29.4. .app-file string

.app-file (which may also be spelled “.file”) tells the assembler that we are about to start a new logical file. string is the new file name. In general, the filename is recognized whether or not it is surrounded by quotes “"”; but if you wish to specify an empty file name is permitted, you must give the quotes-"". This statement may go away in future: it is only recognized to be compatible with old the assembler programs.