How to solve “Local variable 'touch' might not be initialized before accessing” in a switch statement with property pattern

Question

Answer 1

Maybe solve it in this manner:

case { device: Touchscreen }:
case { device: Mouse }:
    var a = x.device;
    . . .

or

case { device: Mouse or Touchscreen }:
    var a = x.device;
    . . .

where x is the object that is currently analysed.

Probably it depends on other details.