11.2.0

• Added the s specifier for std::error_code. It allows formatting an error message as a string. For example:

  #include <fmt/std.h>
  
  int main() {
    auto ec = std::make_error_code(std::errc::no_such_file_or_directory);
    fmt::print("{:s}\n", ec);
  }

  prints

  No such file or directory
  

  (The actual message is platform-specific.)

• Fixed formatting of std::chrono::local_time and tm (#3815, #4350). For example (godbolt):

  #include <fmt/chrono.h>
  
  int main() {
    std::chrono::zoned_time zt(
      std::chrono::current_zone(),
      std::chrono::system_clock::now());
    fmt::print("{}", zt.get_local_time());
  }

  is now formatted consistenly across platforms.

• Added diagnostics for cases when timezone information is not available. For example:

  fmt::print("{:Z}", std::chrono::local_seconds());

  now gives a compile-time error.

• Deprecated fmt::localtime in favor of std::localtime.

• Fixed compilation with GCC 15 and C++20 modules enabled (#4347). Thanks @tkhyn.

• Fixed handling of named arguments in format specs (#4360, #4361). Thanks @dinomight.

• Added error reporting for duplicate named arguments (#4367). Thanks @dinomight.

• Fixed formatting of long with FMT_BUILTIN_TYPES=0 (#4375, #4394).

• Optimized text_style using bit packing (#4363). Thanks @localspook.

• Added support for incomplete types (#3180, #4383). Thanks @localspook.

• Fixed a flush issue in fmt::print when using libstdc++ (#4398).

• Fixed fmt::println usage with FMT_ENFORCE_COMPILE_STRING and legacy compile-time checks (#4407). Thanks @madmaxoft.

• Removed legacy header fmt/core.h from docs (#4421, #4422). Thanks @krzysztofkortas.

• Worked around limitations of __builtin_strlen during constant evaluation (#4423, #4429). Thanks @brevzin.

• Worked around a bug in MSVC v141 (#4412, #4413). Thanks @hirohira9119.

• Removed the fmt_detail namespace (#4324).

• Removed specializations of std::is_floating_point in tests (#4417).

• Fixed a CMake error when setting CMAKE_MODULE_PATH in the pedantic mode (#4426). Thanks @rlalik.

• Updated the Bazel config (#4400). Thanks @Vertexwahn.