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;; Copyright (C) 1994 M. Hagiya, W. Schelter, T. Yuasa |
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;; This file is part of GNU Common Lisp, herein referred to as GCL |
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;; |
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;; GCL is free software; you can redistribute it and/or modify it under |
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;; the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by |
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;; the Free Software Foundation; either version 2, or (at your option) |
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;; any later version. |
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;; |
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;; GCL is distributed in the hope that it will be useful, but WITHOUT |
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;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public |
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;; License for more details. |
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;; |
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;; You should have received a copy of the GNU Library General Public License |
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;; along with GCL; see the file COPYING. If not, write to the Free Software |
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;; Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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;;;; assert.lsp |
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(in-package 'lisp) |
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(export '(check-type assert |
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ecase ccase typecase etypecase ctypecase)) |
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(in-package 'system) |
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(proclaim '(optimize (safety 2) (space 3))) |
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(defmacro check-type (place typespec &optional (string nil s)) |
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`(do ((*print-level* 4) |
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(*print-length* 4)) |
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((typep ,place ',typespec) nil) |
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(cerror "" |
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"The value of ~:@(~S~), ~:@(~S~), is not ~A." |
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',place ,place |
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,(if s string `',typespec)) |
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,(ask-for-form place) |
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(format *error-output* "Now continuing ...~%"))) |
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(defmacro assert (test-form &optional places string &rest args) |
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`(do ((*print-level* 4) |
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(*print-length* 4)) |
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(,test-form nil) |
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,(if string |
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`(cerror "" ,string ,@args) |
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`(cerror "" "The assertion ~:@(~S~) is failed." ',test-form)) |
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,@(mapcar #'ask-for-form places) |
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(format *error-output* "Now continuing ...~%"))) |
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(defun ask-for-form (place) |
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`(progn (format *error-output* |
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"Please input the new value for the place ~:@(~S~): " |
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',place) |
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(finish-output *error-output*) |
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(setf ,place (read)))) |
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(defmacro ecase (keyform &rest clauses &aux (key (gensym))) |
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(do ((l (reverse clauses) (cdr l)) |
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(form `(let ((*print-level* 4) |
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(*print-length* 4)) |
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(error |
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"The value of ~:@(~S~), ~:@(~S~), is ~ |
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~#[nonsense~;not ~:@(~S~)~;neither ~:@(~S~) nor ~:@(~S~)~ |
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~:;not ~@{~#[~;or ~]~:@(~S~)~^, ~}~]." |
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',keyform |
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,key |
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,@(mapcan #'(lambda (x) |
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(if (listp (car x)) |
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(mapcar #'(lambda (y) `',y) (car x)) |
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`(',(car x)))) |
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clauses))))) |
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((endp l) `(let ((,key ,keyform)) ,form)) |
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(when (caar l) |
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(setq form `(if ,(if (listp (caar l)) |
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`(member ,key ',(caar l)) |
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`(eql ,key ',(caar l))) |
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(progn ,@(cdar l)) |
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,form)))) |
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) |
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(defmacro ccase (keyplace &rest clauses &aux (key (gensym))) |
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`(loop (let ((,key ,keyplace)) |
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,@(mapcar #'(lambda (l) |
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`(when ,(if (listp (car l)) |
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`(member ,key ',(car l)) |
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`(eql ,key ',(car l))) |
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(return (progn ,@(cdr l))))) |
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clauses) |
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(let ((*print-level* 4) |
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(*print-length* 4)) |
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(cerror "" |
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"The value of ~:@(~S~), ~:@(~S~), is ~ |
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~#[nonsense~;not ~:@(~S~)~;neither ~ |
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~:@(~S~) nor ~:@(~S~)~ |
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~:;not ~@{~#[~;or ~]~:@(~S~)~^, ~}~]." |
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',keyplace |
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,key |
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,@(mapcan |
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#'(lambda (x) |
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(if (listp (car x)) |
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(mapcar #'(lambda (y) `',y) |
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(car x)) |
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`(',(car x)))) |
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clauses)) |
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,(ask-for-form keyplace) |
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(format *error-output* "Now continuing ...~%")))) |
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) |
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(defmacro typecase (keyform &rest clauses) |
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(do ((l (reverse clauses) (cdr l)) |
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(form nil) (key (gensym))) |
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((endp l) `(let ((,key ,keyform)) ,form)) |
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(if (or (eq (caar l) 't) (eq (caar l) 'otherwise)) |
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(setq form `(progn ,@(cdar l))) |
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(setq form |
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`(if (typep ,key (quote ,(caar l))) |
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(progn ,@(cdar l)) |
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,form)))) |
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) |
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(defmacro etypecase (keyform &rest clauses &aux (key (gensym))) |
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(do ((l (reverse clauses) (cdr l)) |
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(form `(error (typecase-error-string |
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',keyform ,key |
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',(mapcar #'(lambda (l) (car l)) clauses))))) |
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((endp l) `(let ((,key ,keyform)) ,form)) |
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(setq form `(if (typep ,key ',(caar l)) |
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(progn ,@(cdar l)) |
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,form)) |
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) |
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) |
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(defmacro ctypecase (keyplace &rest clauses &aux (key (gensym))) |
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`(loop (let ((,key ,keyplace)) |
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,@(mapcar #'(lambda (l) |
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`(when (typep ,key ',(car l)) |
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(return (progn ,@(cdr l))))) |
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clauses) |
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(cerror "" |
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(typecase-error-string |
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',keyplace ,key |
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',(mapcar #'(lambda (l) (car l)) clauses)))) |
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,(ask-for-form keyplace) |
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(format *error-output* "Now continuing ...~%"))) |
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) |
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(defun typecase-error-string |
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(keyform keyvalue negs |
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&aux (negs1 nil) (poss nil) (poss1 nil)) |
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(do () |
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((endp negs)) |
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(if (symbolp (car negs)) |
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(progn (push (list (car negs)) negs1) (pop negs)) |
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(case (caar negs) |
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(or (setq negs (append (cdar negs) (cdr negs)))) |
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(member (mapc #'(lambda (x) (push `(member ,x) negs1)) |
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(cdar negs)) |
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(pop negs)) |
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(not (push (cadar negs) poss) (pop negs)) |
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(otherwise (push (car negs) negs1) (pop negs))))) |
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(do () |
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((endp poss)) |
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(cond ((symbolp (car poss)) (push (list (car poss)) poss1) (pop poss)) |
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((eq (caar poss) 'and) |
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(setq poss (append (cdar poss) (cdr poss)))) |
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(t (push (car poss) poss1) (pop poss)))) |
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(format |
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nil |
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"The value of ~:@(~S~), ~:@(~S~), is ~?~?." |
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keyform |
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keyvalue |
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"~#[~;~;~?~;~;~? and ~?~:;~%~@{~#[~;~;and ~]~?~^, ~}~]" |
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(mapcan 'typecase-error-strings poss1) |
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"~:[~[something~;~:;~%~]~;~[~:;, but~%~]~]~ |
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~#[~;~;not ~?~;~;neither ~? nor ~?~:;not ~@{~#[~;~;or ~]~?~^, ~}~]" |
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(cons poss1 (cons (length negs1) |
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(mapcan 'typecase-error-strings (reverse negs1)))) |
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) |
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) |
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(defun typecase-error-strings (type) |
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(cond ((eq (car type) 'member) |
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(case (length (cdr type)) |
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(0 `("one of none" nil)) |
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(1 `("~:@(~S~)" (,(cadr type)))) |
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(2 `("either ~:@(~S~) or ~:@(~S~)" ,(cdr type))) |
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(t `("one of ~:@(~S~)" (,(cdr type)))))) |
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((eq (car type) 'satisfies) |
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`("an object satisfying ~:@(~S~)" ,(cdr type))) |
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((or (endp (cdr type)) (null (remove '* (cdr type)))) |
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(let ((x (assoc (car type) |
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'((t "anything") |
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(nil "none") |
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(null "nil") |
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(common "an object of a standard data type"))))) |
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(if x |
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`(,(cadr x) nil) |
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`("~:[a~;an~] ~(~A~)" (,(boin-p (car type)) ,(car type)))))) |
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(t `("~:[a~;an~] ~:@(~S~)" (,(boin-p (car type)) ,type)))) |
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) |
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(defun boin-p (symbol) |
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(member (elt (symbol-name symbol) 0) |
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'(#\A #\I #\U #\E #\O #\a #\i #\u #\e #\o)) |
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) |
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