remove some dead code

src/babel/transformation/transformer.js

@@ -65,10 +65,6 @@ export default class Transformer {
   }
 
   buildPass(file: File): TransformerPass {
-    if (!(file instanceof File)) {
-      throw new Error("Multiple versions of babel are interacting, this is either due to a version mismatch in a plugin or it was resolved incorrectly");
-    }
-
     return new TransformerPass(file, this);
   }
 }

src/babel/traversal/path/index.js

@@ -1,3 +1,4 @@
+import PathHoister from "./hoister";
 import isBoolean from "lodash/lang/isBoolean";
 import isNumber from "lodash/lang/isNumber";
 import isRegExp from "lodash/lang/isRegExp";
@@ -10,7 +11,7 @@ import Scope from "../scope";
 import * as t from "../../types";
 
 var hoistVariablesVisitor = {
-  enter(node, parent, scope ) {
+  enter(node, parent, scope) {
     if (this.isFunction()) {
       return this.skip();
     }
@@ -100,7 +101,7 @@ export default class TraversalPath {
       if (this.node) nodes.push(this.node);
       this.replaceExpressionWithStatements(nodes);
     } else {
-      throw new Error("no idea what to do with this");
+      throw new Error("no idea what to do with this ");
     }
   }
 
@@ -258,10 +259,16 @@ export default class TraversalPath {
   }
 
   _verifyNodeList(nodes) {
+    if (typeof nodes === "object") {
+      nodes = [nodes];
+    }
+
     for (var i = 0; i < nodes.length; i++) {
       var node = nodes[i];
       if (!node) throw new Error(`Node list has falsy node with the index of ${i}`);
     }
+
+    return nodes;
   }
 
   replaceWithMultiple(nodes: Array<Object>) {
@@ -601,10 +608,6 @@ export default class TraversalPath {
     return t.isVar(this.node);
   }
 
-  isScope(): boolean {
-    return t.isScope(this.node, this.parent);
-  }
-
   isPreviousType(type: string): boolean {
     return t.isType(this.type, type);
   }
@@ -633,8 +636,9 @@ export default class TraversalPath {
     return t.getBindingIdentifiers(this.node);
   }
 
-  traverse(opts, state) {
-    traverse(this.node, opts, this.scope, state, this);
+  traverse(visitor, state) {
+    traverse(this.node, visitor, this.scope, state, this);
+  }
 
   /**
    * Description

src/babel/traversal/scope.js

@@ -57,7 +57,7 @@ var blockVariableVisitor = {
   enter(node, parent, scope, state) {
     if (this.isFunctionDeclaration() || this.isBlockScoped()) {
       state.registerDeclaration(this);
-    } else if (t.isScope(node, parent)) {
+    } else if (this.isScope()) {
       this.skip();
     }
   }
@@ -71,11 +71,8 @@ export default class Scope {
    */
 
   constructor(path: TraversalPath, parent?: Scope, file?: File) {
-    var cached = path.getData("scope");
-    if (cached) {
-      return cached;
-    } else {
-      //path.setData("scope", this);
+    if (parent && parent.block === path.node) {
+      return parent;
     }
 
     this.parent = parent;
@@ -252,7 +249,7 @@ export default class Scope {
           for (var name in ids) {
             if (name === oldName) ids[name].name = newName;
           }
-        } else if (t.isScope(node, parent)) {
+        } else if (this.isScope()) {
           if (!scope.bindingIdentifierEquals(oldName, binding)) {
             this.skip();
           }
@@ -266,6 +263,18 @@ export default class Scope {
     binding.name = newName;
   }
 
+  /**
+   * Description
+   */
+
+  dump() {
+    var scope = this;
+    do {
+      console.log(scope.block.type, "Bindings:", Object.keys(scope.bindings));
+    } while(scope = scope.parent);
+    console.log("-------------");
+  }
+
   /**
    * Description
    */