Common Lisp condition system [1] https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node317.html https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node317.html [2] h

Common Lisp condition system [1] https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node317.html https://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node317.html [2] http://gigamonkeys.com/book/beyond-exception-handling-conditions-and-restarts.html http://gigamonkeys.com/book/beyond-exception-handling-condit...