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March 21, 2019 14:52
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Padded binary numbers in Common Lisp
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| (defun read-only-chars (stream chars) | |
| (with-output-to-string (result) | |
| (loop while (find (peek-char nil stream) chars) | |
| do (princ (read-char stream) result)))) | |
| (set-dispatch-macro-character #\# #\! (lambda (stream subchar arg) | |
| (parse-integer (remove #\_ (read-only-chars stream "01_")) :radix 2))) |
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