Conses are working

[jscl.git] / lispstrack.lisp

diff --git a/lispstrack.lisp b/lispstrack.lisp
index 705c089..d3771fe 100644 (file)
--- a/lispstrack.lisp
+++ b/lispstrack.lisp
@@ -77,18 +77,36 @@
           (ls-compile true env fenv)
           (ls-compile false env fenv)))
 
-(define-compilation lambda (args &rest body)
-  (let ((new-env (extend-env args env)))
-    (concat "(function ("
-           (join (mapcar (lambda (x) (lookup-variable x new-env))
-                          args)
-                  ",")
-           "){
+;;; Return the required args of a lambda list
+(defun lambda-list-required-argument (lambda-list)
+  (if (or (null lambda-list) (eq (car lambda-list) '&rest))
+      nil
+      (cons (car lambda-list) (lambda-list-required-argument (cdr lambda-list)))))
+
+(defun lambda-list-rest-argument (lambda-list)
+  (second (member '&rest lambda-list)))
+
+(define-compilation lambda (lambda-list &rest body)
+  (let ((required-arguments (lambda-list-required-argument lambda-list))
+        (rest-argument (lambda-list-rest-argument lambda-list)))
+    (let ((new-env (extend-env (cons rest-argument required-arguments) env)))
+      (concat "(function ("
+              (join (mapcar (lambda (x) (lookup-variable x new-env))
+                            required-arguments)
+                    ",")
+              "){
 "
-            (concat (ls-compile-block (butlast body) env fenv)
-                    "return " (ls-compile (car (last body)) env fenv) ";")
-           "
-})")))
+              (if rest-argument
+                  (concat "var " (lookup-variable rest-argument new-env)
+                          " = arguments.slice("
+                          (prin1-to-string (length required-arguments)) ");
+")
+                  "")
+
+              (concat (ls-compile-block (butlast body) new-env fenv)
+                      "return " (ls-compile (car (last body)) new-env fenv) ";")
+              "
+})"))))
 
 (define-compilation fsetq (var val)
   (format nil "~a = ~a" (lookup-function var fenv) (ls-compile val env fenv)))
@@ -96,14 +114,29 @@
 (define-compilation setq (var val)
   (format nil "~a = ~a" (lookup-variable var env) (ls-compile val env fenv)))
 
-(defun lisp->js (sexp)
+
+;;; Literals
+
+(defvar *literals* '())
+
+(defun literal->js (sexp)
   (cond
+    ((null sexp) "undefined")
     ((integerp sexp) (format nil "~a" sexp))
     ((stringp sexp) (format nil "\"~a\"" sexp))
-    ((listp sexp)   (concat "[" (join (mapcar 'lisp->js sexp) ",") "]"))))
+    ((consp sexp) (concat "{car: "
+                          (literal->js (car sexp))
+                          ", cdr: "
+                         (literal->js (cdr sexp)) "}"))))
+
+(let ((counter 0))
+  (defun literal (form)
+    (let ((var (format nil "l~d" (incf counter))))
+      (push (cons var (literal->js form)) *literals*)
+      var)))
 
 (define-compilation quote (sexp)
-  (lisp->js sexp))
+  (literal sexp))
 
 (define-compilation debug (form)
   (format nil "console.log(~a)" (ls-compile form env fenv)))
@@ -141,6 +174,14 @@
 (define-compilation = (x y)
   (concat "((" (ls-compile x env fenv) ") == (" (ls-compile y env fenv) "))"))
 
+(define-compilation cons (x y)
+  (concat "{car: " (ls-compile x env fenv) ", cdr: " (ls-compile y env fenv) "}"))
+
+(define-compilation car (x)
+  (concat "(" (ls-compile x env fenv) ").car"))
+
+(define-compilation cdr (x)
+  (concat "(" (ls-compile x env fenv) ").cdr"))
 
 (defmacro with-eval-when-compilation (&body body)
   `(setq *eval-when-compilations*
@@ -182,13 +223,25 @@
              (apply compiler-func env fenv (cdr sexp))
              (compile-funcall (car sexp) (cdr sexp) env fenv)))))))
 
+(defun ls-compile-toplevel (sexp)
+  (setq *literals* nil)
+  (let ((code (ls-compile sexp)))
+    (prog1
+        (concat (join (mapcar (lambda (lit)
+                                (concat "var " (car lit) " = " (cdr lit) ";
+"))
+                              *literals*)
+                      "")
+                code)
+      (setq *literals* nil))))
+
 
 (defun ls-compile-file (filename output)
   (with-open-file (in filename)
     (with-open-file (out output :direction :output :if-exists :supersede)
       (loop
          for x = (read in nil) while x
-         for compilation = (ls-compile x)
+         for compilation = (ls-compile-toplevel x)
          when compilation do (write-line (concat compilation "; ") out)))))