30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.14 Filesystem operation functions [fs.op.funcs]

30.10.14.20 Is fifo [fs.op.is_fifo]

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