174       : begin (b)  in location()
180       : begin (p)  in begin()  function
188       : begin (f, l, c)  in begin()  function
198       begin.initialize (f, l, c);
199       end = begin;
208       begin = end;  in step()
227     position begin;
288     ostr << loc.begin;
290         && (!loc.begin.filename
291             || *loc.begin.filename != *loc.end.filename))
293     else if (loc.begin.line < loc.end.line)
295     else if (loc.begin.column < end_col)