property gets and puts implemented, yays

* module/language/ecmascript/compile-ghil.scm (@impl): Ok, don't recurse
  on args here.
  (comp): Implement property gets and puts and lexical assignment.
  (comp-body): Fix scanning of var forms.

* module/language/ecmascript/impl.scm (prop-attrs): Allow for the prop
  attr array to be #f.

* module/language/ecmascript/parse.scm (parse-ecmascript): Fix assignment
  parsing.

module/language/ecmascript/compile-ghil.scm

@@ -43,7 +43,7 @@
                    (make-ghil-ref
                     ,e ,l
                     (ghil-var-at-module! ,e '(language ecmascript impl) ',sym #t))
-                   (map (lambda (x) (comp x ,e)) ,args)))
+                   ,args))
 
 (define (comp x e)
   (let ((l (location x)))
@@ -84,7 +84,13 @@
       ((return ,expr)
        (make-ghil-inline e l 'return (list (comp expr e))))
       ((array . ,args)
-       (@impl e l new-array args))
+       (@impl e l new-array (map (lambda (x) (comp x e)) args)))
+      ((pref ,obj ,prop)
+       (@impl e l pget (list (comp obj e) (make-ghil-quote e l prop))))
+      ((= (ref ,name) ,val)
+       (make-ghil-set e l (ghil-var-for-set! e name) (comp val e)))
+      ((= (pref ,obj ,prop) ,val)
+       (@impl e l pput (list (comp obj e) (make-ghil-quote e l prop) (comp val e))))
       (else
        (error "compilation not yet implemented:" x)))))
 
@@ -92,14 +98,16 @@
   (define (process)
     (let lp ((in body) (out '()) (rvars (reverse formals)))
       (pmatch in
-        (((var ,x) . ,rest)
-         (lp rest
+        (((var (,x) . ,morevars) . ,rest)
+         (lp `((var . ,morevars) . ,rest)
              out
              (if (memq x rvars) rvars (cons x rvars))))
-        (((var ,x ,y) . ,rest)
-         (lp rest
+        (((var (,x ,y) . ,morevars) . ,rest)
+         (lp `((var . ,morevars) . ,rest)
              `((= (ref ,x) ,y) . ,out)
              (if (memq x rvars) rvars (cons x rvars))))
+        (((var) . ,rest)
+         (lp rest out rvars))
         ((,x . ,rest) (guard (and (pair? x) (eq? (car x) 'lambda)))
          (lp rest
              (cons x out)

module/language/ecmascript/impl.scm

@@ -55,7 +55,8 @@
               *undefined*)))))
 
 (define-method (prop-attrs (o <js-object>) p)
-  (or (hashq-ref (js-prop-attrs o) p)
+  (or (let ((attrs (js-prop-attrs o)))
+        (and attrs (hashq-ref (js-prop-attrs o) p)))
       (let ((proto (js-prototype o)))
         (if proto
             (prop-attrs proto p)

module/language/ecmascript/parse.scm

@@ -102,8 +102,8 @@
                         (Identifier Initialiser) -> `(,$1 ,$2))
    (VariableDeclarationNoIn (Identifier) -> `(,$1)
                             (Identifier Initialiser) -> `(,$1 ,$2))
-   (Initialiser (= AssignmentExpression) -> $1)
-   (InitialiserNoIn (= AssignmentExpressionNoIn) -> $1)
+   (Initialiser (= AssignmentExpression) -> $2)
+   (InitialiserNoIn (= AssignmentExpressionNoIn) -> $2)
 
    (EmptyStatement (semicolon) -> '(begin))