ctrl_c_pending is the count of control-C key strokes. Each control-C increments it by one, each control-D decrements it by one.
inner is the count of inner loop traversals in msg_send(). Each pass of the inner loop corresponds to a compare of the message being sent with a message in the current method table. Not directly modifiable.
migrate_messages is the flag that controls message migration. This variable is normally set implicitly using the migrate_messages_on! and migrate_messages_off! messages. The default is ON.
outer is the count of outer loop traversals in msg_send(). Each pass of the outer loop corresponds to a search of a superclass method table. Not directly modifiable.
trap_ctrl_c is the flag that controls control-C processing. If ON, the parser will start a new parsing stream. If OFF, when the user presses control-C, the parser will terminate the program. The default is ON.
valid_messages is the flag to control the output of valid messages for the object. The default is ON.
break_on_error_on! causes msg to invoke an interactive parser when it detects a message-passing error.
break_on_error_off! causes msg to not invoke an interactive parser when it detects a message-passing error.
break_on_trace_match_on! causes msg to invoke an interactive parser when it matches on a selective object or message.
break_on_trace_match_off! disables trace_match breaking.
classes! prints the list of classes in the system on the standard output.
classes? returns the list of classes in the system.
clear_stats! zeros the inner, outer, and msg_count instance variables, resetting the counting mechanism used by the stats! message.
debugon! sets the debug variable ON. If debugging is enabled, the trace_* messages control the printing of diagnostic output for each message sent.
disable_globals! forces all objects create to be placed in the most local symbol table.
enable_globals! forces all objects created to be placed in the most global symbol table.
free: argument deletes an object from the symbol table, removes it from the instances of its class, and frees the storage for the object.
migrate_messages_off! disables message migration, the copying of messages from superclass method tables to subclass method tables when located.
migrate_messages_on! enables message migration, the copying of messages from superclass method tables to subclass method tables when located.
inner? returns the number of traversals of msg_send's inner loop.
outer? returns the number of traversals of msg_send's outer loop.
print_method_table:object prints out the current method table for object. This will change over time as messages migrate into the method table and up to the front of it.
print_stack! displays the LYMB argument stack on stdout. This is useful as a debugging aid to locate missing ARGS_END calls in LYMB C code.
stats! prints message location statistics on stdout.
trap_on_ctrl_c! sets the message handler to trap control-C's and create a new interactive version of the parser. This is the default. To return to the old parser type control-D.
valid_messages? returns the valid messages value.
valid_messages_off! suppresses the listing of valid messages when an object receives an invalid message.
valid_messages_on! turns on the listing of valid messages when an object receives an invalid message.
trace_effect! turns on effect tracing. When a message or object in the trace_messages or trace_objects lists is encountered, message debug tracing will be enabled for all messages sent as a result of that message being sent, if debug is enabled for the msg class. Only one effect trace can be active at a time.
trace_selective! turns on selective message tracing. When a message or object in the trace_messages or trace_objects lists is encountered, information about that one message will be printed, if debug is enabled for the msg class.
trace_all! enables tracing of all messages when debug is enabled for the msg class. This is the default trace mode.
trace_messages[=-+] sets, deletes, or adds messages to be traced when debugging is enabled.
trace_no_messages! clears the list of traced messages.
trace_objects[=-+] sets, deletes, or adds object names to be traced when debugging is enabled.
trace_no_objects! clears the list of traced objects.