40 lines
1.1 KiB
Common Lisp
40 lines
1.1 KiB
Common Lisp
(load "utils.lisp")
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(defstruct node contents yes no)
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(defvar *nodes* (make-hash-table))
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#+(or)
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(defun defnode (name conts &optional yes no)
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(setf (gethash name *nodes*)
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(make-node :contents conts
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:yes yes
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:no no)))
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#+(or)
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(defun defnode (name conts &optional yes no)
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(setf (gethash name *nodes*)
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(if yes
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#'(lambda ()
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(funcall
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(gethash
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(if (eq 'yes (prompt "~a~%>> " conts)) yes no)
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*nodes*)))
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#'(lambda () conts))))
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(defnode 'people "Is the person a man?" 'male 'female)
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(defnode 'male "Is he living?" 'liveman 'deadman)
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(defnode 'deadman "Was he American?" 'us 'them)
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(defnode 'us "Is he on a coin?" 'coin 'cidence)
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(defnode 'coin "Is the coin a penny?" 'penny 'coins)
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(defnode 'penny 'lincoln)
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(defun run-node (name)
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(let1 n (gethash name *nodes*)
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(cond1
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(node-yes n) (run-node
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(if (eq 'yes (prompt "~a~%>> " (node-contents n)))
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(node-yes n)
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(node-no n)))
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(node-contents n))))
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