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Check the number of args to delay and delay-force

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This commit is contained in:
Kris Katterjohn 2020-07-08 19:15:06 -04:00
parent 6fabc92b3d
commit 948252517f
1 changed files with 4 additions and 0 deletions
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4
lib/init-7.scm
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@ -360,11 +360,15 @@
(define-syntax delay-force
(er-macro-transformer
(lambda (expr rename compare)
(if (null? (cdr expr)) (error "not enough args" expr))
(if (not (null? (cddr expr))) (error "too many args" expr))
`(,(rename 'promise) #f (,(rename 'lambda) () ,(cadr expr))))))
(define-syntax delay
(er-macro-transformer
(lambda (expr rename compare)
(if (null? (cdr expr)) (error "not enough args" expr))
(if (not (null? (cddr expr))) (error "too many args" expr))
`(,(rename 'delay-force) (,(rename 'promise) #t ,(cadr expr))))))
(define-syntax define-auxiliary-syntax