[dependabot]

Bumps fmt from 12.1.0-codeql.1 to 12.2.0.bcr.1.

Release notes

Sourced from fmt's releases.

12.2.0

• Added a C11 API that brings fast, type-safe formatting to C. The new fmt-c library and fmt/fmt-c.h header use _Generic to dispatch on argument types and outperform printf/sprintf. For example:

  #include <fmt/fmt-c.h>
  fmt_print(stdout, "The answer is {}.\n", 42);

  (fmtlib/fmt#4663, fmtlib/fmt#4671, fmtlib/fmt#4696, fmtlib/fmt#4693, fmtlib/fmt#4694, fmtlib/fmt#4712, fmtlib/fmt#4789). Thanks @​Soumik15630m, @​Ferdi265 and @​localspook.

• Added a separate fmt::fmt-module CMake target for C++20 modules and a CI workflow that exercises module-based builds (fmtlib/fmt#4684, fmtlib/fmt#4685, fmtlib/fmt#4707, fmtlib/fmt#4708, fmtlib/fmt#4702, fmtlib/fmt#4709). Thanks @​MathewBensonCode.

• Enabled the full Dragonbox lookup cache by default for floating-point formatting unless optimizing for binary size (__OPTIMIZE_SIZE__), giving a ~10–25% speedup. Thanks Matthias Kretz for the suggestion. Average time per double on Apple M1 Pro (clang 17, random digits, smaller is better) measured with dtoa-benchmark:

  Method	Time (ns)
  fmt (full)	22.07
  fmt (compact)	29.55
  ryu	35.21
  double-conversion	81.81
  sprintf	726.27
  ostringstream	864.34

• Improved integer formatting performance by ~3% (fmtlib/fmt#4630). Thanks @​user202729.

• Optimized formatting into back-insert iterators by using bulk container append/insert methods (e.g. on std::vector<char> and custom string types) (fmtlib/fmt#4679). Thanks @​user202729.

• Reduced binary size of debug builds (~200k to ~85k in the bloat test) and improved compile speed when consteval is unavailable.

• Made path formatting lossless, preserving ill-formed UTF-16 sequences when converting std::filesystem::path to a narrow string.

• Added support for formatting std::unexpected (fmtlib/fmt#4675). Thanks @​17steen.

• Added overloads of fmt::println that take a fmt::text_style (fmtlib/fmt#4782). Thanks @​ahoarau.

• Added support for positional arguments as width and precision specifiers in fmt::printf (fmtlib/fmt#4643). Thanks @​KareemOtoum.

• Made FMT_STRING a no-op when FMT_USE_CONSTEVAL is enabled, since the consteval format-string constructor already provides compile-time validation (fmtlib/fmt#4611, fmtlib/fmt#4612). Thanks @​friedkeenan.

• Promoted fmt::detail::named_arg to the public API as fmt::named_arg and deprecated the detail alias (fmtlib/fmt#4683, fmtlib/fmt#4687). Thanks @​TPPPP72.

• Moved the std::byte formatter from fmt/format.h to fmt/std.h.

• Provided a default definition for fmt::is_contiguous (fmtlib/fmt#4731, fmtlib/fmt#4770). Thanks @​user202729 and @​phprus.

• Added the FMT_USE_FLOCKFILE macro to disable the use of flockfile (fmtlib/fmt#4646, fmtlib/fmt#4666). Thanks @​mvastola.

• Added include_guard(GLOBAL) so that {fmt} can be used in multiple submodules of the same project (fmtlib/fmt#4672). Thanks @​torsten48.

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Changelog

Sourced from fmt's changelog.

12.2.1 - TBD

• Added a formatter for std::exception_ptr that formats the referenced exception (or none when null) (fmtlib/fmt#4808, fmtlib/fmt#4819). Thanks @​avikivity and @​Atlas-Zero.

• Added unwinding of nested exceptions created via std::throw_with_nested to the std::exception formatter, joining each level with ": " (fmtlib/fmt#4844). Thanks @​avikivity.

• Exported the ostream formatters (fmt::basic_ostream_formatter, fmt::ostream_formatter) and fmt::streamed from the C++20 module (fmtlib/fmt#4861). Thanks @​avikivity.

• Documented how to use the C++20 module with CMake, including the fmt::fmt-module target and compiler requirements (fmtlib/fmt#4237).

• Optimized 128-bit integer formatting by reducing the value to 64-bit chunks instead of doing repeated 128-bit division, giving a ~5x speedup on full-range values.

• Fixed handling of out-of-range floating-point durations in chrono formatting (fmtlib/fmt#4802). Thanks @​aizu-m.

• Fixed a hang and assertion failure when printing to a pipe whose read end is closed (fmtlib/fmt#4797). Thanks @​nikola-sh.

• Fixed formatting of out-of-range integers with the c presentation type, which previously mangled negative values and silently truncated out-of-range ones (fmtlib/fmt#4839). Thanks @​igoloe.

• Fixed an FMT_COMPILE failure for user-defined types formatted via format_as (fmtlib/fmt#4794, fmtlib/fmt#4836). Thanks @​mjerabek and @​upadhyay74aman.

• Fixed the fallback uint128 bitwise-not implementation (fmtlib/fmt#4813). Thanks @​Vcode2407.

• Fixed a false positive in fmt::is_contiguous by explicitly checking for operator[] on the container itself (fmtlib/fmt#4825). Thanks @​tearfur.

• Generated the build-tree CMake export set regardless of FMT_INSTALL,

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