30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.14 Filesystem operation functions [fs.op.funcs] Is directory [fs.op.is_directory]

bool is_directory(file_status s) noexcept;
Returns: s.type() == file_­type​::​directory.
bool is_directory(const path& p); bool is_directory(const path& p, error_code& ec) noexcept;
Returns: is_­directory(status(p)) or is_­directory(status(p, ec)), respectively.
The signature with argument ec returns false if an error occurs.
Throws: As specified in [fs.err.report].