X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_const.lisp;h=5c1aa75be79f983bfdab5c019286feea9c82ac3a;hb=835bf4131f9e20575bfdf2179462ebdf54a14761;hp=aa356d450aeeaa87d5860ec5948a37dec69cf77c;hpb=d2408e72d1e0d3459918601712b09860ab17e200;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_const.lisp b/src/lisp/ao_lisp_const.lisp
index aa356d45..5c1aa75b 100644
--- a/src/lisp/ao_lisp_const.lisp
+++ b/src/lisp/ao_lisp_const.lisp
@@ -1 +1,797 @@
-cadr (lambda (l) (car (cdr l)))
+;
+; Copyright © 2016 Keith Packard <keithp@keithp.com>
+;
+; This program is free software; you can redistribute it and/or modify
+; it under the terms of the GNU General Public License as published by
+; the Free Software Foundation, either version 2 of the License, or
+; (at your option) any later version.
+;
+; This program is distributed in the hope that it will be useful, but
+; WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; General Public License for more details.
+;
+; Lisp code placed in ROM
+
+					; return a list containing all of the arguments
+(set (quote list) (lexpr (l) l))
+
+(set (quote set!)
+     (macro (name value rest)
+	    (list
+	     set
+	     (list
+	      quote
+	      name)
+	     value)
+	    )
+     )
+
+(set! append
+     (lexpr (args)
+	    ((lambda (append-list append-lists)
+	       (set! append-list
+		    (lambda (a b)
+		      (cond ((null? a) b)
+			    (else (cons (car a) (append-list (cdr a) b)))
+			    )
+		      )
+		    )
+	       (set! append-lists
+		    (lambda (lists)
+		      (cond ((null? lists) lists)
+			    ((null? (cdr lists)) (car lists))
+			    (else (append-list (car lists) (append-lists (cdr lists))))
+			    )
+		      )
+		    )
+	       (append-lists args)
+	       ) () ())
+	    )
+     )
+
+(append '(a b c) '(d e f) '(g h i))
+
+					; boolean operators
+
+(set! or
+     (macro (l)
+	    ((lambda (_or)
+	       (set! _or
+		    (lambda (l)
+		      (cond ((null? l) #f)
+			    ((null? (cdr l))
+			     (car l))
+			    (else
+			     (list
+			      cond
+			      (list
+			       (car l))
+			      (list
+			       'else
+			       (_or (cdr l))
+			       )
+			      )
+			     )
+			    )
+		      )
+		    )
+	       (_or l)) ())))
+
+					; execute to resolve macros
+
+(or #f #t)
+
+
+(set! and
+     (macro (l)
+	    ((lambda (_and)
+	       (set! _and
+		    (lambda (l)
+		      (cond ((null? l) #t)
+			    ((null? (cdr l))
+			     (car l))
+			    (else
+			     (list
+			      cond
+			      (list
+			       (car l)
+			       (_and (cdr l))
+			       )
+			      )
+			     )
+			    )
+		      )
+		    )
+	       (_and l)) ())
+	    )
+     )
+
+
+					; execute to resolve macros
+
+(and #t #f)
+
+(set! quasiquote
+  (macro (x rest)
+	 ((lambda (constant? combine-skeletons expand-quasiquote)
+	    (set! constant?
+					; A constant value is either a pair starting with quote,
+					; or anything which is neither a pair nor a symbol
+
+		 (lambda (exp)
+		   (cond ((pair? exp)
+			  (eq? (car exp) 'quote)
+			  )
+			 (else
+			  (not (symbol? exp))
+			  )
+			 )
+		   )
+		 )
+	    (set! combine-skeletons
+		 (lambda (left right exp)
+		   (cond
+		    ((and (constant? left) (constant? right)) 
+		     (cond ((and (eqv? (eval left) (car exp))
+				 (eqv? (eval right) (cdr exp)))
+			    (list 'quote exp)
+			    )
+			   (else
+			    (list 'quote (cons (eval left) (eval right)))
+			    )
+			   )
+		     )
+		    ((null? right)
+		     (list 'list left)
+		     )
+		    ((and (pair? right) (eq? (car right) 'list))
+		     (cons 'list (cons left (cdr right)))
+		     )
+		    (else
+		     (list 'cons left right)
+		     )
+		    )
+		   )
+		 )
+
+	    (set! expand-quasiquote
+		 (lambda (exp nesting)
+		   (cond
+
+					; non cons -- constants
+					; themselves, others are
+					; quoted
+
+		    ((not (pair? exp)) 
+		     (cond ((constant? exp)
+			    exp
+			    )
+			   (else
+			    (list 'quote exp)
+			    )
+			   )
+		     )
+
+					; check for an unquote exp and
+					; add the param unquoted
+
+		    ((and (eq? (car exp) 'unquote) (= (length exp) 2))
+		     (cond ((= nesting 0)
+			    (car (cdr exp))
+			    )
+			   (else
+			    (combine-skeletons ''unquote 
+					       (expand-quasiquote (cdr exp) (- nesting 1))
+					       exp))
+			   )
+		     )
+
+					; nested quasi-quote --
+					; construct the right
+					; expression
+
+		    ((and (eq? (car exp) 'quasiquote) (= (length exp) 2))
+		     (combine-skeletons ''quasiquote 
+					(expand-quasiquote (cdr exp) (+ nesting 1))
+					exp))
+
+					; check for an
+					; unquote-splicing member,
+					; compute the expansion of the
+					; value and append the rest of
+					; the quasiquote result to it
+
+		    ((and (pair? (car exp))
+			  (eq? (car (car exp)) 'unquote-splicing)
+			  (= (length (car exp)) 2))
+		     (cond ((= nesting 0)
+			    (list 'append (car (cdr (car exp)))
+				  (expand-quasiquote (cdr exp) nesting))
+			    )
+			   (else
+			    (combine-skeletons (expand-quasiquote (car exp) (- nesting 1))
+					       (expand-quasiquote (cdr exp) nesting)
+					       exp))
+			   )
+		     )
+
+					; for other lists, just glue
+					; the expansion of the first
+					; element to the expansion of
+					; the rest of the list
+
+		    (else (combine-skeletons (expand-quasiquote (car exp) nesting)
+					     (expand-quasiquote (cdr exp) nesting)
+					     exp)
+			  )
+		    )
+		   )
+		 )
+	    (expand-quasiquote x 0)
+	    ) () () ())
+	 )
+  )
+					;
+					; Define a variable without returning the value
+					; Useful when defining functions to avoid
+					; having lots of output generated.
+					;
+					; Also accepts the alternate
+					; form for defining lambdas of
+					; (define (name x y z) sexprs ...) 
+					;
+
+(set! define
+      (macro (first rest)
+
+					; check for alternate lambda definition form
+
+	     (cond ((list? first)
+		    (set! rest
+			  (append
+			   (list
+			    'lambda
+			    (cdr first))
+			   rest))
+		    (set! first (car first))
+		    )
+		   (else
+		    (set! rest (car rest))
+		    )
+		   )
+	     `(begin
+	       (set! ,first ,rest)
+	       (quote ,first))
+	     )
+      )
+
+					; basic list accessors
+
+
+(define (caar l) (car (car l)))
+
+(define (cadr l) (car (cdr l)))
+
+(define (cdar l) (cdr (car l)))
+
+(define (caddr l) (car (cdr (cdr l))))
+
+(define (list-tail x k)
+  (if (zero? k)
+      x
+    (list-tail (cdr x (- k 1)))
+    )
+  )
+
+(define (list-ref x k)
+  (car (list-tail x k))
+  )
+
+					; (if <condition> <if-true>)
+					; (if <condition> <if-true> <if-false)
+
+(define if
+  (macro (test args)
+	 (cond ((null? (cdr args))
+		`(cond (,test ,(car args)))
+		)
+	       (else
+		`(cond (,test ,(car args))
+		       (else ,(cadr args)))
+		)
+	       )
+	 )
+  )
+
+(if (> 3 2) 'yes)
+(if (> 3 2) 'yes 'no)
+(if (> 2 3) 'no 'yes)
+(if (> 2 3) 'no)
+
+					; simple math operators
+
+(define zero? (macro (value rest) `(eq? ,value 0)))
+
+(zero? 1)
+(zero? 0)
+(zero? "hello")
+
+(define positive? (macro (value rest) `(> ,value 0)))
+
+(positive? 12)
+(positive? -12)
+
+(define negative? (macro (value rest) `(< ,value 0)))
+
+(negative? 12)
+(negative? -12)
+
+(define (abs x) (if (>= x 0) x (- x)))
+
+(abs 12)
+(abs -12)
+
+(define max (lexpr (first rest)
+		   (while (not (null? rest))
+		     (cond ((< first (car rest))
+			    (set! first (car rest)))
+			   )
+		     (set! rest (cdr rest))
+		     )
+		   first)
+  )
+
+(max 1 2 3)
+(max 3 2 1)
+
+(define min (lexpr (first rest)
+		   (while (not (null? rest))
+		     (cond ((> first (car rest))
+			    (set! first (car rest)))
+			   )
+		     (set! rest (cdr rest))
+		     )
+		   first)
+  )
+
+(min 1 2 3)
+(min 3 2 1)
+
+(define (even? x) (zero? (% x 2)))
+
+(even? 2)
+(even? -2)
+(even? 3)
+(even? -1)
+
+(define (odd? x) (not (even? x)))
+
+(odd? 2)
+(odd? -2)
+(odd? 3)
+(odd? -1)
+
+
+					; define a set of local
+					; variables all at once and
+					; then evaluate a list of
+					; sexprs
+					;
+					; (let (var-defines) sexprs)
+					;
+					; where var-defines are either
+					;
+					; (name value)
+					;
+					; or
+					;
+					; (name)
+					;
+					; e.g.
+					;
+					; (let ((x 1) (y)) (set! y (+ x 1)) y)
+
+(define let (macro (vars exprs)
+		((lambda (make-names make-vals)
+
+					;
+					; make the list of names in the let
+					;
+
+		   (set! make-names (lambda (vars)
+				      (cond ((not (null? vars))
+					     (cons (car (car vars))
+						   (make-names (cdr vars))))
+					    (else ())
+					    )
+				      )
+			 )
+
+					; the parameters to the lambda is a list
+					; of nils of the right length
+
+		   (set! make-vals (lambda (vars)
+				     (cond ((not (null? vars))
+					    (cons (cond ((null? (cdr (car vars))) ())
+							(else
+							 (car (cdr (car vars))))
+							)
+						  (make-vals (cdr vars))))
+					   (else ())
+					   )
+				     )
+			 )
+					; prepend the set operations
+					; to the expressions
+
+					; build the lambda.
+
+		   `((lambda ,(make-names vars) ,@exprs) ,@(make-vals vars))
+		   )
+		 ()
+		 ()
+		 )
+		)
+     )
+		   
+
+(let ((x 1) (y)) (set! y 2) (+ x y))
+
+					; define a set of local
+					; variables one at a time and
+					; then evaluate a list of
+					; sexprs
+					;
+					; (let* (var-defines) sexprs)
+					;
+					; where var-defines are either
+					;
+					; (name value)
+					;
+					; or
+					;
+					; (name)
+					;
+					; e.g.
+					;
+					; (let* ((x 1) (y)) (set! y (+ x 1)) y)
+
+(define let* (macro (vars exprs)
+		((lambda (make-names make-exprs make-nils)
+
+					;
+					; make the list of names in the let
+					;
+
+		   (set! make-names (lambda (vars)
+				      (cond ((not (null? vars))
+					     (cons (car (car vars))
+						   (make-names (cdr vars))))
+					    (else ())
+					    )
+				      )
+			 )
+
+					; the set of expressions is
+					; the list of set expressions
+					; pre-pended to the
+					; expressions to evaluate
+
+		   (set! make-exprs (lambda (vars exprs)
+				      (cond ((not (null? vars))
+					     (cons
+					      (list set
+						    (list quote
+							  (car (car vars))
+							  )
+						    (cond ((null? (cdr (car vars))) ())
+							  (else (cadr (car vars))))
+						    )
+					      (make-exprs (cdr vars) exprs)
+					      )
+					     )
+					    (else exprs)
+					    )
+				      )
+			 )
+
+					; the parameters to the lambda is a list
+					; of nils of the right length
+
+		   (set! make-nils (lambda (vars)
+				     (cond ((not (null? vars)) (cons () (make-nils (cdr vars))))
+					   (else ())
+					   )
+				     )
+			 )
+					; prepend the set operations
+					; to the expressions
+
+		   (set! exprs (make-exprs vars exprs))
+
+					; build the lambda.
+
+		   `((lambda ,(make-names vars) ,@exprs) ,@(make-nils vars))
+		   )
+		 ()
+		 ()
+		 ()
+		 )
+		)
+     )
+
+(let* ((x 1)) x)
+
+(define when (macro (test l) `(cond (,test ,@l))))
+
+(when #t (write 'when))
+
+(define unless (macro (test l) `(cond ((not ,test) ,@l))))
+
+(unless #f (write 'unless))
+
+(define (reverse list)
+  (let ((result ()))
+    (while (not (null? list))
+      (set! result (cons (car list) result))
+      (set! list (cdr list))
+      )
+    result)
+  )
+
+(reverse '(1 2 3))
+
+(define (list-tail x k)
+  (if (zero? k)
+      x
+    (list-tail (cdr x) (- k 1)))))
+
+(list-tail '(1 2 3) 2)
+
+(define (list-ref x k) (car (list-tail x k)))
+
+(list-ref '(1 2 3) 2)
+    
+					; recursive equality
+
+(define (equal? a b)
+  (cond ((eq? a b) #t)
+	((and (pair? a) (pair? b))
+	 (and (equal? (car a) (car b))
+	      (equal? (cdr a) (cdr b)))
+	 )
+	(else #f)
+	)
+  )
+
+(equal? '(a b c) '(a b c))
+(equal? '(a b c) '(a b b))
+
+(define member (lexpr (obj list test?)
+		      (cond ((null? list)
+			     #f
+			     )
+			    (else
+			     (if (null? test?) (set! test? equal?) (set! test? (car test?)))
+			     (if (test? obj (car list))
+				 list
+			       (member obj (cdr list) test?))
+			     )
+			    )
+		      )
+  )
+
+(member '(2) '((1) (2) (3)))
+
+(member '(4) '((1) (2) (3)))
+
+(define (memq obj list) (member obj list eq?))
+
+(memq 2 '(1 2 3))
+
+(memq 4 '(1 2 3))
+
+(memq '(2) '((1) (2) (3)))
+
+(define (memv obj list) (member obj list eqv?))
+
+(memv 2 '(1 2 3))
+
+(memv 4 '(1 2 3))
+
+(memv '(2) '((1) (2) (3)))
+
+(define (_assoc obj list test?)
+  (if (null? list)
+      #f
+    (if (test? obj (caar list))
+	(car list)
+      (_assoc obj (cdr list) test?)
+      )
+    )
+  )
+
+(define (assq obj list) (_assoc obj list eq?))
+(define (assv obj list) (_assoc obj list eqv?))
+(define (assoc obj list) (_assoc obj list equal?))
+
+(assq 'a '((a 1) (b 2) (c 3)))
+(assv 'b '((a 1) (b 2) (c 3)))
+(assoc '(c) '((a 1) (b 2) ((c) 3)))
+
+(define char? integer?)
+
+(char? #\q)
+(char? "h")
+
+(define (char-upper-case? c) (<= #\A c #\Z))
+
+(char-upper-case? #\a)
+(char-upper-case? #\B)
+(char-upper-case? #\0)
+(char-upper-case? #\space)
+
+(define (char-lower-case? c) (<= #\a c #\a))
+
+(char-lower-case? #\a)
+(char-lower-case? #\B)
+(char-lower-case? #\0)
+(char-lower-case? #\space)
+
+(define (char-alphabetic? c) (or (char-upper-case? c) (char-lower-case? c)))
+
+(char-alphabetic? #\a)
+(char-alphabetic? #\B)
+(char-alphabetic? #\0)
+(char-alphabetic? #\space)
+
+(define (char-numeric? c) (<= #\0 c #\9))
+
+(char-numeric? #\a)
+(char-numeric? #\B)
+(char-numeric? #\0)
+(char-numeric? #\space)
+
+(define (char-whitespace? c) (or (<= #\tab c #\return) (= #\space c)))
+
+(char-whitespace? #\a)
+(char-whitespace? #\B)
+(char-whitespace? #\0)
+(char-whitespace? #\space)
+
+(define (char->integer c) c)
+(define (integer->char c) char-integer)
+
+(define (char-upcase c) (if (char-lower-case? c) (+ c (- #\A #\a)) c))
+
+(char-upcase #\a)
+(char-upcase #\B)
+(char-upcase #\0)
+(char-upcase #\space)
+
+(define (char-downcase c) (if (char-upper-case? c) (+ c (- #\a #\A)) c))
+
+(char-downcase #\a)
+(char-downcase #\B)
+(char-downcase #\0)
+(char-downcase #\space)
+
+(define string (lexpr (chars) (list->string chars)))
+
+(display "apply\n")
+(apply cons '(a b))
+
+(define map (lexpr (proc lists)
+		   (let* ((args (lambda (lists)
+				  (if (null? lists) ()
+				    (cons (caar lists) (args (cdr lists))))))
+			  (next (lambda (lists)
+				  (if (null? lists) ()
+				    (cons (cdr (car lists)) (next (cdr lists))))))
+			  (domap (lambda (lists)
+				   (if (null? (car lists)) ()
+				     (cons (apply proc (args lists)) (domap (next lists)))
+				     )))
+			  )
+		     (domap lists))))
+
+(map cadr '((a b) (d e) (g h)))
+
+(define for-each (lexpr (proc lists)
+			(apply map proc lists)
+			#t))
+
+(for-each display '("hello" " " "world" "\n"))
+
+(define _string-ml (lambda (strings)
+			     (if (null? strings) ()
+			       (cons (string->list (car strings)) (_string-ml (cdr strings))))))
+
+(define string-map (lexpr (proc strings)
+			  (list->string (apply map proc (_string-ml strings))))))
+
+(string-map (lambda (x) (+ 1 x)) "HAL")
+
+(define string-for-each (lexpr (proc strings)
+			       (apply for-each proc (_string-ml strings))))
+
+(string-for-each write-char "IBM\n")
+
+(define newline (lambda () (write-char #\newline)))
+
+(newline)
+
+(call-with-current-continuation
+ (lambda (exit)
+   (for-each (lambda (x)
+	       (write "test" x)
+	       (if (negative? x)
+		   (exit x)))
+	     '(54 0 37 -3 245 19))
+   #t))
+
+
+					; `q -> (quote q)
+					; `(q) -> (append (quote (q)))
+					; `(a ,(+ 1 2)) -> (append (quote (a)) (list (+ 1 2)))
+					; `(a ,@(list 1 2 3) -> (append (quote (a)) (list 1 2 3))
+
+
+
+`(hello ,(+ 1 2) ,@(list 1 2 3) `foo)
+
+(define repeat (macro (count rest)
+		       `(let ((__count__ ,count))
+			  (while (<= 0 (set! __count__ (- __count__ 1))) ,@rest))))
+
+(repeat 2 (write 'hello))
+(repeat 3 (write 'goodbye))
+
+(define case (macro (test l)
+		    (let* ((_unarrow
+					; construct the body of the
+					; case, dealing with the
+					; lambda version ( => lambda)
+			    
+			    (lambda (l)
+			      (cond ((null? l) l)
+				    ((eq? (car l) '=>) `(( ,(cadr l) __key__)))
+				    (else l))))
+			   (_case (lambda (l)
+
+					; Build the case elements, which is
+					; simply a list of cond clauses
+
+				    (cond ((null? l) ())
+
+					; else case
+
+					  ((eq? (caar l) 'else)
+					   `((else ,@(_unarrow (cdr (car l))))))
+
+					; regular case
+					  
+					  (else
+					   (cons
+					    `((eqv? ,(caar l) __key__)
+					      ,@(_unarrow (cdr (car l))))
+					    (_case (cdr l)))
+					   )
+					  ))))
+
+					; now construct the overall
+					; expression, using a lambda
+					; to hold the computed value
+					; of the test expression
+
+		      `((lambda (__key__)
+			  (cond ,@(_case l))) ,test))))
+
+(case 12 (1 "one") (2 "two") (3 => (lambda (x) (write "the value is" x))) (12 "twelve") (else "else"))
+
+;(define number->string (lexpr (arg opt)
+;			      (let ((base (if (null? opt) 10 (car opt)))
+					;
+;
+