[Bug c++/100465] Overloading operator+= and including filesystem causes conflicting overload compilation error

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100465

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
As a workaround the library could use __str.append or __str.operator+=