30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.34 Filesystem operation functions [fs.op.funcs] Is block file [fs.op.is_block_file]

bool is_block_file(file_status s) noexcept;

Returns: s.type() == file_­type​::​block.

bool is_block_file(const path& p); bool is_block_file(const path& p, error_code& ec) noexcept;

Returns: is_­block_­file(status(p)) or is_­block_­file(status(p, ec)), respectively. The signature with argument ec returns false if an error occurs.

Throws: As specified in [fs.err.report].