transcendental-lisp/fitnesse/FitNesseRoot/LispInterpreter/MultipleMethodClosure.wiki

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---
Test
---
| script | lisp interpreter fixture |
| # | Object with multiple methods |
| show | evaluate |!-
(defun counter-class-multi ()
(let ((counter 0))
(lambda (msg)
(case msg
((:inc)
(setq counter (+ counter 1)))
((:dec)
(setq counter (- counter 1)))))))
-!|
| show | evaluate | (setq my-counter (counter-class-multi)) |
| check | evaluate | (funcall my-counter :inc) | 1 |
| check | evaluate | (funcall my-counter :inc) | 2 |
| check | evaluate | (funcall my-counter :inc) | 3 |
| check | evaluate | (funcall my-counter :dec) | 2 |
| check | evaluate | (funcall my-counter :dec) | 1 |
| check | evaluate | (funcall my-counter :dec) | 0 |