+ # Is a control flow break met? (return, break, continue)
+ readable writable var _unreash: Bool = false
+
+ # Is a control flow already broken?
+ # Used to avoid repeating the same error message
+ readable writable var _already_unreash: Bool = false
+
+ # Set of variable that are set (assigned)
+ readable var _set_variables: HashSet[Variable] = new HashSet[Variable]
+
+ # Is a variable set?
+ fun is_set(v: Variable): Bool