removing some redundant/irrelevant files
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JeffBezanson
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1ef3c13acf
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ca1b12064f
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; femtoLisp standard library
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; by Jeff Bezanson
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; Public Domain
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(set 'list (lambda args args))
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(set-syntax 'setq (lambda (name val)
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(list set (list 'quote name) val)))
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; convert a sequence of body statements to a single expression.
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; this allows define, defun, defmacro, let, etc. to contain multiple
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; body expressions as in Common Lisp.
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(setq f-body (lambda (e)
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(cond ((atom e) e)
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((eq (cdr e) ()) (car e))
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(T (cons 'progn e)))))
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(set-syntax 'defmacro
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(lambda (name args . body)
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(list 'set-syntax (list 'quote name)
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(list 'lambda args (f-body body)))))
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(defmacro label (name fn)
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(list (list 'lambda (cons name nil) (list 'setq name fn)) nil))
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; support both CL defun and Scheme-style define
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(defmacro defun (name args . body)
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(list 'setq name (list 'lambda args (f-body body))))
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(defmacro define (name . body)
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(if (symbolp name)
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(list 'setq name (car body))
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(cons 'defun (cons (car name) (cons (cdr name) body)))))
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(defun identity (x) x)
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(setq null not)
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(defun map (f lst)
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(if (atom lst) lst
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(cons (f (car lst)) (map f (cdr lst)))))
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(defmacro let (binds . body)
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(cons (list 'lambda
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(map (lambda (c) (if (consp c) (car c) c)) binds)
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(f-body body))
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(map (lambda (c) (if (consp c) (cadr c) nil)) binds)))
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(defun nconc lsts
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(cond ((null lsts) ())
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((null (cdr lsts)) (car lsts))
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(T ((lambda (l d) (if (null l) d
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(prog1 l
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(while (consp (cdr l)) (set 'l (cdr l)))
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(rplacd l d))))
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(car lsts) (apply nconc (cdr lsts))))))
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(defun append lsts
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(cond ((null lsts) ())
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((null (cdr lsts)) (car lsts))
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(T ((label append2 (lambda (l d)
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(if (null l) d
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(cons (car l)
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(append2 (cdr l) d)))))
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(car lsts) (apply append (cdr lsts))))))
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(defun member (item lst)
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(cond ((atom lst) ())
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((equal (car lst) item) lst)
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(T (member item (cdr lst)))))
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(defun macrocallp (e) (and (symbolp (car e))
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(symbol-syntax (car e))))
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(defun functionp (x)
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(or (builtinp x)
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(and (consp x) (eq (car x) 'lambda))))
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(defun macroexpand-1 (e)
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(if (atom e) e
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(let ((f (macrocallp e)))
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(if f (apply f (cdr e))
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e))))
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; convert to proper list, i.e. remove "dots", and append
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(defun append.2 (l tail)
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(cond ((null l) tail)
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((atom l) (cons l tail))
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(T (cons (car l) (append.2 (cdr l) tail)))))
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(define (cadr x) (car (cdr x)))
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(setq *special-forms* '(quote cond if and or while lambda label trycatch
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%top progn))
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(defun macroexpand (e)
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((label mexpand
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(lambda (e env f)
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(progn
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(while (and (consp e)
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(not (member (car e) env))
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(set 'f (macrocallp e)))
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(set 'e (apply f (cdr e))))
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(cond ((and (consp e)
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(not (eq (car e) 'quote)))
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(let ((newenv
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(if (and (or (eq (car e) 'lambda)
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(eq (car e) 'label))
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(consp (cdr e)))
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(append.2 (cadr e) env)
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env)))
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(map (lambda (x) (mexpand x newenv nil)) e)))
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((and (symbolp e) (constantp e)) (eval e))
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;((and (symbolp e)
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; (not (member e *special-forms*))
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; (not (member e env))) (cons '%top e))
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(T e)))))
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e nil nil))
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; uncomment this to macroexpand functions at definition time.
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; makes typical code ~25% faster, but only works for defun expressions
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; at the top level.
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(defmacro defun (name args . body)
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(list 'setq name (macroexpand (list 'lambda args (f-body body)))))
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; same thing for macros. enabled by default because macros are usually
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; defined at the top level.
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(defmacro defmacro (name args . body)
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(list 'set-syntax (list 'quote name)
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(macroexpand (list 'lambda args (f-body body)))))
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(setq = equal)
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(setq eql equal)
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(define (/= a b) (not (equal a b)))
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(define != /=)
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(define (> a b) (< b a))
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(define (<= a b) (not (< b a)))
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(define (>= a b) (not (< a b)))
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(define (1+ n) (+ n 1))
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(define (1- n) (- n 1))
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(define (mod x y) (- x (* (/ x y) y)))
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(define (abs x) (if (< x 0) (- x) x))
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(setq K prog1) ; K combinator ;)
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(define (funcall f . args) (apply f args))
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(define (symbol-value sym) (eval sym))
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(define symbol-function symbol-value)
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(define (terpri) (princ "\n") nil)
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(define (caar x) (car (car x)))
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(define (cdar x) (cdr (car x)))
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(define (cddr x) (cdr (cdr x)))
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(define (caaar x) (car (car (car x))))
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(define (caadr x) (car (car (cdr x))))
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(define (cadar x) (car (cdr (car x))))
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(define (caddr x) (car (cdr (cdr x))))
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(define (cdaar x) (cdr (car (car x))))
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(define (cdadr x) (cdr (car (cdr x))))
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(define (cddar x) (cdr (cdr (car x))))
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(define (cdddr x) (cdr (cdr (cdr x))))
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(defun every (pred lst)
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(or (atom lst)
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(and (pred (car lst))
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(every pred (cdr lst)))))
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(defun any (pred lst)
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(and (consp lst)
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(or (pred (car lst))
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(any pred (cdr lst)))))
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(defun listp (a) (or (eq a ()) (consp a)))
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(defun nthcdr (n lst)
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(if (<= n 0) lst
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(nthcdr (- n 1) (cdr lst))))
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(defun list-ref (lst n)
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(car (nthcdr n lst)))
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(defun list* l
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(if (atom (cdr l))
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(car l)
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(cons (car l) (apply list* (cdr l)))))
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(defun nlist* l
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(if (atom (cdr l))
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(car l)
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(rplacd l (apply nlist* (cdr l)))))
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(defun lastcdr (l)
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(if (atom l) l
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(lastcdr (cdr l))))
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(defun last (l)
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(cond ((atom l) l)
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((atom (cdr l)) l)
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(T (last (cdr l)))))
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(defun map! (f lst)
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(prog1 lst
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(while (consp lst)
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(rplaca lst (f (car lst)))
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(set 'lst (cdr lst)))))
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(defun mapcar (f . lsts)
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((label mapcar-
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(lambda (lsts)
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(cond ((null lsts) (f))
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((atom (car lsts)) (car lsts))
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(T (cons (apply f (map car lsts))
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(mapcar- (map cdr lsts)))))))
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lsts))
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(defun transpose (M) (apply mapcar (cons list M)))
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(defun filter (pred lst)
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(cond ((null lst) ())
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((pred (car lst)) (cons (car lst) (filter pred (cdr lst))))
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(T (filter pred (cdr lst)))))
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(define (foldr f zero lst)
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(if (null lst) zero
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(f (car lst) (foldr f zero (cdr lst)))))
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(define (foldl f zero lst)
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(if (null lst) zero
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(foldl f (f (car lst) zero) (cdr lst))))
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(define (reverse lst) (foldl cons nil lst))
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(defun reduce (f zero lst)
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(if (null lst) zero
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(reduce f (f zero (car lst)) (cdr lst))))
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(define (copy-list l)
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(if (atom l) l
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(cons (car l)
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(copy-list (cdr l)))))
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(define (copy-tree l)
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(if (atom l) l
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(cons (copy-tree (car l))
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(copy-tree (cdr l)))))
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(define (nreverse l)
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(let ((prev nil))
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(while (consp l)
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(set 'l (prog1 (cdr l)
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(rplacd l (prog1 prev
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(set 'prev l))))))
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prev))
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(defmacro let* (binds . body)
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(cons (list 'lambda (map car binds)
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(cons 'progn
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(nconc (map (lambda (b) (cons 'setq b)) binds)
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body)))
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(map (lambda (x) nil) binds)))
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(defmacro labels (binds . body)
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(cons (list 'lambda (map car binds)
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(cons 'progn
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(nconc (map (lambda (b)
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(list 'setq (car b) (cons 'lambda (cdr b))))
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binds)
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body)))
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(map (lambda (x) nil) binds)))
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(defmacro when (c . body) (list 'if c (f-body body) nil))
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(defmacro unless (c . body) (list 'if c nil (f-body body)))
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(defmacro dotimes (var . body)
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(let ((v (car var))
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(cnt (cadr var)))
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(list 'let (list (list v 0))
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(list 'while (list < v cnt)
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(list prog1 (f-body body) (list 'setq v (list + v 1)))))))
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(defun map-int (f n)
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(if (<= n 0)
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()
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(let ((first (cons (f 0) nil)))
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((label map-int-
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(lambda (acc i n)
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(if (= i n)
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first
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(progn (rplacd acc (cons (f i) nil))
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(map-int- (cdr acc) (+ i 1) n)))))
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first 1 n))))
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(defun iota (n) (map-int identity n))
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(defun error args (raise (cons 'error args)))
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(defmacro throw (tag value) `(raise (list 'thrown-value ,tag ,value)))
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(defmacro catch (tag expr)
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(let ((e (gensym)))
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`(trycatch ,expr
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(lambda (,e) (if (and (consp ,e)
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(eq (car ,e) 'thrown-value)
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(eq (cadr ,e) ,tag))
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(caddr ,e)
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(raise ,e))))))
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(defmacro unwind-protect (expr finally)
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(let ((e (gensym)))
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`(prog1 (trycatch ,expr
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(lambda (,e) (progn ,finally (raise ,e))))
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,finally)))
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; (try expr
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; (catch (type-error e) . exprs)
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; (catch (io-error e) . exprs)
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; (catch (e) . exprs)
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; (finally . exprs))
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(defmacro try (expr . forms)
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(let* ((e (gensym))
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(reraised (gensym))
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(final (f-body (cdr (or (assoc 'finally forms) '(())))))
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(catches (filter (lambda (f) (eq (car f) 'catch)) forms))
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(catchblock `(cond
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,.(map (lambda (catc)
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(let* ((specific (cdr (cadr catc)))
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(extype (caadr catc))
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(var (if specific (car specific)
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extype))
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(todo (cddr catc)))
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`(,(if specific
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; exception matching logic
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`(or (eq ,e ',extype)
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(and (consp ,e)
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(eq (car ,e)
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',extype)))
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T); (catch (e) ...), match anything
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(let ((,var ,e)) (progn ,@todo)))))
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catches)
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(T (raise ,e))))) ; no matches, reraise
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(if final
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(if catches
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; form with both catch and finally
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`(prog1 (trycatch ,expr
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(lambda (,e)
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(trycatch ,catchblock
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(lambda (,reraised)
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(progn ,final
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(raise ,reraised))))))
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,final)
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; finally only; same as unwind-protect
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`(prog1 (trycatch ,expr (lambda (,e)
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(progn ,final (raise ,e))))
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,final))
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; catch, no finally
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`(trycatch ,expr (lambda (,e) ,catchblock)))))
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; setf
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; expands (setf (place x ...) v) to (mutator (f x ...) v)
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; (mutator (identity x ...) v) is interpreted as (mutator x ... v)
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(setq *setf-place-list*
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; place mutator f
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'((car rplaca identity)
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(cdr rplacd identity)
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(caar rplaca car)
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(cadr rplaca cdr)
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(cdar rplacd car)
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(cddr rplacd cdr)
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(caaar rplaca caar)
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(caadr rplaca cadr)
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(cadar rplaca cdar)
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(caddr rplaca cddr)
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(cdaar rplacd caar)
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(cdadr rplacd cadr)
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(cddar rplacd cdar)
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(cdddr rplacd cddr)
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(get put identity)
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(aref aset identity)
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(symbol-function set identity)
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(symbol-value set identity)
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(symbol-plist set-symbol-plist identity)
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(symbol-syntax set-syntax identity)))
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|
||||||
|
|
||||||
(defun setf-place-mutator (place val)
|
|
||||||
(if (symbolp place)
|
|
||||||
(list 'setq place val)
|
|
||||||
(let ((mutator (assoc (car place) *setf-place-list*)))
|
|
||||||
(if (null mutator)
|
|
||||||
(error '|setf: unknown place | (car place))
|
|
||||||
(if (eq (caddr mutator) 'identity)
|
|
||||||
(cons (cadr mutator) (append (cdr place) (list val)))
|
|
||||||
(list (cadr mutator)
|
|
||||||
(cons (caddr mutator) (cdr place))
|
|
||||||
val))))))
|
|
||||||
|
|
||||||
(defmacro setf args
|
|
||||||
(f-body
|
|
||||||
((label setf-
|
|
||||||
(lambda (args)
|
|
||||||
(if (null args)
|
|
||||||
nil
|
|
||||||
(cons (setf-place-mutator (car args) (cadr args))
|
|
||||||
(setf- (cddr args))))))
|
|
||||||
args)))
|
|
||||||
|
|
||||||
(defun revappend (l1 l2) (nconc (reverse l1) l2))
|
|
||||||
(defun nreconc (l1 l2) (nconc (nreverse l1) l2))
|
|
||||||
|
|
||||||
(defun list-to-vector (l) (apply vector l))
|
|
||||||
(defun vector-to-list (v)
|
|
||||||
(let ((i (- (length v) 1))
|
|
||||||
(l nil))
|
|
||||||
(while (>= i 0)
|
|
||||||
(setq l (cons (aref v i) l))
|
|
||||||
(setq i (- i 1)))
|
|
||||||
l))
|
|
||||||
|
|
||||||
(defun self-evaluating-p (x)
|
|
||||||
(or (eq x nil)
|
|
||||||
(eq x T)
|
|
||||||
(and (atom x)
|
|
||||||
(not (symbolp x)))))
|
|
||||||
|
|
||||||
; backquote
|
|
||||||
(defmacro backquote (x) (bq-process x))
|
|
||||||
|
|
||||||
(defun splice-form-p (x)
|
|
||||||
(or (and (consp x) (or (eq (car x) '*comma-at*)
|
|
||||||
(eq (car x) '*comma-dot*)))
|
|
||||||
(eq x '*comma*)))
|
|
||||||
|
|
||||||
(defun bq-process (x)
|
|
||||||
(cond ((self-evaluating-p x)
|
|
||||||
(if (vectorp x)
|
|
||||||
(let ((body (bq-process (vector-to-list x))))
|
|
||||||
(if (eq (car body) 'list)
|
|
||||||
(cons vector (cdr body))
|
|
||||||
(list apply vector body)))
|
|
||||||
x))
|
|
||||||
((atom x) (list 'quote x))
|
|
||||||
((eq (car x) 'backquote) (bq-process (bq-process (cadr x))))
|
|
||||||
((eq (car x) '*comma*) (cadr x))
|
|
||||||
((not (any splice-form-p x))
|
|
||||||
(let ((lc (lastcdr x))
|
|
||||||
(forms (map bq-bracket1 x)))
|
|
||||||
(if (null lc)
|
|
||||||
(cons 'list forms)
|
|
||||||
(nconc (cons 'nlist* forms) (list (bq-process lc))))))
|
|
||||||
(T (let ((p x) (q ()))
|
|
||||||
(while (and (consp p)
|
|
||||||
(not (eq (car p) '*comma*)))
|
|
||||||
(setq q (cons (bq-bracket (car p)) q))
|
|
||||||
(setq p (cdr p)))
|
|
||||||
(let ((forms
|
|
||||||
(cond ((consp p) (nreconc q (list (cadr p))))
|
|
||||||
((null p) (nreverse q))
|
|
||||||
(T (nreconc q (list (bq-process p)))))))
|
|
||||||
(if (null (cdr forms))
|
|
||||||
(car forms)
|
|
||||||
(cons 'nconc forms)))))))
|
|
||||||
|
|
||||||
(defun bq-bracket (x)
|
|
||||||
(cond ((atom x) (list cons (bq-process x) nil))
|
|
||||||
((eq (car x) '*comma*) (list cons (cadr x) nil))
|
|
||||||
((eq (car x) '*comma-at*) (list 'copy-list (cadr x)))
|
|
||||||
((eq (car x) '*comma-dot*) (cadr x))
|
|
||||||
(T (list cons (bq-process x) nil))))
|
|
||||||
|
|
||||||
; bracket without splicing
|
|
||||||
(defun bq-bracket1 (x)
|
|
||||||
(if (and (consp x) (eq (car x) '*comma*))
|
|
||||||
(cadr x)
|
|
||||||
(bq-process x)))
|
|
||||||
|
|
||||||
(defmacro assert (expr) `(if ,expr T (raise '(assert-failed ,expr))))
|
|
||||||
|
|
||||||
(defmacro time (expr)
|
|
||||||
(let ((t0 (gensym)))
|
|
||||||
`(let ((,t0 (time.now)))
|
|
||||||
(prog1
|
|
||||||
,expr
|
|
||||||
(princ "Elapsed time: " (- (time.now) ,t0) " seconds\n")))))
|
|
||||||
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Reference in New Issue