% flags.
-current_prolog_flag(Flag, false) :- Flag == bounded, !.
+current_prolog_flag(Flag, Value) :- Flag == bounded, !, Value == false.
current_prolog_flag(bounded, false).
-current_prolog_flag(Flag, toward_zero) :- Flag == integer_rounding_function, !.
+current_prolog_flag(Flag, Value) :- Flag == integer_rounding_function, !, Value == toward_zero.
current_prolog_flag(integer_rounding_function, toward_zero).
current_prolog_flag(Flag, Value) :- Flag == double_quotes, !, '$get_double_quotes'(Value).
current_prolog_flag(double_quotes, Value) :- '$get_double_quotes'(Value).