add support for es7 object/spread and move acorn-6to5 tests to a separate file

README.md

@@ -1,3 +1,8 @@
 # acorn-6to5
 
-Based on [acorn-jsx](https://github.com/RReverser/acorn-jsx).
+Deviates from [acorn](https://github.com/marijnh/acorn) in the following ways:
+
+ * JSX support via [acorn-jsx](https://github.com/RReverser/acorn-jsx)
+ * [ES7 Abstract references](https://github.com/zenparsing/es-abstract-refs)
+ * [ES7 Async/await](https://github.com/lukehoban/ecmascript-asyncawait)
+ * [ES7 Object Rest/Spread](https://github.com/sebmarkbage/ecmascript-rest-spread)

acorn.js

@@ -1757,7 +1757,7 @@
           node.type = "ObjectPattern";
           for (var i = 0; i < node.properties.length; i++) {
             var prop = node.properties[i];
-            if (prop.kind !== "init") unexpected(prop.key.start);
+            if (prop.type === "Property" && prop.kind !== "init") unexpected(prop.key.start);
             toAssignable(prop.value, false, checkType);
           }
           break;
@@ -1865,8 +1865,11 @@
         if (!isBinding) break;
 
       case "ObjectPattern":
-        for (var i = 0; i < expr.properties.length; i++)
-          checkLVal(expr.properties[i].value, isBinding);
+        for (var i = 0; i < expr.properties.length; i++) {
+          var prop = expr.properties[i];
+          if (prop.type === "Property") prop = prop.value;
+          checkLVal(prop, isBinding);
+        }
         break;
 
       case "ArrayPattern":
@@ -1876,6 +1879,7 @@
         }
         break;
 
+      case "SpreadProperty":
       case "SpreadElement":
       case "VirtualPropertyExpression":
         break;
@@ -2644,6 +2648,13 @@
         prop.shorthand = false;
         isGenerator = eat(_star);
       }
+      if (options.ecmaVersion >= 7 && tokType === _ellipsis) {
+        if (isAsync || isGenerator) unexpected();
+        prop = parseMaybeUnary();
+        prop.type = "SpreadProperty";
+        node.properties.push(prop);
+        continue;
+      }
       parsePropertyName(prop);
       if (eat(_colon)) {
         prop.value = parseExpression(true);

package.json

@@ -2,7 +2,7 @@
   "name": "acorn-6to5",
   "description": "Acorn fork used by 6to5",
   "main": "acorn.js",
-  "version": "0.9.1-4",
+  "version": "0.9.1-5",
   "maintainers": [
     {
       "name": "Marijn Haverbeke",

test/run.js

@@ -6,6 +6,7 @@
     require("./tests.js");
     require("./tests-harmony.js");
     require("./tests-jsx.js");
+    require("./tests-6to5.js");
   } else {
     driver = window;
   }