| <any> | (<any>) | C | 
| as | (x|<any> y|<any> => <any>) | G | 
|  | coerces y to an instance of x. |  | 
| class-of | (x|<any> => <class>) | G | 
|  | returns concrete class of x. |  | 
| == | (x|<any> y|<any> => <log>) | G | 
|  | returns true iff x and y are computationally
  equivalent. |  | 
| = | (x|<any> y|<any> => <log>) | G | 
|  | returns true iff x and y are equal, where
  equality is user defined and defaults to ==. |  | 
| ~= | (x|<any> y|<any> => <log>) | G | 
|  | ==  (not (= x y)). |  | 
| ~== | (x|<any> y|<any> => <log>) | G | 
|  | ==  (not (== x y)). |  | 
| to-str | (x|<any> => <str>) | G | 
|  | returns string representation of object. |  | 
|  |