Presumably etags/gtags/hasktags etc., ie. having built a TAGS database for such a helper program, you can use it in an editor to jump from a field name to its d

Presumably etags/gtags/hasktags etc., ie. having built a TAGS database for such a helper program, you can use it in an editor to jump from a field name to its definition. That wouldn't be the case with a lens accessor.