Assertion: common lisp | /r/CapableOf | feature built-in object system
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text: Common Lisp features a built-in object system (CLOS), a condition handling system significantly more powerful than mere exception handling, run-time patchability, and various kinds of built-in data structures and utilites (including the notorious LOOP macro, an iteration sublanguage much too ugly for Scheme but much too useful not to mention, as well as a printf-like formatting mechanism with GOTO support in format strings).