X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=test.lisp;h=adf8c1230c9ce1a3e19e1ad3eaf72f7ef386556a;hb=4f17b56fa136f97d11975d081a861351eb64db76;hp=e5fdc77afdcffc786116f96c82aa1690028a2c71;hpb=5c045e769548bec80d6270a21f47d3d411e69080;p=jscl.git

diff --git a/test.lisp b/test.lisp
index e5fdc77..adf8c12 100644
--- a/test.lisp
+++ b/test.lisp
@@ -2,9 +2,9 @@
 
 (eval-when-compile
   (%compile-defmacro 'defmacro
-     (lambda (name args &rest body)
+     '(lambda (name args &rest body)
        `(eval-when-compile
-          (%compile-defmacro ',name (lambda ,args ,@body))))))
+          (%compile-defmacro ',name '(lambda ,args ,@body))))))
 
 (defmacro defvar (name value)
   `(progn
@@ -12,15 +12,47 @@
        (%compile-defvar ',name))
      (setq ,name ,value)))
 
-(defvar t 't)
-(defvar nil 'nil)
-
 (defmacro defun (name args &rest body)
   `(progn
      (eval-when-compile
        (%compile-defun ',name))
      (fsetq ,name (lambda ,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))
@@ -34,19 +66,46 @@
 (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 cdr (x) (cdr x))
 (defun cdar (x) (cdr (car x)))
 (defun cddr (x) (cdr (cdr x)))
 
-(defun append (list1 list2)
+(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
+      (list x)))
+
+(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
@@ -55,6 +114,24 @@
 (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)
       '()
@@ -64,18 +141,6 @@
 (defmacro push (x place)
   `(setq ,place (cons ,x ,place)))
 
-(defvar *package* (new))
-
-(defun intern (name)
-  (let ((s (get *package* name)))
-    (if s
-        s
-        (set *package* name (make-symbol name)))))
-
-(defun find-symbol (name)
-  (get *package* name))
-
-
 (defmacro cond (&rest clausules)
   (if (null clausules)
       nil
@@ -85,6 +150,25 @@
                (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 !reduce (func list initial)
   (if (null list)
       initial
@@ -123,9 +207,886 @@
   (if (zerop x)
       "0"
       (let ((digits nil))
+        (while (not (zerop x 0))
+          (push (mod x 10) digits)
+          (setq x (truncate x 10)))
+        (join (mapcar (lambda (d) (string (char "0123456789" d)))
+                      digits)
+              ""))))
+
+(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 char= (x y) (= x y))
+
+(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))
+
+;; ----------------------------------------------------------
+
+;;; Utils
+
+#+common-lisp
+(progn
+  (defmacro while (condition &body body)
+    `(do ()
+         ((not ,condition))
+       ,@body))
+
+  (defun concat-two (s1 s2)
+    (concatenate 'string s1 s2))
+
+  (defun setcar (cons new)
+    (setf (car cons) new))
+  (defun setcdr (cons new)
+    (setf (cdr cons) new)))
+
+(defvar *newline* (string (code-char 10)))
+
+(defun concat (&rest strs)
+  (!reduce (lambda (s1 s2) (concat-two s1 s2))
+           strs
+           ""))
+
+;;; Concatenate a list of strings, with a separator
+(defun join (list separator)
+  (cond
+    ((null list)
+     "")
+    ((null (cdr list))
+     (car list))
+    (t
+     (concat (car list)
+             separator
+             (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)))))
+
+(defun integer-to-string (x)
+  (if (zerop x)
+      "0"
+      (let ((digits nil))
         (while (not (= x 0))
           (push (mod x 10) digits)
           (setq x (truncate x 10)))
         (join (mapcar (lambda (d) (string (char "0123456789" d)))
                       digits)
               ""))))
+
+;;;; 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.
+(defun make-string-stream (string)
+  (cons string 0))
+
+(defun %peek-char (stream)
+  (and (< (cdr stream) (length (car stream)))
+       (char (car stream) (cdr stream))))
+
+(defun %read-char (stream)
+  (and (< (cdr stream) (length (car stream)))
+       (prog1 (char (car stream) (cdr stream))
+         (setcdr stream (1+ (cdr stream))))))
+
+(defun whitespacep (ch)
+  (or (char= ch #\space) (char= ch #\newline) (char= ch #\tab)))
+
+(defun skip-whitespaces (stream)
+  (let (ch)
+    (setq ch (%peek-char stream))
+    (while (and ch (whitespacep ch))
+      (%read-char stream)
+      (setq ch (%peek-char stream)))))
+
+(defun terminalp (ch)
+  (or (null ch) (whitespacep ch) (char= #\) ch) (char= #\( ch)))
+
+(defun read-until (stream func)
+  (let ((string "")
+        (ch))
+    (setq ch (%peek-char stream))
+    (while (not (funcall func ch))
+      (setq string (concat string (string ch)))
+      (%read-char stream)
+      (setq ch (%peek-char stream)))
+    string))
+
+(defun skip-whitespaces-and-comments (stream)
+  (let (ch)
+    (skip-whitespaces stream)
+    (setq ch (%peek-char stream))
+    (while (and ch (char= ch #\;))
+      (read-until stream (lambda (x) (char= x #\newline)))
+      (skip-whitespaces stream)
+      (setq ch (%peek-char stream)))))
+
+(defun %read-list (stream)
+  (skip-whitespaces-and-comments stream)
+  (let ((ch (%peek-char stream)))
+    (cond
+      ((null ch)
+       (error "Unspected EOF"))
+      ((char= ch #\))
+       (%read-char stream)
+       nil)
+      ((char= ch #\.)
+       (%read-char stream)
+       (prog1 (ls-read stream)
+         (skip-whitespaces-and-comments stream)
+         (unless (char= (%read-char stream) #\))
+           (error "')' was expected."))))
+      (t
+       (cons (ls-read stream) (%read-list stream))))))
+
+(defun read-string (stream)
+  (let ((string "")
+        (ch nil))
+    (setq ch (%read-char stream))
+    (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)))
+    string))
+
+(defvar *eof* (make-symbol "EOF"))
+(defun ls-read (stream)
+  (skip-whitespaces-and-comments stream)
+  (let ((ch (%peek-char stream)))
+    (cond
+      ((null ch)
+       *eof*)
+      ((char= ch #\()
+       (%read-char stream)
+       (%read-list stream))
+      ((char= ch #\')
+       (%read-char stream)
+       (list 'quote (ls-read stream)))
+      ((char= ch #\`)
+       (%read-char stream)
+       (list 'backquote (ls-read stream)))
+      ((char= ch #\")
+       (%read-char stream)
+       (read-string stream))
+      ((char= ch #\,)
+       (%read-char stream)
+       (if (eql (%peek-char stream) #\@)
+           (progn (%read-char stream) (list 'unquote-splicing (ls-read stream)))
+           (list 'unquote (ls-read stream))))
+      ((char= ch #\#)
+       (%read-char stream)
+       (ecase (%read-char stream)
+         (#\'
+          (list 'function (ls-read stream)))
+         (#\\
+          (let ((cname
+		 (concat (string (%read-char stream))
+			 (read-until stream #'terminalp))))
+            (cond
+              ((string= cname "space") (char-code #\space))
+              ((string= cname "tab") (char-code #\tab))
+              ((string= cname "newline") (char-code #\newline))
+              (t (char-code (char cname 0))))))
+         (#\+
+          (let ((feature (read-until stream #'terminalp)))
+            (cond
+              ((string= feature "common-lisp")
+               (ls-read stream)         ;ignore
+               (ls-read stream))
+              ((string= feature "lispstrack")
+               (ls-read stream))
+              (t
+               (error "Unknown reader form.")))))))
+      (t
+       (let ((string (read-until stream #'terminalp)))
+         (if (every #'digit-char-p string)
+             (parse-integer string)
+             (intern (string-upcase string))))))))
+
+(defun ls-read-from-string (string)
+  (ls-read (make-string-stream string)))
+
+
+;;;; Compiler
+
+(defvar *compilation-unit-checks* '())
+
+(defvar *env* '())
+(defvar *fenv* '())
+
+(defun make-binding (name type js declared)
+  (list name type js declared))
+
+(defun binding-name (b) (first b))
+(defun binding-type (b) (second b))
+(defun binding-translation (b) (third b))
+(defun binding-declared (b)
+  (and b (fourth b)))
+(defun mark-binding-as-declared (b)
+  (setcar (cdddr b) t))
+
+
+(defvar *variable-counter* 0)
+(defun gvarname (symbol)
+  (concat "v" (integer-to-string (incf *variable-counter*))))
+
+(defun lookup-variable (symbol env)
+  (or (assoc symbol env)
+      (assoc symbol *env*)
+      (let ((name (symbol-name symbol))
+            (binding (make-binding symbol 'variable (gvarname symbol) nil)))
+        (push binding *env*)
+        (push (lambda ()
+                (unless (binding-declared (assoc symbol *env*))
+                  (error (concat "Undefined variable `" name "'"))))
+              *compilation-unit-checks*)
+        binding)))
+
+(defun lookup-variable-translation (symbol env)
+  (binding-translation (lookup-variable symbol env)))
+
+(defun extend-local-env (args env)
+  (append (mapcar (lambda (symbol)
+                    (make-binding symbol 'variable (gvarname symbol) t))
+                  args)
+          env))
+
+(defvar *function-counter* 0)
+(defun lookup-function (symbol env)
+  (or (assoc symbol env)
+      (assoc symbol *fenv*)
+      (let ((name (symbol-name symbol))
+            (binding
+             (make-binding symbol
+                           'function
+                           (concat "f" (integer-to-string (incf *function-counter*)))
+                           nil)))
+        (push binding *fenv*)
+        (push (lambda ()
+                (unless (binding-declared (assoc symbol *fenv*))
+                  (error (concat "Undefined function `" name "'"))))
+              *compilation-unit-checks*)
+        binding)))
+
+(defun lookup-function-translation (symbol env)
+  (binding-translation (lookup-function symbol env)))
+
+
+(defvar *toplevel-compilations* nil)
+
+(defun %compile-defvar (name)
+  (let ((b (lookup-variable name *env*)))
+    (mark-binding-as-declared b)
+    (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+
+(defun %compile-defun (name)
+  (let ((b (lookup-function name *env*)))
+    (mark-binding-as-declared b)
+    (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+
+(defun %compile-defmacro (name lambda)
+  (push (make-binding name 'macro lambda t) *fenv*))
+
+
+(defvar *compilations* nil)
+
+(defun ls-compile-block (sexps env fenv)
+  (join-trailing
+   (remove nil (mapcar (lambda (x)
+                         (ls-compile x env fenv))
+                       sexps))
+                 ";
+"))
+(defmacro define-compilation (name args &rest body)
+  ;; Creates a new primitive `name' with parameters args and
+  ;; @body. The body can access to the local environment through the
+  ;; variable ENV.
+  `(push (list ',name (lambda (env fenv ,@args) ,@body))
+         *compilations*))
+
+(define-compilation if (condition true false)
+  (concat "("
+          (ls-compile condition env fenv) " !== " (ls-compile nil nil nil)
+          " ? "
+          (ls-compile true env fenv)
+          " : "
+          (ls-compile false env fenv)
+          ")"))
+
+;;; Return the required args of a lambda list
+(defun lambda-list-required-argument (lambda-list)
+  (if (or (null lambda-list) (eq (car lambda-list) '&rest))
+      nil
+      (cons (car lambda-list) (lambda-list-required-argument (cdr lambda-list)))))
+
+(defun lambda-list-rest-argument (lambda-list)
+  (second (member '&rest lambda-list)))
+
+(define-compilation lambda (lambda-list &rest body)
+  (let ((required-arguments (lambda-list-required-argument lambda-list))
+        (rest-argument (lambda-list-rest-argument lambda-list)))
+    (let ((new-env (extend-local-env
+                    (append (and rest-argument (list rest-argument))
+                            required-arguments)
+                    env)))
+      (concat "(function ("
+              (join (mapcar (lambda (x)
+                              (lookup-variable-translation x new-env))
+                            required-arguments)
+                    ",")
+              "){"
+              *newline*
+              (if rest-argument
+                  (let ((js!rest (lookup-variable-translation rest-argument new-env)))
+                    (concat "var " js!rest "= " (ls-compile nil env fenv) ";" *newline*
+                            "for (var i = arguments.length-1; i>="
+                            (integer-to-string (length required-arguments))
+                            "; i--)" *newline*
+                            js!rest " = "
+                            "{car: arguments[i], cdr: " js!rest "};"
+                            *newline*))
+                  "")
+              (concat (ls-compile-block (butlast body) new-env fenv)
+                      "return " (ls-compile (car (last body)) new-env fenv) ";")
+              *newline*
+              "})"))))
+
+(define-compilation fsetq (var val)
+  (concat (lookup-function-translation var fenv)
+          " = "
+          (ls-compile val env fenv)))
+
+(define-compilation setq (var val)
+  (concat (lookup-variable-translation var env)
+          " = "
+           (ls-compile val env fenv)))
+
+;;; Literals
+
+(defun escape-string (string)
+  (let ((output "")
+        (index 0)
+        (size (length string)))
+    (while (< index size)
+      (let ((ch (char string index)))
+        (when (or (char= ch #\") (char= ch #\\))
+          (setq output (concat output "\\")))
+        (when (or (char= ch #\newline))
+          (setq output (concat output "\\"))
+          (setq ch #\n))
+        (setq output (concat output (string ch))))
+      (incf index))
+    output))
+
+(defun literal->js (sexp)
+  (cond
+    ((integerp sexp) (integer-to-string sexp))
+    ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
+    ((symbolp sexp) (ls-compile `(intern ,(escape-string (symbol-name sexp))) *env* *fenv*))
+    ((consp sexp) (concat "{car: "
+                          (literal->js (car sexp))
+                          ", cdr: "
+			  (literal->js (cdr sexp)) "}"))))
+
+(defvar *literal-counter* 0)
+(defun literal (form)
+  (let ((var (concat "l" (integer-to-string (incf *literal-counter*)))))
+    (push (concat "var " var " = " (literal->js form)) *toplevel-compilations*)
+    var))
+
+(define-compilation quote (sexp)
+  (literal sexp))
+
+(define-compilation debug (form)
+  (concat "console.log(" (ls-compile form env fenv) ")"))
+
+(define-compilation while (pred &rest body)
+  (concat "(function(){ while("
+          (ls-compile pred env fenv) " !== " (ls-compile nil nil nil)
+          "){"
+          (ls-compile-block body env fenv)
+          "}})()"))
+
+(define-compilation function (x)
+  (cond
+    ((and (listp x) (eq (car x) 'lambda))
+     (ls-compile x env fenv))
+    ((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
+     (ls-compile ,form env fenv)))
+
+(define-transformation progn (&rest body)
+  `((lambda () ,@body)))
+
+(define-transformation let (bindings &rest body)
+  (let ((bindings (mapcar #'ensure-list bindings)))
+    `((lambda ,(mapcar #'car bindings) ,@body)
+      ,@(mapcar #'cadr bindings))))
+
+;;; A little backquote implementation without optimizations of any
+;;; kind for lispstrack.
+(defun backquote-expand-1 (form)
+  (cond
+    ((symbolp form)
+     (list 'quote form))
+    ((atom form)
+     form)
+    ((eq (car form) 'unquote)
+     (car form))
+    ((eq (car form) 'backquote)
+     (backquote-expand-1 (backquote-expand-1 (cadr form))))
+    (t
+     (cons 'append
+           (mapcar (lambda (s)
+                     (cond
+                       ((and (listp s) (eq (car s) 'unquote))
+                        (list 'list (cadr s)))
+                       ((and (listp s) (eq (car s) 'unquote-splicing))
+                        (cadr s))
+                       (t
+                        (list 'list (backquote-expand-1 s)))))
+                   form)))))
+
+(defun backquote-expand (form)
+  (if (and (listp form) (eq (car form) 'backquote))
+      (backquote-expand-1 (cadr form))
+      form))
+
+(defmacro backquote (form)
+  (backquote-expand-1 form))
+
+(define-transformation backquote (form)
+  (backquote-expand-1 form))
+
+;;; Primitives
+
+(defun compile-bool (x)
+  (concat "(" x "?" (ls-compile t nil nil) ": " (ls-compile nil nil nil) ")"))
+
+(define-compilation + (x y)
+  (concat "((" (ls-compile x env fenv) ") + (" (ls-compile y env fenv) "))"))
+
+(define-compilation - (x y)
+  (concat "((" (ls-compile x env fenv) ") - (" (ls-compile y env fenv) "))"))
+
+(define-compilation * (x y)
+  (concat "((" (ls-compile x env fenv) ") * (" (ls-compile y env fenv) "))"))
+
+(define-compilation / (x y)
+  (concat "((" (ls-compile x env fenv) ") / (" (ls-compile y env fenv) "))"))
+
+(define-compilation < (x y)
+  (compile-bool (concat "((" (ls-compile x env fenv) ") < (" (ls-compile y env fenv) "))")))
+
+(define-compilation = (x y)
+  (compile-bool (concat "((" (ls-compile x env fenv) ") == (" (ls-compile y env fenv) "))")))
+
+(define-compilation numberp (x)
+  (compile-bool (concat "(typeof (" (ls-compile x env fenv) ") == \"number\")")))
+
+
+(define-compilation mod (x y)
+  (concat "((" (ls-compile x env fenv) ") % (" (ls-compile y env fenv) "))"))
+
+(define-compilation floor (x)
+  (concat "(Math.floor(" (ls-compile x env fenv) "))"))
+
+(define-compilation null (x)
+  (compile-bool (concat "(" (ls-compile x env fenv) "===" (ls-compile nil env fenv) ")")))
+
+(define-compilation cons (x y)
+  (concat "({car: " (ls-compile x env fenv) ", cdr: " (ls-compile y env fenv) "})"))
+
+(define-compilation consp (x)
+  (compile-bool
+   (concat "(function(){ var tmp = "
+           (ls-compile x env fenv)
+           "; return (typeof tmp == 'object' && 'car' in tmp);})()")))
+
+(define-compilation car (x)
+  (concat "(function () { var tmp = " (ls-compile x env fenv)
+          "; return tmp === " (ls-compile nil nil nil) "? "
+          (ls-compile nil nil nil)
+          ": tmp.car; })()"))
+
+(define-compilation cdr (x)
+  (concat "(function () { var tmp = " (ls-compile x env fenv)
+          "; return tmp === " (ls-compile nil nil nil) "? "
+          (ls-compile nil nil nil)
+          ": tmp.cdr; })()"))
+
+(define-compilation setcar (x new)
+  (concat "((" (ls-compile x env fenv) ").car = " (ls-compile new env fenv) ")"))
+
+(define-compilation setcdr (x new)
+  (concat "((" (ls-compile x env fenv) ").cdr = " (ls-compile new env fenv) ")"))
+
+(define-compilation symbolp (x)
+  (compile-bool
+   (concat "(function(){ var tmp = "
+           (ls-compile x env fenv)
+           "; return (typeof tmp == 'object' && 'name' in tmp); })()")))
+
+(define-compilation make-symbol (name)
+  (concat "{name: " (ls-compile name env fenv) "}"))
+
+(define-compilation symbol-name (x)
+  (concat "(" (ls-compile x env fenv) ").name"))
+
+(define-compilation eq (x y)
+  (compile-bool
+   (concat "(" (ls-compile x env fenv) " === " (ls-compile y env fenv) ")")))
+
+(define-compilation equal (x y)
+  (compile-bool
+   (concat "(" (ls-compile x env fenv) " == " (ls-compile y env fenv) ")")))
+
+(define-compilation string (x)
+  (concat "String.fromCharCode(" (ls-compile x env fenv) ")"))
+
+(define-compilation stringp (x)
+  (compile-bool
+   (concat "(typeof(" (ls-compile x env fenv) ") == \"string\")")))
+
+(define-compilation string-upcase (x)
+  (concat "(" (ls-compile x env fenv) ").toUpperCase()"))
+
+(define-compilation string-length (x)
+  (concat "(" (ls-compile x env fenv) ").length"))
+
+(define-compilation char (string index)
+  (concat "("
+          (ls-compile string env fenv)
+          ").charCodeAt("
+          (ls-compile index env fenv)
+          ")"))
+
+(define-compilation concat-two (string1 string2)
+  (concat "("
+          (ls-compile string1 env fenv)
+          ").concat("
+          (ls-compile string2 env fenv)
+          ")"))
+
+(define-compilation funcall (func &rest args)
+  (concat "("
+          (ls-compile func env fenv)
+          ")("
+          (join (mapcar (lambda (x)
+                          (ls-compile x env fenv))
+                        args)
+                ", ")
+          ")"))
+
+(define-compilation apply (func &rest args)
+  (if (null args)
+      (concat "(" (ls-compile func env fenv) ")()")
+      (let ((args (butlast args))
+            (last (car (last args))))
+        (concat "(function(){" *newline*
+                "var f = " (ls-compile func env fenv) ";" *newline*
+                "var args = [" (join (mapcar (lambda (x)
+                                               (ls-compile x env fenv))
+                                             args)
+                                     ", ")
+                "];" *newline*
+                "var tail = (" (ls-compile last env fenv) ");" *newline*
+                "while (tail != " (ls-compile nil env fenv) "){" *newline*
+                "    args.push(tail.car);" *newline*
+                "    tail = tail.cdr;" *newline*
+                "}" *newline*
+                "return f.apply(this, args);" *newline*
+                "})()" *newline*))))
+
+(define-compilation js-eval (string)
+  (concat "eval.apply(window, [" (ls-compile string env fenv)  "])"))
+
+
+(define-compilation error (string)
+  (concat "(function (){ throw " (ls-compile string env fenv) ";" "return 0;})()"))
+
+(define-compilation new ()
+  "{}")
+
+(define-compilation get (object key)
+  (concat "(function(){ var tmp = "
+          "(" (ls-compile object env fenv) ")[" (ls-compile key env fenv) "]"
+          ";"
+          "return tmp == undefined? " (ls-compile nil nil nil) ": tmp ;"
+          "})()"))
+
+(define-compilation set (object key value)
+  (concat "(("
+          (ls-compile object env fenv)
+          ")["
+          (ls-compile key env fenv) "]"
+          " = " (ls-compile value env fenv) ")"))
+
+(define-compilation in (key object)
+  (compile-bool
+   (concat "(" (ls-compile key env fenv) " in " (ls-compile object env fenv) ")")))
+
+
+(defun macrop (x)
+  (and (symbolp x) (eq (binding-type (lookup-function x *fenv*)) 'macro)))
+
+(defun ls-macroexpand-1 (form env fenv)
+  (if (macrop (car form))
+      (let ((binding (lookup-function (car form) *env*)))
+        (if (eq (binding-type binding) 'macro)
+            (apply (eval (binding-translation binding)) (cdr form))
+            form))
+      form))
+
+(defun compile-funcall (function args env fenv)
+  (cond
+    ((symbolp function)
+     (concat (lookup-function-translation function fenv)
+             "("
+             (join (mapcar (lambda (x) (ls-compile x env fenv)) args)
+                   ", ")
+             ")"))
+    ((and (listp function) (eq (car function) 'lambda))
+     (concat "(" (ls-compile function env fenv) ")("
+             (join (mapcar (lambda (x) (ls-compile x env fenv)) args)
+                   ", ")
+             ")"))
+    (t
+     (error (concat "Invalid function designator " (symbol-name function))))))
+
+(defun ls-compile (sexp env fenv)
+  (cond
+    ((symbolp sexp) (lookup-variable-translation sexp env))
+    ((integerp sexp) (integer-to-string sexp))
+    ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
+    ((listp sexp)
+     (if (assoc (car sexp) *compilations*)
+         (let ((comp (second (assoc (car sexp) *compilations*))))
+           (apply comp env fenv (cdr sexp)))
+         (if (macrop (car sexp))
+             (ls-compile (ls-macroexpand-1 sexp env fenv) env fenv)
+             (compile-funcall (car sexp) (cdr sexp) env fenv))))))
+
+(defun ls-compile-toplevel (sexp)
+  (setq *toplevel-compilations* nil)
+  (let ((code (ls-compile sexp nil nil)))
+    (prog1
+        (concat  #+common-lisp (concat "/* " (princ-to-string sexp) " */")
+                (join (mapcar (lambda (x) (concat x ";" *newline*))
+                              *toplevel-compilations*)
+               "")
+                code)
+      (setq *toplevel-compilations* nil))))
+
+#+common-lisp
+(progn
+  (defun read-whole-file (filename)
+    (with-open-file (in filename)
+      (let ((seq (make-array (file-length in) :element-type 'character)))
+        (read-sequence seq in)
+        seq)))
+
+  (defun ls-compile-file (filename output)
+    (setq *env* nil *fenv* nil)
+    (setq *compilation-unit-checks* nil)
+    (with-open-file (out output :direction :output :if-exists :supersede)
+      (let* ((source (read-whole-file filename))
+             (in (make-string-stream source)))
+        (loop
+           for x = (ls-read in)
+           until (eq x *eof*)
+           for compilation = (ls-compile-toplevel x)
+           when (plusp (length compilation))
+           do (write-line (concat compilation "; ") out))
+        (dolist (check *compilation-unit-checks*)
+          (funcall check))
+        (setq *compilation-unit-checks* nil))))
+
+  (defun bootstrap ()
+    (ls-compile-file "lispstrack.lisp" "lispstrack.js")))
+
+;;; ----------------------------------------------------------
+
+(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.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*))