Implemented compile-time checks for dynamic width and precision (#1614):

  #include <fmt/format.h>
  
  int main() {
    fmt::print(FMT_STRING("{0:{1}}"), 42);
  }

  now gives a compilation error because argument 1 doesn't exist:

  In file included from test.cc:1:
  include/fmt/format.h:2726:27: error: constexpr variable 'invalid_format' must be
  initialized by a constant expression
    FMT_CONSTEXPR_DECL bool invalid_format =
                            ^
  ...
  include/fmt/core.h:569:26: note: in call to
  '&checker(s, {}).context_->on_error(&"argument not found"[0])'
      if (id >= num_args_) on_error("argument not found");
                          ^
  

• Added sentinel support to fmt::join (#1689)

  struct zstring_sentinel {};
  bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
  bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
  
  struct zstring {
    const char* p;
    const char* begin() const { return p; }
    zstring_sentinel end() const { return {}; }
  };
  
  auto s = fmt::format("{}", fmt::join(zstring{"hello"}, "_"));
  // s == "h_e_l_l_o"

  Thanks @BRevzin (Barry Revzin).

• Added support for named args, clear and reserve to dynamic_format_arg_store (#1655, #1663, #1674, #1677). Thanks @vsolontsov-ll (Vladimir Solontsov).

• Added support for the 'c' format specifier to integral types for compatibility with std::format (#1652).

• Replaced the 'n' format specifier with 'L' for compatibility with std::format (#1624). The 'n' specifier can be enabled via the FMT_DEPRECATED_N_SPECIFIER macro.

• The '=' format specifier is now disabled by default for compatibility with std::format. It can be enabled via the FMT_DEPRECATED_NUMERIC_ALIGN macro.

• Removed the following deprecated APIs:

  • FMT_STRING_ALIAS and fmt macros - replaced by FMT_STRING

  • fmt::basic_string_view::char_type - replaced by fmt::basic_string_view::value_type

  • convert_to_int

  • format_arg_store::types

  • *parse_context - replaced by *format_parse_context

  • FMT_DEPRECATED_INCLUDE_OS

  • FMT_DEPRECATED_PERCENT - incompatible with std::format

  • *writer - replaced by compiled format API

• Renamed the internal namespace to detail (#1538). The former is still provided as an alias if the FMT_USE_INTERNAL macro is defined.

• Improved compatibility between fmt::printf with the standard specs (#1595, #1682, #1683, #1687, #1699). Thanks @rimathia.

• Fixed handling of operator<< overloads that use copyfmt (#1666).

• Added the FMT_OS CMake option to control inclusion of OS-specific APIs in the fmt target. This can be useful for embedded platforms (#1654, #1656). Thanks @kwesolowski (Krzysztof Wesolowski).

• Replaced FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION with the FMT_FUZZ macro to prevent interferring with fuzzing of projects using {fmt} (#1650). Thanks @asraa (Asra Ali).

• Fixed compatibility with emscripten (#1636, #1637). Thanks @ArthurSonzogni (Arthur Sonzogni).

• Improved documentation (#704, #1643, #1660, #1681, #1691, #1706, #1714, #1721, #1739, #1740, #1741, #1751). Thanks @senior7515 (Alexander Gallego), @lsr0 (Lindsay Roberts), @puetzk (Kevin Puetz), @fpelliccioni (Fernando Pelliccioni), Alexey Kuzmenko, @jelly (jelle van der Waa), @claremacrae (Clare Macrae), @jiapengwen (文佳鹏), @gsjaardema (Greg Sjaardema), @alexey-milovidov.

• Implemented various build configuration fixes and improvements (#1603, #1657, #1702, #1728). Thanks @scramsby (Scott Ramsby), @jtojnar (Jan Tojnar), @orivej (Orivej Desh), @flagarde.

• Fixed various warnings and compilation issues (#1616, #1620, #1622, #1625, #1627, #1628, #1629, #1631, #1633, #1649, #1658, #1661, #1667, #1668, #1669, #1692, #1696, #1697, #1707, #1712, #1716, #1722, #1724, #1729, #1738, #1742, #1743, #1744, #1747, #1750). Thanks @gsjaardema (Greg Sjaardema), @gabime (Gabi Melman), @johnor (Johan), @gabime (Dmitry Kurkin), @invexed (James Beach), @peterbell10, @daixtrose (Markus Werle), @petrutlucian94 (Lucian Petrut), @Neargye (Daniil Goncharov), @ambitslix (Attila M. Szilagyi), @gabime (Gabi Melman), @erthink (Leonid Yuriev), @tohammer (Tobias Hammer), @0x8000-0000 (Florin Iucha).

6.2.1

• Fixed ostream support in sprintf (#1631).

• Fixed type detection when using implicit conversion to string_view and ostream operator<< inconsistently (#1662).

6.2.0

• Improved error reporting when trying to format an object of a non-formattable type:

  fmt::format("{}", S());

  now gives:

  include/fmt/core.h:1015:5: error: static_assert failed due to requirement
  'formattable' "Cannot format argument. To make type T formattable provide a
  formatter<T> specialization:
  https://fmt.dev/latest/api.html#formatting-user-defined-types"
      static_assert(
      ^
  ...
  note: in instantiation of function template specialization
  'fmt::v6::format<char [3], S, char>' requested here
    fmt::format("{}", S());
         ^
  

  if S is not formattable.

• Reduced library size by ~10%.

• Always print decimal point if # is specified (#1476, #1498):

  fmt::print("{:#.0f}", 42.0);

  now prints 42.

• Implemented the 'L' specifier for locale-specific numeric formatting to improve compatibility with std::format. The 'n' specifier is now deprecated and will be removed in the next major release.

• Moved OS-specific APIs such as windows_error from fmt/format.h to fmt/os.h. You can define FMT_DEPRECATED_INCLUDE_OS to automatically include fmt/os.h from fmt/format.h for compatibility but this will be disabled in the next major release.

• Added precision overflow detection in floating-point formatting.

• Implemented detection of invalid use of fmt::arg.

• Used type_identity to block unnecessary template argument deduction. Thanks Tim Song.

• Improved UTF-8 handling (#1109):

  fmt::print("┌{0:─^{2}}┐\n"
             "│{1: ^{2}}│\n"
             "└{0:─^{2}}┘\n", "", "Привет, мир!", 20);

  now prints:

  ┌────────────────────┐
  │    Привет, мир!    │
  └────────────────────┘
  

  on systems that support Unicode.

• Added experimental dynamic argument storage (#1170, #1584):

  fmt::dynamic_format_arg_store<fmt::format_context> store;
  store.push_back("answer");
  store.push_back(42);
  fmt::vprint("The {} is {}.\n", store);

  prints:

  The answer is 42.
  

  Thanks @vsolontsov-ll (Vladimir Solontsov).

• Made fmt::join accept initializer_list (#1591). Thanks @Rapotkinnik (Nikolay Rapotkin).

• Fixed handling of empty tuples (#1588).

• Fixed handling of output iterators in format_to_n (#1506).

• Fixed formatting of std::chrono::duration types to wide output (#1533). Thanks @zeffy (pilao).

• Added const begin and end overload to buffers (#1553). Thanks @dominicpoeschko.

• Added the ability to disable floating-point formatting via FMT_USE_FLOAT, FMT_USE_DOUBLE and FMT_USE_LONG_DOUBLE macros for extremely memory-constrained embedded system (#1590). Thanks @albaguirre (Alberto Aguirre).

• Made FMT_STRING work with constexpr string_view (#1589). Thanks @scramsby (Scott Ramsby).

• Implemented a minor optimization in the format string parser (#1560). Thanks @IkarusDeveloper.

• Improved attribute detection (#1469, #1475, #1576). Thanks @federico-busato (Federico), @chronoxor (Ivan Shynkarenka), @refnum.

• Improved documentation (#1481, #1523). Thanks @JackBoosY (Jack·Boos·Yu), @imba-tjd (谭九鼎).

• Fixed symbol visibility on Linux when compiling with -fvisibility=hidden (#1535). Thanks @milianw (Milian Wolff).

• Implemented various build configuration fixes and improvements (#1264, #1460, #1534, #1536, #1545, #1546, #1566, #1582, #1597, #1598). Thanks @ambitslix (Attila M. Szilagyi), @jwillikers (Jordan Williams), @stac47 (Laurent Stacul).

• Fixed various warnings and compilation issues (#1433, #1461, #1470, #1480, #1485, #1492, #1493, #1504, #1505, #1512, #1515, #1516, #1518, #1519, #1520, #1521, #1522, #1524, #1530, #1531, #1532, #1539, #1547, #1548, #1554, #1567, #1568, #1569, #1571, #1573, #1575, #1581, #1583, #1586, #1587, #1594, #1596, #1604, #1606, #1607, #1609). Thanks @marti4d (Chris Martin), @iPherian, @parkertomatoes, @gsjaardema (Greg Sjaardema), @chronoxor (Ivan Shynkarenka), @DanielaE (Daniela Engert), @torsten48, @tohammer (Tobias Hammer), @lefticus (Jason Turner), @ryusakki (Haise), @adnsv (Alex Denisov), @fghzxm, @refnum, @pramodk (Pramod Kumbhar), @Spirrwell, @scramsby (Scott Ramsby).

6.1.2

• Fixed ABI compatibility with libfmt.so.6.0.0 (#1471).

• Fixed handling types convertible to std::string_view (#1451). Thanks @denizevrenci (Deniz Evrenci).

• Made CUDA test an opt-in enabled via the FMT_CUDA_TEST CMake option.

• Fixed sign conversion warnings (#1440). Thanks @0x8000-0000 (Florin Iucha).

6.1.1

• Fixed shared library build on Windows (#1443, #1445, #1446, #1450). Thanks @egorpugin (Egor Pugin), @bbolli (Beat Bolli).

• Added a missing decimal point in exponent notation with trailing zeros.

• Removed deprecated format_arg_store::TYPES.

6.1.0

• {fmt} now formats IEEE 754 float and double using the shortest decimal representation with correct rounding by default:

  #include <cmath>
  #include <fmt/core.h>
  
  int main() {
    fmt::print("{}", M_PI);
  }

  prints 3.141592653589793.

• Made the fast binary to decimal floating-point formatter the default, simplified it and improved performance. {fmt} is now 15 times faster than libc++'s std::ostringstream, 11 times faster than printf and 10% faster than double-conversion on dtoa-benchmark:

  Function	Time (ns)	Speedup
  ostringstream	1,346.30	1.00x
  ostrstream	1,195.74	1.13x
  sprintf	995.08	1.35x
  doubleconv	99.10	13.59x
  fmt	88.34	15.24x

  

• {fmt} no longer converts float arguments to double. In particular this improves the default (shortest) representation of floats and makes fmt::format consistent with std::format specs (#1336, #1353, #1360, #1361):

  fmt::print("{}", 0.1f);

  prints 0.1 instead of 0.10000000149011612. Thanks @orivej (Orivej Desh).

• Made floating-point formatting output consistent with printf/iostreams (#1376, #1417).

• Added support for 128-bit integers (#1287):

  fmt::print("{}", std::numeric_limits<__int128_t>::max());

  prints 170141183460469231731687303715884105727. Thanks @denizevrenci (Deniz Evrenci).

• The overload of print that takes text_style is now atomic, i.e. the output from different threads doesn't interleave (#1351). Thanks @tankiJong (Tanki Zhang).

• Made compile time in the header-only mode ~20% faster by reducing the number of template instantiations. wchar_t overload of vprint was moved from fmt/core.h to fmt/format.h.

• Added an overload of fmt::join that works with tuples (#1322, #1330):

  #include <tuple>
  #include <fmt/ranges.h>
  
  int main() {
    std::tuple<char, int, float> t{'a', 1, 2.0f};
    fmt::print("{}", t);
  }

  prints ('a', 1, 2.0). Thanks @jeremyong (Jeremy Ong).

• Changed formatting of octal zero with prefix from "00" to "0":

  fmt::print("{:#o}", 0);

  prints 0.

• The locale is now passed to ostream insertion (<<) operators (#1406):

  #include <fmt/locale.h>
  #include <fmt/ostream.h>
  
  struct S {
    double value;
  };
  
  std::ostream& operator<<(std::ostream& os, S s) {
    return os << s.value;
  }
  
  int main() {
    auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42});
    // s == "0,42"
  }

  Thanks @dlaugt (Daniel Laügt).

• Locale-specific number formatting now uses grouping (#1393 #1394). Thanks @skrdaniel.

• Fixed handling of types with deleted implicit rvalue conversion to const char** (#1421):

  struct mystring {
    operator const char*() const&;
    operator const char*() &;
    operator const char*() const&& = delete;
    operator const char*() && = delete;
  };
  mystring str;
  fmt::print("{}", str); // now compiles

• Enums are now mapped to correct underlying types instead of int (#1286). Thanks @agmt (Egor Seredin).

• Enum classes are no longer implicitly converted to int (#1424).

• Added basic_format_parse_context for consistency with C++20 std::format and deprecated basic_parse_context.

• Fixed handling of UTF-8 in precision (#1389, #1390). Thanks @tajtiattila (Attila Tajti).

• {fmt} can now be installed on Linux, macOS and Windows with Conda using its conda-forge package (#1410):

  conda install -c conda-forge fmt
  

  Thanks @tdegeus (Tom de Geus).

• Added a CUDA test (#1285, #1317). Thanks @luncliff (Park DongHa) and @risa2000.

• Improved documentation (#1276, #1291, #1296, #1315, #1332, #1337, #1395 #1418). Thanks @waywardmonkeys (Bruce Mitchener), @pauldreik (Paul Dreik), @jackoalan (Jack Andersen).

• Various code improvements (#1358, #1407). Thanks @orivej (Orivej Desh), @dpacbach (David P. Sicilia),

• Fixed compile-time format string checks for user-defined types (#1292).

• Worked around a false positive in unsigned-integer-overflow sanitizer (#1377).

• Fixed various warnings and compilation issues (#1273, #1278, #1280, #1281, #1288, #1290, #1301, #1305, #1306, #1309, #1312, #1313, #1316, #1319, #1320, #1326, #1328, #1344, #1345, #1347, #1349, #1354, #1362, #1366, #1364, #1370, #1371, #1385, #1388, #1397, #1414, #1416, #1422 #1427, #1431, #1433). Thanks @hhb, @gsjaardema (Greg Sjaardema), @gabime (Gabi Melman), @neheb (Rosen Penev), @vedranmiletic (Vedran Miletić), @dkavolis (Daumantas Kavolis), @mwinterb, @orivej (Orivej Desh), @denizevrenci (Deniz Evrenci) @leonklingele, @chronoxor (Ivan Shynkarenka), @kent-tri, @0x8000-0000 (Florin Iucha), @marti4d (Chris Martin).