# Open the file at `path` for writing.
	init open(path: String)
	do
		_file = new NativeFile.io_open_write(path.to_cstring)
		self.path = path
		_is_writable = true
		if _file.as(not null).address_is_null then
			last_error = new IOError("Cannot open `{path}`: {sys.errno.strerror}")
			is_writable = false
		end
	end