ANTLR, ANother Tool for Language Recognition, is a language tool that provides a framework for constructing recognizers, interpreters, compilers, and translators from grammatical descriptions containing actions in a variety of target languages.
ApproachâThe route or walk in to the base of a climb. AscenderâAny mechanical device that slides upward when put on a fixed rope but catches when weight is put on it, allowing a climber to use the rope to move upward or to haul gear. Used in aid climbing, mountaineering rescue and caving.
A trad climber is called a traditionalist. Characterizing climbing as traditional distinguishes it from sport climbing (in which all protection and anchor points are permanently installed prior to the climb-typically installed while rappelling) and  free solo climbing  (which does not use ropes or gear of any kind).