зеркало из https://github.com/mozilla/pjs.git
67 строки
2.0 KiB
Common Lisp
67 строки
2.0 KiB
Common Lisp
(progn
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(defparameter *bew*
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(generate-world
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"BE"
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'((lexer base-example-lexer
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:lalr-1
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:numeral
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((:digit (#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9)
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((value $digit-value))))
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(($digit-value integer digit-value digit-char-36)))
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(%charclass :digit)
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(rule :digits ((decimal-value integer)
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(base-value (-> (integer) integer)))
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(production :digits (:digit) digits-first
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(decimal-value (value :digit))
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((base-value (base integer))
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(let ((d integer (value :digit)))
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(if (< d base) d (bottom integer)))))
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(production :digits (:digits :digit) digits-rest
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(decimal-value (+ (* 10 (decimal-value :digits)) (value :digit)))
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((base-value (base integer))
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(let ((d integer (value :digit)))
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(if (< d base)
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(+ (* base ((base-value :digits) base)) d)
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(bottom integer))))))
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(rule :numeral ((value integer))
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(production :numeral (:digits) numeral-digits
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(value (decimal-value :digits)))
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(production :numeral (:digits #\# :digits) numeral-digits-and-base
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(value
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(let ((base integer (decimal-value :digits 2)))
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(if (and (>= base 2) (<= base 10))
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((base-value :digits 1) base)
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(bottom integer))))))
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(%print-actions)
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)))
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(defparameter *bel* (world-lexer *bew* 'base-example-lexer))
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(defparameter *beg* (lexer-grammar *bel*)))
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#|
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(depict-rtf-to-local-file
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";Test;BaseExampleSemantics.rtf"
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"Base Example Semantics"
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#'(lambda (rtf-stream)
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(depict-world-commands rtf-stream *bew*)))
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(depict-html-to-local-file
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";Test;BaseExampleSemantics.html"
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"Base Example Semantics"
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t
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#'(lambda (html-stream)
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(depict-world-commands html-stream *bew*))
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:external-link-base "")
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(lexer-pparse *bel* "37")
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(lexer-pparse *bel* "33#4")
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(lexer-pparse *bel* "30#2")
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|#
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(length (grammar-states *beg*))
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