Implementing Singletons in Verse

#define the global class
global := class<varies><concrete>(): 
   var MaybeMainDevice : ?main_device = false

#create the global instance
Global : global = global{}

#function that makes it easier to access the device without checking if the option has a value
GetMainDevice():main_device = 
    if(MainDevice := Global.MaybeMainDevice?) then MainDevice else main_device{}


#in your device's OnBegin you need this line:
set Global.MaybeMainDevice = option{Self}

#when you want to use it, you call:
GetMainDevice()

Implementing Singletons in Verse

Comments