X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=ecmalisp.lisp;h=2064ee16ef93891245f1ea56263dbeda5e239ff2;hb=3c5f2f88672d5d6ec865f4b52331e2d154ef80ba;hp=c3f886845fe1e21e6305f5165900d5de26c1336a;hpb=89dc08b0aefcb9256728f855e3699b19de221564;p=jscl.git

diff --git a/ecmalisp.lisp b/ecmalisp.lisp
index c3f8868..2064ee1 100644
--- a/ecmalisp.lisp
+++ b/ecmalisp.lisp
@@ -1,6 +1,6 @@
 ;;; ecmalisp.lisp ---
 
-;; Copyright (C) 2012 David Vazquez
+;; Copyright (C) 2012, 2013 David Vazquez
 ;; Copyright (C) 2012 Raimon Grau
 
 ;; This program is free software: you can redistribute it and/or
@@ -21,108 +21,120 @@
 ;;; 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.
+
 #+ecmalisp
 (progn
- (eval-when-compile
-   (%compile-defmacro 'defmacro
-                      '(lambda (name args &rest body)
-                        `(eval-when-compile
-                           (%compile-defmacro ',name
-                                              '(lambda ,(mapcar (lambda (x)
-                                                                  (if (eq x '&body)
-                                                                      '&rest
-                                                                      x))
-                                                                args)
-                                                ,@body))))))
-
- (defmacro %defvar (name value)
-   `(progn
-      (eval-when-compile
-        (%compile-defvar ',name))
-      (setq ,name ,value)))
-
-  (defmacro defvar (name &optional value)
-    `(%defvar ,name ,value))
+  (eval-when-compile
+    (%compile-defmacro 'defmacro
+                       '(lambda (name args &rest body)
+                         `(eval-when-compile
+                            (%compile-defmacro ',name
+                                               '(lambda ,(mapcar (lambda (x)
+                                                                   (if (eq x '&body)
+                                                                       '&rest
+                                                                       x))
+                                                                 args)
+                                                 ,@body))))))
+
+  (defmacro declaim (&rest decls)
+    `(eval-when-compile
+       ,@(mapcar (lambda (decl) `(!proclaim ',decl)) decls)))
+
+  (declaim (constant nil t))
+  (setq nil 'nil)
+  (setq t 't)
+
+  (defmacro when (condition &body body)
+    `(if ,condition (progn ,@body) nil))
+
+  (defmacro unless (condition &body body)
+    `(if ,condition nil (progn ,@body)))
+
+  (defmacro defvar (name value &optional docstring)
+    `(progn
+       (unless (boundp ',name) (setq ,name ,value))
+       ,@(when (stringp docstring) `((oset ',name "vardoc" ,docstring)))
+       ',name))
+
+  (defmacro defparameter (name value &optional docstring)
+    `(progn
+       (setq ,name ,value)
+       ,@(when (stringp docstring) `((oset ',name "vardoc" ,docstring)))
+       ',name))
 
   (defmacro named-lambda (name args &rest body)
     (let ((x (gensym "FN")))
       `(let ((,x (lambda ,args ,@body)))
-         (set ,x "fname" ,name)
+         (oset ,x "fname" ,name)
          ,x)))
 
-  (defmacro %defun (name args &rest body)
+  (defmacro defun (name args &rest body)
     `(progn
-       (eval-when-compile
-         (%compile-defun ',name))
-       (fsetq ,name (named-lambda ,(symbol-name name) ,args
-                      ,@body))))
+       (declaim (non-overridable ,name))
+       (fset ',name
+             (named-lambda ,(symbol-name name) ,args
+               ,@(if (and (stringp (car body)) (not (null (cdr body))))
+                     `(,(car body) (block ,name ,@(cdr body)))
+                     `((block ,name ,@body)))))
+       ',name))
 
-  (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 null (x)
-   (eq x nil))
-
- (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))
-
- (defvar *gensym-counter* 0)
- (defun gensym (&optional (prefix "G"))
-   (setq *gensym-counter* (+ *gensym-counter* 1))
-   (make-symbol (concat-two prefix (integer-to-string *gensym-counter*))))
-
- ;; Basic functions
- (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 truncate (x y) (floor (/ x y)))
-
- (defun eql (x y) (eq x y))
-
- (defun not (x) (if x nil t))
-
- (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)))
-
- ;; Basic macros
+  (defun null (x)
+    (eq x nil))
+
+  (defmacro return (&optional value)
+    `(return-from nil ,value))
+
+  (defmacro while (condition &body body)
+    `(block nil (%while ,condition ,@body)))
+
+  (defvar *gensym-counter* 0)
+  (defun gensym (&optional (prefix "G"))
+    (setq *gensym-counter* (+ *gensym-counter* 1))
+    (make-symbol (concat-two prefix (integer-to-string *gensym-counter*))))
+
+  (defun boundp (x)
+    (boundp x))
+
+  ;; Basic functions
+  (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 truncate (x y) (floor (/ x y)))
+
+  (defun eql (x y) (eq x y))
+
+  (defun not (x) (if x nil t))
+
+  (defun cons (x y ) (cons x y))
+  (defun consp (x) (consp x))
+
+  (defun car (x)
+    "Return the CAR part of a cons, or NIL if X is null."
+    (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)))
+
+  ;; Basic macros
 
   (defmacro incf (x &optional (delta 1))
     `(setq ,x (+ ,x ,delta)))
@@ -130,56 +142,53 @@
   (defmacro decf (x &optional (delta 1))
     `(setq ,x (- ,x ,delta)))
 
- (defmacro push (x place)
-   `(setq ,place (cons ,x ,place)))
-
- (defmacro when (condition &body body)
-   `(if ,condition (progn ,@body) nil))
-
- (defmacro unless (condition &body body)
-   `(if ,condition nil (progn ,@body)))
-
- (defmacro dolist (iter &body body)
-   (let ((var (first iter))
-         (g!list (gensym)))
-     `(let ((,g!list ,(second iter))
-            (,var nil))
-        (while ,g!list
-          (setq ,var (car ,g!list))
-          ,@body
-          (setq ,g!list (cdr ,g!list))))))
-
- (defmacro dotimes (iter &body body)
-   (let ((g!to (gensym))
-         (var (first iter))
-         (to (second iter))
-         (result (third iter)))
-     `(let ((,var 0)
-            (,g!to ,to))
-        (while (< ,var ,g!to)
-          ,@body
-          (incf ,var))
-        ,result)))
-
- (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 (gensym)))
-     `(let ((,!form ,form))
-        (cond
-          ,@(mapcar (lambda (clausule)
-                      (if (eq (car clausule) t)
-                          clausule
-                          `((eql ,!form ,(car clausule))
-                            ,@(cdr clausule))))
-                    clausules)))))
+  (defmacro push (x place)
+    `(setq ,place (cons ,x ,place)))
+
+  (defmacro dolist (iter &body body)
+    (let ((var (first iter))
+          (g!list (gensym)))
+      `(block nil
+         (let ((,g!list ,(second iter))
+               (,var nil))
+           (%while ,g!list
+                   (setq ,var (car ,g!list))
+                   (tagbody ,@body)
+                   (setq ,g!list (cdr ,g!list)))
+           ,(third iter)))))
+
+  (defmacro dotimes (iter &body body)
+    (let ((g!to (gensym))
+          (var (first iter))
+          (to (second iter))
+          (result (third iter)))
+      `(block nil
+         (let ((,var 0)
+               (,g!to ,to))
+           (%while (< ,var ,g!to)
+                   (tagbody ,@body)
+                   (incf ,var))
+           ,result))))
+
+  (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 (gensym)))
+      `(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
@@ -210,11 +219,15 @@
          `(let ((,g ,(car forms)))
             (if ,g ,g (or ,@(cdr forms))))))))
 
-   (defmacro prog1 (form &body body)
-   (let ((value (gensym)))
-     `(let ((,value ,form))
-        ,@body
-        ,value))))
+  (defmacro prog1 (form &body body)
+    (let ((value (gensym)))
+      `(let ((,value ,form))
+         ,@body
+         ,value)))
+
+  (defmacro prog2 (form1 result &body body)
+    `(prog1 (progn ,form1 ,result) ,@body)))
+
 
 ;;; This couple of helper functions will be defined in both Common
 ;;; Lisp and in Ecmalisp.
@@ -235,16 +248,6 @@
 ;;; constructions.
 #+ecmalisp
 (progn
-  (defmacro defun (name args &body body)
-    `(progn
-       (%defun ,name ,args ,@body)
-       ',name))
-
-  (defmacro defvar (name &optional value)
-    `(progn
-       (%defvar ,name ,value)
-       ',name))
-
   (defun append-two (list1 list2)
     (if (null list1)
         list2
@@ -254,13 +257,14 @@
   (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 revappend (list1 list2)
+    (while list1
+      (push (car list1) list2)
+      (setq list1 (cdr list1)))
+    list2)
 
   (defun reverse (list)
-    (reverse-aux list '()))
+    (revappend list '()))
 
   (defun list-length (list)
     (let ((l 0))
@@ -283,6 +287,11 @@
         (cons (funcall func (car list))
               (mapcar func (cdr list)))))
 
+  (defun identity (x) x)
+
+  (defun copy-list (x)
+    (mapcar #'identity x))
+
   (defun code-char (x) x)
   (defun char-code (x) x)
   (defun char= (x y) (= x y))
@@ -296,29 +305,29 @@
   (defun listp (x)
     (or (consp x) (null x)))
 
+  (defun nthcdr (n list)
+    (while (and (plusp n) list)
+      (setq n (1- n))
+      (setq list (cdr list)))
+    list)
+
   (defun nth (n list)
-    (cond
-      ((null list) list)
-      ((zerop n) (car list))
-      (t (nth (1- n) (cdr list)))))
+    (car (nthcdr n list)))
 
   (defun last (x)
-    (if (consp (cdr x))
-        (last (cdr x))
-        x))
+    (while (consp (cdr x))
+      (setq x (cdr x)))
+    x)
 
   (defun butlast (x)
     (and (consp (cdr x))
          (cons (car x) (butlast (cdr x)))))
 
   (defun member (x list)
-    (cond
-      ((null list)
-       nil)
-      ((eql x (car list))
-       list)
-      (t
-       (member x (cdr list)))))
+    (while list
+      (when (eql x (car list))
+        (return list))
+      (setq list (cdr list))))
 
   (defun remove (x list)
     (cond
@@ -354,12 +363,12 @@
 
   (defun subseq (seq a &optional b)
     (cond
-     ((stringp seq)
-      (if b
-          (slice seq a b)
-          (slice seq a)))
-     (t
-      (error "Unsupported argument."))))
+      ((stringp seq)
+       (if b
+           (slice seq a b)
+           (slice seq a)))
+      (t
+       (error "Unsupported argument."))))
 
   (defun parse-integer (string)
     (let ((value 0)
@@ -370,28 +379,176 @@
         (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 some (function seq)
+    (cond
+      ((stringp seq)
+       (let ((index 0)
+             (size (length seq)))
+         (while (< index size)
+           (when (funcall function (char seq index))
+             (return-from some t))
+           (incf index))
+         nil))
+      ((listp seq)
+       (dolist (x seq nil)
+         (when (funcall function x)
+           (return t))))
+      (t
+       (error "Unknown sequence."))))
 
-  (defun assoc (x alist)
+  (defun every (function seq)
     (cond
-      ((null alist)
-       nil)
-      ((eql x (caar alist))
-       (car alist))
+      ((stringp seq)
+       (let ((index 0)
+             (size (length seq)))
+         (while (< index size)
+           (unless (funcall function (char seq index))
+             (return-from every nil))
+           (incf index))
+         t))
+      ((listp seq)
+       (dolist (x seq t)
+         (unless (funcall function x)
+           (return))))
       (t
-       (assoc x (cdr alist)))))
+       (error "Unknown sequence."))))
+
+  (defun assoc (x alist)
+    (while alist
+      (if (eql x (caar alist))
+          (return)
+          (setq alist (cdr alist))))
+    (car alist))
+
+  (defun string (x)
+    (cond ((stringp x) x)
+          ((symbolp x) (symbol-name x))
+          (t (char-to-string x))))
 
   (defun string= (s1 s2)
-    (equal s1 s2)))
+    (equal s1 s2))
+
+  (defun fdefinition (x)
+    (cond
+      ((functionp x)
+       x)
+      ((symbolp x)
+       (symbol-function x))
+      (t
+       (error "Invalid function"))))
+
+  (defun disassemble (function)
+    (write-line (lambda-code (fdefinition function)))
+    nil)
+
+  (defun documentation (x type)
+    "Return the documentation of X. TYPE must be the symbol VARIABLE or FUNCTION."
+    (ecase type
+      (function
+       (let ((func (fdefinition x)))
+         (oget func "docstring")))
+      (variable
+       (unless (symbolp x)
+         (error "Wrong argument type! it should be a symbol"))
+       (oget x "vardoc"))))
+
+  ;; Packages
+
+  (defvar *package-list* nil)
+
+  (defun make-package (name &optional use)
+    (let ((package (new))
+          (use (mapcar #'find-package-or-fail use)))
+      (oset package "packageName" name)
+      (oset package "symbols" (new))
+      (oset package "exports" (new))
+      (oset package "use" use)
+      (push package *package-list*)
+      package))
+
+  (defun packagep (x)
+    (and (objectp x) (in "symbols" x)))
+
+  (defun find-package (package-designator)
+    (when (packagep package-designator)
+      (return-from find-package package-designator))
+    (let ((name (string package-designator)))
+      (dolist (package *package-list*)
+        (when (string= (package-name package) name)
+          (return package)))))
+
+  (defun find-package-or-fail (package-designator)
+    (or (find-package package-designator)
+        (error "Package unknown.")))
+
+  (defun package-name (package-designator)
+    (let ((package (find-package-or-fail package-designator)))
+      (oget package "packageName")))
+
+  (defun %package-symbols (package-designator)
+    (let ((package (find-package-or-fail package-designator)))
+      (oget package "symbols")))
+
+  (defun package-use-list (package-designator)
+    (let ((package (find-package-or-fail package-designator)))
+      (oget package "use")))
+
+  (defun %package-external-symbols (package-designator)
+    (let ((package (find-package-or-fail package-designator)))
+      (oget package "exports")))
+
+  (defvar *common-lisp-package*
+    (make-package "CL"))
+
+  (defvar *user-package*
+    (make-package "CL-USER" (list *common-lisp-package*)))
+
+  (defvar *package* *common-lisp-package*)
+
+  (defmacro in-package (package-designator)
+    `(eval-when-compile
+       (setq *package* (find-package-or-fail ,package-designator))))
+
+  ;; This function is used internally to initialize the CL package
+  ;; with the symbols built during bootstrap.
+  (defun %intern-symbol (symbol)
+    (let ((symbols (%package-symbols *common-lisp-package*)))
+      (oset symbol "package" *common-lisp-package*)
+      (oset symbols (symbol-name symbol) symbol)))
+
+  (defun %find-symbol (name package)
+    (let ((package (find-package-or-fail package)))
+      (let ((symbols (%package-symbols package)))
+        (if (in name symbols)
+            (cons (oget symbols name) t)
+            (dolist (used (package-use-list package) (cons nil nil))
+              (let ((exports (%package-external-symbols used)))
+                (when (in name exports)
+                  (return-from %find-symbol
+                    (cons (oget exports name) t)))))))))
+
+  (defun find-symbol (name &optional (package *package*))
+    (car (%find-symbol name package)))
+
+  (defun intern (name &optional (package *package*))
+    (let ((result (%find-symbol name package)))
+      (if (cdr result)
+          (car result)
+          (let ((symbols (%package-symbols package)))
+            (oget symbols name)
+            (let ((symbol (make-symbol name)))
+              (oset symbol "package" package)
+              (oset symbols name symbol))))))
+
+  (defun symbol-package (symbol)
+    (unless (symbolp symbol)
+      (error "it is not a symbol"))
+    (oget symbol "package"))
+
+  (defun export (symbols &optional (package *package*))
+    (let ((exports (%package-external-symbols package)))
+      (dolist (symb symbols t)
+        (oset exports (symbol-name symb) symb)))))
 
 
 ;;; The compiler offers some primitives and special forms which are
@@ -426,6 +583,9 @@
 (defun concat (&rest strs)
   (!reduce #'concat-two strs ""))
 
+(defmacro concatf (variable &body form)
+  `(setq ,variable (concat ,variable (progn ,@form))))
+
 ;;; Concatenate a list of strings, with a separator
 (defun join (list &optional (separator ""))
   (cond
@@ -443,25 +603,42 @@
       ""
       (concat (car list) separator (join-trailing (cdr list) separator))))
 
-;;; Like CONCAT, but prefix each line with four spaces.
+(defun mapconcat (func list)
+  (join (mapcar func list)))
+
+;;; Like CONCAT, but prefix each line with four spaces. Two versions
+;;; of this function are available, because the Ecmalisp version is
+;;; very slow and bootstraping was annoying.
+
+#+ecmalisp
 (defun indent (&rest string)
-  (let ((input (!reduce #'concat string "")))
+  (let ((input (join string)))
     (let ((output "")
           (index 0)
           (size (length input)))
-      (when (plusp size)
-        (setq output "    "))
+      (when (plusp (length input)) (concatf output "    "))
       (while (< index size)
-        (setq output
-              (concat output
-                      (if (and (char= (char input index) #\newline)
-                               (< index (1- size))
-                               (not (char= (char input (1+ index)) #\newline)))
-                          (concat (string #\newline) "    ")
-                          (subseq input index (1+ index)))))
+        (let ((str
+               (if (and (char= (char input index) #\newline)
+                        (< index (1- size))
+                        (not (char= (char input (1+ index)) #\newline)))
+                   (concat (string #\newline) "    ")
+                   (string (char input index)))))
+          (concatf output str))
         (incf index))
       output)))
 
+#+common-lisp
+(defun indent (&rest string)
+  (with-output-to-string (*standard-output*)
+    (with-input-from-string (input (join string))
+      (loop
+         for line = (read-line input nil)
+         while line
+         do (write-string "    ")
+         do (write-line line)))))
+
+
 (defun integer-to-string (x)
   (cond
     ((zerop x)
@@ -476,36 +653,58 @@
        (join (mapcar (lambda (d) (string (char "0123456789" d)))
                      digits))))))
 
+
+;;; Wrap X with a Javascript code to convert the result from
+;;; Javascript generalized booleans to T or NIL.
+(defun js!bool (x)
+  (concat "(" x "?" (ls-compile t) ": " (ls-compile nil) ")"))
+
+;;; Concatenate the arguments and wrap them with a self-calling
+;;; Javascript anonymous function. It is used to make some Javascript
+;;; statements valid expressions and provide a private scope as well.
+;;; It could be defined as function, but we could do some
+;;; preprocessing in the future.
+(defmacro js!selfcall (&body body)
+  `(concat "(function(){" *newline* (indent ,@body) "})()"))
+
+
 ;;; Printer
 
 #+ecmalisp
 (progn
-  (defun print-to-string (form)
+  (defun prin1-to-string (form)
     (cond
       ((symbolp form) (symbol-name form))
       ((integerp form) (integer-to-string form))
       ((stringp form) (concat "\"" (escape-string form) "\""))
       ((functionp form)
-       (let ((name (get form "fname")))
+       (let ((name (oget form "fname")))
          (if name
              (concat "#<FUNCTION " name ">")
              (concat "#<FUNCTION>"))))
       ((listp form)
        (concat "("
-               (join-trailing (mapcar #'print-to-string (butlast form)) " ")
+               (join-trailing (mapcar #'prin1-to-string (butlast form)) " ")
                (let ((last (last form)))
                  (if (null (cdr last))
-                     (print-to-string (car last))
-                     (concat (print-to-string (car last)) " . " (print-to-string (cdr last)))))
-               ")"))))
+                     (prin1-to-string (car last))
+                     (concat (prin1-to-string (car last)) " . " (prin1-to-string (cdr last)))))
+               ")"))
+      ((packagep form)
+       (concat "#<PACKAGE " (package-name form) ">"))))
 
   (defun write-line (x)
     (write-string x)
     (write-string *newline*)
     x)
 
+  (defun warn (string)
+    (write-string "WARNING: ")
+    (write-line string))
+
   (defun print (x)
-    (write-line (print-to-string x))))
+    (write-line (prin1-to-string x))
+    x))
 
 
 ;;;; Reader
@@ -613,12 +812,48 @@
          (t
           (error "Unknown reader form.")))))))
 
-(defvar *eof* (make-symbol "EOF"))
+;;; Parse a string of the form NAME, PACKAGE:NAME or
+;;; PACKAGE::NAME and return the name. If the string is of the
+;;; form 1) or 3), but the symbol does not exist, it will be created
+;;; and interned in that package.
+(defun read-symbol (string)
+  (let ((size (length string))
+        package name internalp index)
+    (setq index 0)
+    (while (and (< index size)
+                (not (char= (char string index) #\:)))
+      (incf index))
+    (cond
+      ;; No package prefix
+      ((= index size)
+       (setq name string)
+       (setq package *package*)
+       (setq internalp t))
+      (t
+       ;; Package prefix
+       (if (zerop index)
+           (setq package "KEYWORD")
+           (setq package (string-upcase (subseq string 0 index))))
+       (incf index)
+       (when (char= (char string index) #\:)
+         (setq internalp t)
+         (incf index))
+       (setq name (subseq string index))))
+    ;; Canonalize symbol name and package
+    (setq name (string-upcase name))
+    (setq package (find-package package))
+    ;; TODO: PACKAGE:SYMBOL should signal error if SYMBOL is not an
+    ;; external symbol from PACKAGE.
+    (if internalp
+        (intern name package)
+        (find-symbol name package))))
+
+(defvar *eof* (gensym))
 (defun ls-read (stream)
   (skip-whitespaces-and-comments stream)
   (let ((ch (%peek-char stream)))
     (cond
-      ((null ch)
+      ((or (null ch) (char= ch #\)))
        *eof*)
       ((char= ch #\()
        (%read-char stream)
@@ -643,7 +878,7 @@
        (let ((string (read-until stream #'terminalp)))
          (if (every #'digit-char-p string)
              (parse-integer string)
-             (intern (string-upcase string))))))))
+             (read-symbol string)))))))
 
 (defun ls-read-from-string (string)
   (ls-read (make-string-stream string)))
@@ -658,108 +893,125 @@
 
 (defvar *compilation-unit-checks* '())
 
-(defvar *env* '())
-(defvar *fenv* '())
-
-(defun make-binding (name type js declared)
-  (list name type js declared))
+(defun make-binding (name type value &optional declarations)
+  (list name type value declarations))
 
 (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))
+(defun binding-value (b) (third b))
+(defun binding-declarations (b) (fourth b))
+
+(defun set-binding-value (b value)
+  (setcar (cddr b) value))
+
+(defun set-binding-declarations (b value)
+  (setcar (cdddr b) value))
+
+(defun push-binding-declaration (decl b)
+  (set-binding-declarations b (cons decl (binding-declarations b))))
+
+
+(defun make-lexenv ()
+  (list nil nil nil nil))
+
+(defun copy-lexenv (lexenv)
+  (copy-list lexenv))
+
+(defun push-to-lexenv (binding lexenv namespace)
+  (ecase namespace
+    (variable   (setcar        lexenv  (cons binding (car lexenv))))
+    (function   (setcar   (cdr lexenv) (cons binding (cadr lexenv))))
+    (block      (setcar  (cddr lexenv) (cons binding (caddr lexenv))))
+    (gotag      (setcar (cdddr lexenv) (cons binding (cadddr lexenv))))))
+
+(defun extend-lexenv (bindings lexenv namespace)
+  (let ((env (copy-lexenv lexenv)))
+    (dolist (binding (reverse bindings) env)
+      (push-to-lexenv binding env namespace))))
+
+(defun lookup-in-lexenv (name lexenv namespace)
+  (assoc name (ecase namespace
+                (variable (first lexenv))
+                (function (second lexenv))
+                (block (third lexenv))
+                (gotag (fourth lexenv)))))
+
+(defvar *environment* (make-lexenv))
 
 (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)))
+(defun translate-variable (symbol)
+  (binding-value (lookup-in-lexenv symbol *environment* 'variable)))
 
+(defun extend-local-env (args)
+  (let ((new (copy-lexenv *environment*)))
+    (dolist (symbol args new)
+      (let ((b (make-binding symbol 'lexical-variable (gvarname symbol))))
+        (push-to-lexenv b new 'variable)))))
+
+;;; Toplevel compilations
 (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 toplevel-compilation (string)
+  (push string *toplevel-compilations*))
+
+(defun null-or-empty-p (x)
+  (zerop (length x)))
 
-(defun %compile-defun (name)
-  (let ((b (lookup-function name *fenv*)))
-    (mark-binding-as-declared b)
-    (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+(defun get-toplevel-compilations ()
+  (reverse (remove-if #'null-or-empty-p *toplevel-compilations*)))
 
 (defun %compile-defmacro (name lambda)
-  (push (make-binding name 'macro lambda t) *fenv*))
+  (toplevel-compilation (ls-compile `',name))
+  (push-to-lexenv (make-binding name 'macro lambda) *environment* 'function))
+
+(defun global-binding (name type namespace)
+  (or (lookup-in-lexenv name *environment* namespace)
+      (let ((b (make-binding name type nil)))
+        (push-to-lexenv b *environment* namespace)
+        b)))
+
+(defun claimp (symbol namespace claim)
+  (let ((b (lookup-in-lexenv symbol *environment* namespace)))
+    (and b (member claim (binding-declarations b)))))
+
+(defun !proclaim (decl)
+  (case (car decl)
+    (notinline
+     (dolist (name (cdr decl))
+       (let ((b (global-binding name 'function 'function)))
+         (push-binding-declaration 'notinline b))))
+    (constant
+     (dolist (name (cdr decl))
+       (let ((b (global-binding name 'variable 'variable)))
+         (push-binding-declaration 'constant b))))
+    (non-overridable
+     (dolist (name (cdr decl))
+       (let ((b (global-binding name 'function 'function)))
+         (push-binding-declaration 'non-overridable b))))))
 
-(defvar *compilations* nil)
+#+ecmalisp
+(fset 'proclaim #'!proclaim)
 
-(defun ls-compile-block (sexps env fenv)
-  (join-trailing
-   (remove-if (lambda (x)
-                (or (null x)
-                    (and (stringp x)
-                         (zerop (length x)))))
-              (mapcar (lambda (x) (ls-compile x env fenv))  sexps))
-   (concat ";" *newline*)))
+;;; Special forms
+
+(defvar *compilations* nil)
 
 (defmacro define-compilation (name args &body 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))
+  ;; variable *ENVIRONMENT*.
+  `(push (list ',name (lambda ,args (block ,name ,@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)
+  (concat "(" (ls-compile condition) " !== " (ls-compile nil)
+          " ? " (ls-compile true)
+          " : " (ls-compile false)
           ")"))
 
-
 (defvar *lambda-list-keywords* '(&optional &rest))
 
 (defun list-until-keyword (list)
@@ -782,81 +1034,99 @@
       (error "Bad lambda-list"))
     (car rest)))
 
+
+(defun lambda-docstring-wrapper (docstring &rest strs)
+  (if docstring
+      (js!selfcall
+        "var func = " (join strs) ";" *newline*
+        "func.docstring = '" docstring "';" *newline*
+        "return func;" *newline*)
+      (join strs)))
+
 (define-compilation lambda (lambda-list &rest body)
   (let ((required-arguments (lambda-list-required-arguments lambda-list))
         (optional-arguments (lambda-list-optional-arguments lambda-list))
-        (rest-argument (lambda-list-rest-argument lambda-list)))
+        (rest-argument (lambda-list-rest-argument lambda-list))
+        documentation)
+    ;; Get the documentation string for the lambda function
+    (when (and (stringp (car body))
+               (not (null (cdr body))))
+      (setq documentation (car body))
+      (setq body (cdr body)))
     (let ((n-required-arguments (length required-arguments))
           (n-optional-arguments (length optional-arguments))
-          (new-env (extend-local-env
-                    (append (ensure-list rest-argument)
-                            required-arguments
-                            optional-arguments)
-                    env)))
-      (concat "(function ("
-              (join (mapcar (lambda (x)
-                              (lookup-variable-translation x new-env))
-                            (append required-arguments optional-arguments))
-                    ",")
-              "){" *newline*
-              ;; Check number of arguments
-              (indent
-               (if required-arguments
-                   (concat "if (arguments.length < " (integer-to-string n-required-arguments)
-                           ") throw 'too few arguments';" *newline*)
-                   "")
-               (if (not rest-argument)
-                   (concat "if (arguments.length > "
-                           (integer-to-string (+ n-required-arguments n-optional-arguments))
-                           ") throw 'too many arguments';" *newline*)
-                   "")
-               ;; Optional arguments
-               (if optional-arguments
-                   (concat "switch(arguments.length){" *newline*
-                           (let ((optional-and-defaults
-                                  (lambda-list-optional-arguments-with-default lambda-list))
-                                 (cases nil)
-                                 (idx 0))
-                             (progn
-                               (while (< idx n-optional-arguments)
-                                 (let ((arg (nth idx optional-and-defaults)))
-                                   (push (concat "case "
-                                                 (integer-to-string (+ idx n-required-arguments)) ":" *newline*
-                                                 (lookup-variable-translation (car arg) new-env)
-                                                 "="
-                                                 (ls-compile (cadr arg) new-env fenv)
-                                                 ";" *newline*)
-                                         cases)
-                                   (incf idx)))
-                                    (push (concat "default: break;" *newline*) cases)
-                                    (join (reverse cases))))
-                           "}" *newline*)
-                   "")
-               ;; &rest/&body argument
-               (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 (+ n-required-arguments n-optional-arguments))
-                             "; i--)" *newline*
-                             (indent js!rest " = "
-                                     "{car: arguments[i], cdr: ") js!rest "};"
-                                     *newline*))
-                   "")
-               ;; Body
-               (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)))
+          (*environment* (extend-local-env
+                          (append (ensure-list rest-argument)
+                                  required-arguments
+                                  optional-arguments))))
+      (lambda-docstring-wrapper
+       documentation
+       "(function ("
+       (join (mapcar #'translate-variable
+                     (append required-arguments optional-arguments))
+             ",")
+       "){" *newline*
+       ;; Check number of arguments
+       (indent
+        (if required-arguments
+            (concat "if (arguments.length < " (integer-to-string n-required-arguments)
+                    ") throw 'too few arguments';" *newline*)
+            "")
+        (if (not rest-argument)
+            (concat "if (arguments.length > "
+                    (integer-to-string (+ n-required-arguments n-optional-arguments))
+                    ") throw 'too many arguments';" *newline*)
+            "")
+        ;; Optional arguments
+        (if optional-arguments
+            (concat "switch(arguments.length){" *newline*
+                    (let ((optional-and-defaults
+                           (lambda-list-optional-arguments-with-default lambda-list))
+                          (cases nil)
+                          (idx 0))
+                      (progn
+                        (while (< idx n-optional-arguments)
+                          (let ((arg (nth idx optional-and-defaults)))
+                            (push (concat "case "
+                                          (integer-to-string (+ idx n-required-arguments)) ":" *newline*
+                                          (translate-variable (car arg))
+                                          "="
+                                          (ls-compile (cadr arg))
+                                          ";" *newline*)
+                                  cases)
+                            (incf idx)))
+                        (push (concat "default: break;" *newline*) cases)
+                        (join (reverse cases))))
+                    "}" *newline*)
+            "")
+        ;; &rest/&body argument
+        (if rest-argument
+            (let ((js!rest (translate-variable rest-argument)))
+              (concat "var " js!rest "= " (ls-compile nil) ";" *newline*
+                      "for (var i = arguments.length-1; i>="
+                      (integer-to-string (+ n-required-arguments n-optional-arguments))
+                      "; i--)" *newline*
+                      (indent js!rest " = "
+                              "{car: arguments[i], cdr: ") js!rest "};"
+                      *newline*))
+            "")
+        ;; Body
+        (ls-compile-block body t)) *newline*
+       "})"))))
 
 (define-compilation setq (var val)
-  (concat (lookup-variable-translation var env)
-          " = "
-           (ls-compile val env fenv)))
+  (let ((b (lookup-in-lexenv var *environment* 'variable)))
+    (if (eq (binding-type b) 'lexical-variable)
+        (concat (binding-value b) " = " (ls-compile val))
+        (ls-compile `(set ',var ,val)))))
+
+;;; FFI Variable accessors
+(define-compilation js-vref (var)
+  var)
+
+(define-compilation js-vset (var val)
+  (concat "(" var " = " (ls-compile val) ")"))
+
 
 ;;; Literals
 (defun escape-string (string)
@@ -874,73 +1144,247 @@
       (incf index))
     output))
 
-(defun literal->js (sexp)
+
+(defvar *literal-symbols* nil)
+(defvar *literal-counter* 0)
+
+(defun genlit ()
+  (concat "l" (integer-to-string (incf *literal-counter*))))
+
+(defun literal (sexp &optional recursive)
   (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))
+    ((symbolp sexp)
+     (or (cdr (assoc sexp *literal-symbols*))
+	 (let ((v (genlit))
+	       (s #+common-lisp (concat "{name: \"" (escape-string (symbol-name sexp)) "\"}")
+		  #+ecmalisp (ls-compile `(intern ,(symbol-name sexp)))))
+	   (push (cons sexp v) *literal-symbols*)
+	   (toplevel-compilation (concat "var " v " = " s))
+	   v)))
+    ((consp sexp)
+     (let ((c (concat "{car: " (literal (car sexp) t) ", "
+		      "cdr: " (literal (cdr sexp) t) "}")))
+       (if recursive
+	   c
+	   (let ((v (genlit)))
+	     (toplevel-compilation (concat "var " v " = " c))
+	     v))))))
 
 (define-compilation quote (sexp)
   (literal sexp))
 
-(define-compilation while (pred &rest body)
-  (concat "(function(){" *newline*
-          (indent "while("
-                  (ls-compile pred env fenv)
-                  " !== "
-                  (ls-compile nil nil nil) "){" *newline*
-                  (indent (ls-compile-block body env fenv)))
-          "}})()"))
+(define-compilation %while (pred &rest body)
+  (js!selfcall
+    "while(" (ls-compile pred) " !== " (ls-compile nil) "){" *newline*
+    (indent (ls-compile-block body))
+    "}"
+    "return " (ls-compile nil) ";" *newline*))
 
 (define-compilation function (x)
   (cond
     ((and (listp x) (eq (car x) 'lambda))
-     (ls-compile x env fenv))
+     (ls-compile x))
     ((symbolp x)
-     (lookup-function-translation x fenv))))
+     (ls-compile `(symbol-function ',x)))))
 
 (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)))
+     (ls-compile ,form)))
 
 (define-compilation progn (&rest body)
-  (concat "(function(){" *newline*
-          (indent (ls-compile-block (butlast body) env fenv)
-                  "return " (ls-compile (car (last body)) env fenv) ";" *newline*)
-          "})()"))
+  (js!selfcall (ls-compile-block body t)))
+
+(defun dynamic-binding-wrapper (bindings body)
+  (if (null bindings)
+      body
+      (concat
+       "try {" *newline*
+       (indent
+        "var tmp;" *newline*
+        (join
+         (mapcar (lambda (b)
+                   (let ((s (ls-compile `(quote ,(car b)))))
+                     (concat "tmp = " s ".value;" *newline*
+                             s ".value = " (cdr b) ";" *newline*
+                             (cdr b) " = tmp;" *newline*)))
+                 bindings))
+        body)
+       "}" *newline*
+       "finally {"  *newline*
+       (indent
+        (join-trailing
+         (mapcar (lambda (b)
+                   (let ((s (ls-compile `(quote ,(car b)))))
+                     (concat s ".value" " = " (cdr b))))
+                 bindings)
+         (concat ";" *newline*)))
+       "}" *newline*)))
+
 
 (define-compilation let (bindings &rest body)
   (let ((bindings (mapcar #'ensure-list bindings)))
     (let ((variables (mapcar #'first bindings))
           (values    (mapcar #'second bindings)))
-      (let ((new-env (extend-local-env variables env)))
+      (let ((cvalues (mapcar #'ls-compile values))
+            (*environment* (extend-local-env (remove-if #'boundp variables)))
+            (dynamic-bindings))
         (concat "(function("
                 (join (mapcar (lambda (x)
-                                (lookup-variable-translation x new-env))
+                                (if (boundp x)
+                                    (let ((v (gvarname x)))
+                                      (push (cons x v) dynamic-bindings)
+                                      v)
+                                    (translate-variable x)))
                               variables)
                       ",")
                 "){" *newline*
-                (indent (ls-compile-block (butlast body) new-env fenv)
-                        "return " (ls-compile (car (last body)) new-env fenv)
-                        ";" *newline*)
-                "})(" (join (mapcar (lambda (x) (ls-compile x env fenv))
-                                    values)
-                            ",")
-                ")")))))
+                (let ((body (ls-compile-block body t)))
+                  (indent (dynamic-binding-wrapper dynamic-bindings body)))
+                "})(" (join cvalues ",") ")")))))
+
+
+(defvar *block-counter* 0)
+
+(define-compilation block (name &rest body)
+  (let ((tr (integer-to-string (incf *block-counter*))))
+    (let ((b (make-binding name 'block tr)))
+      (js!selfcall
+        "try {" *newline*
+        (let ((*environment* (extend-lexenv (list b) *environment* 'block)))
+          (indent "return " (ls-compile `(progn ,@body)) ";" *newline*))
+        "}" *newline*
+        "catch (cf){" *newline*
+        "    if (cf.type == 'block' && cf.id == " tr ")" *newline*
+        "        return cf.value;" *newline*
+        "    else" *newline*
+        "        throw cf;" *newline*
+        "}" *newline*))))
+
+(define-compilation return-from (name &optional value)
+  (let ((b (lookup-in-lexenv name *environment* 'block)))
+    (if b
+        (js!selfcall
+          "throw ({"
+          "type: 'block', "
+          "id: " (binding-value b) ", "
+          "value: " (ls-compile value) ", "
+          "message: 'Return from unknown block " (symbol-name name) ".'"
+          "})")
+        (error (concat "Unknown block `" (symbol-name name) "'.")))))
+
+
+(define-compilation catch (id &rest body)
+  (js!selfcall
+    "var id = " (ls-compile id) ";" *newline*
+    "try {" *newline*
+    (indent "return " (ls-compile `(progn ,@body))
+            ";" *newline*)
+    "}" *newline*
+    "catch (cf){" *newline*
+    "    if (cf.type == 'catch' && cf.id == id)" *newline*
+    "        return cf.value;" *newline*
+    "    else" *newline*
+    "        throw cf;" *newline*
+    "}" *newline*))
+
+(define-compilation throw (id value)
+  (js!selfcall
+    "throw ({"
+    "type: 'catch', "
+    "id: " (ls-compile id) ", "
+    "value: " (ls-compile value) ", "
+    "message: 'Throw uncatched.'"
+    "})"))
+
+
+(defvar *tagbody-counter* 0)
+(defvar *go-tag-counter* 0)
+
+(defun go-tag-p (x)
+  (or (integerp x) (symbolp x)))
+
+(defun declare-tagbody-tags (tbidx body)
+  (let ((bindings
+         (mapcar (lambda (label)
+                   (let ((tagidx (integer-to-string (incf *go-tag-counter*))))
+                     (make-binding label 'gotag (list tbidx tagidx))))
+                 (remove-if-not #'go-tag-p body))))
+    (extend-lexenv bindings *environment* 'gotag)))
+
+(define-compilation tagbody (&rest body)
+  ;; Ignore the tagbody if it does not contain any go-tag. We do this
+  ;; because 1) it is easy and 2) many built-in forms expand to a
+  ;; implicit tagbody, so we save some space.
+  (unless (some #'go-tag-p body)
+    (return-from tagbody (ls-compile `(progn ,@body nil))))
+  ;; The translation assumes the first form in BODY is a label
+  (unless (go-tag-p (car body))
+    (push (gensym "START") body))
+  ;; Tagbody compilation
+  (let ((tbidx (integer-to-string *tagbody-counter*)))
+    (let ((*environment* (declare-tagbody-tags tbidx body))
+          initag)
+      (let ((b (lookup-in-lexenv (first body) *environment* 'gotag)))
+        (setq initag (second (binding-value b))))
+      (js!selfcall
+        "var tagbody_" tbidx " = " initag ";" *newline*
+        "tbloop:" *newline*
+        "while (true) {" *newline*
+        (indent "try {" *newline*
+                (indent (let ((content ""))
+                          (concat "switch(tagbody_" tbidx "){" *newline*
+                                  "case " initag ":" *newline*
+                                  (dolist (form (cdr body) content)
+                                    (concatf content
+                                      (if (not (go-tag-p form))
+                                          (indent (ls-compile form) ";" *newline*)
+                                          (let ((b (lookup-in-lexenv form *environment* 'gotag)))
+                                            (concat "case " (second (binding-value b)) ":" *newline*)))))
+                                  "default:" *newline*
+                                  "    break tbloop;" *newline*
+                                  "}" *newline*)))
+                "}" *newline*
+                "catch (jump) {" *newline*
+                "    if (jump.type == 'tagbody' && jump.id == " tbidx ")" *newline*
+                "        tagbody_" tbidx " = jump.label;" *newline*
+                "    else" *newline*
+                "        throw(jump);" *newline*
+                "}" *newline*)
+        "}" *newline*
+        "return " (ls-compile nil) ";" *newline*))))
+
+(define-compilation go (label)
+  (let ((b (lookup-in-lexenv label *environment* 'gotag))
+        (n (cond
+             ((symbolp label) (symbol-name label))
+             ((integerp label) (integer-to-string label)))))
+    (if b
+        (js!selfcall
+          "throw ({"
+          "type: 'tagbody', "
+          "id: " (first (binding-value b)) ", "
+          "label: " (second (binding-value b)) ", "
+          "message: 'Attempt to GO to non-existing tag " n "'"
+          "})" *newline*)
+        (error (concat "Unknown tag `" n "'.")))))
+
+
+(define-compilation unwind-protect (form &rest clean-up)
+  (js!selfcall
+    "var ret = " (ls-compile nil) ";" *newline*
+    "try {" *newline*
+    (indent "ret = " (ls-compile form) ";" *newline*)
+    "} finally {" *newline*
+    (indent (ls-compile-block clean-up))
+    "}" *newline*
+    "return ret;" *newline*))
+
 
 ;;; A little backquote implementation without optimizations of any
 ;;; kind for ecmalisp.
@@ -979,32 +1423,37 @@
 
 ;;; Primitives
 
-(defmacro define-builtin (name args &body body)
-  `(define-compilation ,name ,args
-     (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg env fenv))) args)
-       ,@body)))
+(defvar *builtins* nil)
+
+(defmacro define-raw-builtin (name args &body body)
+  ;; Creates a new primitive function `name' with parameters args and
+  ;; @body. The body can access to the local environment through the
+  ;; variable *ENVIRONMENT*.
+  `(push (list ',name (lambda ,args (block ,name ,@body)))
+         *builtins*))
 
-(defun compile-bool (x)
-  (concat "(" x "?" (ls-compile t nil nil) ": " (ls-compile nil nil nil) ")"))
+(defmacro define-builtin (name args &body body)
+  `(progn
+     (define-raw-builtin ,name ,args
+       (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg))) args)
+         ,@body))))
 
 ;;; DECLS is a list of (JSVARNAME TYPE LISPFORM) declarations.
 (defmacro type-check (decls &body body)
-  `(concat "(function(){" *newline*
-           (indent ,@(mapcar (lambda (decl)
-                               `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
-                             decls)
-
-                   ,@(mapcar (lambda (decl)
-                               `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
-                                        (indent "throw 'The value ' + "
-                                                ,(first decl)
-                                                " + ' is not a type "
-                                                ,(second decl)
-                                                ".';"
-                                                *newline*)))
-                             decls)
-                   (concat "return " (progn ,@body) ";" *newline*))
-           "})()"))
+  `(js!selfcall
+     ,@(mapcar (lambda (decl)
+                   `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
+                 decls)
+     ,@(mapcar (lambda (decl)
+                 `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
+                          (indent "throw 'The value ' + "
+                                  ,(first decl)
+                                  " + ' is not a type "
+                                  ,(second decl)
+                                  ".';"
+                                  *newline*)))
+               decls)
+     (concat "return " (progn ,@body) ";" *newline*)))
 
 (defun num-op-num (x op y)
   (type-check (("x" "number" x) ("y" "number" y))
@@ -1017,42 +1466,41 @@
 
 (define-builtin mod (x y) (num-op-num x "%" y))
 
-(define-builtin < (x y)  (compile-bool (num-op-num x "<" y)))
-(define-builtin > (x y)  (compile-bool (num-op-num x ">" y)))
-(define-builtin = (x y)  (compile-bool (num-op-num x "==" y)))
-(define-builtin <= (x y) (compile-bool (num-op-num x "<=" y)))
-(define-builtin >= (x y) (compile-bool (num-op-num x ">=" y)))
+(define-builtin < (x y)  (js!bool (num-op-num x "<" y)))
+(define-builtin > (x y)  (js!bool (num-op-num x ">" y)))
+(define-builtin = (x y)  (js!bool (num-op-num x "==" y)))
+(define-builtin <= (x y) (js!bool (num-op-num x "<=" y)))
+(define-builtin >= (x y) (js!bool (num-op-num x ">=" y)))
 
 (define-builtin numberp (x)
-  (compile-bool (concat "(typeof (" x ") == \"number\")")))
+  (js!bool (concat "(typeof (" x ") == \"number\")")))
 
 (define-builtin floor (x)
   (type-check (("x" "number" x))
     "Math.floor(x)"))
 
-(define-builtin cons (x y) (concat "({car: " x ", cdr: " y "})"))
+(define-builtin cons (x y)
+  (concat "({car: " x ", cdr: " y "})"))
+
 (define-builtin consp (x)
-  (compile-bool
-   (concat "(function(){" *newline*
-           (indent "var tmp = " x ";" *newline*
-                   "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)
-           "})()")))
+  (js!bool
+   (js!selfcall
+     "var tmp = " x ";" *newline*
+     "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)))
 
 (define-builtin car (x)
-  (concat "(function(){" *newline*
-          (indent "var tmp = " x ";" *newline*
-                  "return tmp === " (ls-compile nil nil nil)
-                  "? " (ls-compile nil nil nil)
-                  ": tmp.car;" *newline*)
-          "})()"))
+  (js!selfcall
+    "var tmp = " x ";" *newline*
+    "return tmp === " (ls-compile nil)
+    "? " (ls-compile nil)
+    ": tmp.car;" *newline*))
 
 (define-builtin cdr (x)
-  (concat "(function(){" *newline*
-          (indent "var tmp = " x ";" *newline*
-                  "return tmp === " (ls-compile nil nil nil) "? "
-                  (ls-compile nil nil nil)
-                  ": tmp.cdr;" *newline*)
-          "})()"))
+  (js!selfcall
+    "var tmp = " x ";" *newline*
+    "return tmp === " (ls-compile nil) "? "
+    (ls-compile nil)
+    ": tmp.cdr;" *newline*))
 
 (define-builtin setcar (x new)
   (type-check (("x" "object" x))
@@ -1063,11 +1511,10 @@
     (concat "(x.cdr = " new ")")))
 
 (define-builtin symbolp (x)
-  (compile-bool
-   (concat "(function(){" *newline*
-           (indent "var tmp = " x ";" *newline*
-                   "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)
-           "})()")))
+  (js!bool
+   (js!selfcall
+     "var tmp = " x ";" *newline*
+     "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)))
 
 (define-builtin make-symbol (name)
   (type-check (("name" "string" name))
@@ -1076,15 +1523,45 @@
 (define-builtin symbol-name (x)
   (concat "(" x ").name"))
 
-(define-builtin eq    (x y) (compile-bool (concat "(" x " === " y ")")))
-(define-builtin equal (x y) (compile-bool (concat "(" x  " == " y ")")))
+(define-builtin set (symbol value)
+  (concat "(" symbol ").value = " value))
+
+(define-builtin fset (symbol value)
+  (concat "(" symbol ").function = " value))
+
+(define-builtin boundp (x)
+  (js!bool (concat "(" x ".value !== undefined)")))
+
+(define-builtin symbol-value (x)
+  (js!selfcall
+    "var symbol = " x ";" *newline*
+    "var value = symbol.value;" *newline*
+    "if (value === undefined) throw \"Variable `\" + symbol.name + \"' is unbound.\";" *newline*
+    "return value;" *newline*))
+
+(define-builtin symbol-function (x)
+  (js!selfcall
+    "var symbol = " x ";" *newline*
+    "var func = symbol.function;" *newline*
+    "if (func === undefined) throw \"Function `\" + symbol.name + \"' is undefined.\";" *newline*
+    "return func;" *newline*))
+
+(define-builtin symbol-plist (x)
+  (concat "((" x ").plist || " (ls-compile nil) ")"))
+
+(define-builtin lambda-code (x)
+  (concat "(" x ").toString()"))
+
+
+(define-builtin eq    (x y) (js!bool (concat "(" x " === " y ")")))
+(define-builtin equal (x y) (js!bool (concat "(" x  " == " y ")")))
 
-(define-builtin string (x)
+(define-builtin char-to-string (x)
   (type-check (("x" "number" x))
     "String.fromCharCode(x)"))
 
 (define-builtin stringp (x)
-  (compile-bool (concat "(typeof(" x ") == \"string\")")))
+  (js!bool (concat "(typeof(" x ") == \"string\")")))
 
 (define-builtin string-upcase (x)
   (type-check (("x" "string" x))
@@ -1094,16 +1571,15 @@
   (type-check (("x" "string" x))
     "x.length"))
 
-(define-compilation slice (string a &optional b)
-  (concat "(function(){" *newline*
-          (indent "var str = " (ls-compile string env fenv) ";" *newline*
-                  "var a = " (ls-compile a env fenv) ";" *newline*
-                  "var b;" *newline*
-                  (if b
-                      (concat "b = " (ls-compile b env fenv) ";" *newline*)
-                      "")
-                  "return str.slice(a,b);" *newline*)
-          "})()"))
+(define-raw-builtin slice (string a &optional b)
+  (js!selfcall
+    "var str = " (ls-compile string) ";" *newline*
+    "var a = " (ls-compile a) ";" *newline*
+    "var b;" *newline*
+    (if b
+        (concat "b = " (ls-compile b) ";" *newline*)
+        "")
+    "return str.slice(a,b);" *newline*))
 
 (define-builtin char (string index)
   (type-check (("string" "string" string)
@@ -1115,110 +1591,147 @@
                ("string2" "string" string2))
     "string1.concat(string2)"))
 
-(define-compilation funcall (func &rest args)
-  (concat "(" (ls-compile func env fenv) ")("
-          (join (mapcar (lambda (x)
-                          (ls-compile x env fenv))
-                        args)
+(define-raw-builtin funcall (func &rest args)
+  (concat "(" (ls-compile func) ")("
+          (join (mapcar #'ls-compile args)
                 ", ")
           ")"))
 
-(define-compilation apply (func &rest args)
+(define-raw-builtin apply (func &rest args)
   (if (null args)
-      (concat "(" (ls-compile func env fenv) ")()")
+      (concat "(" (ls-compile func) ")()")
       (let ((args (butlast args))
             (last (car (last args))))
-        (concat "(function(){" *newline*
-                (indent "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*
-                        (indent "while (tail != " (ls-compile nil env fenv) "){" *newline*
-                                "    args.push(tail.car);" *newline*
-                                "    tail = tail.cdr;" *newline*
-                                "}" *newline*
-                                "return f.apply(this, args);" *newline*)
-                        "})()")))))
+        (js!selfcall
+          "var f = " (ls-compile func) ";" *newline*
+          "var args = [" (join (mapcar #'ls-compile args)
+                               ", ")
+          "];" *newline*
+          "var tail = (" (ls-compile last) ");" *newline*
+          "while (tail != " (ls-compile nil) "){" *newline*
+          "    args.push(tail.car);" *newline*
+          "    tail = tail.cdr;" *newline*
+          "}" *newline*
+          "return f.apply(this, args);" *newline*))))
 
 (define-builtin js-eval (string)
   (type-check (("string" "string" string))
     "eval.apply(window, [string])"))
 
 (define-builtin error (string)
-  (concat "(function (){ throw " string "; })()"))
+  (js!selfcall "throw " string ";" *newline*))
 
 (define-builtin new () "{}")
 
-(define-builtin get (object key)
-  (concat "(function(){" *newline*
-          (indent "var tmp = " "(" object ")[" key "];" *newline*
-                  "return tmp == undefined? " (ls-compile nil nil nil) ": tmp ;" *newline*)
-          "})()"))
+(define-builtin objectp (x)
+  (js!bool (concat "(typeof (" x ") === 'object')")))
+
+(define-builtin oget (object key)
+  (js!selfcall
+    "var tmp = " "(" object ")[" key "];" *newline*
+    "return tmp == undefined? " (ls-compile nil) ": tmp ;" *newline*))
 
-(define-builtin set (object key value)
+(define-builtin oset (object key value)
   (concat "((" object ")[" key "] = " value ")"))
 
 (define-builtin in (key object)
-  (compile-bool (concat "((" key ") in (" object "))")))
+  (js!bool (concat "((" key ") in (" object "))")))
 
 (define-builtin functionp (x)
-  (compile-bool (concat "(typeof " x " == 'function')")))
+  (js!bool (concat "(typeof " x " == 'function')")))
 
 (define-builtin write-string (x)
   (type-check (("x" "string" x))
     "lisp.write(x)"))
 
-(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)
+(defun macro (x)
+  (and (symbolp x)
+       (let ((b (lookup-in-lexenv x *environment* 'function)))
+         (and (eq (binding-type b) 'macro)
+              b))))
+
+(defun ls-macroexpand-1 (form)
+  (let ((macro-binding (macro (car form))))
+    (if macro-binding
+        (let ((expander (binding-value macro-binding)))
+          (when (listp expander)
+            (let ((compiled (eval expander)))
+              ;; The list representation are useful while
+              ;; bootstrapping, as we can dump the definition of the
+              ;; macros easily, but they are slow because we have to
+              ;; evaluate them and compile them now and again. So, let
+              ;; us replace the list representation version of the
+              ;; function with the compiled one.
+              ;;
+              #+ecmalisp (set-binding-value macro-binding compiled)
+              (setq expander compiled)))
+          (apply expander (cdr form)))
+        form)))
+
+(defun compile-funcall (function args)
+  (if (and (symbolp function)
+           (claimp function 'function 'non-overridable))
+      (concat (ls-compile `',function) ".function("
+              (join (mapcar #'ls-compile args)
+                    ", ")
+              ")")
+      (concat (ls-compile `#',function) "("
+              (join (mapcar #'ls-compile args)
+                    ", ")
+              ")")))
+
+(defun ls-compile-block (sexps &optional return-last-p)
+  (if return-last-p
+      (concat (ls-compile-block (butlast sexps))
+              "return " (ls-compile (car (last sexps))) ";")
+      (join-trailing
+       (remove-if #'null-or-empty-p (mapcar #'ls-compile sexps))
+       (concat ";" *newline*))))
+
+(defun ls-compile (sexp)
   (cond
-    ((symbolp sexp) (lookup-variable-translation sexp env))
+    ((symbolp sexp)
+     (let ((b (lookup-in-lexenv sexp *environment* 'variable)))
+       (cond
+         ((eq (binding-type b) 'lexical-variable)
+          (binding-value b))
+         ((claimp sexp 'variable 'constant)
+          (concat (ls-compile `',sexp) ".value"))
+         (t
+          (ls-compile `(symbol-value ',sexp))))))
     ((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))))))
+     (let ((name (car sexp))
+           (args (cdr sexp)))
+       (cond
+         ;; Special forms
+         ((assoc name *compilations*)
+          (let ((comp (second (assoc name *compilations*))))
+            (apply comp args)))
+         ;; Built-in functions
+         ((and (assoc name *builtins*)
+               (not (claimp name 'function 'notinline)))
+          (let ((comp (second (assoc name *builtins*))))
+            (apply comp args)))
+         (t
+          (if (macro name)
+              (ls-compile (ls-macroexpand-1 sexp))
+              (compile-funcall name args))))))))
 
 (defun ls-compile-toplevel (sexp)
-  (setq *toplevel-compilations* nil)
-  (let ((code (ls-compile sexp nil nil)))
-    (prog1
-        (concat (join (mapcar (lambda (x) (concat x ";" *newline*))
-                              *toplevel-compilations*))
-                code)
-      (setq *toplevel-compilations* nil))))
+  (let ((*toplevel-compilations* nil))
+    (cond
+      ((and (consp sexp) (eq (car sexp) 'progn))
+       (let ((subs (mapcar #'ls-compile-toplevel (cdr sexp))))
+         (join (remove-if #'null-or-empty-p subs))))
+      (t
+       (let ((code (ls-compile sexp)))
+         (concat (join-trailing (get-toplevel-compilations)
+                                (concat ";" *newline*))
+                 (if code
+                     (concat code ";" *newline*)
+                     "")))))))
 
 
 ;;; Once we have the compiler, we define the runtime environment and
@@ -1227,46 +1740,69 @@
 
 #+ecmalisp
 (progn
- (defmacro with-compilation-unit (&body 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))))
-     (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))
-         (c6 (ls-compile `(setq *gensym-counter* ',*gensym-counter*) nil nil)))
-     (setq *toplevel-compilations*
-           (append *toplevel-compilations* (list c1 c2 c3 c4 c5 c6)))))
-
- (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*)))
+  (defmacro with-compilation-unit (&body body)
+    `(prog1
+         (progn
+           (setq *compilation-unit-checks* nil)
+           ,@body)
+       (dolist (check *compilation-unit-checks*)
+         (funcall check))))
+
+  (defun eval (x)
+    (let ((code
+           (with-compilation-unit
+               (ls-compile-toplevel x))))
+      (js-eval code)))
+
+  (export '(* *gensym-counter* *package* + - / 1+ 1- < <= = = > >= and append
+            apply assoc atom block boundp boundp butlast caar cadddr
+            caddr cadr car car case catch cdar cdddr cddr cdr cdr char
+            char-code char= code-char cond cons consp copy-list decf
+            declaim defparameter defun defvar digit-char-p disassemble
+            documentation dolist dotimes ecase eq eql equal error eval
+            every export fdefinition find-package find-symbol first
+            fourth fset funcall function functionp gensym go identity
+            in-package incf integerp integerp intern lambda-code last
+            length let list listp make-package make-symbol mapcar
+            member minusp mod nil not nth nthcdr null numberp or
+            package-name package-use-list packagep plusp
+            prin1-to-string print proclaim prog1 prog2 pron push quote
+            remove remove-if remove-if-not return return-from
+            revappend reverse second set setq some string-upcase
+            string string= stringp subseq symbol-function symbol-name
+            symbol-package symbol-plist symbol-value symbolp t tagbody
+            third throw truncate unless unwind-protect variable warn
+            when write-line write-string zerop))
+
+  (setq *package* *user-package*)
+
+  (js-eval "var lisp")
+  (js-vset "lisp" (new))
+  (js-vset "lisp.read" #'ls-read-from-string)
+  (js-vset "lisp.print" #'prin1-to-string)
+  (js-vset "lisp.eval" #'eval)
+  (js-vset "lisp.compile" #'ls-compile-toplevel)
+  (js-vset "lisp.evalString" (lambda (str) (eval (ls-read-from-string str))))
+  (js-vset "lisp.compileString" (lambda (str) (ls-compile-toplevel (ls-read-from-string str))))
+
+  ;; Set the initial global environment to be equal to the host global
+  ;; environment at this point of the compilation.
+  (eval-when-compile
+    (toplevel-compilation
+     (ls-compile
+      `(progn
+         ,@(mapcar (lambda (s) `(%intern-symbol (js-vref ,(cdr s))))
+                   *literal-symbols*)
+         (setq *literal-symbols* ',*literal-symbols*)
+         (setq *environment* ',*environment*)
+         (setq *variable-counter* ,*variable-counter*)
+         (setq *gensym-counter* ,*gensym-counter*)
+         (setq *block-counter* ,*block-counter*)))))
+
+  (eval-when-compile
+    (toplevel-compilation
+     (ls-compile
+      `(setq *literal-counter* ,*literal-counter*)))))
 
 
 ;;; Finally, we provide a couple of functions to easily bootstrap
@@ -1281,7 +1817,6 @@
         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))
@@ -1291,14 +1826,16 @@
            until (eq x *eof*)
            for compilation = (ls-compile-toplevel x)
            when (plusp (length compilation))
-           do (write-line (concat compilation "; ") out))
+           do (write-string compilation out))
         (dolist (check *compilation-unit-checks*)
           (funcall check))
         (setq *compilation-unit-checks* nil))))
 
   (defun bootstrap ()
+    (setq *environment* (make-lexenv))
+    (setq *literal-symbols* nil)
     (setq *variable-counter* 0
           *gensym-counter* 0
-          *function-counter* 0
-          *literal-counter* 0)
+          *literal-counter* 0
+          *block-counter* 0)
     (ls-compile-file "ecmalisp.lisp" "ecmalisp.js")))