After text is modified with the replacement text of a rule, if this value is false (default) , then uCalc will continue parsing from the position just after the insertion of the modified text.
If this property is set to true, then the parser will rewind to the location where the match was
found, and parse again, which will allow it to potentially find matches of this or other rules.
Special care should be taken so that an infinite reparsing session doesn't take place. For instance, if a rule changes A to B, and another rule changes B to A, and this property is set ot true, and
there is an occurence of A, then A will change to B. B will be parsed again and changed to A. The
cycle will repeat itself indefinitely.