25 lines
680 B
Scheme
25 lines
680 B
Scheme
(define-library (picrin destructuring-bind)
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(import (picrin base)
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(picrin macro))
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(define-syntax (destructuring-bind formal value . body)
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(cond
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((identifier? formal)
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#`(let ((#,formal #,value))
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#,@body))
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((pair? formal)
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#`(let ((value #,value))
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(destructuring-bind #,(car formal) (car value)
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(destructuring-bind #,(cdr formal) (cdr value)
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#,@body))))
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((vector? formal)
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;; TODO
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(error "fixme"))
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(else
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#`(if (equal? #,value '#,formal)
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(begin
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#,@body)
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(error "match failure" #,value '#,formal)))))
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(export destructuring-bind))
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