# 11.0.2 - TBD - Fixed compatibility with non-POSIX systems (https://github.com/fmtlib/fmt/issues/4054). - Made `Glib::ustring` not be confused with `std::string` (https://github.com/fmtlib/fmt/issues/4052). # 11.0.1 - 2024-07-05 - Fixed version number in the inline namespace (https://github.com/fmtlib/fmt/issues/4047). - Fixed disabling Unicode support via CMake (https://github.com/fmtlib/fmt/issues/4051). - Fixed deprecated `visit_format_arg` (https://github.com/fmtlib/fmt/pull/4043). Thanks @nebkat. - Fixed handling of a sign and improved the `std::complex` formater (https://github.com/fmtlib/fmt/pull/4034, https://github.com/fmtlib/fmt/pull/4050). Thanks @tesch1 and @phprus. - Removed a redundant check in the formatter for `std::expected` (https://github.com/fmtlib/fmt/pull/4040). Thanks @phprus. # 11.0.0 - 2024-07-01 - Added `fmt/base.h` which provides a subset of the API with minimal include dependencies and enough functionality to replace all uses of the `printf` family of functions. This brings the compile time of code using {fmt} much closer to the equivalent `printf` code as shown on the following benchmark that compiles 100 source files: | Method | Compile Time (s) | |--------------|------------------| | printf | 1.6 | | IOStreams | 25.9 | | fmt 10.x | 19.0 | | fmt 11.0 | 4.8 | | tinyformat | 29.1 | | Boost Format | 55.0 | This gives almost 4x improvement in build speed compared to version 10. Note that the benchmark is purely formatting code and includes. In real projects the difference from `printf` will be smaller partly because common standard headers will be included in almost any translation unit (TU) anyway. In particular, in every case except `printf` above ~1s is spent in total on including `` in all TUs. - Optimized includes in other headers such as `fmt/format.h` which is now roughly equivalent to the old `fmt/core.h` in terms of build speed. - Migrated the documentation at https://fmt.dev/ from Sphinx to MkDocs. - Improved C++20 module support (https://github.com/fmtlib/fmt/issues/3990, https://github.com/fmtlib/fmt/pull/3991, https://github.com/fmtlib/fmt/issues/3993, https://github.com/fmtlib/fmt/pull/3994, https://github.com/fmtlib/fmt/pull/3997, https://github.com/fmtlib/fmt/pull/3998, https://github.com/fmtlib/fmt/pull/4004, https://github.com/fmtlib/fmt/pull/4005, https://github.com/fmtlib/fmt/pull/4006, https://github.com/fmtlib/fmt/pull/4013, https://github.com/fmtlib/fmt/pull/4027, https://github.com/fmtlib/fmt/pull/4029). In particular, native CMake support for modules is now used if available. Thanks @yujincheng08 and @matt77hias. - Added an option to replace standard includes with `import std` enabled via the `FMT_IMPORT_STD` macro (https://github.com/fmtlib/fmt/issues/3921, https://github.com/fmtlib/fmt/pull/3928). Thanks @matt77hias. - Exported `fmt::range_format`, `fmt::range_format_kind` and `fmt::compiled_string` from the `fmt` module (https://github.com/fmtlib/fmt/pull/3970, https://github.com/fmtlib/fmt/pull/3999). Thanks @matt77hias and @yujincheng08. - Improved integration with stdio in `fmt::print`, enabling direct writes into a C stream buffer in common cases. This may give significant performance improvements ranging from tens of percent to [2x]( https://stackoverflow.com/a/78457454/471164) and eliminates dynamic memory allocations on the buffer level. It is currently enabled for built-in and string types with wider availability coming up in future releases. For example, it gives ~24% improvement on a [simple benchmark]( https://isocpp.org/files/papers/P3107R5.html#perf) compiled with Apple clang version 15.0.0 (clang-1500.1.0.2.5) and run on macOS 14.2.1: ``` ------------------------------------------------------- Benchmark Time CPU Iterations ------------------------------------------------------- printf 81.8 ns 81.5 ns 8496899 fmt::print (10.x) 63.8 ns 61.9 ns 11524151 fmt::print (11.0) 51.3 ns 51.0 ns 13846580 ``` - Improved safety of `fmt::format_to` when writing to an array (https://github.com/fmtlib/fmt/pull/3805). For example ([godbolt](https://www.godbolt.org/z/cYrn8dWY8)): ```c++ auto volkswagen = char[4]; auto result = fmt::format_to(volkswagen, "elephant"); ``` no longer results in a buffer overflow. Instead the output will be truncated and you can get the end iterator and whether truncation occurred from the `result` object. Thanks @ThePhD. - Enabled Unicode support by default in MSVC, bringing it on par with other compilers and making it unnecessary for users to enable it explicitly. Most of {fmt} is encoding-agnostic but this prevents mojibake in places where encoding matters such as path formatting and terminal output. You can control the Unicode support via the CMake `FMT_UNICODE` option. Note that some {fmt} packages such as the one in vcpkg have already been compiled with Unicode enabled. - Added a formatter for `std::expected` (https://github.com/fmtlib/fmt/pull/3834). Thanks @dominicpoeschko. - Added a formatter for `std::complex` (https://github.com/fmtlib/fmt/issues/1467, https://github.com/fmtlib/fmt/issues/3886, https://github.com/fmtlib/fmt/pull/3892, https://github.com/fmtlib/fmt/pull/3900). Thanks @phprus. - Added a formatter for `std::type_info` (https://github.com/fmtlib/fmt/pull/3978). Thanks @matt77hias. - Specialized `formatter` for `std::basic_string` types with custom traits and allocators (https://github.com/fmtlib/fmt/issues/3938, https://github.com/fmtlib/fmt/pull/3943). Thanks @dieram3. - Added formatters for `std::chrono::day`, `std::chrono::month`, `std::chrono::year` and `std::chrono::year_month_day` (https://github.com/fmtlib/fmt/issues/3758, https://github.com/fmtlib/fmt/issues/3772, https://github.com/fmtlib/fmt/pull/3906, https://github.com/fmtlib/fmt/pull/3913). For example: ```c++ #include #include int main() { fmt::print(fg(fmt::color::green), "{}\n", std::chrono::day(7)); } ``` prints a green day: image Thanks @zivshek. - Fixed handling of precision in `%S` (https://github.com/fmtlib/fmt/issues/3794, https://github.com/fmtlib/fmt/pull/3814). Thanks @js324. - Added support for the `-` specifier (glibc `strftime` extension) to day of the month (`%d`) and week of the year (`%W`, `%U`, `%V`) specifiers (https://github.com/fmtlib/fmt/pull/3976). Thanks @ZaheenJ. - Fixed the scope of the `-` extension in chrono formatting so that it doesn't apply to subsequent specifiers (https://github.com/fmtlib/fmt/issues/3811, https://github.com/fmtlib/fmt/pull/3812). Thanks @phprus. - Improved handling of `time_point::min()` (https://github.com/fmtlib/fmt/issues/3282). - Added support for character range formatting (https://github.com/fmtlib/fmt/issues/3857, https://github.com/fmtlib/fmt/pull/3863). Thanks @js324. - Added `string` and `debug_string` range formatters (https://github.com/fmtlib/fmt/pull/3973, https://github.com/fmtlib/fmt/pull/4024). Thanks @matt77hias. - Enabled ADL for `begin` and `end` in `fmt::join` (https://github.com/fmtlib/fmt/issues/3813, https://github.com/fmtlib/fmt/pull/3824). Thanks @bbolli. - Made contiguous iterator optimizations apply to `std::basic_string` iterators (https://github.com/fmtlib/fmt/pull/3798). Thanks @phprus. - Added support for ranges with mutable `begin` and `end` (https://github.com/fmtlib/fmt/issues/3752, https://github.com/fmtlib/fmt/pull/3800, https://github.com/fmtlib/fmt/pull/3955). Thanks @tcbrindle and @Arghnews. - Added support for move-only iterators to `fmt::join` (https://github.com/fmtlib/fmt/issues/3802, https://github.com/fmtlib/fmt/pull/3946). Thanks @Arghnews. - Moved range and iterator overloads of `fmt::join` to `fmt/ranges.h`, next to other overloads. - Fixed handling of types with `begin` returning `void` such as Eigen matrices (https://github.com/fmtlib/fmt/issues/3839, https://github.com/fmtlib/fmt/pull/3964). Thanks @Arghnews. - Added an `fmt::formattable` concept (https://github.com/fmtlib/fmt/pull/3974). Thanks @matt77hias. - Added support for `__float128` (https://github.com/fmtlib/fmt/issues/3494). - Fixed rounding issues when formatting `long double` with fixed precision (https://github.com/fmtlib/fmt/issues/3539). - Made `fmt::isnan` not trigger floating-point exception for NaN values (https://github.com/fmtlib/fmt/issues/3948, https://github.com/fmtlib/fmt/pull/3951). Thanks @alexdewar. - Removed dependency on `` for `std::allocator_traits` when possible (https://github.com/fmtlib/fmt/pull/3804). Thanks @phprus. - Enabled compile-time checks in formatting functions that take text colors and styles. - Deprecated wide stream overloads of `fmt::print` that take text styles. - Made format string compilation work with clang 12 and later despite only partial non-type template parameter support (https://github.com/fmtlib/fmt/issues/4000, https://github.com/fmtlib/fmt/pull/4001). Thanks @yujincheng08. - Made `fmt::iterator_buffer`'s move constructor `noexcept` (https://github.com/fmtlib/fmt/pull/3808). Thanks @waywardmonkeys. - Started enforcing that `formatter::format` is const for compatibility with `std::format` (https://github.com/fmtlib/fmt/issues/3447). - Added `fmt::basic_format_arg::visit` and deprecated `fmt::visit_format_arg`. - Made `fmt::basic_string_view` not constructible from `nullptr` for consistency with `std::string_view` in C++23 (https://github.com/fmtlib/fmt/pull/3846). Thanks @dalle. - Fixed `fmt::group_digits` for negative integers (https://github.com/fmtlib/fmt/issues/3891, https://github.com/fmtlib/fmt/pull/3901). Thanks @phprus. - Fixed handling of negative ids in `fmt::basic_format_args::get` (https://github.com/fmtlib/fmt/pull/3945). Thanks @marlenecota. - Improved named argument validation (https://github.com/fmtlib/fmt/issues/3817). - Disabled copy construction/assignment for `fmt::format_arg_store` and fixed moved construction (https://github.com/fmtlib/fmt/pull/3833). Thanks @ivafanas. - Worked around a locale issue in RHEL/devtoolset (https://github.com/fmtlib/fmt/issues/3858, https://github.com/fmtlib/fmt/pull/3859). Thanks @g199209. - Added RTTI detection for MSVC (https://github.com/fmtlib/fmt/pull/3821, https://github.com/fmtlib/fmt/pull/3963). Thanks @edo9300. - Migrated the documentation from Sphinx to MkDocs. - Improved documentation and README (https://github.com/fmtlib/fmt/issues/3775, https://github.com/fmtlib/fmt/pull/3784, https://github.com/fmtlib/fmt/issues/3788, https://github.com/fmtlib/fmt/pull/3789, https://github.com/fmtlib/fmt/pull/3793, https://github.com/fmtlib/fmt/issues/3818, https://github.com/fmtlib/fmt/pull/3820, https://github.com/fmtlib/fmt/pull/3822, https://github.com/fmtlib/fmt/pull/3843, https://github.com/fmtlib/fmt/pull/3890, https://github.com/fmtlib/fmt/issues/3894, https://github.com/fmtlib/fmt/pull/3895, https://github.com/fmtlib/fmt/pull/3905, https://github.com/fmtlib/fmt/issues/3942, https://github.com/fmtlib/fmt/pull/4008). Thanks @zencatalyst, WolleTD, @tupaschoal, @Dobiasd, @frank-weinberg, @bbolli, @phprus, @waywardmonkeys, @js324 and @tchaikov. - Improved CI and tests (https://github.com/fmtlib/fmt/issues/3878, https://github.com/fmtlib/fmt/pull/3883, https://github.com/fmtlib/fmt/issues/3897, https://github.com/fmtlib/fmt/pull/3979, https://github.com/fmtlib/fmt/pull/3980, https://github.com/fmtlib/fmt/pull/3988, https://github.com/fmtlib/fmt/pull/4010, https://github.com/fmtlib/fmt/pull/4012, https://github.com/fmtlib/fmt/pull/4038). Thanks @vgorrX, @waywardmonkeys, @tchaikov and @phprus. - Fixed buffer overflow when using format string compilation with debug format and `std::back_insert_iterator` (https://github.com/fmtlib/fmt/issues/3795, https://github.com/fmtlib/fmt/pull/3797). Thanks @phprus. - Improved Bazel support (https://github.com/fmtlib/fmt/pull/3792, https://github.com/fmtlib/fmt/pull/3801, https://github.com/fmtlib/fmt/pull/3962, https://github.com/fmtlib/fmt/pull/3965). Thanks @Vertexwahn. - Improved/fixed the CMake config (https://github.com/fmtlib/fmt/issues/3777, https://github.com/fmtlib/fmt/pull/3783, https://github.com/fmtlib/fmt/issues/3847, https://github.com/fmtlib/fmt/pull/3907). Thanks @phprus and @xTachyon. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/3685, https://github.com/fmtlib/fmt/issues/3769, https://github.com/fmtlib/fmt/issues/3796, https://github.com/fmtlib/fmt/issues/3803, https://github.com/fmtlib/fmt/pull/3806, https://github.com/fmtlib/fmt/pull/3807, https://github.com/fmtlib/fmt/issues/3809, https://github.com/fmtlib/fmt/pull/3810, https://github.com/fmtlib/fmt/issues/3830, https://github.com/fmtlib/fmt/pull/3832, https://github.com/fmtlib/fmt/issues/3835, https://github.com/fmtlib/fmt/pull/3844, https://github.com/fmtlib/fmt/issues/3854, https://github.com/fmtlib/fmt/pull/3856, https://github.com/fmtlib/fmt/pull/3865, https://github.com/fmtlib/fmt/pull/3866, https://github.com/fmtlib/fmt/pull/3880, https://github.com/fmtlib/fmt/issues/3881, https://github.com/fmtlib/fmt/issues/3884, https://github.com/fmtlib/fmt/issues/3898, https://github.com/fmtlib/fmt/pull/3899, https://github.com/fmtlib/fmt/pull/3909, https://github.com/fmtlib/fmt/pull/3917, https://github.com/fmtlib/fmt/pull/3923, https://github.com/fmtlib/fmt/pull/3924, https://github.com/fmtlib/fmt/issues/3925, https://github.com/fmtlib/fmt/pull/3930, https://github.com/fmtlib/fmt/pull/3931, https://github.com/fmtlib/fmt/pull/3933, https://github.com/fmtlib/fmt/issues/3935, https://github.com/fmtlib/fmt/pull/3937, https://github.com/fmtlib/fmt/pull/3967, https://github.com/fmtlib/fmt/pull/3968, https://github.com/fmtlib/fmt/pull/3972, https://github.com/fmtlib/fmt/pull/3983, https://github.com/fmtlib/fmt/issues/3992, https://github.com/fmtlib/fmt/pull/3995, https://github.com/fmtlib/fmt/pull/4009, https://github.com/fmtlib/fmt/pull/4023). Thanks @hmbj, @phprus, @res2k, @Baardi, @matt77hias, @waywardmonkeys, @hmbj, @yakra, @prlw1, @Arghnews, @mtillmann0, @ShifftC, @eepp, @jimmy-park and @ChristianGebhardt. # 10.2.1 - 2024-01-04 - Fixed ABI compatibility with earlier 10.x versions (https://github.com/fmtlib/fmt/issues/3785, https://github.com/fmtlib/fmt/pull/3786). Thanks @saraedum. # 10.2.0 - 2024-01-01 - Added support for the `%j` specifier (the number of days) for `std::chrono::duration` (https://github.com/fmtlib/fmt/issues/3643, https://github.com/fmtlib/fmt/pull/3732). Thanks @intelfx. - Added support for the chrono suffix for days and changed the suffix for minutes from "m" to the correct "min" (https://github.com/fmtlib/fmt/issues/3662, https://github.com/fmtlib/fmt/pull/3664). For example ([godbolt](https://godbolt.org/z/9KhMnq9ba)): ```c++ #include int main() { fmt::print("{}\n", std::chrono::days(42)); // prints "42d" } ``` Thanks @Richardk2n. - Fixed an overflow in `std::chrono::time_point` formatting with large dates (https://github.com/fmtlib/fmt/issues/3725, https://github.com/fmtlib/fmt/pull/3727). Thanks @cschreib. - Added a formatter for `std::source_location` (https://github.com/fmtlib/fmt/pull/3730). For example ([godbolt](https://godbolt.org/z/YajfKjhhr)): ```c++ #include #include int main() { fmt::print("{}\n", std::source_location::current()); } ``` prints ``` /app/example.cpp:5:51: int main() ``` Thanks @felix642. - Added a formatter for `std::bitset` (https://github.com/fmtlib/fmt/pull/3660). For example ([godbolt](https://godbolt.org/z/bdEaGeYxe)): ```c++ #include #include int main() { fmt::print("{}\n", std::bitset<6>(42)); // prints "101010" } ``` Thanks @muggenhor. - Added an experimental `nested_formatter` that provides an easy way of applying a formatter to one or more subobjects while automatically handling width, fill and alignment. For example: ```c++ #include struct point { double x, y; }; template <> struct fmt::formatter : nested_formatter { auto format(point p, format_context& ctx) const { return write_padded(ctx, [=](auto out) { return format_to(out, "({}, {})", nested(p.x), nested(p.y)); }); } }; int main() { fmt::print("[{:>20.2f}]", point{1, 2}); } ``` prints ``` [ (1.00, 2.00)] ``` - Added the generic representation (`g`) to `std::filesystem::path` (https://github.com/fmtlib/fmt/issues/3715, https://github.com/fmtlib/fmt/pull/3729). For example: ```c++ #include #include int main() { fmt::print("{:g}\n", std::filesystem::path("C:\\foo")); } ``` prints `"C:/foo"` on Windows. Thanks @js324. - Made `format_as` work with references (https://github.com/fmtlib/fmt/pull/3739). Thanks @tchaikov. - Fixed formatting of invalid UTF-8 with precision (https://github.com/fmtlib/fmt/issues/3284). - Fixed an inconsistency between `fmt::to_string` and `fmt::format` (https://github.com/fmtlib/fmt/issues/3684). - Disallowed unsafe uses of `fmt::styled` (https://github.com/fmtlib/fmt/issues/3625): ```c++ auto s = fmt::styled(std::string("dangle"), fmt::emphasis::bold); fmt::print("{}\n", s); // compile error ``` Pass `fmt::styled(...)` as a parameter instead. - Added a null check when formatting a C string with the `s` specifier (https://github.com/fmtlib/fmt/issues/3706). - Disallowed the `c` specifier for `bool` (https://github.com/fmtlib/fmt/issues/3726, https://github.com/fmtlib/fmt/pull/3734). Thanks @js324. - Made the default formatting unlocalized in `fmt::ostream_formatter` for consistency with the rest of the library (https://github.com/fmtlib/fmt/issues/3460). - Fixed localized formatting in bases other than decimal (https://github.com/fmtlib/fmt/issues/3693, https://github.com/fmtlib/fmt/pull/3750). Thanks @js324. - Fixed a performance regression in experimental `fmt::ostream::print` (https://github.com/fmtlib/fmt/issues/3674). - Added synchronization with the underlying output stream when writing to the Windows console (https://github.com/fmtlib/fmt/pull/3668, https://github.com/fmtlib/fmt/issues/3688, https://github.com/fmtlib/fmt/pull/3689). Thanks @Roman-Koshelev and @dimztimz. - Changed to only export `format_error` when {fmt} is built as a shared library (https://github.com/fmtlib/fmt/issues/3626, https://github.com/fmtlib/fmt/pull/3627). Thanks @phprus. - Made `fmt::streamed` `constexpr`. (https://github.com/fmtlib/fmt/pull/3650). Thanks @muggenhor. - Made `fmt::format_int` `constexpr` (https://github.com/fmtlib/fmt/issues/4031, https://github.com/fmtlib/fmt/pull/4032). Thanks @dixlorenz. - Enabled `consteval` on older versions of MSVC (https://github.com/fmtlib/fmt/pull/3757). Thanks @phprus. - Added an option to build without `wchar_t` support on Windows (https://github.com/fmtlib/fmt/issues/3631, https://github.com/fmtlib/fmt/pull/3636). Thanks @glebm. - Improved build and CI configuration (https://github.com/fmtlib/fmt/pull/3679, https://github.com/fmtlib/fmt/issues/3701, https://github.com/fmtlib/fmt/pull/3702, https://github.com/fmtlib/fmt/pull/3749). Thanks @jcar87, @pklima and @tchaikov. - Fixed various warnings, compilation and test issues (https://github.com/fmtlib/fmt/issues/3607, https://github.com/fmtlib/fmt/pull/3610, https://github.com/fmtlib/fmt/pull/3624, https://github.com/fmtlib/fmt/pull/3630, https://github.com/fmtlib/fmt/pull/3634, https://github.com/fmtlib/fmt/pull/3638, https://github.com/fmtlib/fmt/issues/3645, https://github.com/fmtlib/fmt/issues/3646, https://github.com/fmtlib/fmt/pull/3647, https://github.com/fmtlib/fmt/pull/3652, https://github.com/fmtlib/fmt/issues/3654, https://github.com/fmtlib/fmt/pull/3663, https://github.com/fmtlib/fmt/issues/3670, https://github.com/fmtlib/fmt/pull/3680, https://github.com/fmtlib/fmt/issues/3694, https://github.com/fmtlib/fmt/pull/3695, https://github.com/fmtlib/fmt/pull/3699, https://github.com/fmtlib/fmt/issues/3705, https://github.com/fmtlib/fmt/issues/3710, https://github.com/fmtlib/fmt/issues/3712, https://github.com/fmtlib/fmt/pull/3713, https://github.com/fmtlib/fmt/issues/3714, https://github.com/fmtlib/fmt/pull/3716, https://github.com/fmtlib/fmt/pull/3723, https://github.com/fmtlib/fmt/issues/3738, https://github.com/fmtlib/fmt/issues/3740, https://github.com/fmtlib/fmt/pull/3741, https://github.com/fmtlib/fmt/pull/3743, https://github.com/fmtlib/fmt/issues/3745, https://github.com/fmtlib/fmt/pull/3747, https://github.com/fmtlib/fmt/pull/3748, https://github.com/fmtlib/fmt/pull/3751, https://github.com/fmtlib/fmt/pull/3754, https://github.com/fmtlib/fmt/pull/3755, https://github.com/fmtlib/fmt/issues/3760, https://github.com/fmtlib/fmt/pull/3762, https://github.com/fmtlib/fmt/issues/3763, https://github.com/fmtlib/fmt/pull/3764, https://github.com/fmtlib/fmt/issues/3774, https://github.com/fmtlib/fmt/pull/3779). Thanks @danakj, @vinayyadav3016, @cyyever, @phprus, @qimiko, @saschasc, @gsjaardema, @lazka, @Zhaojun-Liu, @carlsmedstad, @hotwatermorning, @cptFracassa, @kuguma, @PeterJohnson, @H1X4Dev, @asantoni, @eltociear, @msimberg, @tchaikov, @waywardmonkeys. - Improved documentation and README (https://github.com/fmtlib/fmt/issues/2086, https://github.com/fmtlib/fmt/issues/3637, https://github.com/fmtlib/fmt/pull/3642, https://github.com/fmtlib/fmt/pull/3653, https://github.com/fmtlib/fmt/pull/3655, https://github.com/fmtlib/fmt/pull/3661, https://github.com/fmtlib/fmt/issues/3673, https://github.com/fmtlib/fmt/pull/3677, https://github.com/fmtlib/fmt/pull/3737, https://github.com/fmtlib/fmt/issues/3742, https://github.com/fmtlib/fmt/pull/3744). Thanks @idzm, @perlun, @joycebrum, @fennewald, @reinhardt1053, @GeorgeLS. - Updated CI dependencies (https://github.com/fmtlib/fmt/pull/3615, https://github.com/fmtlib/fmt/pull/3622, https://github.com/fmtlib/fmt/pull/3623, https://github.com/fmtlib/fmt/pull/3666, https://github.com/fmtlib/fmt/pull/3696, https://github.com/fmtlib/fmt/pull/3697, https://github.com/fmtlib/fmt/pull/3759, https://github.com/fmtlib/fmt/pull/3782). # 10.1.1 - 2023-08-28 - Added formatters for `std::atomic` and `atomic_flag` (https://github.com/fmtlib/fmt/pull/3574, https://github.com/fmtlib/fmt/pull/3594). Thanks @wangzw and @AlexGuteniev. - Fixed an error about partial specialization of `formatter` after instantiation when compiled with gcc and C++20 (https://github.com/fmtlib/fmt/issues/3584). - Fixed compilation as a C++20 module with gcc and clang (https://github.com/fmtlib/fmt/issues/3587, https://github.com/fmtlib/fmt/pull/3597, https://github.com/fmtlib/fmt/pull/3605). Thanks @MathewBensonCode. - Made `fmt::to_string` work with types that have `format_as` overloads (https://github.com/fmtlib/fmt/pull/3575). Thanks @phprus. - Made `formatted_size` work with integral format specifiers at compile time (https://github.com/fmtlib/fmt/pull/3591). Thanks @elbeno. - Fixed a warning about the `no_unique_address` attribute on clang-cl (https://github.com/fmtlib/fmt/pull/3599). Thanks @lukester1975. - Improved compatibility with the legacy GBK encoding (https://github.com/fmtlib/fmt/issues/3598, https://github.com/fmtlib/fmt/pull/3599). Thanks @YuHuanTin. - Added OpenSSF Scorecard analysis (https://github.com/fmtlib/fmt/issues/3530, https://github.com/fmtlib/fmt/pull/3571). Thanks @joycebrum. - Updated CI dependencies (https://github.com/fmtlib/fmt/pull/3591, https://github.com/fmtlib/fmt/pull/3592, https://github.com/fmtlib/fmt/pull/3593, https://github.com/fmtlib/fmt/pull/3602). # 10.1.0 - 2023-08-12 - Optimized format string compilation resulting in up to 40% speed up in compiled `format_to` and \~4x speed up in compiled `format_to_n` on a concatenation benchmark (https://github.com/fmtlib/fmt/issues/3133, https://github.com/fmtlib/fmt/issues/3484). {fmt} 10.0: --------------------------------------------------------- Benchmark Time CPU Iterations --------------------------------------------------------- BM_format_to 78.9 ns 78.9 ns 8881746 BM_format_to_n 568 ns 568 ns 1232089 {fmt} 10.1: --------------------------------------------------------- Benchmark Time CPU Iterations --------------------------------------------------------- BM_format_to 54.9 ns 54.9 ns 12727944 BM_format_to_n 133 ns 133 ns 5257795 - Optimized storage of an empty allocator in `basic_memory_buffer` (https://github.com/fmtlib/fmt/pull/3485). Thanks @Minty-Meeo. - Added formatters for proxy references to elements of `std::vector` and `std::bitset` (https://github.com/fmtlib/fmt/issues/3567, https://github.com/fmtlib/fmt/pull/3570). For example ([godbolt](https://godbolt.org/z/zYb79Pvn8)): ```c++ #include #include int main() { auto v = std::vector{true}; fmt::print("{}", v[0]); } ``` Thanks @phprus and @felix642. - Fixed an ambiguous formatter specialization for containers that look like container adaptors such as `boost::flat_set` (https://github.com/fmtlib/fmt/issues/3556, https://github.com/fmtlib/fmt/pull/3561). Thanks @5chmidti. - Fixed compilation when formatting durations not convertible from `std::chrono::seconds` (https://github.com/fmtlib/fmt/pull/3430). Thanks @patlkli. - Made the `formatter` specialization for `char*` const-correct (https://github.com/fmtlib/fmt/pull/3432). Thanks @timsong-cpp. - Made `{}` and `{:}` handled consistently during compile-time checks (https://github.com/fmtlib/fmt/issues/3526). - Disallowed passing temporaries to `make_format_args` to improve API safety by preventing dangling references. - Improved the compile-time error for unformattable types (https://github.com/fmtlib/fmt/pull/3478). Thanks @BRevzin. - Improved the floating-point formatter (https://github.com/fmtlib/fmt/pull/3448, https://github.com/fmtlib/fmt/pull/3450). Thanks @florimond-collette. - Fixed handling of precision for `long double` larger than 64 bits. (https://github.com/fmtlib/fmt/issues/3539, https://github.com/fmtlib/fmt/issues/3564). - Made floating-point and chrono tests less platform-dependent (https://github.com/fmtlib/fmt/issues/3337, https://github.com/fmtlib/fmt/issues/3433, https://github.com/fmtlib/fmt/pull/3434). Thanks @phprus. - Removed the remnants of the Grisu floating-point formatter that has been replaced by Dragonbox in earlier versions. - Added `throw_format_error` to the public API (https://github.com/fmtlib/fmt/pull/3551). Thanks @mjerabek. - Made `FMT_THROW` assert even if assertions are disabled when compiling with exceptions disabled (https://github.com/fmtlib/fmt/issues/3418, https://github.com/fmtlib/fmt/pull/3439). Thanks @BRevzin. - Made `format_as` and `std::filesystem::path` formatter work with exotic code unit types. (https://github.com/fmtlib/fmt/pull/3457, https://github.com/fmtlib/fmt/pull/3476). Thanks @gix and @hmbj. - Added support for the `?` format specifier to `std::filesystem::path` and made the default unescaped for consistency with strings. - Deprecated the wide stream overload of `printf`. - Removed unused `basic_printf_parse_context`. - Improved RTTI detection used when formatting exceptions (https://github.com/fmtlib/fmt/pull/3468). Thanks @danakj. - Improved compatibility with VxWorks7 (https://github.com/fmtlib/fmt/pull/3467). Thanks @wenshan1. - Improved documentation (https://github.com/fmtlib/fmt/issues/3174, https://github.com/fmtlib/fmt/issues/3423, https://github.com/fmtlib/fmt/pull/3454, https://github.com/fmtlib/fmt/issues/3458, https://github.com/fmtlib/fmt/pull/3461, https://github.com/fmtlib/fmt/issues/3487, https://github.com/fmtlib/fmt/pull/3515). Thanks @zencatalyst, @rlalik and @mikecrowe. - Improved build and CI configurations (https://github.com/fmtlib/fmt/issues/3449, https://github.com/fmtlib/fmt/pull/3451, https://github.com/fmtlib/fmt/pull/3452, https://github.com/fmtlib/fmt/pull/3453, https://github.com/fmtlib/fmt/pull/3459, https://github.com/fmtlib/fmt/issues/3481, https://github.com/fmtlib/fmt/pull/3486, https://github.com/fmtlib/fmt/issues/3489, https://github.com/fmtlib/fmt/pull/3496, https://github.com/fmtlib/fmt/issues/3517, https://github.com/fmtlib/fmt/pull/3523, https://github.com/fmtlib/fmt/pull/3563). Thanks @joycebrum, @glebm, @phprus, @petrmanek, @setoye and @abouvier. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/3408, https://github.com/fmtlib/fmt/issues/3424, https://github.com/fmtlib/fmt/issues/3444, https://github.com/fmtlib/fmt/pull/3446, https://github.com/fmtlib/fmt/pull/3475, https://github.com/fmtlib/fmt/pull/3482, https://github.com/fmtlib/fmt/issues/3492, https://github.com/fmtlib/fmt/pull/3493, https://github.com/fmtlib/fmt/pull/3508, https://github.com/fmtlib/fmt/issues/3509, https://github.com/fmtlib/fmt/issues/3533, https://github.com/fmtlib/fmt/pull/3542, https://github.com/fmtlib/fmt/issues/3543, https://github.com/fmtlib/fmt/issues/3540, https://github.com/fmtlib/fmt/pull/3544, https://github.com/fmtlib/fmt/issues/3548, https://github.com/fmtlib/fmt/pull/3549, https://github.com/fmtlib/fmt/pull/3550, https://github.com/fmtlib/fmt/pull/3552). Thanks @adesitter, @hmbj, @Minty-Meeo, @phprus, @TobiSchluter, @kieranclancy, @alexeedm, @jurihock, @Ozomahtli and @razaqq. # 10.0.0 - 2023-05-09 - Replaced Grisu with a new floating-point formatting algorithm for given precision (https://github.com/fmtlib/fmt/issues/3262, https://github.com/fmtlib/fmt/issues/2750, https://github.com/fmtlib/fmt/pull/3269, https://github.com/fmtlib/fmt/pull/3276). The new algorithm is based on Dragonbox already used for the shortest representation and gives substantial performance improvement: ![](https://user-images.githubusercontent.com/33922675/211956670-84891a09-6867-47d9-82fc-3230da7abe0f.png) - Red: new algorithm - Green: new algorithm with `FMT_USE_FULL_CACHE_DRAGONBOX` defined to 1 - Blue: old algorithm Thanks @jk-jeon. - Replaced `snprintf`-based hex float formatter with an internal implementation (https://github.com/fmtlib/fmt/pull/3179, https://github.com/fmtlib/fmt/pull/3203). This removes the last usage of `s(n)printf` in {fmt}. Thanks @phprus. - Fixed alignment of floating-point numbers with localization (https://github.com/fmtlib/fmt/issues/3263, https://github.com/fmtlib/fmt/pull/3272). Thanks @ShawnZhong. - Made handling of `#` consistent with `std::format`. - Improved C++20 module support (https://github.com/fmtlib/fmt/pull/3134, https://github.com/fmtlib/fmt/pull/3254, https://github.com/fmtlib/fmt/pull/3386, https://github.com/fmtlib/fmt/pull/3387, https://github.com/fmtlib/fmt/pull/3388, https://github.com/fmtlib/fmt/pull/3392, https://github.com/fmtlib/fmt/pull/3397, https://github.com/fmtlib/fmt/pull/3399, https://github.com/fmtlib/fmt/pull/3400). Thanks @laitingsheng, @Orvid and @DanielaE. - Switched to the [modules CMake library](https://github.com/vitaut/modules) which allows building {fmt} as a C++20 module with clang: CXX=clang++ cmake -DFMT_MODULE=ON . make - Made `format_as` work with any user-defined type and not just enums. For example ([godbolt](https://godbolt.org/z/b7rqhq5Kh)): ```c++ #include struct floaty_mc_floatface { double value; }; auto format_as(floaty_mc_floatface f) { return f.value; } int main() { fmt::print("{:8}\n", floaty_mc_floatface{0.42}); // prints " 0.42" } ``` - Removed deprecated implicit conversions for enums and conversions to primitive types for compatibility with `std::format` and to prevent potential ODR violations. Use `format_as` instead. - Added support for fill, align and width to the time point formatter (https://github.com/fmtlib/fmt/issues/3237, https://github.com/fmtlib/fmt/pull/3260, https://github.com/fmtlib/fmt/pull/3275). For example ([godbolt](https://godbolt.org/z/rKP6MGz6c)): ```c++ #include int main() { // prints " 2023" fmt::print("{:>8%Y}\n", std::chrono::system_clock::now()); } ``` Thanks @ShawnZhong. - Implemented formatting of subseconds (https://github.com/fmtlib/fmt/issues/2207, https://github.com/fmtlib/fmt/issues/3117, https://github.com/fmtlib/fmt/pull/3115, https://github.com/fmtlib/fmt/pull/3143, https://github.com/fmtlib/fmt/pull/3144, https://github.com/fmtlib/fmt/pull/3349). For example ([godbolt](https://godbolt.org/z/45738oGEo)): ```c++ #include int main() { // prints 01.234567 fmt::print("{:%S}\n", std::chrono::microseconds(1234567)); } ``` Thanks @patrickroocks @phprus and @BRevzin. - Added precision support to `%S` (https://github.com/fmtlib/fmt/pull/3148). Thanks @SappyJoy - Added support for `std::utc_time` (https://github.com/fmtlib/fmt/issues/3098, https://github.com/fmtlib/fmt/pull/3110). Thanks @patrickroocks. - Switched formatting of `std::chrono::system_clock` from local time to UTC for compatibility with the standard (https://github.com/fmtlib/fmt/issues/3199, https://github.com/fmtlib/fmt/pull/3230). Thanks @ned14. - Added support for `%Ez` and `%Oz` to chrono formatters. (https://github.com/fmtlib/fmt/issues/3220, https://github.com/fmtlib/fmt/pull/3222). Thanks @phprus. - Improved validation of format specifiers for `std::chrono::duration` (https://github.com/fmtlib/fmt/issues/3219, https://github.com/fmtlib/fmt/pull/3232). Thanks @ShawnZhong. - Fixed formatting of time points before the epoch (https://github.com/fmtlib/fmt/issues/3117, https://github.com/fmtlib/fmt/pull/3261). For example ([godbolt](https://godbolt.org/z/f7bcznb3W)): ```c++ #include int main() { auto t = std::chrono::system_clock::from_time_t(0) - std::chrono::milliseconds(250); fmt::print("{:%S}\n", t); // prints 59.750000000 } ``` Thanks @ShawnZhong. - Experimental: implemented glibc extension for padding seconds, minutes and hours (https://github.com/fmtlib/fmt/issues/2959, https://github.com/fmtlib/fmt/pull/3271). Thanks @ShawnZhong. - Added a formatter for `std::exception` (https://github.com/fmtlib/fmt/issues/2977, https://github.com/fmtlib/fmt/issues/3012, https://github.com/fmtlib/fmt/pull/3062, https://github.com/fmtlib/fmt/pull/3076, https://github.com/fmtlib/fmt/pull/3119). For example ([godbolt](https://godbolt.org/z/8xoWGs9e4)): ```c++ #include #include int main() { try { std::vector().at(0); } catch(const std::exception& e) { fmt::print("{}", e); } } ``` prints: vector::_M_range_check: __n (which is 0) >= this->size() (which is 0) on libstdc++. Thanks @zach2good and @phprus. - Moved `std::error_code` formatter from `fmt/os.h` to `fmt/std.h`. (https://github.com/fmtlib/fmt/pull/3125). Thanks @phprus. - Added formatters for standard container adapters: `std::priority_queue`, `std::queue` and `std::stack` (https://github.com/fmtlib/fmt/issues/3215, https://github.com/fmtlib/fmt/pull/3279). For example ([godbolt](https://godbolt.org/z/74h1xY9qK)): ```c++ #include #include #include int main() { auto s = std::stack>(); for (auto b: {true, false, true}) s.push(b); fmt::print("{}\n", s); // prints [true, false, true] } ``` Thanks @ShawnZhong. - Added a formatter for `std::optional` to `fmt/std.h` (https://github.com/fmtlib/fmt/issues/1367, https://github.com/fmtlib/fmt/pull/3303). Thanks @tom-huntington. - Fixed formatting of valueless by exception variants (https://github.com/fmtlib/fmt/pull/3347). Thanks @TheOmegaCarrot. - Made `fmt::ptr` accept `unique_ptr` with a custom deleter (https://github.com/fmtlib/fmt/pull/3177). Thanks @hmbj. - Fixed formatting of noncopyable ranges and nested ranges of chars (https://github.com/fmtlib/fmt/pull/3158 https://github.com/fmtlib/fmt/issues/3286, https://github.com/fmtlib/fmt/pull/3290). Thanks @BRevzin. - Fixed issues with formatting of paths and ranges of paths (https://github.com/fmtlib/fmt/issues/3319, https://github.com/fmtlib/fmt/pull/3321 https://github.com/fmtlib/fmt/issues/3322). Thanks @phprus. - Improved handling of invalid Unicode in paths. - Enabled compile-time checks on Apple clang 14 and later (https://github.com/fmtlib/fmt/pull/3331). Thanks @cloyce. - Improved compile-time checks of named arguments (https://github.com/fmtlib/fmt/issues/3105, https://github.com/fmtlib/fmt/pull/3214). Thanks @rbrich. - Fixed formatting when both alignment and `0` are given (https://github.com/fmtlib/fmt/issues/3236, https://github.com/fmtlib/fmt/pull/3248). Thanks @ShawnZhong. - Improved Unicode support in the experimental file API on Windows (https://github.com/fmtlib/fmt/issues/3234, https://github.com/fmtlib/fmt/pull/3293). Thanks @Fros1er. - Unified UTF transcoding (https://github.com/fmtlib/fmt/pull/3416). Thanks @phprus. - Added support for UTF-8 digit separators via an experimental locale facet (https://github.com/fmtlib/fmt/issues/1861). For example ([godbolt](https://godbolt.org/z/f7bcznb3W)): ```c++ auto loc = std::locale( std::locale(), new fmt::format_facet("’")); auto s = fmt::format(loc, "{:L}", 1000); ``` where `’` is U+2019 used as a digit separator in the de_CH locale. - Added an overload of `formatted_size` that takes a locale (https://github.com/fmtlib/fmt/issues/3084, https://github.com/fmtlib/fmt/pull/3087). Thanks @gerboengels. - Removed the deprecated `FMT_DEPRECATED_OSTREAM`. - Fixed a UB when using a null `std::string_view` with `fmt::to_string` or format string compilation (https://github.com/fmtlib/fmt/issues/3241, https://github.com/fmtlib/fmt/pull/3244). Thanks @phprus. - Added `starts_with` to the fallback `string_view` implementation (https://github.com/fmtlib/fmt/pull/3080). Thanks @phprus. - Added `fmt::basic_format_string::get()` for compatibility with `basic_format_string` (https://github.com/fmtlib/fmt/pull/3111). Thanks @huangqinjin. - Added `println` for compatibility with C++23 (https://github.com/fmtlib/fmt/pull/3267). Thanks @ShawnZhong. - Renamed the `FMT_EXPORT` macro for shared library usage to `FMT_LIB_EXPORT`. - Improved documentation (https://github.com/fmtlib/fmt/issues/3108, https://github.com/fmtlib/fmt/issues/3169, https://github.com/fmtlib/fmt/pull/3243). https://github.com/fmtlib/fmt/pull/3404, https://github.com/fmtlib/fmt/pull/4002). Thanks @Cleroth, @Vertexwahn and @yujincheng08. - Improved build configuration and tests (https://github.com/fmtlib/fmt/pull/3118, https://github.com/fmtlib/fmt/pull/3120, https://github.com/fmtlib/fmt/pull/3188, https://github.com/fmtlib/fmt/issues/3189, https://github.com/fmtlib/fmt/pull/3198, https://github.com/fmtlib/fmt/pull/3205, https://github.com/fmtlib/fmt/pull/3207, https://github.com/fmtlib/fmt/pull/3210, https://github.com/fmtlib/fmt/pull/3240, https://github.com/fmtlib/fmt/pull/3256, https://github.com/fmtlib/fmt/pull/3264, https://github.com/fmtlib/fmt/issues/3299, https://github.com/fmtlib/fmt/pull/3302, https://github.com/fmtlib/fmt/pull/3312, https://github.com/fmtlib/fmt/issues/3317, https://github.com/fmtlib/fmt/pull/3328, https://github.com/fmtlib/fmt/pull/3333, https://github.com/fmtlib/fmt/pull/3369, https://github.com/fmtlib/fmt/issues/3373, https://github.com/fmtlib/fmt/pull/3395, https://github.com/fmtlib/fmt/pull/3406, https://github.com/fmtlib/fmt/pull/3411). Thanks @dimztimz, @phprus, @DavidKorczynski, @ChrisThrasher, @FrancoisCarouge, @kennyweiss, @luzpaz, @codeinred, @Mixaill, @joycebrum, @kevinhwang and @Vertexwahn. - Fixed a regression in handling empty format specifiers after a colon (`{:}`) (https://github.com/fmtlib/fmt/pull/3086). Thanks @oxidase. - Worked around a broken implementation of `std::is_constant_evaluated` in some versions of libstdc++ on clang (https://github.com/fmtlib/fmt/issues/3247, https://github.com/fmtlib/fmt/pull/3281). Thanks @phprus. - Fixed formatting of volatile variables (https://github.com/fmtlib/fmt/pull/3068). - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/pull/3057, https://github.com/fmtlib/fmt/pull/3066, https://github.com/fmtlib/fmt/pull/3072, https://github.com/fmtlib/fmt/pull/3082, https://github.com/fmtlib/fmt/pull/3091, https://github.com/fmtlib/fmt/issues/3092, https://github.com/fmtlib/fmt/pull/3093, https://github.com/fmtlib/fmt/pull/3095, https://github.com/fmtlib/fmt/issues/3096, https://github.com/fmtlib/fmt/pull/3097, https://github.com/fmtlib/fmt/issues/3128, https://github.com/fmtlib/fmt/pull/3129, https://github.com/fmtlib/fmt/pull/3137, https://github.com/fmtlib/fmt/pull/3139, https://github.com/fmtlib/fmt/issues/3140, https://github.com/fmtlib/fmt/pull/3142, https://github.com/fmtlib/fmt/issues/3149, https://github.com/fmtlib/fmt/pull/3150, https://github.com/fmtlib/fmt/issues/3154, https://github.com/fmtlib/fmt/issues/3163, https://github.com/fmtlib/fmt/issues/3178, https://github.com/fmtlib/fmt/pull/3184, https://github.com/fmtlib/fmt/pull/3196, https://github.com/fmtlib/fmt/issues/3204, https://github.com/fmtlib/fmt/pull/3206, https://github.com/fmtlib/fmt/pull/3208, https://github.com/fmtlib/fmt/issues/3213, https://github.com/fmtlib/fmt/pull/3216, https://github.com/fmtlib/fmt/issues/3224, https://github.com/fmtlib/fmt/issues/3226, https://github.com/fmtlib/fmt/issues/3228, https://github.com/fmtlib/fmt/pull/3229, https://github.com/fmtlib/fmt/pull/3259, https://github.com/fmtlib/fmt/issues/3274, https://github.com/fmtlib/fmt/issues/3287, https://github.com/fmtlib/fmt/pull/3288, https://github.com/fmtlib/fmt/issues/3292, https://github.com/fmtlib/fmt/pull/3295, https://github.com/fmtlib/fmt/pull/3296, https://github.com/fmtlib/fmt/issues/3298, https://github.com/fmtlib/fmt/issues/3325, https://github.com/fmtlib/fmt/pull/3326, https://github.com/fmtlib/fmt/issues/3334, https://github.com/fmtlib/fmt/issues/3342, https://github.com/fmtlib/fmt/pull/3343, https://github.com/fmtlib/fmt/issues/3351, https://github.com/fmtlib/fmt/pull/3352, https://github.com/fmtlib/fmt/pull/3362, https://github.com/fmtlib/fmt/issues/3365, https://github.com/fmtlib/fmt/pull/3366, https://github.com/fmtlib/fmt/pull/3374, https://github.com/fmtlib/fmt/issues/3377, https://github.com/fmtlib/fmt/pull/3378, https://github.com/fmtlib/fmt/issues/3381, https://github.com/fmtlib/fmt/pull/3398, https://github.com/fmtlib/fmt/pull/3413, https://github.com/fmtlib/fmt/issues/3415). Thanks @phprus, @gsjaardema, @NewbieOrange, @EngineLessCC, @asmaloney, @HazardyKnusperkeks, @sergiud, @Youw, @thesmurph, @czudziakm, @Roman-Koshelev, @chronoxor, @ShawnZhong, @russelltg, @glebm, @tmartin-gh, @Zhaojun-Liu, @louiswins and @mogemimi. # 9.1.0 - 2022-08-27 - `fmt::formatted_size` now works at compile time (https://github.com/fmtlib/fmt/pull/3026). For example ([godbolt](https://godbolt.org/z/1MW5rMdf8)): ```c++ #include int main() { using namespace fmt::literals; constexpr size_t n = fmt::formatted_size("{}"_cf, 42); fmt::print("{}\n", n); // prints 2 } ``` Thanks @marksantaniello. - Fixed handling of invalid UTF-8 (https://github.com/fmtlib/fmt/pull/3038, https://github.com/fmtlib/fmt/pull/3044, https://github.com/fmtlib/fmt/pull/3056). Thanks @phprus and @skeeto. - Improved Unicode support in `ostream` overloads of `print` (https://github.com/fmtlib/fmt/pull/2994, https://github.com/fmtlib/fmt/pull/3001, https://github.com/fmtlib/fmt/pull/3025). Thanks @dimztimz. - Fixed handling of the sign specifier in localized formatting on systems with 32-bit `wchar_t` (https://github.com/fmtlib/fmt/issues/3041). - Added support for wide streams to `fmt::streamed` (https://github.com/fmtlib/fmt/pull/2994). Thanks @phprus. - Added the `n` specifier that disables the output of delimiters when formatting ranges (https://github.com/fmtlib/fmt/pull/2981, https://github.com/fmtlib/fmt/pull/2983). For example ([godbolt](https://godbolt.org/z/roKqGdj8c)): ```c++ #include #include int main() { auto v = std::vector{1, 2, 3}; fmt::print("{:n}\n", v); // prints 1, 2, 3 } ``` Thanks @BRevzin. - Worked around problematic `std::string_view` constructors introduced in C++23 (https://github.com/fmtlib/fmt/issues/3030, https://github.com/fmtlib/fmt/issues/3050). Thanks @strega-nil-ms. - Improve handling (exclusion) of recursive ranges (https://github.com/fmtlib/fmt/issues/2968, https://github.com/fmtlib/fmt/pull/2974). Thanks @Dani-Hub. - Improved error reporting in format string compilation (https://github.com/fmtlib/fmt/issues/3055). - Improved the implementation of [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm used for the default floating-point formatting (https://github.com/fmtlib/fmt/pull/2984). Thanks @jk-jeon. - Fixed issues with floating-point formatting on exotic platforms. - Improved the implementation of chrono formatting (https://github.com/fmtlib/fmt/pull/3010). Thanks @phprus. - Improved documentation (https://github.com/fmtlib/fmt/pull/2966, https://github.com/fmtlib/fmt/pull/3009, https://github.com/fmtlib/fmt/issues/3020, https://github.com/fmtlib/fmt/pull/3037). Thanks @mwinterb, @jcelerier and @remiburtin. - Improved build configuration (https://github.com/fmtlib/fmt/pull/2991, https://github.com/fmtlib/fmt/pull/2995, https://github.com/fmtlib/fmt/issues/3004, https://github.com/fmtlib/fmt/pull/3007, https://github.com/fmtlib/fmt/pull/3040). Thanks @dimztimz and @hwhsu1231. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/2969, https://github.com/fmtlib/fmt/pull/2971, https://github.com/fmtlib/fmt/issues/2975, https://github.com/fmtlib/fmt/pull/2982, https://github.com/fmtlib/fmt/pull/2985, https://github.com/fmtlib/fmt/issues/2988, https://github.com/fmtlib/fmt/issues/2989, https://github.com/fmtlib/fmt/issues/3000, https://github.com/fmtlib/fmt/issues/3006, https://github.com/fmtlib/fmt/issues/3014, https://github.com/fmtlib/fmt/issues/3015, https://github.com/fmtlib/fmt/pull/3021, https://github.com/fmtlib/fmt/issues/3023, https://github.com/fmtlib/fmt/pull/3024, https://github.com/fmtlib/fmt/pull/3029, https://github.com/fmtlib/fmt/pull/3043, https://github.com/fmtlib/fmt/issues/3052, https://github.com/fmtlib/fmt/pull/3053, https://github.com/fmtlib/fmt/pull/3054). Thanks @h-friederich, @dimztimz, @olupton, @bernhardmgruber and @phprus. # 9.0.0 - 2022-07-04 - Switched to the internal floating point formatter for all decimal presentation formats. In particular this results in consistent rounding on all platforms and removing the `s[n]printf` fallback for decimal FP formatting. - Compile-time floating point formatting no longer requires the header-only mode. For example ([godbolt](https://godbolt.org/z/G37PTeG3b)): ```c++ #include #include consteval auto compile_time_dtoa(double value) -> std::array { auto result = std::array(); fmt::format_to(result.data(), FMT_COMPILE("{}"), value); return result; } constexpr auto answer = compile_time_dtoa(0.42); ``` works with the default settings. - Improved the implementation of [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm used for the default floating-point formatting (https://github.com/fmtlib/fmt/pull/2713, https://github.com/fmtlib/fmt/pull/2750). Thanks @jk-jeon. - Made `fmt::to_string` work with `__float128`. This uses the internal FP formatter and works even on system without `__float128` support in `[s]printf`. - Disabled automatic `std::ostream` insertion operator (`operator<<`) discovery when `fmt/ostream.h` is included to prevent ODR violations. You can get the old behavior by defining `FMT_DEPRECATED_OSTREAM` but this will be removed in the next major release. Use `fmt::streamed` or `fmt::ostream_formatter` to enable formatting via `std::ostream` instead. - Added `fmt::ostream_formatter` that can be used to write `formatter` specializations that perform formatting via `std::ostream`. For example ([godbolt](https://godbolt.org/z/5sEc5qMsf)): ```c++ #include struct date { int year, month, day; friend std::ostream& operator<<(std::ostream& os, const date& d) { return os << d.year << '-' << d.month << '-' << d.day; } }; template <> struct fmt::formatter : ostream_formatter {}; std::string s = fmt::format("The date is {}", date{2012, 12, 9}); // s == "The date is 2012-12-9" ``` - Added the `fmt::streamed` function that takes an object and formats it via `std::ostream`. For example ([godbolt](https://godbolt.org/z/5G3346G1f)): ```c++ #include #include int main() { fmt::print("Current thread id: {}\n", fmt::streamed(std::this_thread::get_id())); } ``` Note that `fmt/std.h` provides a `formatter` specialization for `std::thread::id` so you don\'t need to format it via `std::ostream`. - Deprecated implicit conversions of unscoped enums to integers for consistency with scoped enums. - Added an argument-dependent lookup based `format_as` extension API to simplify formatting of enums. - Added experimental `std::variant` formatting support (https://github.com/fmtlib/fmt/pull/2941). For example ([godbolt](https://godbolt.org/z/KG9z6cq68)): ```c++ #include #include int main() { auto v = std::variant(42); fmt::print("{}\n", v); } ``` prints: variant(42) Thanks @jehelset. - Added experimental `std::filesystem::path` formatting support (https://github.com/fmtlib/fmt/issues/2865, https://github.com/fmtlib/fmt/pull/2902, https://github.com/fmtlib/fmt/issues/2917, https://github.com/fmtlib/fmt/pull/2918). For example ([godbolt](https://godbolt.org/z/o44dMexEb)): ```c++ #include #include int main() { fmt::print("There is no place like {}.", std::filesystem::path("/home")); } ``` prints: There is no place like "/home". Thanks @phprus. - Added a `std::thread::id` formatter to `fmt/std.h`. For example ([godbolt](https://godbolt.org/z/j1azbYf3E)): ```c++ #include #include int main() { fmt::print("Current thread id: {}\n", std::this_thread::get_id()); } ``` - Added `fmt::styled` that applies a text style to an individual argument (https://github.com/fmtlib/fmt/pull/2793). For example ([godbolt](https://godbolt.org/z/vWGW7v5M6)): ```c++ #include #include int main() { auto now = std::chrono::system_clock::now(); fmt::print( "[{}] {}: {}\n", fmt::styled(now, fmt::emphasis::bold), fmt::styled("error", fg(fmt::color::red)), "something went wrong"); } ``` prints ![](https://user-images.githubusercontent.com/576385/175071215-12809244-dab0-4005-96d8-7cd911c964d5.png) Thanks @rbrugo. - Made `fmt::print` overload for text styles correctly handle UTF-8 (https://github.com/fmtlib/fmt/issues/2681, https://github.com/fmtlib/fmt/pull/2701). Thanks @AlexGuteniev. - Fixed Unicode handling when writing to an ostream. - Added support for nested specifiers to range formatting (https://github.com/fmtlib/fmt/pull/2673). For example ([godbolt](https://godbolt.org/z/xd3Gj38cf)): ```c++ #include #include int main() { fmt::print("{::#x}\n", std::vector{10, 20, 30}); } ``` prints `[0xa, 0x14, 0x1e]`. Thanks @BRevzin. - Implemented escaping of wide strings in ranges (https://github.com/fmtlib/fmt/pull/2904). Thanks @phprus. - Added support for ranges with `begin` / `end` found via the argument-dependent lookup (https://github.com/fmtlib/fmt/pull/2807). Thanks @rbrugo. - Fixed formatting of certain kinds of ranges of ranges (https://github.com/fmtlib/fmt/pull/2787). Thanks @BRevzin. - Fixed handling of maps with element types other than `std::pair` (https://github.com/fmtlib/fmt/pull/2944). Thanks @BrukerJWD. - Made tuple formatter enabled only if elements are formattable (https://github.com/fmtlib/fmt/issues/2939, https://github.com/fmtlib/fmt/pull/2940). Thanks @jehelset. - Made `fmt::join` compatible with format string compilation (https://github.com/fmtlib/fmt/issues/2719, https://github.com/fmtlib/fmt/pull/2720). Thanks @phprus. - Made compile-time checks work with named arguments of custom types and `std::ostream` `print` overloads (https://github.com/fmtlib/fmt/issues/2816, https://github.com/fmtlib/fmt/issues/2817, https://github.com/fmtlib/fmt/pull/2819). Thanks @timsong-cpp. - Removed `make_args_checked` because it is no longer needed for compile-time checks (https://github.com/fmtlib/fmt/pull/2760). Thanks @phprus. - Removed the following deprecated APIs: `_format`, `arg_join`, the `format_to` overload that takes a memory buffer, `[v]fprintf` that takes an `ostream`. - Removed the deprecated implicit conversion of `[const] signed char*` and `[const] unsigned char*` to C strings. - Removed the deprecated `fmt/locale.h`. - Replaced the deprecated `fileno()` with `descriptor()` in `buffered_file`. - Moved `to_string_view` to the `detail` namespace since it\'s an implementation detail. - Made access mode of a created file consistent with `fopen` by setting `S_IWGRP` and `S_IWOTH` (https://github.com/fmtlib/fmt/pull/2733). Thanks @arogge. - Removed a redundant buffer resize when formatting to `std::ostream` (https://github.com/fmtlib/fmt/issues/2842, https://github.com/fmtlib/fmt/pull/2843). Thanks @jcelerier. - Made precision computation for strings consistent with width (https://github.com/fmtlib/fmt/issues/2888). - Fixed handling of locale separators in floating point formatting (https://github.com/fmtlib/fmt/issues/2830). - Made sign specifiers work with `__int128_t` (https://github.com/fmtlib/fmt/issues/2773). - Improved support for systems such as CHERI with extra data stored in pointers (https://github.com/fmtlib/fmt/pull/2932). Thanks @davidchisnall. - Improved documentation (https://github.com/fmtlib/fmt/pull/2706, https://github.com/fmtlib/fmt/pull/2712, https://github.com/fmtlib/fmt/pull/2789, https://github.com/fmtlib/fmt/pull/2803, https://github.com/fmtlib/fmt/pull/2805, https://github.com/fmtlib/fmt/pull/2815, https://github.com/fmtlib/fmt/pull/2924). Thanks @BRevzin, @Pokechu22, @setoye, @rtobar, @rbrugo, @anoonD and @leha-bot. - Improved build configuration (https://github.com/fmtlib/fmt/pull/2766, https://github.com/fmtlib/fmt/pull/2772, https://github.com/fmtlib/fmt/pull/2836, https://github.com/fmtlib/fmt/pull/2852, https://github.com/fmtlib/fmt/pull/2907, https://github.com/fmtlib/fmt/pull/2913, https://github.com/fmtlib/fmt/pull/2914). Thanks @kambala-decapitator, @mattiasljungstrom, @kieselnb, @nathannaveen and @Vertexwahn. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/2408, https://github.com/fmtlib/fmt/issues/2507, https://github.com/fmtlib/fmt/issues/2697, https://github.com/fmtlib/fmt/issues/2715, https://github.com/fmtlib/fmt/issues/2717, https://github.com/fmtlib/fmt/pull/2722, https://github.com/fmtlib/fmt/pull/2724, https://github.com/fmtlib/fmt/pull/2725, https://github.com/fmtlib/fmt/issues/2726, https://github.com/fmtlib/fmt/pull/2728, https://github.com/fmtlib/fmt/pull/2732, https://github.com/fmtlib/fmt/issues/2738, https://github.com/fmtlib/fmt/pull/2742, https://github.com/fmtlib/fmt/issues/2744, https://github.com/fmtlib/fmt/issues/2745, https://github.com/fmtlib/fmt/issues/2746, https://github.com/fmtlib/fmt/issues/2754, https://github.com/fmtlib/fmt/pull/2755, https://github.com/fmtlib/fmt/issues/2757, https://github.com/fmtlib/fmt/pull/2758, https://github.com/fmtlib/fmt/issues/2761, https://github.com/fmtlib/fmt/pull/2762, https://github.com/fmtlib/fmt/issues/2763, https://github.com/fmtlib/fmt/pull/2765, https://github.com/fmtlib/fmt/issues/2769, https://github.com/fmtlib/fmt/pull/2770, https://github.com/fmtlib/fmt/issues/2771, https://github.com/fmtlib/fmt/issues/2777, https://github.com/fmtlib/fmt/pull/2779, https://github.com/fmtlib/fmt/pull/2782, https://github.com/fmtlib/fmt/pull/2783, https://github.com/fmtlib/fmt/issues/2794, https://github.com/fmtlib/fmt/issues/2796, https://github.com/fmtlib/fmt/pull/2797, https://github.com/fmtlib/fmt/pull/2801, https://github.com/fmtlib/fmt/pull/2802, https://github.com/fmtlib/fmt/issues/2808, https://github.com/fmtlib/fmt/issues/2818, https://github.com/fmtlib/fmt/pull/2819, https://github.com/fmtlib/fmt/issues/2829, https://github.com/fmtlib/fmt/issues/2835, https://github.com/fmtlib/fmt/issues/2848, https://github.com/fmtlib/fmt/issues/2860, https://github.com/fmtlib/fmt/pull/2861, https://github.com/fmtlib/fmt/pull/2882, https://github.com/fmtlib/fmt/issues/2886, https://github.com/fmtlib/fmt/issues/2891, https://github.com/fmtlib/fmt/pull/2892, https://github.com/fmtlib/fmt/issues/2895, https://github.com/fmtlib/fmt/issues/2896, https://github.com/fmtlib/fmt/pull/2903, https://github.com/fmtlib/fmt/issues/2906, https://github.com/fmtlib/fmt/issues/2908, https://github.com/fmtlib/fmt/pull/2909, https://github.com/fmtlib/fmt/issues/2920, https://github.com/fmtlib/fmt/pull/2922, https://github.com/fmtlib/fmt/pull/2927, https://github.com/fmtlib/fmt/pull/2929, https://github.com/fmtlib/fmt/issues/2936, https://github.com/fmtlib/fmt/pull/2937, https://github.com/fmtlib/fmt/pull/2938, https://github.com/fmtlib/fmt/pull/2951, https://github.com/fmtlib/fmt/issues/2954, https://github.com/fmtlib/fmt/pull/2957, https://github.com/fmtlib/fmt/issues/2958, https://github.com/fmtlib/fmt/pull/2960). Thanks @matrackif @Tobi823, @ivan-volnov, @VasiliPupkin256, @federico-busato, @barcharcraz, @jk-jeon, @HazardyKnusperkeks, @dalboris, @seanm, @gsjaardema, @timsong-cpp, @seanm, @frithrah, @chronoxor, @Agga, @madmaxoft, @JurajX, @phprus and @Dani-Hub. # 8.1.1 - 2022-01-06 - Restored ABI compatibility with version 8.0.x (https://github.com/fmtlib/fmt/issues/2695, https://github.com/fmtlib/fmt/pull/2696). Thanks @saraedum. - Fixed chrono formatting on big endian systems (https://github.com/fmtlib/fmt/issues/2698, https://github.com/fmtlib/fmt/pull/2699). Thanks @phprus and @xvitaly. - Fixed a linkage error with mingw (https://github.com/fmtlib/fmt/issues/2691, https://github.com/fmtlib/fmt/pull/2692). Thanks @rbberger. # 8.1.0 - 2022-01-02 - Optimized chrono formatting (https://github.com/fmtlib/fmt/pull/2500, https://github.com/fmtlib/fmt/pull/2537, https://github.com/fmtlib/fmt/issues/2541, https://github.com/fmtlib/fmt/pull/2544, https://github.com/fmtlib/fmt/pull/2550, https://github.com/fmtlib/fmt/pull/2551, https://github.com/fmtlib/fmt/pull/2576, https://github.com/fmtlib/fmt/issues/2577, https://github.com/fmtlib/fmt/pull/2586, https://github.com/fmtlib/fmt/pull/2591, https://github.com/fmtlib/fmt/pull/2594, https://github.com/fmtlib/fmt/pull/2602, https://github.com/fmtlib/fmt/pull/2617, https://github.com/fmtlib/fmt/issues/2628, https://github.com/fmtlib/fmt/pull/2633, https://github.com/fmtlib/fmt/issues/2670, https://github.com/fmtlib/fmt/pull/2671). Processing of some specifiers such as `%z` and `%Y` is now up to 10-20 times faster, for example on GCC 11 with libstdc++: ---------------------------------------------------------------------------- Benchmark Before After ---------------------------------------------------------------------------- FMTFormatter_z 261 ns 26.3 ns FMTFormatterCompile_z 246 ns 11.6 ns FMTFormatter_Y 263 ns 26.1 ns FMTFormatterCompile_Y 244 ns 10.5 ns ---------------------------------------------------------------------------- Thanks @phprus and @toughengineer. - Implemented subsecond formatting for chrono durations (https://github.com/fmtlib/fmt/pull/2623). For example ([godbolt](https://godbolt.org/z/es7vWTETe)): ```c++ #include int main() { fmt::print("{:%S}", std::chrono::milliseconds(1234)); } ``` prints \"01.234\". Thanks @matrackif. - Fixed handling of precision 0 when formatting chrono durations (https://github.com/fmtlib/fmt/issues/2587, https://github.com/fmtlib/fmt/pull/2588). Thanks @lukester1975. - Fixed an overflow on invalid inputs in the `tm` formatter (https://github.com/fmtlib/fmt/pull/2564). Thanks @phprus. - Added `fmt::group_digits` that formats integers with a non-localized digit separator (comma) for groups of three digits. For example ([godbolt](https://godbolt.org/z/TxGxG9Poq)): ```c++ #include int main() { fmt::print("{} dollars", fmt::group_digits(1000000)); } ``` prints \"1,000,000 dollars\". - Added support for faint, conceal, reverse and blink text styles (https://github.com/fmtlib/fmt/pull/2394): Thanks @benit8 and @data-man. - Added experimental support for compile-time floating point formatting (https://github.com/fmtlib/fmt/pull/2426, https://github.com/fmtlib/fmt/pull/2470). It is currently limited to the header-only mode. Thanks @alexezeder. - Added UDL-based named argument support to compile-time format string checks (https://github.com/fmtlib/fmt/issues/2640, https://github.com/fmtlib/fmt/pull/2649). For example ([godbolt](https://godbolt.org/z/ohGbbvonv)): ```c++ #include int main() { using namespace fmt::literals; fmt::print("{answer:s}", "answer"_a=42); } ``` gives a compile-time error on compilers with C++20 `consteval` and non-type template parameter support (gcc 10+) because `s` is not a valid format specifier for an integer. Thanks @alexezeder. - Implemented escaping of string range elements. For example ([godbolt](https://godbolt.org/z/rKvM1vKf3)): ```c++ #include #include int main() { fmt::print("{}", std::vector{"\naan"}); } ``` is now printed as: ["\naan"] instead of: [" aan"] - Added an experimental `?` specifier for escaping strings. (https://github.com/fmtlib/fmt/pull/2674). Thanks @BRevzin. - Switched to JSON-like representation of maps and sets for consistency with Python\'s `str.format`. For example ([godbolt](https://godbolt.org/z/seKjoY9W5)): ```c++ #include #include int main() { fmt::print("{}", std::map{{"answer", 42}}); } ``` is now printed as: {"answer": 42} - Extended `fmt::join` to support C++20-only ranges (https://github.com/fmtlib/fmt/pull/2549). Thanks @BRevzin. - Optimized handling of non-const-iterable ranges and implemented initial support for non-const-formattable types. - Disabled implicit conversions of scoped enums to integers that was accidentally introduced in earlier versions (https://github.com/fmtlib/fmt/pull/1841). - Deprecated implicit conversion of `[const] signed char*` and `[const] unsigned char*` to C strings. - Deprecated `_format`, a legacy UDL-based format API (https://github.com/fmtlib/fmt/pull/2646). Thanks @alexezeder. - Marked `format`, `formatted_size` and `to_string` as `[[nodiscard]]` (https://github.com/fmtlib/fmt/pull/2612). @0x8000-0000. - Added missing diagnostic when trying to format function and member pointers as well as objects convertible to pointers which is explicitly disallowed (https://github.com/fmtlib/fmt/issues/2598, https://github.com/fmtlib/fmt/pull/2609, https://github.com/fmtlib/fmt/pull/2610). Thanks @AlexGuteniev. - Optimized writing to a contiguous buffer with `format_to_n` (https://github.com/fmtlib/fmt/pull/2489). Thanks @Roman-Koshelev. - Optimized writing to non-`char` buffers (https://github.com/fmtlib/fmt/pull/2477). Thanks @Roman-Koshelev. - Decimal point is now localized when using the `L` specifier. - Improved floating point formatter implementation (https://github.com/fmtlib/fmt/pull/2498, https://github.com/fmtlib/fmt/pull/2499). Thanks @Roman-Koshelev. - Fixed handling of very large precision in fixed format (https://github.com/fmtlib/fmt/pull/2616). - Made a table of cached powers used in FP formatting static (https://github.com/fmtlib/fmt/pull/2509). Thanks @jk-jeon. - Resolved a lookup ambiguity with C++20 format-related functions due to ADL (https://github.com/fmtlib/fmt/issues/2639, https://github.com/fmtlib/fmt/pull/2641). Thanks @mkurdej. - Removed unnecessary inline namespace qualification (https://github.com/fmtlib/fmt/issues/2642, https://github.com/fmtlib/fmt/pull/2643). Thanks @mkurdej. - Implemented argument forwarding in `format_to_n` (https://github.com/fmtlib/fmt/issues/2462, https://github.com/fmtlib/fmt/pull/2463). Thanks @owent. - Fixed handling of implicit conversions in `fmt::to_string` and format string compilation (https://github.com/fmtlib/fmt/issues/2565). - Changed the default access mode of files created by `fmt::output_file` to `-rw-r--r--` for consistency with `fopen` (https://github.com/fmtlib/fmt/issues/2530). - Make `fmt::ostream::flush` public (https://github.com/fmtlib/fmt/issues/2435). - Improved C++14/17 attribute detection (https://github.com/fmtlib/fmt/pull/2615). Thanks @AlexGuteniev. - Improved `consteval` detection for MSVC (https://github.com/fmtlib/fmt/pull/2559). Thanks @DanielaE. - Improved documentation (https://github.com/fmtlib/fmt/issues/2406, https://github.com/fmtlib/fmt/pull/2446, https://github.com/fmtlib/fmt/issues/2493, https://github.com/fmtlib/fmt/issues/2513, https://github.com/fmtlib/fmt/pull/2515, https://github.com/fmtlib/fmt/issues/2522, https://github.com/fmtlib/fmt/pull/2562, https://github.com/fmtlib/fmt/pull/2575, https://github.com/fmtlib/fmt/pull/2606, https://github.com/fmtlib/fmt/pull/2620, https://github.com/fmtlib/fmt/issues/2676). Thanks @sobolevn, @UnePierre, @zhsj, @phprus, @ericcurtin and @Lounarok. - Improved fuzzers and added a fuzzer for chrono timepoint formatting (https://github.com/fmtlib/fmt/pull/2461, https://github.com/fmtlib/fmt/pull/2469). @pauldreik, - Added the `FMT_SYSTEM_HEADERS` CMake option setting which marks {fmt}\'s headers as system. It can be used to suppress warnings (https://github.com/fmtlib/fmt/issues/2644, https://github.com/fmtlib/fmt/pull/2651). Thanks @alexezeder. - Added the Bazel build system support (https://github.com/fmtlib/fmt/pull/2505, https://github.com/fmtlib/fmt/pull/2516). Thanks @Vertexwahn. - Improved build configuration and tests (https://github.com/fmtlib/fmt/issues/2437, https://github.com/fmtlib/fmt/pull/2558, https://github.com/fmtlib/fmt/pull/2648, https://github.com/fmtlib/fmt/pull/2650, https://github.com/fmtlib/fmt/pull/2663, https://github.com/fmtlib/fmt/pull/2677). Thanks @DanielaE, @alexezeder and @phprus. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/pull/2353, https://github.com/fmtlib/fmt/pull/2356, https://github.com/fmtlib/fmt/pull/2399, https://github.com/fmtlib/fmt/issues/2408, https://github.com/fmtlib/fmt/pull/2414, https://github.com/fmtlib/fmt/pull/2427, https://github.com/fmtlib/fmt/pull/2432, https://github.com/fmtlib/fmt/pull/2442, https://github.com/fmtlib/fmt/pull/2434, https://github.com/fmtlib/fmt/issues/2439, https://github.com/fmtlib/fmt/pull/2447, https://github.com/fmtlib/fmt/pull/2450, https://github.com/fmtlib/fmt/issues/2455, https://github.com/fmtlib/fmt/issues/2465, https://github.com/fmtlib/fmt/issues/2472, https://github.com/fmtlib/fmt/issues/2474, https://github.com/fmtlib/fmt/pull/2476, https://github.com/fmtlib/fmt/issues/2478, https://github.com/fmtlib/fmt/issues/2479, https://github.com/fmtlib/fmt/issues/2481, https://github.com/fmtlib/fmt/pull/2482, https://github.com/fmtlib/fmt/pull/2483, https://github.com/fmtlib/fmt/issues/2490, https://github.com/fmtlib/fmt/pull/2491, https://github.com/fmtlib/fmt/pull/2510, https://github.com/fmtlib/fmt/pull/2518, https://github.com/fmtlib/fmt/issues/2528, https://github.com/fmtlib/fmt/pull/2529, https://github.com/fmtlib/fmt/pull/2539, https://github.com/fmtlib/fmt/issues/2540, https://github.com/fmtlib/fmt/pull/2545, https://github.com/fmtlib/fmt/pull/2555, https://github.com/fmtlib/fmt/issues/2557, https://github.com/fmtlib/fmt/issues/2570, https://github.com/fmtlib/fmt/pull/2573, https://github.com/fmtlib/fmt/pull/2582, https://github.com/fmtlib/fmt/issues/2605, https://github.com/fmtlib/fmt/pull/2611, https://github.com/fmtlib/fmt/pull/2647, https://github.com/fmtlib/fmt/issues/2627, https://github.com/fmtlib/fmt/pull/2630, https://github.com/fmtlib/fmt/issues/2635, https://github.com/fmtlib/fmt/issues/2638, https://github.com/fmtlib/fmt/issues/2653, https://github.com/fmtlib/fmt/issues/2654, https://github.com/fmtlib/fmt/issues/2661, https://github.com/fmtlib/fmt/pull/2664, https://github.com/fmtlib/fmt/pull/2684). Thanks @DanielaE, @mwinterb, @cdacamar, @TrebledJ, @bodomartin, @cquammen, @white238, @mmarkeloff, @palacaze, @jcelerier, @mborn-adi, @BrukerJWD, @spyridon97, @phprus, @oliverlee, @joshessman-llnl, @akohlmey, @timkalu, @olupton, @Acretock, @alexezeder, @andrewcorrigan, @lucpelletier and @HazardyKnusperkeks. # 8.0.1 - 2021-07-02 - Fixed the version number in the inline namespace (https://github.com/fmtlib/fmt/issues/2374). - Added a missing presentation type check for `std::string` (https://github.com/fmtlib/fmt/issues/2402). - Fixed a linkage error when mixing code built with clang and gcc (https://github.com/fmtlib/fmt/issues/2377). - Fixed documentation issues (https://github.com/fmtlib/fmt/pull/2396, https://github.com/fmtlib/fmt/issues/2403, https://github.com/fmtlib/fmt/issues/2406). Thanks @mkurdej. - Removed dead code in FP formatter ( https://github.com/fmtlib/fmt/pull/2398). Thanks @javierhonduco. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/2351, https://github.com/fmtlib/fmt/issues/2359, https://github.com/fmtlib/fmt/pull/2365, https://github.com/fmtlib/fmt/issues/2368, https://github.com/fmtlib/fmt/pull/2370, https://github.com/fmtlib/fmt/pull/2376, https://github.com/fmtlib/fmt/pull/2381, https://github.com/fmtlib/fmt/pull/2382, https://github.com/fmtlib/fmt/issues/2386, https://github.com/fmtlib/fmt/pull/2389, https://github.com/fmtlib/fmt/pull/2395, https://github.com/fmtlib/fmt/pull/2397, https://github.com/fmtlib/fmt/issues/2400, https://github.com/fmtlib/fmt/issues/2401, https://github.com/fmtlib/fmt/pull/2407). Thanks @zx2c4, @AidanSun05, @mattiasljungstrom, @joemmett, @erengy, @patlkli, @gsjaardema and @phprus. # 8.0.0 - 2021-06-21 - Enabled compile-time format string checks by default. For example ([godbolt](https://godbolt.org/z/sMxcohGjz)): ```c++ #include int main() { fmt::print("{:d}", "I am not a number"); } ``` gives a compile-time error on compilers with C++20 `consteval` support (gcc 10+, clang 11+) because `d` is not a valid format specifier for a string. To pass a runtime string wrap it in `fmt::runtime`: ```c++ fmt::print(fmt::runtime("{:d}"), "I am not a number"); ``` - Added compile-time formatting (https://github.com/fmtlib/fmt/pull/2019, https://github.com/fmtlib/fmt/pull/2044, https://github.com/fmtlib/fmt/pull/2056, https://github.com/fmtlib/fmt/pull/2072, https://github.com/fmtlib/fmt/pull/2075, https://github.com/fmtlib/fmt/issues/2078, https://github.com/fmtlib/fmt/pull/2129, https://github.com/fmtlib/fmt/pull/2326). For example ([godbolt](https://godbolt.org/z/Mxx9d89jM)): ```c++ #include consteval auto compile_time_itoa(int value) -> std::array { auto result = std::array(); fmt::format_to(result.data(), FMT_COMPILE("{}"), value); return result; } constexpr auto answer = compile_time_itoa(42); ``` Most of the formatting functionality is available at compile time with a notable exception of floating-point numbers and pointers. Thanks @alexezeder. - Optimized handling of format specifiers during format string compilation. For example, hexadecimal formatting (`"{:x}"`) is now 3-7x faster than before when using `format_to` with format string compilation and a stack-allocated buffer (https://github.com/fmtlib/fmt/issues/1944). Before (7.1.3): ---------------------------------------------------------------------------- Benchmark Time CPU Iterations ---------------------------------------------------------------------------- FMTCompileOld/0 15.5 ns 15.5 ns 43302898 FMTCompileOld/42 16.6 ns 16.6 ns 43278267 FMTCompileOld/273123 18.7 ns 18.6 ns 37035861 FMTCompileOld/9223372036854775807 19.4 ns 19.4 ns 35243000 ---------------------------------------------------------------------------- After (8.x): ---------------------------------------------------------------------------- Benchmark Time CPU Iterations ---------------------------------------------------------------------------- FMTCompileNew/0 1.99 ns 1.99 ns 360523686 FMTCompileNew/42 2.33 ns 2.33 ns 279865664 FMTCompileNew/273123 3.72 ns 3.71 ns 190230315 FMTCompileNew/9223372036854775807 5.28 ns 5.26 ns 130711631 ---------------------------------------------------------------------------- It is even faster than `std::to_chars` from libc++ compiled with clang on macOS: ---------------------------------------------------------------------------- Benchmark Time CPU Iterations ---------------------------------------------------------------------------- ToChars/0 4.42 ns 4.41 ns 160196630 ToChars/42 5.00 ns 4.98 ns 140735201 ToChars/273123 7.26 ns 7.24 ns 95784130 ToChars/9223372036854775807 8.77 ns 8.75 ns 75872534 ---------------------------------------------------------------------------- In other cases, especially involving `std::string` construction, the speed up is usually lower because handling format specifiers takes a smaller fraction of the total time. - Added the `_cf` user-defined literal to represent a compiled format string. It can be used instead of the `FMT_COMPILE` macro (https://github.com/fmtlib/fmt/pull/2043, https://github.com/fmtlib/fmt/pull/2242): ```c++ #include using namespace fmt::literals; auto s = fmt::format(FMT_COMPILE("{}"), 42); // πŸ™ not modern auto s = fmt::format("{}"_cf, 42); // πŸ™‚ modern as hell ``` It requires compiler support for class types in non-type template parameters (a C++20 feature) which is available in GCC 9.3+. Thanks @alexezeder. - Format string compilation now requires `format` functions of `formatter` specializations for user-defined types to be `const`: ```c++ template <> struct fmt::formatter: formatter { template auto format(my_type obj, FormatContext& ctx) const { // Note const here. // ... } }; ``` - Added UDL-based named argument support to format string compilation (https://github.com/fmtlib/fmt/pull/2243, https://github.com/fmtlib/fmt/pull/2281). For example: ```c++ #include using namespace fmt::literals; auto s = fmt::format(FMT_COMPILE("{answer}"), "answer"_a = 42); ``` Here the argument named \"answer\" is resolved at compile time with no runtime overhead. Thanks @alexezeder. - Added format string compilation support to `fmt::print` (https://github.com/fmtlib/fmt/issues/2280, https://github.com/fmtlib/fmt/pull/2304). Thanks @alexezeder. - Added initial support for compiling {fmt} as a C++20 module (https://github.com/fmtlib/fmt/pull/2235, https://github.com/fmtlib/fmt/pull/2240, https://github.com/fmtlib/fmt/pull/2260, https://github.com/fmtlib/fmt/pull/2282, https://github.com/fmtlib/fmt/pull/2283, https://github.com/fmtlib/fmt/pull/2288, https://github.com/fmtlib/fmt/pull/2298, https://github.com/fmtlib/fmt/pull/2306, https://github.com/fmtlib/fmt/pull/2307, https://github.com/fmtlib/fmt/pull/2309, https://github.com/fmtlib/fmt/pull/2318, https://github.com/fmtlib/fmt/pull/2324, https://github.com/fmtlib/fmt/pull/2332, https://github.com/fmtlib/fmt/pull/2340). Thanks @DanielaE. - Made symbols private by default reducing shared library size (https://github.com/fmtlib/fmt/pull/2301). For example there was a \~15% reported reduction on one platform. Thanks @sergiud. - Optimized includes making the result of preprocessing `fmt/format.h` \~20% smaller with libstdc++/C++20 and slightly improving build times (https://github.com/fmtlib/fmt/issues/1998). - Added support of ranges with non-const `begin` / `end` (https://github.com/fmtlib/fmt/pull/1953). Thanks @kitegi. - Added support of `std::byte` and other formattable types to `fmt::join` (https://github.com/fmtlib/fmt/issues/1981, https://github.com/fmtlib/fmt/issues/2040, https://github.com/fmtlib/fmt/pull/2050, https://github.com/fmtlib/fmt/issues/2262). For example: ```c++ #include #include #include int main() { auto bytes = std::vector{std::byte(4), std::byte(2)}; fmt::print("{}", fmt::join(bytes, "")); } ``` prints \"42\". Thanks @kamibo. - Implemented the default format for `std::chrono::system_clock` (https://github.com/fmtlib/fmt/issues/2319, https://github.com/fmtlib/fmt/pull/2345). For example: ```c++ #include int main() { fmt::print("{}", std::chrono::system_clock::now()); } ``` prints \"2021-06-18 15:22:00\" (the output depends on the current date and time). Thanks @sunmy2019. - Made more chrono specifiers locale independent by default. Use the `'L'` specifier to get localized formatting. For example: ```c++ #include int main() { std::locale::global(std::locale("ru_RU.UTF-8")); auto monday = std::chrono::weekday(1); fmt::print("{}\n", monday); // prints "Mon" fmt::print("{:L}\n", monday); // prints "ΠΏΠ½" } ``` - Improved locale handling in chrono formatting (https://github.com/fmtlib/fmt/issues/2337, https://github.com/fmtlib/fmt/pull/2349, https://github.com/fmtlib/fmt/pull/2350). Thanks @phprus. - Deprecated `fmt/locale.h` moving the formatting functions that take a locale to `fmt/format.h` (`char`) and `fmt/xchar` (other overloads). This doesn\'t introduce a dependency on `` so there is virtually no compile time effect. - Deprecated an undocumented `format_to` overload that takes `basic_memory_buffer`. - Made parameter order in `vformat_to` consistent with `format_to` (https://github.com/fmtlib/fmt/issues/2327). - Added support for time points with arbitrary durations (https://github.com/fmtlib/fmt/issues/2208). For example: ```c++ #include int main() { using tp = std::chrono::time_point< std::chrono::system_clock, std::chrono::seconds>; fmt::print("{:%S}", tp(std::chrono::seconds(42))); } ``` prints \"42\". - Formatting floating-point numbers no longer produces trailing zeros by default for consistency with `std::format`. For example: ```c++ #include int main() { fmt::print("{0:.3}", 1.1); } ``` prints \"1.1\". Use the `'#'` specifier to keep trailing zeros. - Dropped a limit on the number of elements in a range and replaced `{}` with `[]` as range delimiters for consistency with Python\'s `str.format`. - The `'L'` specifier for locale-specific numeric formatting can now be combined with presentation specifiers as in `std::format`. For example: ```c++ #include #include int main() { std::locale::global(std::locale("fr_FR.UTF-8")); fmt::print("{0:.2Lf}", 0.42); } ``` prints \"0,42\". The deprecated `'n'` specifier has been removed. - Made the `0` specifier ignored for infinity and NaN (https://github.com/fmtlib/fmt/issues/2305, https://github.com/fmtlib/fmt/pull/2310). Thanks @Liedtke. - Made the hexfloat formatting use the right alignment by default (https://github.com/fmtlib/fmt/issues/2308, https://github.com/fmtlib/fmt/pull/2317). Thanks @Liedtke. - Removed the deprecated numeric alignment (`'='`). Use the `'0'` specifier instead. - Removed the deprecated `fmt/posix.h` header that has been replaced with `fmt/os.h`. - Removed the deprecated `format_to_n_context`, `format_to_n_args` and `make_format_to_n_args`. They have been replaced with `format_context`, `` format_args` and ``make_format_args\`\` respectively. - Moved `wchar_t`-specific functions and types to `fmt/xchar.h`. You can define `FMT_DEPRECATED_INCLUDE_XCHAR` to automatically include `fmt/xchar.h` from `fmt/format.h` but this will be disabled in the next major release. - Fixed handling of the `'+'` specifier in localized formatting (https://github.com/fmtlib/fmt/issues/2133). - Added support for the `'s'` format specifier that gives textual representation of `bool` (https://github.com/fmtlib/fmt/issues/2094, https://github.com/fmtlib/fmt/pull/2109). For example: ```c++ #include int main() { fmt::print("{:s}", true); } ``` prints \"true\". Thanks @powercoderlol. - Made `fmt::ptr` work with function pointers (https://github.com/fmtlib/fmt/pull/2131). For example: ```c++ #include int main() { fmt::print("My main: {}\n", fmt::ptr(main)); } ``` Thanks @mikecrowe. - The undocumented support for specializing `formatter` for pointer types has been removed. - Fixed `fmt::formatted_size` with format string compilation (https://github.com/fmtlib/fmt/pull/2141, https://github.com/fmtlib/fmt/pull/2161). Thanks @alexezeder. - Fixed handling of empty format strings during format string compilation (https://github.com/fmtlib/fmt/issues/2042): ```c++ auto s = fmt::format(FMT_COMPILE("")); ``` Thanks @alexezeder. - Fixed handling of enums in `fmt::to_string` (https://github.com/fmtlib/fmt/issues/2036). - Improved width computation (https://github.com/fmtlib/fmt/issues/2033, https://github.com/fmtlib/fmt/issues/2091). For example: ```c++ #include int main() { fmt::print("{:-<10}{}\n", "δ½ ε₯½", "δΈ–η•Œ"); fmt::print("{:-<10}{}\n", "hello", "world"); } ``` prints ![](https://user-images.githubusercontent.com/576385/119840373-cea3ca80-beb9-11eb-91e0-54266c48e181.png) on a modern terminal. - The experimental fast output stream (`fmt::ostream`) is now truncated by default for consistency with `fopen` (https://github.com/fmtlib/fmt/issues/2018). For example: ```c++ #include int main() { fmt::ostream out1 = fmt::output_file("guide"); out1.print("Zaphod"); out1.close(); fmt::ostream out2 = fmt::output_file("guide"); out2.print("Ford"); } ``` writes \"Ford\" to the file \"guide\". To preserve the old file content if any pass `fmt::file::WRONLY | fmt::file::CREATE` flags to `fmt::output_file`. - Fixed moving of `fmt::ostream` that holds buffered data (https://github.com/fmtlib/fmt/issues/2197, https://github.com/fmtlib/fmt/pull/2198). Thanks @vtta. - Replaced the `fmt::system_error` exception with a function of the same name that constructs `std::system_error` (https://github.com/fmtlib/fmt/issues/2266). - Replaced the `fmt::windows_error` exception with a function of the same name that constructs `std::system_error` with the category returned by `fmt::system_category()` (https://github.com/fmtlib/fmt/issues/2274, https://github.com/fmtlib/fmt/pull/2275). The latter is similar to `std::system_category` but correctly handles UTF-8. Thanks @phprus. - Replaced `fmt::error_code` with `std::error_code` and made it formattable (https://github.com/fmtlib/fmt/issues/2269, https://github.com/fmtlib/fmt/pull/2270, https://github.com/fmtlib/fmt/pull/2273). Thanks @phprus. - Added speech synthesis support (https://github.com/fmtlib/fmt/pull/2206). - Made `format_to` work with a memory buffer that has a custom allocator (https://github.com/fmtlib/fmt/pull/2300). Thanks @voxmea. - Added `Allocator::max_size` support to `basic_memory_buffer`. (https://github.com/fmtlib/fmt/pull/1960). Thanks @phprus. - Added wide string support to `fmt::join` (https://github.com/fmtlib/fmt/pull/2236). Thanks @crbrz. - Made iterators passed to `formatter` specializations via a format context satisfy C++20 `std::output_iterator` requirements (https://github.com/fmtlib/fmt/issues/2156, https://github.com/fmtlib/fmt/pull/2158, https://github.com/fmtlib/fmt/issues/2195, https://github.com/fmtlib/fmt/pull/2204). Thanks @randomnetcat. - Optimized the `printf` implementation (https://github.com/fmtlib/fmt/pull/1982, https://github.com/fmtlib/fmt/pull/1984, https://github.com/fmtlib/fmt/pull/2016, https://github.com/fmtlib/fmt/pull/2164). Thanks @rimathia and @moiwi. - Improved detection of `constexpr` `char_traits` (https://github.com/fmtlib/fmt/pull/2246, https://github.com/fmtlib/fmt/pull/2257). Thanks @phprus. - Fixed writing to `stdout` when it is redirected to `NUL` on Windows (https://github.com/fmtlib/fmt/issues/2080). - Fixed exception propagation from iterators (https://github.com/fmtlib/fmt/issues/2097). - Improved `strftime` error handling (https://github.com/fmtlib/fmt/issues/2238, https://github.com/fmtlib/fmt/pull/2244). Thanks @yumeyao. - Stopped using deprecated GCC UDL template extension. - Added `fmt/args.h` to the install target (https://github.com/fmtlib/fmt/issues/2096). - Error messages are now passed to assert when exceptions are disabled (https://github.com/fmtlib/fmt/pull/2145). Thanks @NobodyXu. - Added the `FMT_MASTER_PROJECT` CMake option to control build and install targets when {fmt} is included via `add_subdirectory` (https://github.com/fmtlib/fmt/issues/2098, https://github.com/fmtlib/fmt/pull/2100). Thanks @randomizedthinking. - Improved build configuration (https://github.com/fmtlib/fmt/pull/2026, https://github.com/fmtlib/fmt/pull/2122). Thanks @luncliff and @ibaned. - Fixed various warnings and compilation issues (https://github.com/fmtlib/fmt/issues/1947, https://github.com/fmtlib/fmt/pull/1959, https://github.com/fmtlib/fmt/pull/1963, https://github.com/fmtlib/fmt/pull/1965, https://github.com/fmtlib/fmt/issues/1966, https://github.com/fmtlib/fmt/pull/1974, https://github.com/fmtlib/fmt/pull/1975, https://github.com/fmtlib/fmt/pull/1990, https://github.com/fmtlib/fmt/issues/2000, https://github.com/fmtlib/fmt/pull/2001, https://github.com/fmtlib/fmt/issues/2002, https://github.com/fmtlib/fmt/issues/2004, https://github.com/fmtlib/fmt/pull/2006, https://github.com/fmtlib/fmt/pull/2009, https://github.com/fmtlib/fmt/pull/2010, https://github.com/fmtlib/fmt/issues/2038, https://github.com/fmtlib/fmt/issues/2039, https://github.com/fmtlib/fmt/issues/2047, https://github.com/fmtlib/fmt/pull/2053, https://github.com/fmtlib/fmt/issues/2059, https://github.com/fmtlib/fmt/pull/2065, https://github.com/fmtlib/fmt/pull/2067, https://github.com/fmtlib/fmt/pull/2068, https://github.com/fmtlib/fmt/pull/2073, https://github.com/fmtlib/fmt/issues/2103, https://github.com/fmtlib/fmt/issues/2105, https://github.com/fmtlib/fmt/pull/2106, https://github.com/fmtlib/fmt/pull/2107, https://github.com/fmtlib/fmt/issues/2116, https://github.com/fmtlib/fmt/pull/2117, https://github.com/fmtlib/fmt/issues/2118, https://github.com/fmtlib/fmt/pull/2119, https://github.com/fmtlib/fmt/issues/2127, https://github.com/fmtlib/fmt/pull/2128, https://github.com/fmtlib/fmt/issues/2140, https://github.com/fmtlib/fmt/issues/2142, https://github.com/fmtlib/fmt/pull/2143, https://github.com/fmtlib/fmt/pull/2144, https://github.com/fmtlib/fmt/issues/2147, https://github.com/fmtlib/fmt/issues/2148, https://github.com/fmtlib/fmt/issues/2149, https://github.com/fmtlib/fmt/pull/2152, https://github.com/fmtlib/fmt/pull/2160, https://github.com/fmtlib/fmt/issues/2170, https://github.com/fmtlib/fmt/issues/2175, https://github.com/fmtlib/fmt/issues/2176, https://github.com/fmtlib/fmt/pull/2177, https://github.com/fmtlib/fmt/issues/2178, https://github.com/fmtlib/fmt/pull/2179, https://github.com/fmtlib/fmt/issues/2180, https://github.com/fmtlib/fmt/issues/2181, https://github.com/fmtlib/fmt/pull/2183, https://github.com/fmtlib/fmt/issues/2184, https://github.com/fmtlib/fmt/issues/2185, https://github.com/fmtlib/fmt/pull/2186, https://github.com/fmtlib/fmt/pull/2187, https://github.com/fmtlib/fmt/pull/2190, https://github.com/fmtlib/fmt/pull/2192, https://github.com/fmtlib/fmt/pull/2194, https://github.com/fmtlib/fmt/pull/2205, https://github.com/fmtlib/fmt/issues/2210, https://github.com/fmtlib/fmt/pull/2211, https://github.com/fmtlib/fmt/pull/2215, https://github.com/fmtlib/fmt/pull/2216, https://github.com/fmtlib/fmt/pull/2218, https://github.com/fmtlib/fmt/pull/2220, https://github.com/fmtlib/fmt/issues/2228, https://github.com/fmtlib/fmt/pull/2229, https://github.com/fmtlib/fmt/pull/2230, https://github.com/fmtlib/fmt/issues/2233, https://github.com/fmtlib/fmt/pull/2239, https://github.com/fmtlib/fmt/issues/2248, https://github.com/fmtlib/fmt/issues/2252, https://github.com/fmtlib/fmt/pull/2253, https://github.com/fmtlib/fmt/pull/2255, https://github.com/fmtlib/fmt/issues/2261, https://github.com/fmtlib/fmt/issues/2278, https://github.com/fmtlib/fmt/issues/2284, https://github.com/fmtlib/fmt/pull/2287, https://github.com/fmtlib/fmt/pull/2289, https://github.com/fmtlib/fmt/pull/2290, https://github.com/fmtlib/fmt/pull/2293, https://github.com/fmtlib/fmt/issues/2295, https://github.com/fmtlib/fmt/pull/2296, https://github.com/fmtlib/fmt/pull/2297, https://github.com/fmtlib/fmt/issues/2311, https://github.com/fmtlib/fmt/pull/2313, https://github.com/fmtlib/fmt/pull/2315, https://github.com/fmtlib/fmt/issues/2320, https://github.com/fmtlib/fmt/pull/2321, https://github.com/fmtlib/fmt/pull/2323, https://github.com/fmtlib/fmt/issues/2328, https://github.com/fmtlib/fmt/pull/2329, https://github.com/fmtlib/fmt/pull/2333, https://github.com/fmtlib/fmt/pull/2338, https://github.com/fmtlib/fmt/pull/2341). Thanks @darklukee, @fagg, @killerbot242, @jgopel, @yeswalrus, @Finkman, @HazardyKnusperkeks, @dkavolis, @concatime, @chronoxor, @summivox, @yNeo, @Apache-HB, @alexezeder, @toojays, @Brainy0207, @vadz, @imsherlock, @phprus, @white238, @yafshar, @BillyDonahue, @jstaahl, @denchat, @DanielaE, @ilyakurdyukov, @ilmai, @JessyDL, @sergiud, @mwinterb, @sven-herrmann, @jmelas, @twoixter, @crbrz and @upsj. - Improved documentation (https://github.com/fmtlib/fmt/issues/1986, https://github.com/fmtlib/fmt/pull/2051, https://github.com/fmtlib/fmt/issues/2057, https://github.com/fmtlib/fmt/pull/2081, https://github.com/fmtlib/fmt/issues/2084, https://github.com/fmtlib/fmt/pull/2312). Thanks @imba-tjd, @0x416c69 and @mordante. - Continuous integration and test improvements (https://github.com/fmtlib/fmt/issues/1969, https://github.com/fmtlib/fmt/pull/1991, https://github.com/fmtlib/fmt/pull/2020, https://github.com/fmtlib/fmt/pull/2110, https://github.com/fmtlib/fmt/pull/2114, https://github.com/fmtlib/fmt/issues/2196, https://github.com/fmtlib/fmt/pull/2217, https://github.com/fmtlib/fmt/pull/2247, https://github.com/fmtlib/fmt/pull/2256, https://github.com/fmtlib/fmt/pull/2336, https://github.com/fmtlib/fmt/pull/2346). Thanks @jgopel, @alexezeder and @DanielaE. The change log for versions 0.8.0 - 7.1.3 is available [here]( doc/ChangeLog-old.md).