X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=inline;f=src%2Fcompiler.lisp;h=866cea2f1bf4305a8911f792a41e7a20b0fbd9bd;hb=18c8e6a2d7bdc53f5a95c1a29b8913ee66a415d6;hp=d2999027f4e33415c06e651404dcd8c26c6e0900;hpb=30ee997b7de86ee4899ccb2467bea03ad71491cb;p=jscl.git

diff --git a/src/compiler.lisp b/src/compiler.lisp
index d299902..866cea2 100644
--- a/src/compiler.lisp
+++ b/src/compiler.lisp
@@ -228,7 +228,7 @@
   (flet ((canonicalize (keyarg)
 	   ;; Build a canonical keyword argument descriptor, filling
 	   ;; the optional fields. The result is a list of the form
-	   ;; ((keyword-name var) init-form).
+	   ;; ((keyword-name var) init-form svar).
            (let ((arg (ensure-list keyarg)))
              (cons (if (listp (car arg))
                        (car arg)
@@ -251,8 +251,8 @@
   (if (or name docstring)
       (js!selfcall*
         `(var (func ,code))
-        (when name      `(= (get func |fname|) ,name))
-        (when docstring `(= (get func |docstring|) ,docstring))
+        (when name      `(= (get func "fname") ,name))
+        (when docstring `(= (get func "docstring") ,docstring))
         `(return func))
       code))
 
@@ -265,50 +265,44 @@
     (block nil
       ;; Special case: a positive exact number of arguments.
       (when (and (< 0 min) (eql min max))
-        (return `(code "checkArgs(nargs, " ,min ");")))
+        (return `(call |checkArgs| |nargs| ,min)))
       ;; General case:
-      `(code
-        ,(when (< 0 min)
-           `(code "checkArgsAtLeast(nargs, " ,min ");"))
-        ,(when (numberp max)
-           `(code "checkArgsAtMost(nargs, " ,max ");"))))))
+      `(progn
+         ,(when (< 0 min)     `(call |checkArgsAtLeast| |nargs| ,min))
+         ,(when (numberp max) `(call |checkArgsAtMost|  |nargs| ,max))))))
 
 (defun compile-lambda-optional (ll)
   (let* ((optional-arguments (ll-optional-arguments-canonical ll))
 	 (n-required-arguments (length (ll-required-arguments ll)))
 	 (n-optional-arguments (length optional-arguments)))
     (when optional-arguments
-      `(code "switch(nargs){"
-             ,(let ((cases nil)
-                    (idx 0))
-                   (progn
-                     (while (< idx n-optional-arguments)
-                       (let ((arg (nth idx optional-arguments)))
-                         (push `(code "case " ,(+ idx n-required-arguments) ":"
-                                      (code ,(translate-variable (car arg))
-                                            "="
-                                            ,(ls-compile (cadr arg)) ";")
-                                      ,(when (third arg)
-                                         `(code ,(translate-variable (third arg))
-                                                "="
-                                                ,(ls-compile nil)
-                                                ";")))
-                               cases)
-                         (incf idx)))
-                     (push `(code "default: break;") cases)
-                     `(code ,@(reverse cases))))
-             "}"))))
+      `(switch |nargs|
+               ,@(with-collect
+                  (dotimes (idx n-optional-arguments)
+                    (let ((arg (nth idx optional-arguments)))
+                      (collect `(case ,(+ idx n-required-arguments)))
+                      (collect `(= ,(make-symbol (translate-variable (car arg)))
+                                   ,(ls-compile (cadr arg))))
+                      (collect (when (third arg)
+                                 `(= ,(make-symbol (translate-variable (third arg)))
+                                     ,(ls-compile nil))))))
+                  (collect 'default)
+                  (collect '(break)))))))
 
 (defun compile-lambda-rest (ll)
   (let ((n-required-arguments (length (ll-required-arguments ll)))
 	(n-optional-arguments (length (ll-optional-arguments ll)))
 	(rest-argument (ll-rest-argument ll)))
     (when rest-argument
-      (let ((js!rest (translate-variable rest-argument)))
-        `(code "var " ,js!rest "= " ,(ls-compile nil) ";"
-               "for (var i = nargs-1; i>=" ,(+ n-required-arguments n-optional-arguments)
-               "; i--)"
-               (code ,js!rest " = {car: arguments[i+2], cdr: " ,js!rest "};"))))))
+      (let ((js!rest (make-symbol (translate-variable rest-argument))))
+        `(progn
+           (var (,js!rest ,(ls-compile nil)))
+           (var i)
+           (for ((= i (- |nargs| 1))
+                 (>= i ,(+ n-required-arguments n-optional-arguments))
+                 (post-- i))
+                (= ,js!rest (object "car" (property |arguments| (+ i 2))
+                                    "cdr" ,js!rest))))))))
 
 (defun compile-lambda-parse-keywords (ll)
   (let ((n-required-arguments
@@ -317,55 +311,62 @@
 	 (length (ll-optional-arguments ll)))
 	(keyword-arguments
 	 (ll-keyword-arguments-canonical ll)))
-    `(code
-      ;; Declare variables
-      ,@(mapcar (lambda (arg)
-                  (let ((var (second (car arg))))
-                    `(code "var " ,(translate-variable var) "; "
-                           ,(when (third arg)
-                              `(code "var " ,(translate-variable (third arg))
-                                     " = " ,(ls-compile nil)
-                                     ";" )))))
-                keyword-arguments)
-      ;; Parse keywords
-      ,(flet ((parse-keyword (keyarg)
-               ;; ((keyword-name var) init-form)
-               `(code "for (i=" ,(+ n-required-arguments n-optional-arguments)
-                      "; i<nargs; i+=2){"
-                      "if (arguments[i+2] === " ,(ls-compile (caar keyarg)) "){"
-                      ,(translate-variable (cadr (car keyarg)))
-                      " = arguments[i+3];"
-                      ,(let ((svar (third keyarg)))
-                            (when svar
-                              `(code ,(translate-variable svar) " = " ,(ls-compile t) ";" )))
-                      "break;"
-                      "}"
-                      "}"
-                      ;; Default value
-                      "if (i == nargs){"
-                      ,(translate-variable (cadr (car keyarg)))
-                      " = "
-                      ,(ls-compile (cadr keyarg))
-                      ";"
-                      "}")))
-        (when keyword-arguments
-          `(code "var i;"
-                 ,@(mapcar #'parse-keyword keyword-arguments))))
-      ;; Check for unknown keywords
-      ,(when keyword-arguments
-        `(code "var start = " ,(+ n-required-arguments n-optional-arguments) ";"
-               "if ((nargs - start) % 2 == 1){"
-               "throw 'Odd number of keyword arguments';" 
-               "}"
-               "for (i = start; i<nargs; i+=2){"
-               "if ("
-               ,@(interleave (mapcar (lambda (x)
-                                       `(code "arguments[i+2] !== " ,(ls-compile (caar x))))
-                                     keyword-arguments)
-                            " && ")
-               ")"
-               "throw 'Unknown keyword argument ' + xstring(arguments[i+2].name);" 
-               "}" )))))
+    `(progn
+       ;; Declare variables
+       ,@(with-collect
+          (dolist (keyword-argument keyword-arguments)
+            (destructuring-bind ((keyword-name var) &optional initform svar)
+                keyword-argument
+              (declare (ignore keyword-name initform))
+              (collect `(var ,(make-symbol (translate-variable var))))
+              (when svar
+                (collect
+                    `(var (,(make-symbol (translate-variable svar))
+                            ,(ls-compile nil))))))))
+       
+       ;; Parse keywords
+       ,(flet ((parse-keyword (keyarg)
+                (destructuring-bind ((keyword-name var) &optional initform svar) keyarg
+                  ;; ((keyword-name var) init-form svar)
+                  `(progn
+                     (for ((= i ,(+ n-required-arguments n-optional-arguments))
+                           (< i |nargs|)
+                           (+= i 2))
+                          ;; ....
+                          (if (=== (property |arguments| (+ i 2))
+                                   ,(ls-compile keyword-name))
+                              (progn
+                                (= ,(make-symbol (translate-variable var))
+                                   (property |arguments| (+ i 3)))
+                                ,(when svar `(= ,(make-symbol (translate-variable svar))
+                                                ,(ls-compile t)))
+                                (break))))
+                     (if (== i |nargs|)
+                         (= ,(make-symbol (translate-variable var))
+                            ,(ls-compile initform)))))))
+         (when keyword-arguments
+           `(progn
+              (var i)
+              ,@(mapcar #'parse-keyword keyword-arguments))))
+       
+       ;; Check for unknown keywords
+       ,(when keyword-arguments
+         `(progn
+            (var (start ,(+ n-required-arguments n-optional-arguments)))
+            (if (== (% (- |nargs| start) 2) 1)
+                (throw "Odd number of keyword arguments."))
+            (for ((= i start) (< i |nargs|) (+= i 2))
+                 (if (and ,@(mapcar (lambda (keyword-argument)
+                                 (destructuring-bind ((keyword-name var) &optional initform svar)
+                                     keyword-argument
+                                   (declare (ignore var initform svar))
+                                   `(!== (property |arguments| (+ i 2)) ,(ls-compile keyword-name))))
+                               keyword-arguments))
+                     (throw (+ "Unknown keyword argument "
+                               (call |xstring|
+                                     (property
+                                      (property |arguments| (+ i 2))
+                                      "name")))))))))))
 
 (defun parse-lambda-list (ll)
   (values (ll-required-arguments ll)
@@ -417,26 +418,21 @@
                                     keyword-arguments
                                     (ll-svars ll)))))
         (lambda-name/docstring-wrapper name documentation
-         `(code
-           "(function ("
-           ,(join (list* "values"
-                         "nargs"
-                         (mapcar #'translate-variable
-                                 (append required-arguments optional-arguments)))
-                  ",")
-           "){"
-           ;; Check number of arguments
-           ,(lambda-check-argument-count n-required-arguments
-                                         n-optional-arguments
-                                         (or rest-argument keyword-arguments))
-           ,(compile-lambda-optional ll)
-           ,(compile-lambda-rest ll)
-           ,(compile-lambda-parse-keywords ll)
-           ,(let ((*multiple-value-p* t))
-                 (if block
-                     (ls-compile-block `((block ,block ,@body)) t)
-                     (ls-compile-block body t)))
-           "})"))))))
+         `(function (|values| |nargs| ,@(mapcar (lambda (x)
+                                                  (make-symbol (translate-variable x)))
+                                                (append required-arguments optional-arguments)))
+                     ;; Check number of arguments
+                    ,(lambda-check-argument-count n-required-arguments
+                                                  n-optional-arguments
+                                                  (or rest-argument keyword-arguments))
+                    ,(compile-lambda-optional ll)
+                    ,(compile-lambda-rest ll)
+                    ,(compile-lambda-parse-keywords ll)
+
+                    ,(let ((*multiple-value-p* t))
+                          (if block
+                              (ls-compile-block `((block ,block ,@body)) t)
+                              (ls-compile-block body t)))))))))
 
 
 (defun setq-pair (var val)
@@ -573,11 +569,7 @@
     ((and (listp x) (eq (car x) 'lambda))
      (compile-lambda (cadr x) (cddr x)))
     ((and (listp x) (eq (car x) 'named-lambda))
-     ;; TODO: destructuring-bind now! Do error checking manually is
-     ;; very annoying.
-     (let ((name (cadr x))
-           (ll (caddr x))
-           (body (cdddr x)))
+     (destructuring-bind (name ll &rest body) (cdr x)
        (compile-lambda ll body
                        :name (symbol-name name)
                        :block name)))
@@ -609,11 +601,9 @@
           (extend-lexenv (mapcar #'make-function-binding fnames)
                          *environment*
                          'function)))
-    `(code "(function("
-           ,@(interleave (mapcar #'translate-function fnames) ",")
-           "){"
-           ,(ls-compile-block body t)
-           "})(" ,@(interleave cfuncs ",") ")")))
+    `(call (function ,(mapcar #'make-symbol (mapcar #'translate-function fnames))
+                ,(ls-compile-block body t))
+           ,@cfuncs)))
 
 (define-compilation labels (definitions &rest body)
   (let* ((fnames (mapcar #'car definitions))
@@ -621,13 +611,13 @@
           (extend-lexenv (mapcar #'make-function-binding fnames)
                          *environment*
                          'function)))
-    (js!selfcall
-      `(code ,@(mapcar (lambda (func)
-                         `(code "var " ,(translate-function (car func))
-                                " = " ,(compile-lambda (cadr func)
-                                                       `((block ,(car func) ,@(cddr func))))
-                                ";" ))
-                       definitions))
+    (js!selfcall*
+      `(progn
+         ,@(mapcar (lambda (func)
+                     `(var (,(make-symbol (translate-function (car func)))
+                             ,(compile-lambda (cadr func)
+                                              `((block ,(car func) ,@(cddr func)))))))
+                   definitions))
       (ls-compile-block body t))))
 
 
@@ -674,26 +664,20 @@
 (defun let-binding-wrapper (bindings body)
   (when (null bindings)
     (return-from let-binding-wrapper body))
-  `(code
-    "try {"
-    (code "var tmp;"
-          ,@(mapcar
-             (lambda (b)
-               (let ((s (ls-compile `(quote ,(car b)))))
-                 `(code "tmp = " ,s ".value;"
-                        ,s ".value = " ,(cdr b) ";"
-                        ,(cdr b) " = tmp;" )))
-             bindings)
-          ,body
-          )
-    "}"
-    "finally {"
-    (code
-     ,@(mapcar (lambda (b)
-                 (let ((s (ls-compile `(quote ,(car b)))))
-                   `(code ,s ".value" " = " ,(cdr b) ";" )))
-               bindings))
-    "}" ))
+  `(progn
+     (try (var tmp)
+          ,@(with-collect
+             (dolist (b bindings)
+               (let ((s (ls-compile `',(car b))))
+                 (collect `(= tmp (get ,s "value")))
+                 (collect `(= (get ,s "value") ,(cdr b)))
+                 (collect `(= ,(cdr b) tmp)))))
+          ,body)
+     (finally
+      ,@(with-collect
+         (dolist (b bindings)
+           (let ((s (ls-compile `(quote ,(car b)))))
+             (collect `(= (get ,s "value") ,(cdr b)))))))))
 
 (define-compilation let (bindings &rest body)
   (let* ((bindings (mapcar #'ensure-list bindings))
@@ -701,20 +685,16 @@
          (cvalues (mapcar #'ls-compile (mapcar #'second bindings)))
          (*environment* (extend-local-env (remove-if #'special-variable-p variables)))
          (dynamic-bindings))
-    `(code "(function("
-           ,@(interleave
-              (mapcar (lambda (x)
-                        (if (special-variable-p x)
-                            (let ((v (gvarname x)))
-                              (push (cons x v) dynamic-bindings)
-                              v)
-                            (translate-variable x)))
-                      variables)
-              ",")
-           "){"
-           ,(let ((body (ls-compile-block body t t)))
-             `(code ,(let-binding-wrapper dynamic-bindings body)))
-           "})(" ,@(interleave cvalues ",") ")")))
+    `(call (function ,(mapcar (lambda (x)
+                                (if (special-variable-p x)
+                                    (let ((v (gvarname x)))
+                                      (push (cons x (make-symbol v)) dynamic-bindings)
+                                      (make-symbol v))
+                                    (make-symbol (translate-variable x))))
+                              variables)
+                     ,(let ((body (ls-compile-block body t t)))
+                           `,(let-binding-wrapper dynamic-bindings body)))
+           ,@cvalues)))
 
 
 ;;; Return the code to initialize BINDING, and push it extending the
@@ -804,14 +784,15 @@
     ;; unique identifier of the block as exception. We can't use the
     ;; variable name itself, because it could not to be unique, so we
     ;; capture it in a closure.
-    (js!selfcall
-      (when multiple-value-p `(code "var values = mv;" ))
-      "throw ({"
-      "type: 'block', "
-      "id: " (binding-value b) ", "
-      "values: " (ls-compile value multiple-value-p) ", "
-      "message: 'Return from unknown block " (symbol-name name) ".'"
-      "})")))
+    (js!selfcall*
+      (when multiple-value-p
+        `(var (|values| |mv|)))
+      `(throw
+           (object
+            "type" "block"
+            "id" ,(make-symbol (binding-value b))
+            "values" ,(ls-compile value multiple-value-p)
+            "message" ,(concat "Return from unknown block '" (symbol-name name) "'."))))))
 
 (define-compilation catch (id &rest body)
   (js!selfcall*
@@ -819,15 +800,15 @@
     `(try
       ,(ls-compile-block body t))
     `(catch (|cf|)
-       (if (and (== (get |cf| |type|) "catch")
-                (== (get |cf| |id|) |id|))
+       (if (and (== (get |cf| "type") "catch")
+                (== (get |cf| "id") |id|))
            ,(if *multiple-value-p*
-                `(return (call (get |values| |apply|)
+                `(return (call (get |values| "apply")
                                this
-                               (call |forcemv| (get |cf| |values|))))
-                `(return (call (get |pv| |apply|)
+                               (call |forcemv| (get |cf| "values"))))
+                `(return (call (get |pv| "apply")
                                this
-                               (call |forcemv| (get |cf| |values|)))))
+                               (call |forcemv| (get |cf| "values")))))
            (throw |cf|)))))
 
 (define-compilation throw (id value)
@@ -846,7 +827,7 @@
   (let* ((go-tag-counter 0)
          (bindings
           (mapcar (lambda (label)
-                    (let ((tagidx (integer-to-string (incf go-tag-counter))))
+                    (let ((tagidx (incf go-tag-counter)))
                       (make-binding :name label :type 'gotag :value (list tbidx tagidx))))
                   (remove-if-not #'go-tag-p body))))
     (extend-lexenv bindings *environment* 'gotag)))
@@ -867,34 +848,28 @@
           initag)
       (let ((b (lookup-in-lexenv (first body) *environment* 'gotag)))
         (setq initag (second (binding-value b))))
-      (js!selfcall
+      (js!selfcall*
         ;; TAGBODY branch to take
-        "var " branch " = " initag ";"
-        "var " tbidx " = [];"
-        "tbloop:"
-        "while (true) {"
-        `(code "try {"
-               ,(let ((content nil))
-                  `(code "switch(" ,branch "){"
-                        "case " ,initag ":"
-                        ,@(dolist (form (cdr body) (reverse content))
-                          (push (if (not (go-tag-p form))
-                                    `(code ,(ls-compile form) ";" )
+        `(var (,(make-symbol branch) ,initag))
+        `(var (,(make-symbol tbidx) #()))
+        `(label tbloop
+                (while true
+                  (try
+                   (switch ,(make-symbol branch)
+                           ,@(with-collect
+                              (dolist (form (cdr body))
+                                (if (go-tag-p form)
                                     (let ((b (lookup-in-lexenv form *environment* 'gotag)))
-                                      `(code "case " ,(second (binding-value b)) ":" )))
-                                content))
-                           "default:"
-                           "    break tbloop;"
-                           "}" ))
-               "}"
-               "catch (jump) {"
-               "    if (jump.type == 'tagbody' && jump.id == " ,tbidx ")"
-               "        " ,branch " = jump.label;"
-               "    else"
-               "        throw(jump);"
-               "}" )
-        "}"
-        "return " (ls-compile nil) ";" ))))
+                                      (collect `(case ,(second (binding-value b)))))
+                                    (collect (ls-compile form)))))
+                           default
+                           (break tbloop)))
+                  (catch (jump)
+                    (if (and (== (get jump "type") "tagbody")
+                             (== (get jump "id") ,(make-symbol tbidx)))
+                        (= ,(make-symbol branch) (get jump "label"))
+                        (throw jump)))))
+        `(return ,(ls-compile nil))))))
 
 (define-compilation go (label)
   (let ((b (lookup-in-lexenv label *environment* 'gotag))
@@ -903,13 +878,13 @@
              ((integerp label) (integer-to-string label)))))
     (when (null b)
       (error "Unknown tag `~S'" label))
-    (js!selfcall
-      "throw ({"
-      "type: 'tagbody', "
-      "id: " (first (binding-value b)) ", "
-      "label: " (second (binding-value b)) ", "
-      "message: 'Attempt to GO to non-existing tag " n "'"
-      "})" )))
+    (js!selfcall*
+      `(throw
+           (object
+            "type" "tagbody"
+            "id" ,(make-symbol (first (binding-value b)))
+            "label" ,(second (binding-value b))
+            "message" ,(concat "Attempt to GO to non-existing tag " n))))))
 
 (define-compilation unwind-protect (form &rest clean-up)
   (js!selfcall*
@@ -1174,9 +1149,11 @@
 
 (define-builtin characterp (x)
   (js!bool
-   (js!selfcall
-     "var x = " x ";"
-     "return (typeof(" x ") == \"string\") && (x.length == 1 || x.length == 2);")))
+   (js!selfcall*
+     `(var (x ,x))
+     `(return (and (== (typeof x) "string")
+                   (or (== (get x "length") 1)
+                       (== (get x "length") 2)))))))
 
 (define-builtin char-upcase (x)
   `(call |safe_char_upcase| ,x))
@@ -1193,15 +1170,14 @@
                    (== (get x "stringp") 1))))))
 
 (define-raw-builtin funcall (func &rest args)
-  (js!selfcall
-    "var f = " (ls-compile func) ";"
-    "return (typeof f === 'function'? f: f.fvalue)("
-    `(code
-     ,@(interleave (list* (if *multiple-value-p* "values" "pv")
-                          (integer-to-string (length args))
-                          (mapcar #'ls-compile args))
-                   ", "))
-    ")"))
+  (js!selfcall*
+    `(var (f ,(ls-compile func)))
+    `(return (call (if (=== (typeof f) "function")
+                       f
+                       (get f "fvalue"))
+                   ,@(list* (if *multiple-value-p* '|values| '|pv|)
+                            (length args)
+                            (mapcar #'ls-compile args))))))
 
 (define-raw-builtin apply (func &rest args)
   (if (null args)
@@ -1267,7 +1243,7 @@
 
 (define-builtin storage-vector-ref (vector n)
   (js!selfcall*
-    `(var (x (get ,vector ,n)))
+    `(var (x (property ,vector ,n)))
     `(if (=== x undefined) (throw "Out of range."))
     `(return x)))
 
@@ -1292,14 +1268,13 @@
 
 (define-builtin values-array (array)
   (if *multiple-value-p*
-      `(code "values.apply(this, " ,array ")")
-      `(code "pv.apply(this, " ,array ")")))
+      `(call (get |values| "apply") this ,array)
+      `(call (get |pv| "apply") this ,array)))
 
 (define-raw-builtin values (&rest args)
   (if *multiple-value-p*
-      `(code "values(" ,@(interleave (mapcar #'ls-compile args) ",") ")")
-      `(code "pv(" ,@(interleave (mapcar #'ls-compile args) ", ") ")")))
-
+      `(call |values| ,@(mapcar #'ls-compile args))
+      `(call |pv| ,@(mapcar #'ls-compile args))))
 
 ;;; Javascript FFI
 
@@ -1309,11 +1284,11 @@
 (define-raw-builtin oget* (object key &rest keys)
   (js!selfcall*
     `(progn
-       (var (tmp (get ,(ls-compile object) (call |xstring| ,(ls-compile key)))))
+       (var (tmp (property ,(ls-compile object) (call |xstring| ,(ls-compile key)))))
        ,@(mapcar (lambda (key)
                    `(progn
                       (if (=== tmp undefined) (return ,(ls-compile nil)))
-                      (= tmp (get tmp (call |xstring| ,(ls-compile key))))))
+                      (= tmp (property tmp (call |xstring| ,(ls-compile key))))))
                  keys))
     `(return (if (=== tmp undefined) ,(ls-compile nil) tmp))))
 
@@ -1324,12 +1299,12 @@
          (var (obj ,(ls-compile object)))
          ,@(mapcar (lambda (key)
                      `(progn
-                        (= obj (get obj (call |xstring| ,(ls-compile key))))
+                        (= obj (property obj (call |xstring| ,(ls-compile key))))
                         (if (=== object undefined)
                             (throw "Impossible to set object property."))))
                    (butlast keys))
          (var (tmp
-               (= (get obj (call |xstring| ,(ls-compile (car (last keys)))))
+               (= (property obj (call |xstring| ,(ls-compile (car (last keys)))))
                   ,(ls-compile value))))
          (return (if (=== tmp undefined)
                      ,(ls-compile nil)
@@ -1361,10 +1336,10 @@
     `(return ,(ls-compile nil))))
 
 (define-compilation %js-vref (var)
-  `(code "js_to_lisp(" ,var ")"))
+  `(call |js_to_lisp| ,(make-symbol var)))
 
 (define-compilation %js-vset (var val)
-  `(code "(" ,var " = lisp_to_js(" ,(ls-compile val) "))"))
+  `(= ,(make-symbol var) (call |lisp_to_js| ,(ls-compile val))))
 
 (define-setf-expander %js-vref (var)
   (let ((new-value (gensym)))