`find_program(DOXYGEN doxygen)` didn't find the executable automatically even if I installed Doxygen on Windows. Therefore, I added some additional search paths.
* 2954: Add test case
* Eliminate extra-test and merge it into existing std-test instead. Add conditionals for filesystem::path testing that does not run into the ambiguity problem.
* #2968: Introduce additional compile-time predicate to detect recursive ranges and reject them in formatter specialization for ranges. In addition, introduce additional wrapper traits for the individual logical operands of the complete range constraints
* #2968: Eliminate preprocessor condition that enables the formatter specialization for std::filesystem::path
* #2968: Eliminate preprocessor condition that enables the test for the formatter specialization for std::filesystem::path
* Use own bool_constant, which is available for all C++ versions
* Reintroduce previous workaround but restrict to VS 2015 for now
* Comma fix
* - Rename is_not_recursive_range to is_nonrecursive_range and add comment that explains it being depending on is_range being true
- Merge has_fallback_formatter_delayed into is_formattable_delayed and add comment that explains it being depending on is_not_recursive_range being true
- Replace disjunction in formatter specialization by has_fallback_formatter_delayed
- Get rid of unneeded detail:: prefixes within namespace detail
* #2954: Provide std::conjunction and std::disjunction substitutes
* #2954: Use conjunction and disjunction substitute to make formatter specializations for ranges and maps more robust (especially for Visual Studio compiler family)
* #2954: As workaround for older MSVC compilers split formatter<std::filesystem::path> partial template specialization into two explicit specialization.
* 2954: Add test case
* Provide simplified implementations of conjunction and disjunction
* Remove workaround explicit specializations if the partial specialization would cause an ambiguity error
* Eliminate extra-test and merge it into existing std-test instead. Add conditionals for filesystem::path testing that does not run into the ambiguity problem.
Add support for 'std::variant' in C++17.
For C++17, if all the alternatives of a variant are formattable
the variant is now also formattable. In addition 'std::monostate'
is now formattable.
Moves implementation into 'std.h', and tests into 'std-test.cc'.
Avoid fold-expression since MSVC was crashing.
Add section for 'fmt/std.h' in API-docs.
