param1          "--param1 "          i  (1, "real") | mode %in% c("x1", "x2")
param2          "--param2 "          i  ("real", 10) | mode %in% c("x1", "x3") & real > 2.5 & real <= 3.5
mode            "--"                 c  ("x1" ,"x2", "x3")
real            "--paramreal="       r  (1.5, 7.5)
mutation        "--mutation="        o  ("none", "very low", "low", "medium", "high", "very high", "all")
#unused         "-u "                c  (1, 2, 10, 20)