232 lines
6.8 KiB
Common Lisp
232 lines
6.8 KiB
Common Lisp
; make label self-evaluating, but evaluating the lambda in the process
|
|
;(defmacro labl (name f)
|
|
; (list list ''labl (list 'quote name) f))
|
|
|
|
(defmacro labl (name f)
|
|
`(let (,name) (setq ,name ,f)))
|
|
|
|
;(define (reverse lst)
|
|
; ((label rev-help (lambda (lst result)
|
|
; (if (null lst) result
|
|
; (rev-help (cdr lst) (cons (car lst) result)))))
|
|
; lst nil))
|
|
|
|
(define (append- . lsts)
|
|
((label append-h
|
|
(lambda (lsts)
|
|
(cond ((null lsts) ())
|
|
((null (cdr lsts)) (car lsts))
|
|
(T ((label append2 (lambda (l d)
|
|
(if (null l) d
|
|
(cons (car l)
|
|
(append2 (cdr l) d)))))
|
|
(car lsts) (append-h (cdr lsts)))))))
|
|
lsts))
|
|
|
|
;(princ 'Hello '| | 'world! "\n")
|
|
;(filter (lambda (x) (not (< x 0))) '(1 -1 -2 5 10 -8 0))
|
|
(define (fib n) (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2)))))
|
|
;(princ (time (fib 34)) "\n")
|
|
;(dotimes (i 20000) (map-int (lambda (x) (list 'quote x)) 8))
|
|
;(dotimes (i 40000) (append '(a b) '(1 2 3 4) nil '(c) nil '(5 6)))
|
|
;(dotimes (i 80000) (list 1 2 3 4 5))
|
|
;(setq a (map-int identity 10000))
|
|
;(dotimes (i 200) (rfoldl cons nil a))
|
|
|
|
; iterative filter
|
|
(defun ifilter (pred lst)
|
|
((label f (lambda (accum lst)
|
|
(cond ((null lst) (nreverse accum))
|
|
((not (pred (car lst))) (f accum (cdr lst)))
|
|
(T (f (cons (car lst) accum) (cdr lst))))))
|
|
nil lst))
|
|
|
|
(defun sort (l)
|
|
(if (or (null l) (null (cdr l))) l
|
|
(let ((piv (car l)))
|
|
(nconc (sort (filter (lambda (x) (<= x piv)) (cdr l)))
|
|
(list piv)
|
|
(sort (filter (lambda (x) (> x piv)) (cdr l)))))))
|
|
|
|
(defmacro dotimes (var . body)
|
|
(let ((v (car var))
|
|
(cnt (cadr var)))
|
|
`(let ((,v 0))
|
|
(while (< ,v ,cnt)
|
|
(prog1
|
|
,(f-body body)
|
|
(setq ,v (+ ,v 1)))))))
|
|
|
|
(defun map-int (f n)
|
|
(if (<= n 0)
|
|
()
|
|
(let ((first (cons (f 0) nil)))
|
|
((label map-int-
|
|
(lambda (acc i n)
|
|
(if (= i n)
|
|
first
|
|
(progn (rplacd acc (cons (f i) nil))
|
|
(map-int- (cdr acc) (+ i 1) n)))))
|
|
first 1 n))))
|
|
|
|
(defmacro labl (name fn)
|
|
`((lambda (,name) (setq ,name ,fn)) nil))
|
|
|
|
(define (square x) (* x x))
|
|
(define (evenp x) (= x (* (/ x 2) 2)))
|
|
(define (expt b p)
|
|
(cond ((= p 0) 1)
|
|
((= b 0) 0)
|
|
((evenp p) (square (expt b (/ p 2))))
|
|
(T (* b (expt b (- p 1))))))
|
|
|
|
(define (gcd a b)
|
|
(cond ((= a 0) b)
|
|
((= b 0) a)
|
|
((< a b) (gcd a (- b a)))
|
|
(T (gcd b (- a b)))))
|
|
|
|
; like eval-when-compile
|
|
(defmacro literal (expr)
|
|
(let ((v (eval expr)))
|
|
(if (self-evaluating-p v) v (list quote v))))
|
|
|
|
(defun cardepth (l)
|
|
(if (atom l) 0
|
|
(+ 1 (cardepth (car l)))))
|
|
|
|
(defun nestlist (f zero n)
|
|
(if (<= n 0) ()
|
|
(cons zero (nestlist f (f zero) (- n 1)))))
|
|
|
|
(defun mapl (f . lsts)
|
|
((label mapl-
|
|
(lambda (lsts)
|
|
(if (null (car lsts)) ()
|
|
(progn (apply f lsts) (mapl- (map cdr lsts))))))
|
|
lsts))
|
|
|
|
; test to see if a symbol begins with :
|
|
(defun keywordp (s)
|
|
(and (>= s '|:|) (<= s '|:~|)))
|
|
|
|
; swap the cars and cdrs of every cons in a structure
|
|
(defun swapad (c)
|
|
(if (atom c) c
|
|
(rplacd c (K (swapad (car c))
|
|
(rplaca c (swapad (cdr c)))))))
|
|
|
|
(defun without (x l)
|
|
(filter (lambda (e) (not (eq e x))) l))
|
|
|
|
(defun conscount (c)
|
|
(if (consp c) (+ 1
|
|
(conscount (car c))
|
|
(conscount (cdr c)))
|
|
0))
|
|
|
|
; _ Welcome to
|
|
; (_ _ _ |_ _ | . _ _ 2
|
|
; | (-||||_(_)|__|_)|_)
|
|
; ==================|==
|
|
|
|
;[` _ ,_ |- | . _ 2
|
|
;| (/_||||_()|_|_\|)
|
|
; |
|
|
|
|
(defmacro while- (test . forms)
|
|
`((label -loop- (lambda ()
|
|
(if ,test
|
|
(progn ,@forms
|
|
(-loop-))
|
|
nil)))))
|
|
|
|
; this would be a cool use of thunking to handle 'finally' clauses, but
|
|
; this code doesn't work in the case where the user manually re-raises
|
|
; inside a catch block. one way to handle it would be to replace all
|
|
; their uses of 'raise' with '*_try_finally_raise_*' which calls the thunk.
|
|
; (try expr
|
|
; (catch (TypeError e) . exprs)
|
|
; (catch (IOError e) . exprs)
|
|
; (finally . exprs))
|
|
(defmacro try (expr . forms)
|
|
(let ((final (f-body (cdr (or (assoc 'finally forms) '(())))))
|
|
(body (foldr
|
|
; create a function to check for and handle one exception
|
|
; type, and pass off control to the next when no match
|
|
(lambda (catc next)
|
|
(let ((var (cadr (cadr catc)))
|
|
(extype (caadr catc))
|
|
(todo (f-body (cddr catc))))
|
|
`(lambda (,var)
|
|
(if (or (eq ,var ',extype)
|
|
(and (consp ,var)
|
|
(eq (car ,var) ',extype)))
|
|
,todo
|
|
(,next ,var)))))
|
|
|
|
; default function; no matches so re-raise
|
|
'(lambda (e) (progn (*_try_finally_thunk_*) (raise e)))
|
|
|
|
; make list of catch forms
|
|
(filter (lambda (f) (eq (car f) 'catch)) forms))))
|
|
`(let ((*_try_finally_thunk_* (lambda () ,final)))
|
|
(prog1 (attempt ,expr ,body)
|
|
(*_try_finally_thunk_*)))))
|
|
|
|
(defun map (f lst)
|
|
(if (atom lst) lst
|
|
(cons (funcall f (car lst)) (map f (cdr lst)))))
|
|
|
|
(define Y
|
|
(lambda (f)
|
|
((lambda (h)
|
|
(f (lambda (x) ((h h) x))))
|
|
(lambda (h)
|
|
(f (lambda (x) ((h h) x)))))))
|
|
|
|
(define yfib
|
|
(Y (lambda (fib)
|
|
(lambda (n)
|
|
(if (< n 2) n (+ (fib (- n 1)) (fib (- n 2))))))))
|
|
|
|
(defmacro debug ()
|
|
(let ((g (gensym)))
|
|
`(progn (princ "Debug REPL:\n")
|
|
(let ((,g (read)))
|
|
(while (not (eq ,g 'quit))
|
|
(prog1
|
|
(print (trycatch (apply '(macro x x) ,g)
|
|
identity))
|
|
(setq ,g (read))))))))
|
|
|
|
;(defun tt () (time (dotimes (i 500000) (* 0x1fffffff 1) )))
|
|
;(tt)
|
|
;(tt)
|
|
;(tt)
|
|
|
|
(defmacro delay (expr)
|
|
(let ((g (gensym)))
|
|
`(let ((,g ',g))
|
|
(lambda () (if (eq ,g ',g) (setq ,g ,expr) ,g)))))
|
|
|
|
(defmacro accumulate-while (cnd what . body)
|
|
(let ((first (gensym))
|
|
(acc (gensym))
|
|
(forms (f-body body)))
|
|
`(let ((,first (prog1 (cons ,what nil) ,forms))
|
|
(,acc nil))
|
|
(setq ,acc ,first)
|
|
(while ,cnd
|
|
(progn (rplacd ,acc (cons ,what nil))
|
|
(setq ,acc (cdr ,acc))
|
|
,forms))
|
|
,first)))
|
|
|
|
(defun map-indexed (f lst)
|
|
(if (atom lst) lst
|
|
(let ((i 0))
|
|
(accumulate-while (consp lst) (f (car lst) i)
|
|
(setq lst (cdr lst))
|
|
(setq i (1+ i))))))
|