use var in case declaration

[jps01]

is it possible to use variables for the case parameters in a Sel statement? 

sel i
    case [1 2 3 4]
    do something

replace with the case option with array elements,  something like this

sel i
    case [z[1] z[2] z[3] z[4]]
    do something

the error I receive is 'expected integer constant' so I am assuming this is not possible, but if you could confirm that please. 

thanks.