support foo.* for ptr deref

See #770

src/ast_render.cpp

@@ -222,6 +222,8 @@ static const char *node_type_str(NodeType node_type) {
             return "AsmExpr";
         case NodeTypeFieldAccessExpr:
             return "FieldAccessExpr";
+        case NodeTypePtrDeref:
+            return "PtrDerefExpr";
         case NodeTypeContainerDecl:
             return "ContainerDecl";
         case NodeTypeStructField:
@@ -696,6 +698,13 @@ static void render_node_extra(AstRender *ar, AstNode *node, bool grouped) {
                 print_symbol(ar, rhs);
                 break;
             }
+        case NodeTypePtrDeref:
+            {
+                AstNode *lhs = node->data.ptr_deref_expr.target;
+                render_node_ungrouped(ar, lhs);
+                fprintf(ar->f, ".*");
+                break;
+            }
         case NodeTypeUndefinedLiteral:
             fprintf(ar->f, "undefined");
             break;