Created
October 22, 2011 03:41
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#xyzzy の real 型で数字の範囲を指定して deftype できない
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;; xyzzy の real 型で数字の範囲を指定して deftype できない | |
(deftype negative-real () | |
`(real * (0))) | |
;=> negative-real | |
(typep -1 (si:canonicalize-type 'negative-real)) | |
;=> t | |
(typep 1 (si:canonicalize-type 'negative-real)) | |
;=> t | |
;; integer 他は大丈夫 | |
(deftype negative-integer () | |
`(integer * (0))) | |
;=> negative-integer | |
(typep -1 (si:canonicalize-type 'negative-integer)) | |
;=> t | |
(typep 1 (si:canonicalize-type 'negative-integer)) | |
;=> nil | |
;; clisp だと大丈夫 | |
[1]> (deftype negative-real () | |
`(real * (0))) | |
NEGATIVE-REAL | |
[2]> (typep -1 'negative-real) | |
T | |
[3]> (typep 1 'negative-real) | |
NIL | |
;; 原因は lisp/typespec.l で real だけ defpred-number されてないから | |
(get 'real 'si::type-specifier-list) | |
;=> nil | |
(get 'real 'si::type-predicate) | |
;=> realp | |
(get 'integer 'si::type-specifier-list) | |
;=> #<lexical-closure: (anonymous)> | |
(get 'integer 'si::type-predicate) | |
;=> nil | |
;; 無理矢理 defpred-number したら治った | |
(setf (get 'real 'si::type-predicate) nil) | |
;=> nil | |
(si::defpred-number real realp) | |
;=> #<lexical-closure: (anonymous)> | |
(typep 1 (si:canonicalize-type 'negative-real)) | |
;=> nil | |
(typep -1 (si:canonicalize-type 'negative-real)) | |
;=> t |
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