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|Книги Автор Denise P. Издательство Wiley|
The simplest way to get rid of the repeated similar calls to FORMAT is to create a new function. (defun report-result (result form) (format t "~:[FAIL~;pass~] ... ~a~%" result form)) Now you can write test-+ with calls to report-result instead of FORMAT. It's not a huge improvement, but at least now if you decide to change the way you report results, there's only one place you have to change. (defun test-+ () (report-result (= (+ 1 2) 3) '(= (+ 1 2) 3)) (report-result (= (+ 1 2 3) 6) '(= (+ 1 2 3) 6)) (report-result (= (+ -1 -3) -4) '(= (+ -1 -3) -4))) Next you need to get rid of the duplication of the test case expression, with its attendant risk of mislabeling of results. What you'd really like is to be able to treat the expression as both code (to get the result) and data (to use as the label). Whenever you want to treat code as data, that's a sure sign you need a macro. Or, to look at it another way, what you need is a way to automate writing the error-prone report-result calls. You'd like to be able to say ...
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