method to_int = convert basic_to_int self#get
method to_float_array = convert basic_to_float_array self#get
method to_string = convert basic_to_string self#get
+ method of_float_array : float array -> value_type =
+ fun data -> new value (basic_of_float_array data)
method private prim1 : (basic -> basic) -> value =
fun oper ->