manually checked modified files for errors, but not committing .clang-format due to the following warning:
>>> Setting `QualifierAlignment` to something other than `Leave`, COULD lead to incorrect code formatting due to incorrect decisions made due to clang-formats lack of complete semantic information. As such extra care should be taken to review code changes made by the use of this option.
Apparently the added constexpr makes gcc's control flow analysis to go deeper.
If from_chars returns with error then the out parameter remains
uninitialized. As it's undefined behavior to use its value, it's better
to just skip the rest of the loop in this case.
