

Does this still exist? How would one use it?
The operator ./2 is now dict dereferencing, so I guess this "feature" is out?
?- X is 0'a. X = 97.
But:
?- X is .a. ERROR: Syntax error: Operator expected ERROR: X is ERROR: ** here ** ERROR: .a . ?- X is .[a]. ERROR: Syntax error: Operator expected ERROR: X is ERROR: ** here ** ERROR: .[a] . ?- .(X,[a]). ERROR: Unknown procedure: ('.')/2 ERROR: However, there are definitions for: ERROR: ('.')/3 false.