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preserving hygienie in define-record-type

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Alex Shinn 2016-06-18 23:02:25 +09:00
parent 99b39a183f
commit b88f13ef4a
1 changed files with 13 additions and 10 deletions
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23
lib/srfi/9.scm
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@ -16,13 +16,14 @@
(_let (rename 'let))
(_register (rename 'register-simple-type))
(_slot-set! (rename 'slot-set!))
(_type_slot_offset (rename 'type-slot-offset)))
(_type_slot_offset (rename 'type-slot-offset))
(q (rename 'syntax-quote)))
;; catch a common mistake
(if (eq? name make)
(error "same binding for record rtd and constructor" name))
`(,(rename 'begin)
;; type
(,_define ,name (,_register ,name-str ,parent ',(map car fields)))
(,_define ,name (,_register ,name-str ,parent (,q ,(map car fields))))
;; predicate
(,_define ,pred (,(rename 'make-type-predicate)
,(symbol->string (identifier->symbol pred))
@ -35,7 +36,7 @@
,(symbol->string
(identifier->symbol (cadr f)))
,name
(,_type_slot_offset ,name ',(car f))))))
(,_type_slot_offset ,name (,q ,(car f)))))))
fields)
,@(map (lambda (f)
(and (pair? f) (pair? (cdr f)) (pair? (cddr f))
@ -44,7 +45,7 @@
,(symbol->string
(identifier->symbol (car (cddr f))))
,name
(,_type_slot_offset ,name ',(car f))))))
(,_type_slot_offset ,name (,q ,(car f)))))))
fields)
;; constructor
(,_define ,make
@ -59,14 +60,16 @@
,@sets
res))))
(else
(let ((field (assq (car ls) fields)))
(let lp2 ((f fields))
(cond
((not field)
(error "unknown record field in constructor" (car ls)))
((pair? (cddr field))
((null? f)
(error "unknown record field in constructor" (car ls) fields))
((not (compare (car ls) (caar f)))
(lp2 (cdr f)))
((pair? (cddr (car f)))
(lp (cdr ls)
(cons `(,(car (cddr field)) res ,(car ls)) sets)))
(cons `(,(car (cddr (car f))) res ,(car ls)) sets)))
(else
(lp (cdr ls)
(cons `(,_slot-set! ,name res (,_type_slot_offset ,name ',(car ls)) ,(car ls))
(cons `(,_slot-set! ,name res (,_type_slot_offset ,name (,q ,(car ls))) ,(car ls))
sets))))))))))))))