std::experimental::filesystem::path::extension (3) Linux Manual Page
std::experimental::filesystem::path::extension – std::experimental::filesystem::path::extension Synopsis path extension() const; (filesystem TS) Returns the extension of the filename component of the path *this. If the filename() component of the path contains a period (.), and is not one of the special filesystem elements dot or dot-dot, then the extension is the substring beginning at the rightmost period (including…
