64 lines
3.2 KiB
Plaintext
64 lines
3.2 KiB
Plaintext
; Now we have native BF support
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(def! with_update (fn* [arr idx val]
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(if (= idx 0)
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(cons val (rest arr))
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(cons (first arr) (with_update (rest arr) (- idx 1) val)))))
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(add_grammer_rule 'bfs_atom ["<"] (fn* [xs] (list 'left)))
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(add_grammer_rule 'bfs_atom [">"] (fn* [xs] (list 'right)))
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(add_grammer_rule 'bfs_atom ["\\+"] (fn* [xs] (list 'plus)))
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(add_grammer_rule 'bfs_atom ["-"] (fn* [xs] (list 'minus)))
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(add_grammer_rule 'bfs_atom [","] (fn* [xs] (list 'in)))
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(add_grammer_rule 'bfs_atom ["."] (fn* [xs] (list 'out)))
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(add_grammer_rule 'non_empty_bfs_list ['bfs_atom] (fn* [xs] (list (nth xs 0))))
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(add_grammer_rule 'non_empty_bfs_list ['bfs_atom 'optional_WS 'non_empty_bfs_list] (fn* [xs] (cons (nth xs 0) (nth xs 2))))
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(add_grammer_rule 'bfs_list [] (fn* [xs] xs))
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(add_grammer_rule 'bfs_list ['non_empty_bfs_list] (fn* [xs] (nth xs 0)))
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(add_grammer_rule 'bfs_atom ["\\[" 'bfs_list "]"] (fn* [xs]
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`(let* (f (fn* []
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(if (= 0 (nth (deref arr) (deref ptr)))
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nil
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(do ,(nth xs 1) (f)))))
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(f))))
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(add_grammer_rule 'bfs ['bfs_list] (fn* [xs] (nth xs 0)))
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(add_grammer_rule 'form ["bf" 'optional_WS "{" 'optional_WS 'bfs 'optional_WS "}"]
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(fn* [xs]
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`(fn* [input]
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(let* (
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;arr (atom [0 0 0 0 0])
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arr (atom (vector 0 0 0 0 0))
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output (atom [])
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ptr (atom 0)
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inptr (atom 0)
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left (fn* [] (swap! ptr (fn* [old] (- old 1))))
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right (fn* [] (swap! ptr (fn* [old] (+ old 1))))
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plus (fn* [] (swap! arr (fn* [old] (with_update old (deref ptr) (+ (nth (deref arr) (deref ptr)) 1)))))
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minus (fn* [] (swap! arr (fn* [old] (with_update old (deref ptr) (- (nth (deref arr) (deref ptr)) 1)))))
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in (fn* [] (let* ( h (nth input (deref inptr))
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_ (swap! inptr (fn* [old] (+ old 1))))
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(swap! arr (fn* [old] (with_update old (deref ptr) h)))))
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out (fn* [] (swap! output (fn* [old] (cons (nth (deref arr) (deref ptr)) old)))))
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(do ,(nth xs 4) (deref output))))))
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(println (bf { ,>+++[<.>-] } [1337]))
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;(def! main (fn* [argv] 2))
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;(def! main (fn* [] (let* (a 13 b 12 c 11) b)))
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;(def! main (fn* [] (do 13 12 11)))
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;(def! main (fn* [] (if false 1 2)))
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;(def! main (fn* [] (+ 13 1)))
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;(def! main (fn* [] (- 13 -1)))
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;(def! main (fn* [] (- 13 -1)))
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;(def! main (fn* [] (+ 13 -)))
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;(def! main (fn* [] (+ 13 1 2)))
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;(def! main (fn* [] (cond false 1 false 2 true 3 true 4 false 5)))
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;(def! main (fn* [] ((fn* [] (+ (+ 1 2) 3)) 13 1 2)))
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;(def! main (fn* [] (((fn* [] (fn* [] 1))))))
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(def! main (fn* [] ((fn* [a b c] (- (+ a b) c)) 13 1 4)))
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