(set! cur-lambda (+ 1 cur-lambda))
(format "_lambda~a" (- cur-lambda 1)))
+(define (codegen-closure label captured si env)
+;; (define (codegen-closure label captured si env)
+;; (let* ((stack-offsets (map (lambda (x) (- si (* x wordsize))))
+;; (range 0 (length captured)))
+;; (inner-si (- si (* (length captured) wordsize))))
+;; (for-each (lambda (var-name new-offset)
+;; (emit "movq ~a(%rbp), ~a(%rbp)" ; todo: do we need to copy this?
+;; (cdr (assoc var-name env))
+;; new-offset))
+;; captured
+;; stack-offsets)
+;; )
; for now we can only call closures
(define (codegen-call closure args si env)
+; (codegen-expr closure si env)
(when (not (eq? (ast-type closure) 'closure))
(error #f (format "~a is not a closure" closure)))
(let* ((captured (caddr closure))
(define (codegen-expr e si env)
(case (ast-type e)
('builtin e)
- ('closure e)
+ ('closure (codegen-closure (cadr e) (caddr e) si env))
('app
(let ((callee (codegen-expr (car e) si env)))
(case callee
(test-prog '((lambda (x y) (+ x y)) 1 2) 3)
(test-prog '((lambda (x) (+ ((lambda (y) (+ y 1)) 3) x)) 2) 6)
+
+ ; passing closures about
+(test-prog '((lambda (z) ((lambda (x) (x 1)) (lambda (y) (+ z y)))) 2) 3)