assistance with literal question mark in switch

Would it be safer just to use

 

 

 

/?? {return}

 

 

Then it matches any two single characters? There seems to be contradicting info on the forums/wiki about needing double backslash for the literal question mark, but then in the tclsh test above it saying a single backslash works..

 

I dont want to get caught up with syntax issues

 

 

If its safer doing 2 questions markes for two single occurences of any character I would prefer that, but notice I am not quoting the switch match strings...is that okay when using the double question mark for this?

 

 

Thanks

 

M