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How to express try catch block in Lisp then ? In all programming language, composability was broken at exception handling. No, instead of teaching 2 + 2 = sum
by revskill 4y ago
How to express try catch block in Lisp then ? In all programming language, composability was broken at exception handling.
No, instead of teaching 2 + 2 = sum (2, 2), i will teach the GOTO statement.
- lispm 4y agoCommon Lisp has a bunch of that stuff. For example HANDLER-CASE http://www.lispworks.com/documentation/HyperSpec/Body/m_hand_1.htm http://www.lispworks.com/documentation/HyperSpec/Body/m_hand...
- tmtvl 4y agoA try-catch block? (handler-case (/ 1 0) (division-by-zero (condition) (format nil "We caught ~S." condition)) ((or file-error parse-error type-error) (condition) (format nil "We should never catch ~S" condition)) (:no-error (result) (declare (ignore result)) "We should never get here.")) That's an example of how it can be done in CL, in Scheme you've got guard. (guard (con ((warning? con) "We should never get this.") ((assertion-violation? con) "We should get this.")) (/ 1 0))