• TraceOn is an option for Trace and related functions which specifies when tracing should be switched on.
• With the setting TraceOn -> patt
and related functions do not start tracing until they encounter expressions to evaluate which match the pattern patt
. This pattern is also tested against tags associated with the evaluation.
can be used within tracing switched on by TraceOn
• Once tracing has been switched off by TraceOff
, however, TraceOn
will not switch it on again.
• During the execution of Trace
, the settings for TraceOn
can be modified by resetting the values of the global variables $TraceOn
• New in Version 2.