748 lines
20 KiB
Scheme
748 lines
20 KiB
Scheme
; -*- scheme -*-
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; femtoLisp standard library
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; by Jeff Bezanson (C) 2009
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; Distributed under the BSD License
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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.
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(set! f-body (lambda (e)
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(cond ((atom? e) #f)
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((eq (cdr e) ()) (car e))
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(#t (cons 'begin e)))))
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(set-syntax! 'define-macro
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(lambda (form . body)
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(list 'set-syntax! (list 'quote (car form))
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(list 'lambda (cdr form) (f-body body)))))
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(define-macro (define form . body)
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(if (symbol? form)
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(list 'set! form (car body))
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(list 'set! (car form) (list 'lambda (cdr form) (f-body body)))))
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(define (set s v) (eval (list 'set! s (list 'quote v))))
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(define (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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(define-macro (label name fn)
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(list (list 'lambda (list name) (list 'set! name fn)) #f))
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(define-macro (let binds . body)
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((lambda (lname)
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(begin
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(if (symbol? binds)
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(begin (set! lname binds)
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(set! binds (car body))
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(set! body (cdr body))))
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((lambda (thelambda theargs)
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(cons (if lname
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(list 'label lname thelambda)
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thelambda)
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theargs))
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(list 'lambda
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(map (lambda (c) (if (pair? c) (car c) c)) binds)
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(f-body body))
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(map (lambda (c) (if (pair? c) (cadr c) #f)) binds))))
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#f))
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(define-macro (letrec binds . body)
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(cons (list 'lambda (map car binds)
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(f-body
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(nconc (map (lambda (b) (cons 'set! b)) binds)
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body)))
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(map (lambda (x) #f) binds)))
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; standard procedures ---------------------------------------------------------
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(define (append2 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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(define (append . lsts)
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(cond ((null? lsts) ())
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((null? (cdr lsts)) (car lsts))
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(#t (append2 (car lsts)
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(apply append (cdr lsts))))))
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(define (member item lst)
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(cond ((atom? lst) #f)
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((equal? (car lst) item) lst)
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(#t (member item (cdr lst)))))
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(define (memv item lst)
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(cond ((atom? lst) #f)
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((eqv? (car lst) item) lst)
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(#t (memv item (cdr lst)))))
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(define (assoc item lst)
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(cond ((atom? lst) #f)
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((equal? (caar lst) item) (car lst))
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(#t (assoc item (cdr lst)))))
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(define (assv item lst)
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(cond ((atom? lst) #f)
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((eqv? (caar lst) item) (car lst))
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(#t (assv item (cdr lst)))))
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(define = eqv?)
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(define (/= a b) (not (eqv? a b)))
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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 (negative? x) (< x 0))
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(define (zero? x) (= x 0))
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(define (positive? x) (> x 0))
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(define (even? x) (= (logand x 1) 0))
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(define (odd? x) (not (even? x)))
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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 remainder mod)
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(define (abs x) (if (< x 0) (- x) x))
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(define (identity x) x)
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(define (char? x) (eq? (typeof x) 'wchar))
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(define (function? x)
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(or (builtin? x)
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(and (pair? x) (or (eq (car x) 'lambda)
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(eq (car x) 'compiled-lambda)))))
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(define procedure? function?)
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(define (caar x) (car (car x)))
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(define (cadr x) (car (cdr 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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(define (cadddr x) (car (cdr (cdr (cdr x)))))
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; list utilities --------------------------------------------------------------
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(define (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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(define (any pred lst)
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(and (pair? lst)
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(or (pred (car lst))
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(any pred (cdr lst)))))
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(define (listp a) (or (null? a) (pair? a)))
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(define (list? a) (or (null? a) (and (pair? a) (list? (cdr a)))))
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(define (list-tail lst n)
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(if (<= n 0) lst
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(list-tail (cdr lst) (- n 1))))
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(define (list-head lst n)
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(if (<= n 0) ()
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(cons (car lst)
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(list-head (cdr lst) (- n 1)))))
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(define (list-ref lst n)
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(car (list-tail lst n)))
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; bounded length test
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; use this instead of (= (length lst) n), since it avoids unnecessary
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; work and always terminates.
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(define (length= lst n)
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(cond ((< n 0) #f)
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((= n 0) (null? lst))
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((null? lst) (= n 0))
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(else (length= (cdr lst) (- n 1)))))
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(define (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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(define (nlist* . l)
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(if (atom? (cdr l))
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(car l)
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(set-cdr! l (apply nlist* (cdr l)))))
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(define (lastcdr l)
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(if (atom? l) l
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(lastcdr (cdr l))))
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(define (last-pair l)
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(cond ((atom? l) l)
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((atom? (cdr l)) l)
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(#t (last-pair (cdr l)))))
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(define (to-proper l)
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(cond ((null? l) l)
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((atom? l) (list l))
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(else (cons (car l) (to-proper (cdr l))))))
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(define (map! f lst)
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(prog1 lst
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(while (pair? lst)
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(set-car! lst (f (car lst)))
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(set! lst (cdr lst)))))
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(letrec ((mapcar-
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(lambda (f 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- f (map cdr lsts))))))))
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(set! mapcar
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(lambda (f . lsts) (mapcar- f lsts))))
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(define (transpose M) (apply mapcar (cons list M)))
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(letrec ((filter-
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(lambda (pred lst accum)
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(cond ((null? lst) accum)
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((pred (car lst))
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(filter- pred (cdr lst) (cons (car lst) accum)))
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(#t
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(filter- pred (cdr lst) accum))))))
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(set! filter
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(lambda (pred lst) (filter- pred lst ()))))
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(letrec ((separate-
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(lambda (pred lst yes no)
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(cond ((null? lst) (cons yes no))
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((pred (car lst))
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(separate- pred (cdr lst) (cons (car lst) yes) no))
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(#t
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(separate- pred (cdr lst) yes (cons (car lst) no)))))))
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(set! separate
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(lambda (pred lst) (separate- pred lst () ()))))
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(define (nestlist f zero n)
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(if (<= n 0) ()
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(cons zero (nestlist f (f zero) (- n 1)))))
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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 () 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 ()))
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(while (pair? l)
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(set! l (prog1 (cdr l)
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(set-cdr! l (prog1 prev
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(set! prev l))))))
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prev))
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(define (delete-duplicates lst)
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(if (atom? lst)
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lst
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(let ((elt (car lst))
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(tail (cdr lst)))
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(if (member elt tail)
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(delete-duplicates tail)
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(cons elt
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(delete-duplicates tail))))))
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(letrec ((get-defined-vars-
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(lambda (expr)
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(cond ((atom? expr) ())
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((and (eq? (car expr) 'define)
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(pair? (cdr expr)))
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(or (and (symbol? (cadr expr))
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(list (cadr expr)))
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(and (pair? (cadr expr))
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(symbol? (caadr expr))
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(list (caadr expr)))
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()))
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((eq? (car expr) 'begin)
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(apply append (map get-defined-vars- (cdr expr))))
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(else ())))))
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(set! get-defined-vars
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(lambda (expr) (delete-duplicates (get-defined-vars- expr)))))
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; redefine f-body to support internal define
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(let ((f-body- f-body))
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(set! f-body
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(lambda (e)
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((lambda (B)
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((lambda (V)
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(if (null? V)
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B
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(cons (list 'lambda V B) (map (lambda (x) #f) V))))
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(get-defined-vars B)))
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(f-body- e)))))
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; backquote -------------------------------------------------------------------
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(define (revappend l1 l2) (nconc (reverse l1) l2))
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(define (nreconc l1 l2) (nconc (nreverse l1) l2))
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(define (self-evaluating? x)
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(or (and (atom? x)
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(not (symbol? x)))
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(and (constant? x)
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(eq x (eval x)))))
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(define-macro (backquote x) (bq-process x))
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(define (splice-form? x)
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(or (and (pair? x) (or (eq (car x) '*comma-at*)
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(eq (car x) '*comma-dot*)))
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(eq x '*comma*)))
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(define (bq-process x)
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(cond ((self-evaluating? x)
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(if (vector? x)
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(let ((body (bq-process (vector->list x))))
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(if (eq (car body) 'list)
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(cons vector (cdr body))
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(list apply vector body)))
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x))
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((atom? x) (list 'quote x))
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((eq (car x) 'backquote) (bq-process (bq-process (cadr x))))
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((eq (car x) '*comma*) (cadr x))
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((not (any splice-form? x))
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(let ((lc (lastcdr x))
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(forms (map bq-bracket1 x)))
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(if (null? lc)
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(cons 'list forms)
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(nconc (cons 'nlist* forms) (list (bq-process lc))))))
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(#t (let ((p x) (q ()))
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(while (and (pair? p)
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(not (eq (car p) '*comma*)))
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(set! q (cons (bq-bracket (car p)) q))
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(set! p (cdr p)))
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(let ((forms
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(cond ((pair? p) (nreconc q (list (cadr p))))
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((null? p) (nreverse q))
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(#t (nreconc q (list (bq-process p)))))))
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(if (null? (cdr forms))
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(car forms)
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(cons 'nconc forms)))))))
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(define (bq-bracket x)
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(cond ((atom? x) (list list (bq-process x)))
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((eq (car x) '*comma*) (list list (cadr x)))
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((eq (car x) '*comma-at*) (list 'copy-list (cadr x)))
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((eq (car x) '*comma-dot*) (cadr x))
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(#t (list list (bq-process x)))))
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; bracket without splicing
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(define (bq-bracket1 x)
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(if (and (pair? x) (eq (car x) '*comma*))
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(cadr x)
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(bq-process x)))
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; standard macros -------------------------------------------------------------
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(define (quote-value v)
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(if (self-evaluating? v)
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v
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(list 'quote v)))
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(define-macro (let* binds . body)
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(if (atom? binds) (f-body body)
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`((lambda (,(caar binds))
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(let* ,(cdr binds) ,@body))
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,(cadar binds))))
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(define-macro (when c . body) (list 'if c (f-body body) #f))
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(define-macro (unless c . body) (list 'if c #f (f-body body)))
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(define-macro (case key . clauses)
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(define (vals->cond key v)
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(cond ((eq? v 'else) 'else)
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((null? v) #f)
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((atom? v) `(eqv? ,key ,(quote-value v)))
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((null? (cdr v)) `(eqv? ,key ,(quote-value (car v))))
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(else `(memv ,key ',v))))
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(let ((g (gensym)))
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`(let ((,g ,key))
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(cond ,@(map (lambda (clause)
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(cons (vals->cond g (car clause))
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(cdr clause)))
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clauses)))))
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(define-macro (do vars test-spec . commands)
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(let ((loop (gensym))
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(test-expr (car test-spec))
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(vars (map car vars))
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(inits (map cadr vars))
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(steps (map (lambda (x)
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(if (pair? (cddr x))
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(caddr x)
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(car x)))
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vars)))
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`(letrec ((,loop (lambda ,vars
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(if ,test-expr
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(begin
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,@(cdr test-spec))
|
||
(begin
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||
,@commands
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||
(,loop ,@steps))))))
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||
(,loop ,@inits))))
|
||
|
||
(define-macro (dotimes var . body)
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(let ((v (car var))
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||
(cnt (cadr var)))
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||
`(for 0 (- ,cnt 1)
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(lambda (,v) ,(f-body body)))))
|
||
|
||
(define (map-int f n)
|
||
(if (<= n 0)
|
||
()
|
||
(let ((first (cons (f 0) ()))
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||
(acc ()))
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||
(set! acc first)
|
||
(for 1 (- n 1)
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||
(lambda (i)
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||
(begin (set-cdr! acc (cons (f i) ()))
|
||
(set! acc (cdr acc)))))
|
||
first)))
|
||
|
||
(define (iota n) (map-int identity n))
|
||
(define ι iota)
|
||
|
||
(define (for-each f l)
|
||
(if (pair? l)
|
||
(begin (f (car l))
|
||
(for-each f (cdr l)))
|
||
#t))
|
||
|
||
; exceptions ------------------------------------------------------------------
|
||
|
||
(define (error . args) (raise (cons 'error args)))
|
||
|
||
(define-macro (throw tag value) `(raise (list 'thrown-value ,tag ,value)))
|
||
(define-macro (catch tag expr)
|
||
(let ((e (gensym)))
|
||
`(trycatch ,expr
|
||
(lambda (,e) (if (and (pair? ,e)
|
||
(eq (car ,e) 'thrown-value)
|
||
(eq (cadr ,e) ,tag))
|
||
(caddr ,e)
|
||
(raise ,e))))))
|
||
|
||
(define-macro (unwind-protect expr finally)
|
||
(let ((e (gensym)))
|
||
`(prog1 (trycatch ,expr
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||
(lambda (,e) (begin ,finally (raise ,e))))
|
||
,finally)))
|
||
|
||
; debugging utilities ---------------------------------------------------------
|
||
|
||
(define-macro (assert expr) `(if ,expr #t (raise '(assert-failed ,expr))))
|
||
|
||
(define (trace sym)
|
||
(let* ((lam (eval sym))
|
||
(args (cadr lam))
|
||
(al (to-proper args)))
|
||
(if (not (eq? (car lam) 'trace-lambda))
|
||
(set sym
|
||
`(trace-lambda ,args
|
||
(begin
|
||
(princ "(")
|
||
(print ',sym)
|
||
,@(map (lambda (a)
|
||
`(begin (princ " ")
|
||
(print ,a)))
|
||
al)
|
||
(princ ")\n")
|
||
(',lam ,@al))))))
|
||
'ok)
|
||
|
||
(define (untrace sym)
|
||
(let ((lam (eval sym)))
|
||
(if (eq? (car lam) 'trace-lambda)
|
||
(set sym
|
||
(cadr (caar (last-pair (caddr lam))))))))
|
||
|
||
(define-macro (time expr)
|
||
(let ((t0 (gensym)))
|
||
`(let ((,t0 (time.now)))
|
||
(prog1
|
||
,expr
|
||
(princ "Elapsed time: " (- (time.now) ,t0) " seconds\n")))))
|
||
|
||
; text I/O --------------------------------------------------------------------
|
||
|
||
(if (or (eq? *os-name* 'win32)
|
||
(eq? *os-name* 'win64)
|
||
(eq? *os-name* 'windows))
|
||
(begin (define *directory-separator* "\\")
|
||
(define *linefeed* "\r\n"))
|
||
(begin (define *directory-separator* "/")
|
||
(define *linefeed* "\n")))
|
||
|
||
(define *output-stream* *stdout*)
|
||
(define *input-stream* *stdin*)
|
||
(define (print . args) (apply io.print (cons *output-stream* args)))
|
||
(define (princ . args) (apply io.princ (cons *output-stream* args)))
|
||
|
||
(define (newline) (princ *linefeed*) #t)
|
||
(define (display x) (princ x) #t)
|
||
(define (println . args) (prog1 (apply print args) (newline)))
|
||
|
||
(define (io.readline s) (io.readuntil s #\x0a))
|
||
|
||
; vector functions ------------------------------------------------------------
|
||
|
||
(define (list->vector l) (apply vector l))
|
||
(define (vector->list v)
|
||
(let ((n (length v))
|
||
(l ()))
|
||
(for 1 n
|
||
(lambda (i)
|
||
(set! l (cons (aref v (- n i)) l))))
|
||
l))
|
||
|
||
(define (vu8 . elts) (apply array (cons 'uint8 elts)))
|
||
|
||
(define (vector.map f v)
|
||
(let* ((n (length v))
|
||
(nv (vector.alloc n)))
|
||
(for 0 (- n 1)
|
||
(lambda (i)
|
||
(aset! nv i (f (aref v i)))))
|
||
nv))
|
||
|
||
; table functions -------------------------------------------------------------
|
||
|
||
(define (table.pairs t)
|
||
(table.foldl (lambda (k v z) (cons (cons k v) z))
|
||
() t))
|
||
(define (table.keys t)
|
||
(table.foldl (lambda (k v z) (cons k z))
|
||
() t))
|
||
(define (table.values t)
|
||
(table.foldl (lambda (k v z) (cons v z))
|
||
() t))
|
||
(define (table.clone t)
|
||
(let ((nt (table)))
|
||
(table.foldl (lambda (k v z) (put! nt k v))
|
||
() t)
|
||
nt))
|
||
(define (table.invert t)
|
||
(let ((nt (table)))
|
||
(table.foldl (lambda (k v z) (put! nt v k))
|
||
() t)
|
||
nt))
|
||
(define (table.foreach f t)
|
||
(table.foldl (lambda (k v z) (begin (f k v) #t)) () t))
|
||
|
||
; string functions ------------------------------------------------------------
|
||
|
||
(define (string.tail s n)
|
||
(string.sub s (string.inc s 0 n) (sizeof s)))
|
||
|
||
(define *whitespace*
|
||
(string.encode #array(wchar 9 10 11 12 13 32 133 160 5760 6158 8192
|
||
8193 8194 8195 8196 8197 8198 8199 8200
|
||
8201 8202 8232 8233 8239 8287 12288)))
|
||
|
||
(define (string.trim s at-start at-end)
|
||
(define (trim-start s chars i L)
|
||
(if (and (< i L)
|
||
(string.find chars (string.char s i)))
|
||
(trim-start s chars (string.inc s i) L)
|
||
i))
|
||
(define (trim-end s chars i)
|
||
(if (and (> i 0)
|
||
(string.find chars (string.char s (string.dec s i))))
|
||
(trim-end s chars (string.dec s i))
|
||
i))
|
||
(let ((L (length s)))
|
||
(string.sub s
|
||
(trim-start s at-start 0 L)
|
||
(trim-end s at-end L))))
|
||
|
||
(define (string.map f s)
|
||
(let ((b (buffer))
|
||
(n (length s)))
|
||
(let ((i 0))
|
||
(while (< i n)
|
||
(begin (io.putc b (f (string.char s i)))
|
||
(set! i (string.inc s i)))))
|
||
(io.tostring! b)))
|
||
|
||
(define (string.rep s k)
|
||
(cond ((< k 4)
|
||
(cond ((<= k 0) "")
|
||
((= k 1) (string s))
|
||
((= k 2) (string s s))
|
||
(else (string s s s))))
|
||
((odd? k) (string s (string.rep s (- k 1))))
|
||
(else (string.rep (string s s) (/ k 2)))))
|
||
|
||
(define (pad-l s n c) (string (string.rep c (- n (length s))) s))
|
||
(define (pad-r s n c) (string s (string.rep c (- n (length s)))))
|
||
|
||
(define (print-to-string v)
|
||
(let ((b (buffer)))
|
||
(io.print b v)
|
||
(io.tostring! b)))
|
||
|
||
; toplevel --------------------------------------------------------------------
|
||
|
||
(define (macrocall? e) (and (symbol? (car e))
|
||
(symbol-syntax (car e))))
|
||
|
||
(define (macroexpand-1 e)
|
||
(if (atom? e) e
|
||
(let ((f (macrocall? e)))
|
||
(if f (apply f (cdr e))
|
||
e))))
|
||
|
||
(define (macroexpand e) (macroexpand-in e ()))
|
||
|
||
(define (macroexpand-in e env)
|
||
(if (atom? e) e
|
||
(let ((f (assq (car e) env)))
|
||
(if f
|
||
(macroexpand-in (apply (cadr f) (cdr e)) (caddr f))
|
||
(let ((f (macrocall? e)))
|
||
(if f
|
||
(macroexpand-in (apply f (cdr e)) env)
|
||
(cond ((eq (car e) 'quote) e)
|
||
((eq (car e) 'lambda)
|
||
(nlist* 'lambda (cadr e)
|
||
(macroexpand-in (caddr e) env)
|
||
(cdddr e)))
|
||
((eq (car e) 'let-syntax)
|
||
(let ((binds (cadr e))
|
||
(body (f-body (cddr e))))
|
||
(macroexpand-in
|
||
body
|
||
(nconc
|
||
(map (lambda (bind)
|
||
(list (car bind)
|
||
(macroexpand-in (cadr bind) env)
|
||
env))
|
||
binds)
|
||
env))))
|
||
(else
|
||
(map (lambda (x) (macroexpand-in x env)) e)))))))))
|
||
|
||
(define (expand x) (macroexpand x))
|
||
|
||
(define (load-process x) (eval (expand x)))
|
||
|
||
(define (load filename)
|
||
(let ((F (file filename :read)))
|
||
(trycatch
|
||
(let next (prev E v)
|
||
(if (not (io.eof? F))
|
||
(next (read F)
|
||
prev
|
||
(load-process E))
|
||
(begin (io.close F)
|
||
; evaluate last form in almost-tail position
|
||
(load-process E))))
|
||
(lambda (e)
|
||
(begin
|
||
(io.close F)
|
||
(raise `(load-error ,filename ,e)))))))
|
||
|
||
;(load (string *install-dir* *directory-separator* "compiler.lsp"))
|
||
;(define (load-process x) ((compile-thunk (expand x))))
|
||
|
||
(define *banner* (string.tail "
|
||
; _
|
||
; |_ _ _ |_ _ | . _ _
|
||
; | (-||||_(_)|__|_)|_)
|
||
;-------------------|----------------------------------------------------------
|
||
|
||
" 1))
|
||
|
||
(define (repl)
|
||
(define (prompt)
|
||
(princ "> ") (io.flush *output-stream*)
|
||
(let ((v (trycatch (read)
|
||
(lambda (e) (begin (io.discardbuffer *input-stream*)
|
||
(raise e))))))
|
||
(and (not (io.eof? *input-stream*))
|
||
(let ((V (eval (expand v))))
|
||
(print V)
|
||
(set! that V)
|
||
#t))))
|
||
(define (reploop)
|
||
(when (trycatch (and (prompt) (newline))
|
||
(lambda (e) (print-exception e)))
|
||
(begin (newline)
|
||
(reploop))))
|
||
(reploop)
|
||
(newline))
|
||
|
||
(define (print-exception e)
|
||
(cond ((and (pair? e)
|
||
(eq? (car e) 'type-error)
|
||
(length= e 4))
|
||
(io.princ *stderr*
|
||
"type-error: " (cadr e) ": expected " (caddr e) ", got ")
|
||
(io.print *stderr* (cadddr e)))
|
||
|
||
((and (pair? e)
|
||
(eq? (car e) 'unbound-error)
|
||
(pair? (cdr e)))
|
||
(io.princ *stderr*
|
||
"unbound-error: eval: variable " (cadr e)
|
||
" has no value"))
|
||
|
||
((and (pair? e)
|
||
(eq? (car e) 'error))
|
||
(io.princ *stderr* "error: ")
|
||
(apply io.princ (cons *stderr* (cdr e))))
|
||
|
||
((and (pair? e)
|
||
(eq? (car e) 'load-error))
|
||
(print-exception (caddr e))
|
||
(io.princ *stderr* "in file " (cadr e)))
|
||
|
||
((and (list? e)
|
||
(length= e 2))
|
||
(io.princ *stderr* (car e) ": ")
|
||
(let ((msg (cadr e)))
|
||
((if (or (string? msg) (symbol? msg))
|
||
io.princ io.print)
|
||
*stderr* msg)))
|
||
|
||
(else (io.princ *stderr* "*** Unhandled exception: ")
|
||
(io.print *stderr* e)))
|
||
|
||
(io.princ *stderr* *linefeed*)
|
||
#t)
|
||
|
||
(define (__script fname)
|
||
(trycatch (load fname)
|
||
(lambda (e) (begin (print-exception e)
|
||
(exit 1)))))
|
||
|
||
(define (__start . argv)
|
||
; reload this file with our new definition of load
|
||
(load (string *install-dir* *directory-separator* "system.lsp"))
|
||
(if (pair? (cdr argv))
|
||
(begin (set! *argv* (cdr argv))
|
||
(__script (cadr argv)))
|
||
(begin (set! *argv* argv)
|
||
(princ *banner*)
|
||
(repl)))
|
||
(exit 0))
|