Use comment instead of docstring to make bootstrapping easier

[jscl.git] / lispstrack.lisp

diff --git a/lispstrack.lisp b/lispstrack.lisp
index 99a7473..d531561 100644 (file)
--- a/lispstrack.lisp
+++ b/lispstrack.lisp
@@ -1,5 +1,10 @@
 ;;; Utils
 
+(defmacro while (condition &body body)
+  `(do ()
+       ((not ,condition))
+     ,@body))
+
 ;;; simplify me, please
 (defun concat (&rest strs)
   (reduce (lambda (s1 s2) (concatenate 'string s1 s2))
@@ -11,10 +16,34 @@
   (defun make-binding (symbol)
     (cons symbol (format nil "V_~d" (incf counter)))))
 
+;;; Concatenate a list of strings, with a separator
+(defun join (list separator)
+  (cond
+    ((null list)
+     "")
+    ((null (cdr list))
+     (car list))
+    (t
+     (concat (car list)
+             separator
+             (join (cdr list) separator)))))
+
 ;;; Compiler
 
 (defvar *compilations* nil)
 
+(defun ls-compile-sexps (sexps env)
+  (concat (join (mapcar (lambda (x)
+                          (concat (ls-compile x env) ";"))
+                        sexps)
+                ";
+")))
+
+(defun ls-compile-block (sexps env)
+  (concat (ls-compile-sexps (butlast sexps) env)
+          "return " (ls-compile (car (last sexps)) env) ";"))
+
+
 (defun extend-env (args env)
   (append (mapcar #'make-binding args) env))
 
@@ -25,8 +54,9 @@
        (error "Undefined variable `~a'"  symbol))))
 
 (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"
+  ;; 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 ,@args) ,@body))
          *compilations*))
 
@@ -39,17 +69,59 @@ body can access to the local environment through the variable env"
 (define-compilation lambda (args &rest body)
   (let ((new-env (extend-env args env)))
     (concat "(function ("
-           (format nil "~{~a~^, ~}" (mapcar
-                                     (lambda (x) (ls-lookup x new-env))
-                                     args))
-           "){ "
+           (join (mapcar (lambda (x) (ls-lookup x new-env))
+                          args)
+                  ",")
+           "){
+"
            (ls-compile-block body new-env)
-           "})
-")))
+           "
+})")))
 
 (define-compilation setq (var val)
   (format nil "~a = ~a" (ls-lookup var env) (ls-compile val env)))
 
+(defun lisp->js (sexp)
+  (cond
+    ((integerp sexp) (format nil "~a" sexp))
+    ((stringp sexp) (format nil "\"~a\"" sexp))
+    ((listp sexp)   (concat "[" (join (mapcar 'lisp->js sexp) ",") "]"))))
+
+(define-compilation quote (sexp)
+  (lisp->js sexp))
+
+(define-compilation debug (form)
+  (format nil "console.log(~a)" (ls-compile form env)))
+
+(define-compilation while (pred &rest body)
+  (format nil "(function(){while(~a){~a}})() "
+         (ls-compile pred env)
+         (ls-compile-sexps body env)))
+
+(defmacro eval-when-compile (&body body)
+  `(eval-when (:compile-toplevel :execute)
+     ,@body))
+
+(define-compilation eval-when-compile (when &rest body)
+  (eval body))
+
+;;; aritmetic primitives
+(define-compilation + (x y)
+  (concat "((" (ls-compile x env) ") + (" (ls-compile y env) "))"))
+
+(define-compilation - (x y)
+  (concat "((" (ls-compile x env) ") - (" (ls-compile y env) "))"))
+
+(define-compilation * (x y)
+  (concat "((" (ls-compile x env) ") * (" (ls-compile y env) "))"))
+
+(define-compilation / (x y)
+  (concat "((" (ls-compile x env) ") / (" (ls-compile y env) "))"))
+
+(define-compilation = (x y)
+  (concat "((" (ls-compile x env) ") == (" (ls-compile y env) "))"))
+
+
 (defparameter *env* '())
 (defparameter *env-fun* '())
 
@@ -58,17 +130,20 @@ body can access to the local environment through the variable env"
     ((symbolp sexp) (ls-lookup sexp env))
     ((integerp sexp) (format nil "~a" sexp))
     ((stringp sexp) (format nil " \"~a\" " sexp))
-                                       ; list
     ((listp sexp)
      (let ((compiler-func (second (assoc (car sexp) *compilations*))))
        (if compiler-func
            (apply compiler-func env (cdr sexp))
+          (funcall (ls-compile (car sexp) env)  )
            ;; funcall
            )))))
 
-(defun ls-compile-block (sexps env)
-  (format nil
-    "~{~#[~; return ~a;~:;~a;~%~]~}"
-    (mapcar #'(lambda (x)
-                     (ls-compile x env))
-                 sexps)))
+
+;;; Testing
+
+(defun compile-test ()
+  (with-open-file (in "test.lisp")
+    (with-open-file (out "test.js" :direction :output :if-exists :supersede)
+      (loop
+         for x = (read in nil) while x
+         do (write-string (concat (ls-compile x) "; ") out)))))