 [det]lazy_list_location(-Location)
[det]lazy_list_location(-Location)//| Location | is a term file(Name, Line, LinePos, CharNo)orstream(Stream, Line, LinePos, CharNo)if no file is 
associated to the stream RestLazyList. Finally, if the Lazy list is 
fully materialized (ends in[]), Location is 
unified withend_of_file-CharCount. |