It might just be my information that is outdated, but I vaguely recalled this: viewtopic.php?p=638296#p638296
and besides that it seems gcc doesn't work, only clang, I don't think that's a big issue though: viewtopic.php?p=575983#p575983
It might just be my information that is outdated, but I vaguely recalled this: viewtopic.php?p=638296#p638296
QSpan has been integrated in qt/qtbase, it requires only C++17.
while the other one does not say anything about requirements.C++14 is the highest possible for FreeCAD 0.19 while at least C++17 is required for FreeCAD 0.20.
Note there is class FileInfo, which deserves update probably the most. Work already started, but stalled on setting up Windows and MacOS test environment (Windows is using wchar for path, so that needs some testing)... Unless someone willing to do beta tester for me