cannot include header in multiple place. about filesystem HOT 2 CLOSED

I see, you use inline for keep this header work in multiple files. But i find some methods are still not inline,which makes the problem.
I can successfully compile by fix the methods by add "inline" keyword, but i think it is not a good solution as the code size grows a lot in my case.
I think a separate the implementation into .cc file is still a good idea.

from filesystem.

Indeed some inlines where missing. I missed adding a test to ensure that including it into multiple implementation files works. I'll push a fix for that.

I understand, that there are arguments for a separated approach, but this is explicitly designed as a header-only/single-file solution, so currently there are no plans for separation into a .h/.cpp pair of files or even more files.

I once had an early version that supported separation by including the header with specific defines for implementation or forwarding header, but the effect was not as relevant as I had hoped, the code got quite a bit uglier to work with, and with link-time-optimization (-flto on gcc) most redundancies are dropped from the binary.
Still if multiple shared libraries are including this header, it might make more of a difference, but the results of that tests pushed the feature down the list.

from filesystem.