-val index_empty_texts : bool ref
-val sample_factor : int ref
-val disable_text_collection : bool ref
-val count_only : bool ref
-val query : string ref
-val input_file : string ref
-val output_file : string option ref
-val save_file : string ref
-val time : bool ref
-val tc_threshold : int ref
-val bottom_up : bool ref
-val no_jump : bool ref
-val no_cache : bool ref
-val verbose : bool ref
-val text_index_type : int ref
-val do_perf : bool ref
-val twopass : bool ref
-val repeat : int ref
-val docstats : bool ref
-val no_wrap_results : bool ref