Gamma: Version 4.0
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# Predefined Symbols

-- a table.

##

Table 1. 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

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