Gamma™ : Version 6.4
	Symbols and Literals

Predefined Symbols

— a table.

Table 9. Symbols that are predefined in Gamma

Symbol Name	Description	Accessibility
`_all_tasks_`	The list of tasks opened using `locate_task`.	read-only
`_auto_load_alist_`	A list of rules used by `AutoLoad`.	read/write
`_case_sensitive_`	Used by reader to control case sensitivity. If `nil`, then all symbols are treated as lower-case. Default is `t`.	read/write
`_comma_`	Internal symbol.	not available
`_commasplice_`	Internal symbol.	not available
`_current_input_`	The currently open file for reading.	read-only
`_debug_`	Not used.	not available
`_eof_`	Gamma representation of the end-of-file status from a read operation.	read-only
`_eol_`	Gamma representation of the end-of-line status from a read operation.	read-only
`_error_stack_`	The stack at the time the last error occurred.	read-only
`_eval_silently_`	If set to `t`, then references to undefined symbols are returned as `_undefined_` instead of stopping the program with an error.	read/write
`_eval_stack_`	Contains the definition of the function being currently evaluated.	read-only
`_event_`	The QNX Windows event name.	read-only
`_fixed_point_`	Controls whether calculations with reals are done in double or fixed-point.	read/write
`_gui_`	The name of the graphical user interface that this version of Gamma was compiled against, as a string.	read-only
`_gui_version_`	The version number of the graphical user interface that this version of Gamma was compiled against, as a string.	read-only
`_ipc_file_`	String file used by IPC functions to create buffers for send/receive/reply sequence.	not available
`_jump_stack_`	Internal symbol.	not available
`_last_error_`	String containing last error.	read-only
`_load_extensions_`	List of strings containing shell-match patterns of acceptable input files.	read/write
`_os_`	The name of the operating system (OS) that this version of Gamma was compiled in, as a string.	read-only
`_os_version_`	The version number of the operating system that this version of Gamma was compiled in, as a string.	read-only
`_os_release_`	The release number of the operating system that this version of Gamma was compiled in, as a string.	read-only
`_require_path_`	List of strings of paths to search for `require` and `require_lisp`.	read-write
`_signal_handlers_`	See `signal`.	read-only
`SIGABRT`	See `signal`.	read-only
`SIGALRM`	See `signal`.	read-only
`SIGBUS`	See `signal`.	read-only
`SIGCHLD`	See `signal`.	read-only
`SIGCONT`	See `signal`.	read-only
`SIGFPE`	See `signal`.	read-only
`SIGHUP`	See `signal`.	read-only
`SIGILL`	See `signal`.	read-only
`SIGINT`	See `signal`.	read-only
`SIGIO`	See `signal`.	read-only
`SIGIOT`	See `signal`.	read-only
`SIGKILL`	See `signal`.	read-only
`SIGPIPE`	See `signal`.	read-only
`SIGPOLL`	See `signal`.	read-only
`SIGPWR`	See `signal`.	read-only
`SIGQUIT`	See `signal`.	read-only
`SIGSEGV`	See `signal`.	read-only
`SIGSTOP`	See `signal`.	read-only
`SIGTERM`	See `signal`.	read-only
`SIGTRAP`	See `signal`.	read-only
`SIGTSTP`	See `signal`.	read-only
`SIGTTIN`	See `signal`.	read-only
`SIGTTOU`	See `signal`.	read-only
`SIGURG`	See `signal`.	read-only
`SIGUSR1`	See `signal`.	read-only
`SIGUSR2`	See `signal`.	read-only
`SIGWINCH`	See `signal`.	read-only
`_timers_`	An array of active timers, in this format: [[`secs` `nsecs` `fires` ((`s-exp` ...)...) `number`]...] `secs` The clock time in seconds when the timer was set. `nsecs` The additional nanoseconds when the timer was set. `fires` The set interval of time to fire, in seconds. `s-exp` Action(s) associated with the timer, inside a list of lists. `number` The timer number.	read-only
`_undefined_`	The Gamma representation of the undefined symbol state.	read-only
`_unwind_stack_`	The stack at the time that an error was recovered.	read-only
`&noeval , !`	Symbol directing Gamma to not evaluate the next argument.	not available
`&optional , ?`	Symbol directing Gamma to treat the following argument as optional.	not available
`=>&rest , ...`	Symbol directing Gamma to expect an optional number of arguments starting at last argument. Passed as a list.	not available


Literals		Reserved Words