The current implementation assumes whenever we're on an FMT_MSC_VERSION
compiler, the standard library is MSVC's STL. However, with clang-cl we
have the possibility of using LLVM libc++ instead of MSVC STL. In that
scenario, the previous implementation produced the wrong demangled names
for RTTI types.
This patch detects the different combinations, and combines the existing
demangling implementations to produce the correct names and make all
tests pass on libc++ + clang-cl.
With exceptions: No change (if FMT_THROW is not user provided)
Without exceptions: Now also states where it comes from (report_error)
and uses fprintf instead of fputs.
My motivation is, now that I have my own fmt::assert_failed, also to get
rid of fputs for my embedded build.
That way one can provide ones own implementation for assert_fail, which
is moved out of the detail namespace. For binary compatibility the
detail version stays to call the outer version.
* Handle allocator propagation in basic_memory_buffer::move
Update `basic_memory_buffer::move` to respect `propagate_on_container_move_assignment`allocator trait.
If the allocator should not propagate and differs from the target's allocator,
fallback to copying the buffer instead of transferring ownership.
This avoids potential allocator mismatch issues and ensures exception safety.
* Add test cases for the updated move ctor
- Added two test cases `move_ctor_inline_buffer_non_propagating` and `move_ctor_dynamic_buffer_non_propagating`
- Added `PropageteOnMove` template parameter to `allocator_ref` class to be compatible with the old test cases
- `allocator_ref` now implements `!=` and `==` operators
