Log Message:
fmtlib: update to 9.1.0

From Wongboo via Github pull request.

Closes NetBSD/pkgsrc#111.

9.1.0 - 2022-08-27
------------------

* ``fmt::formatted_size`` now works at compile time
  . For example
  (`godbolt <https://godbolt.org/z/1MW5rMdf8>`__):

  .. code:: c++

     #include <fmt/compile.h>

     int main() {
       using namespace fmt::literals;
       constexpr size_t n = fmt::formatted_size("{}"_cf, 42);
       fmt::print("{}\n", n); // prints 2
     }

* Fixed handling of invalid UTF-8.

* Improved Unicode support in ``ostream`` overloads of ``print``.

* Fixed handling of the sign specifier in localized formatting on systems with
  32-bit ``wchar_t`` .

* Added support for wide streams to ``fmt::streamed``.

* Added the ``n`` specifier that disables the output of delimiters when
  formatting ranges.
  For example (`godbolt <https://godbolt.org/z/roKqGdj8c>`__):

  .. code:: c++

     #include <fmt/ranges.h>
     #include <vector>

     int main() {
       auto v = std::vector{1, 2, 3};
       fmt::print("{:n}\n", v); // prints 1, 2, 3
     }

* Worked around problematic ``std::string_view`` constructors introduced in
  C++23

* Improve handling (exclusion) of recursive ranges

* Improved error reporting in format string compilation.

* Improved the implementation of
  `Dragonbox <https://github.com/jk-jeon/dragonbox>`_, the algorithm used for
  the default floating-point formatting.

* Fixed issues with floating-point formatting on exotic platforms.

* Improved the implementation of chrono formatting.

* Improved documentation.

* Improved build configuration.

* Fixed various warnings and compilation issues.

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>`__):

  .. code:: c++

     #include <array>
     #include <fmt/compile.h>

     consteval auto compile_time_dtoa(double value) -> std::array<char, \ 
10> {
       auto result = std::array<char, 10>();
       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.

* 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>`__):

  .. code:: c++

     #include <fmt/ostream.h>

     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<date> : 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>`__):

  .. code:: c++

     #include <thread>
     #include <fmt/ostream.h>

     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.
  For example (`godbolt <https://godbolt.org/z/KG9z6cq68>`__):

  .. code:: c++

     #include <variant>
     #include <fmt/std.h>

     int main() {
       auto v = std::variant<int, std::string>(42);
       fmt::print("{}\n", v);
     }

  prints::

     variant(42)

  Thanks `@jehelset <https://github.com/jehelset>`_.

* Added experimental ``std::filesystem::path`` formatting support
  (`#2865 <https://github.com/fmtlib/fmt/issues/2865>`_,
  `#2902 <https://github.com/fmtlib/fmt/pull/2902>`_,
  `#2917 <https://github.com/fmtlib/fmt/issues/2917>`_,
  `#2918 <https://github.com/fmtlib/fmt/pull/2918>`_).
  For example (`godbolt <https://godbolt.org/z/o44dMexEb>`__):

  .. code:: c++

     #include <filesystem>
     #include <fmt/std.h>

     int main() {
       fmt::print("There is no place like {}.", \ 
std::filesystem::path("/home"));
     }

  prints::

     There is no place like "/home".

* Added a ``std::thread::id`` formatter to ``fmt/std.h``.
  For example (`godbolt <https://godbolt.org/z/j1azbYf3E>`__):

  .. code:: c++

     #include <thread>
     #include <fmt/std.h>

     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.
  .
  For example (`godbolt <https://godbolt.org/z/vWGW7v5M6>`__):

  .. code:: c++

     #include <fmt/chrono.h>
     #include <fmt/color.h>

     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");
     }

* Made ``fmt::print`` overload for text styles correctly handle UTF-8.

* Fixed Unicode handling when writing to an ostream.

* Added support for nested specifiers to range formatting:

  .. code:: c++

     #include <vector>
     #include <fmt/ranges.h>

     int main() {
       fmt::print("{::#x}\n", std::vector{10, 20, 30});
     }

  prints ``[0xa, 0x14, 0x1e]``.

* Implemented escaping of wide strings in ranges.

* Added support for ranges with ``begin`` / ``end`` found via the
  argument-dependent lookup.

* Fixed formatting of certain kinds of ranges of ranges.

* Fixed handling of maps with element types other than ``std::pair``.

* Made tuple formatter enabled only if elements are formattable.

* Made ``fmt::join`` compatible with format string compilation.

* Made compile-time checks work with named arguments of custom types and
  ``std::ostream`` ``print`` overloads.

* Removed ``make_args_checked`` because it is no longer needed for compile-time.

* 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``.

* Removed a redundant buffer resize when formatting to ``std::ostream``.

* Made precision computation for strings consistent with width.
  .

* Fixed handling of locale separators in floating point formatting.

* Made sign specifiers work with ``__int128_t``.

* Improved support for systems such as CHERI with extra data stored in pointers.

* Improved documentation.

* Improved build configuration.

* Fixed various warnings and compilation issues.