52 lines
933 B
Common Lisp
52 lines
933 B
Common Lisp
;; -*- mode: lisp; -*-
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(fn fact (n)
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(if (<= n 0)
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1
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(* n (fact (- n 1)))))
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(assert (= (fact 12) 479001600))
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(let ((square (fn (x) (* x x))))
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(assert (= (square 4) 16))
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)
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;; Closures should work at least across one scope
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(let ((x 42))
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(assert (= ((fn (y) (+ x y) 1)
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43)))
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)
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;; Closures should work across multiple scopes
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(let ((x 42))
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(assert (=
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(((fn (y)
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(fn () (+ x y)))
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1))
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43))
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)
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;; Top-level functions should be able to capture the "let" scope
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;; to a closure
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(let ((x 42))
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(fn foo() x)
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)
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(assert (= (foo) 42))
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;; Top-level functions should be able to access top-level variables
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(def four 4)
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(fn add-four (x) (+ x four))
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(assert (= (add-four 5) 9))
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;; Passing lisp functions to native functions as parameters
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;; (map is implemented in C++)
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(assert (= (map '(1 2 3) (fn square (x) (* x x)))
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'(1 4 9)))
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