+;;; lispstrack.lisp ---
+
+;; Copyright (C) 2012 David Vazquez
+;; Copyright (C) 2012 Raimon Grau
+
+;; 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 3 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.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; This code is executed when lispstrack compiles this file
+;;; itself. The compiler provides compilation of some special forms,
+;;; as well as funcalls and macroexpansion, but no functions. So, we
+;;; define the Lisp world from scratch. This code has to define enough
+;;; language to the compiler to be able to run.
+#+lispstrack
+(progn
+ (eval-when-compile
+ (%compile-defmacro 'defmacro
+ '(lambda (name args &rest body)
+ `(eval-when-compile
+ (%compile-defmacro ',name '(lambda ,args ,@body))))))
+
+ (defmacro %defvar (name value)
+ `(progn
+ (eval-when-compile
+ (%compile-defvar ',name))
+ (setq ,name ,value)))
+
+ (defmacro defvar (name value)
+ `(%defvar ,name ,value))
+
+ (defmacro %defun (name args &rest body)
+ `(progn
+ (eval-when-compile
+ (%compile-defun ',name))
+ (fsetq ,name (lambda ,args ,@body))))
+
+ (defmacro defun (name args &rest body)
+ `(%defun ,name ,args ,@body))
+
+ (defvar *package* (new))
+
+ (defvar nil (make-symbol "NIL"))
+ (set *package* "NIL" nil)
+
+ (defvar t (make-symbol "T"))
+ (set *package* "T" t)
+
+ (defun internp (name)
+ (in name *package*))
+
+ (defun intern (name)
+ (if (internp name)
+ (get *package* name)
+ (set *package* name (make-symbol name))))
+
+ (defun find-symbol (name)
+ (get *package* name))
+
+ (defmacro when (condition &rest body)
+ `(if ,condition (progn ,@body) nil))
+
+ (defmacro unless (condition &rest body)
+ `(if ,condition nil (progn ,@body)))
+
+ (defmacro dolist (iter &rest body)
+ (let ((var (first iter))
+ (g!list (make-symbol "LIST")))
+ `(let ((,g!list ,(second iter))
+ (,var nil))
+ (while ,g!list
+ (setq ,var (car ,g!list))
+ ,@body
+ (setq ,g!list (cdr ,g!list))))))
+
+ (defun = (x y) (= x y))
+ (defun + (x y) (+ x y))
+ (defun - (x y) (- x y))
+ (defun * (x y) (* x y))
+ (defun / (x y) (/ x y))
+ (defun 1+ (x) (+ x 1))
+ (defun 1- (x) (- x 1))
+ (defun zerop (x) (= x 0))
+ (defun not (x) (if x nil t))
+
+ (defun truncate (x y) (floor (/ x y)))
+
+ (defun cons (x y ) (cons x y))
+ (defun consp (x) (consp x))
+
+ (defun car (x) (car x))
+ (defun cdr (x) (cdr x))
+
+ (defun caar (x) (car (car x)))
+ (defun cadr (x) (car (cdr x)))
+ (defun cdar (x) (cdr (car x)))
+ (defun cddr (x) (cdr (cdr x)))
+ (defun caddr (x) (car (cdr (cdr x))))
+ (defun cdddr (x) (cdr (cdr (cdr x))))
+ (defun cadddr (x) (car (cdr (cdr (cdr x)))))
+
+ (defun first (x) (car x))
+ (defun second (x) (cadr x))
+ (defun third (x) (caddr x))
+ (defun fourth (x) (cadddr x))
+
+ (defun list (&rest args)
+ args)
+
+ (defun atom (x)
+ (not (consp x))))
+
(defun ensure-list (x)
(if (listp x)
x
(cdr list)
(funcall func initial (car list)))))
-;;; Utils
+#+lispstrack
+(progn
+ (defmacro defun (name args &rest body)
+ `(progn
+ (%defun ,name ,args ,@body)
+ ',name))
+
+ (defmacro defvar (name value)
+ `(progn
+ (%defvar ,name ,value)
+ ',name))
+
+ (defun append-two (list1 list2)
+ (if (null list1)
+ list2
+ (cons (car list1)
+ (append (cdr list1) list2))))
+
+ (defun append (&rest lists)
+ (!reduce #'append-two lists '()))
+
+ (defun reverse-aux (list acc)
+ (if (null list)
+ acc
+ (reverse-aux (cdr list) (cons (car list) acc))))
+
+ (defun reverse (list)
+ (reverse-aux list '()))
+
+ (defmacro incf (x)
+ `(setq ,x (1+ ,x)))
+
+ (defmacro decf (x)
+ `(setq ,x (1- ,x)))
+
+ (defun list-length (list)
+ (let ((l 0))
+ (while (not (null list))
+ (incf l)
+ (setq list (cdr list)))
+ l))
+
+ (defun length (seq)
+ (if (stringp seq)
+ (string-length seq)
+ (list-length seq)))
+
+ (defun mapcar (func list)
+ (if (null list)
+ '()
+ (cons (funcall func (car list))
+ (mapcar func (cdr list)))))
+
+ (defmacro push (x place)
+ `(setq ,place (cons ,x ,place)))
+
+ (defmacro cond (&rest clausules)
+ (if (null clausules)
+ nil
+ (if (eq (caar clausules) t)
+ `(progn ,@(cdar clausules))
+ `(if ,(caar clausules)
+ (progn ,@(cdar clausules))
+ (cond ,@(cdr clausules))))))
+
+ (defmacro case (form &rest clausules)
+ (let ((!form (make-symbol "FORM")))
+ `(let ((,!form ,form))
+ (cond
+ ,@(mapcar (lambda (clausule)
+ (if (eq (car clausule) t)
+ clausule
+ `((eql ,!form ,(car clausule))
+ ,@(cdr clausule))))
+ clausules)))))
+
+ (defmacro ecase (form &rest clausules)
+ `(case ,form
+ ,@(append
+ clausules
+ `((t
+ (error "ECASE expression failed."))))))
+
+ (defun code-char (x) x)
+ (defun char-code (x) x)
+ (defun char= (x y) (= x y))
+
+ (defmacro and (&rest forms)
+ (cond
+ ((null forms)
+ t)
+ ((null (cdr forms))
+ (car forms))
+ (t
+ `(if ,(car forms)
+ (and ,@(cdr forms))
+ nil))))
+
+ (defmacro or (&rest forms)
+ (cond
+ ((null forms)
+ nil)
+ ((null (cdr forms))
+ (car forms))
+ (t
+ (let ((g (make-symbol "VAR")))
+ `(let ((,g ,(car forms)))
+ (if ,g ,g (or ,@(cdr forms))))))))
+
+ (defmacro prog1 (form &rest body)
+ (let ((value (make-symbol "VALUE")))
+ `(let ((,value ,form))
+ ,@body
+ ,value)))
+
+ (defun <= (x y) (or (< x y) (= x y)))
+ (defun >= (x y) (not (< x y)))
+
+ (defun listp (x)
+ (or (consp x) (null x)))
+
+ (defun integerp (x)
+ (and (numberp x) (= (floor x) x)))
+
+ (defun last (x)
+ (if (null (cdr x))
+ x
+ (last (cdr x))))
+
+ (defun butlast (x)
+ (if (null (cdr x))
+ nil
+ (cons (car x) (butlast (cdr x)))))
+
+ (defun member (x list)
+ (cond
+ ((null list)
+ nil)
+ ((eql x (car list))
+ list)
+ (t
+ (member x (cdr list)))))
+
+ (defun remove (x list)
+ (cond
+ ((null list)
+ nil)
+ ((eql x (car list))
+ (remove x (cdr list)))
+ (t
+ (cons (car list) (remove x (cdr list))))))
+
+ (defun remove-if (func list)
+ (cond
+ ((null list)
+ nil)
+ ((funcall func (car list))
+ (remove-if func (cdr list)))
+ (t
+ (cons (car list) (remove-if func (cdr list))))))
+
+ (defun remove-if-not (func list)
+ (cond
+ ((null list)
+ nil)
+ ((funcall func (car list))
+ (cons (car list) (remove-if-not func (cdr list))))
+ (t
+ (remove-if-not func (cdr list)))))
+
+ (defun digit-char-p (x)
+ (if (and (<= #\0 x) (<= x #\9))
+ (- x #\0)
+ nil))
+
+ (defun parse-integer (string)
+ (let ((value 0)
+ (index 0)
+ (size (length string)))
+ (while (< index size)
+ (setq value (+ (* value 10) (digit-char-p (char string index))))
+ (incf index))
+ value))
+
+ (defun every (function seq)
+ ;; string
+ (let ((ret t)
+ (index 0)
+ (size (length seq)))
+ (while (and ret (< index size))
+ (unless (funcall function (char seq index))
+ (setq ret nil))
+ (incf index))
+ ret))
+
+ (defun eql (x y)
+ (eq x y))
+
+ (defun assoc (x alist)
+ (cond
+ ((null alist)
+ nil)
+ ((eql x (caar alist))
+ (car alist))
+ (t
+ (assoc x (cdr alist)))))
+
+ (defun string= (s1 s2)
+ (equal s1 s2)))
+
+;;; The compiler offers some primitives and special forms which are
+;;; not found in Common Lisp, for instance, while. So, we grow Common
+;;; Lisp a bit to it can execute the rest of the file.
#+common-lisp
(progn
(defmacro while (condition &body body)
((not ,condition))
,@body))
+ (defmacro eval-when-compile (&body body)
+ `(eval-when (:compile-toplevel :load-toplevel :execute)
+ ,@body))
+
(defun concat-two (s1 s2)
(concatenate 'string s1 s2))
(defun setcdr (cons new)
(setf (cdr cons) new)))
+
+;;; At this point, no matter if Common Lisp or lispstrack is compiling
+;;; from here, this code will compile on both. We define some helper
+;;; functions now for string manipulation and so on. They will be
+;;; useful in the compiler, mostly.
+
(defvar *newline* (string (code-char 10)))
(defun concat (&rest strs)
(join (cdr list) separator)))))
(defun join-trailing (list separator)
- (cond
- ((null list)
- "")
- ((null (car list))
- (join-trailing (cdr list) separator))
- (t
- (concat (car list) separator (join-trailing (cdr list) separator)))))
+ (if (null list)
+ ""
+ (concat (car list) separator (join-trailing (cdr list) separator))))
(defun integer-to-string (x)
(if (zerop x)
"0"
(let ((digits nil))
- (while (not (= x 0))
+ (while (not (zerop x))
(push (mod x 10) digits)
(setq x (truncate x 10)))
(join (mapcar (lambda (d) (string (char "0123456789" d)))
;;;; Reader
-;;; It is a basic Lisp reader. It does not use advanced stuff
-;;; intentionally, because we want to use it to bootstrap a simple
-;;; Lisp. The main entry point is the function `ls-read', which
-;;; accepts a strings as argument and return the Lisp expression.
+;;; The Lisp reader, parse strings and return Lisp objects. The main
+;;; entry points are `ls-read' and `ls-read-from-string'.
+
(defun make-string-stream (string)
(cons string 0))
(skip-whitespaces-and-comments stream)
(let ((ch (%peek-char stream)))
(cond
+ ((null ch)
+ (error "Unspected EOF"))
((char= ch #\))
(%read-char stream)
nil)
((char= ch #\.)
(%read-char stream)
- (skip-whitespaces-and-comments stream)
(prog1 (ls-read stream)
+ (skip-whitespaces-and-comments stream)
(unless (char= (%read-char stream) #\))
(error "')' was expected."))))
(t
(let ((string "")
(ch nil))
(setq ch (%read-char stream))
- (while (not (char= ch #\"))
- (when (char= ch #\\)
+ (while (not (eql ch #\"))
+ (when (null ch)
+ (error "Unexpected EOF"))
+ (when (eql ch #\\)
(setq ch (%read-char stream)))
(setq string (concat string (string ch)))
(setq ch (%read-char stream)))
;;;; Compiler
+;;; Translate the Lisp code to Javascript. It will compile the special
+;;; forms. Some primitive functions are compiled as special forms
+;;; too. The respective real functions are defined in the target (see
+;;; the beginning of this file) as well as some primitive functions.
+
(defvar *compilation-unit-checks* '())
(defvar *env* '())
(defun lookup-function-translation (symbol env)
(binding-translation (lookup-function symbol env)))
-
(defvar *toplevel-compilations* nil)
(defun %compile-defvar (name)
(defun %compile-defmacro (name lambda)
(push (make-binding name 'macro lambda t) *fenv*))
-
(defvar *compilations* nil)
(defun ls-compile-block (sexps env fenv)
(ls-compile val env fenv)))
;;; Literals
-
(defun escape-string (string)
(let ((output "")
(index 0)
((symbolp x)
(lookup-function-translation x fenv))))
-#+common-lisp
-(defmacro eval-when-compile (&body body)
- `(eval-when (:compile-toplevel :load-toplevel :execute)
- ,@body))
-
(define-compilation eval-when-compile (&rest body)
(eval (cons 'progn body))
- nil)
+ "")
(defmacro define-transformation (name args form)
`(define-compilation ,name ,args
(define-transformation let (bindings &rest body)
(let ((bindings (mapcar #'ensure-list bindings)))
- `((lambda ,(mapcar 'car bindings) ,@body)
- ,@(mapcar 'cadr bindings))))
+ `((lambda ,(mapcar #'car bindings) ,@body)
+ ,@(mapcar #'cadr bindings))))
;;; A little backquote implementation without optimizations of any
;;; kind for lispstrack.
"})()" *newline*))))
(define-compilation js-eval (string)
- (concat "eval(" (ls-compile string env fenv) ")"))
+ (concat "eval.apply(window, [" (ls-compile string env fenv) "])"))
(define-compilation error (string)
(compile-bool
(concat "(" (ls-compile key env fenv) " in " (ls-compile object env fenv) ")")))
+(define-compilation functionp (x)
+ (compile-bool
+ (concat "(typeof " (ls-compile x env fenv) " == 'function')")))
+
(defun macrop (x)
(and (symbolp x) (eq (binding-type (lookup-function x *fenv*)) 'macro)))
(setq *toplevel-compilations* nil)
(let ((code (ls-compile sexp nil nil)))
(prog1
- (concat #+common-lisp (concat "/* " (princ-to-string sexp) " */")
+ (concat #+common-lisp (concat "/* " (princ-to-string sexp) " */")
(join (mapcar (lambda (x) (concat x ";" *newline*))
*toplevel-compilations*)
"")
code)
(setq *toplevel-compilations* nil))))
+
+;;; Once we have the compiler, we define the runtime environment and
+;;; interactive development (eval), which works calling the compiler
+;;; and evaluating the Javascript result globally.
+
+(defun print-to-string (form)
+ (cond
+ ((symbolp form) (symbol-name form))
+ ((integerp form) (integer-to-string form))
+ ((stringp form) (concat "\"" (escape-string form) "\""))
+ ((functionp form) (concat "#<FUNCTION>"))
+ ((listp form)
+ (concat "("
+ (join (mapcar #'print-to-string form)
+ " ")
+ ")"))))
+
+#+lispstrack
+(progn
+ (defmacro with-compilation-unit (&rest body)
+ `(prog1
+ (progn
+ (setq *compilation-unit-checks* nil)
+ (setq *env* (remove-if-not #'binding-declared *env*))
+ (setq *fenv* (remove-if-not #'binding-declared *fenv*))
+ ,@body)
+ (dolist (check *compilation-unit-checks*)
+ (funcall check))))
+
+ (defun eval (x)
+ (let ((code
+ (with-compilation-unit
+ (ls-compile-toplevel x nil nil))))
+ (js-eval code)))
+
+ ;; Set the initial global environment to be equal to the host global
+ ;; environment at this point of the compilation.
+ (eval-when-compile
+ (let ((c1 (ls-compile `(setq *fenv* ',*fenv*) nil nil))
+ (c2 (ls-compile `(setq *env* ',*env*) nil nil))
+ (c3 (ls-compile `(setq *variable-counter* ',*variable-counter*) nil nil))
+ (c4 (ls-compile `(setq *function-counter* ',*function-counter*) nil nil))
+ (c5 (ls-compile `(setq *literal-counter* ',*literal-counter*) nil nil)))
+ (setq *toplevel-compilations*
+ (append *toplevel-compilations* (list c1 c2 c3 c4 c5)))))
+
+ (js-eval
+ (concat "var lisp = {};"
+ "lisp.read = " (lookup-function-translation 'ls-read-from-string nil) ";" *newline*
+ "lisp.print = " (lookup-function-translation 'print-to-string nil) ";" *newline*
+ "lisp.eval = " (lookup-function-translation 'eval nil) ";" *newline*
+ "lisp.compile = " (lookup-function-translation 'ls-compile-toplevel nil) ";" *newline*
+ "lisp.evalString = function(str){" *newline*
+ " return lisp.eval(lisp.read(str));" *newline*
+ "}" *newline*
+ "lisp.compileString = function(str){" *newline*
+ " return lisp.compile(lisp.read(str));" *newline*
+ "}" *newline*)))
+
+
+;;; Finally, we provide a couple of functions to easily bootstrap
+;;; this. It just calls the compiler with this file as input.
+
#+common-lisp
(progn
(defun read-whole-file (filename)
projects / jscl.git / blobdiff