6.0.0

I'm extremely stupid and didn't commit as I go. To anyone reading this
I'm extremely sorry. A lot of these changes are very broad and I plan on
releasing Babel 6.0.0 today live on stage at Ember Camp London so I'm
afraid I couldn't wait. If you're ever in London I'll buy you a beer
(or assorted beverage!) to make up for it, also I'll kiss your feet and
give you a back massage, maybe.

packages/babel-plugin-transform-function-bind/src/index.js

@@ -1,7 +1,51 @@
-export default function () {
+export default function ({ types: t }) {
+  function getTempId(scope) {
+    let id = scope.path.getData("functionBind");
+    if (id) return id;
+
+    id = scope.generateDeclaredUidIdentifier("context");
+    return scope.path.setData("functionBind", id);
+  }
+
+  function getStaticContext(bind, scope) {
+    let object = bind.object || bind.callee.object;
+    return scope.isStatic(object) && object;
+  }
+
+  function inferBindContext(bind, scope) {
+    let staticContext = getStaticContext(bind, scope);
+    if (staticContext) return staticContext;
+
+    let tempId = getTempId(scope);
+    if (bind.object) {
+      bind.callee = t.sequenceExpression([
+        t.assignmentExpression("=", tempId, bind.object),
+        bind.callee
+      ]);
+    } else {
+      bind.callee.object = t.assignmentExpression("=", tempId, bind.callee.object);
+    }
+    return tempId;
+  }
+
   return {
+    inherits: require("babel-plugin-syntax-function-bind"),
+
     visitor: {
-      // your visitor methods go here
+      CallExpression({ node, scope }) {
+        let bind = node.callee;
+        if (!t.isBindExpression(bind)) return;
+
+        let context = inferBindContext(bind, scope);
+        node.callee = t.memberExpression(bind.callee, t.identifier("call"));
+        node.arguments.unshift(context);
+      },
+
+      BindExpression(path) {
+        let { node, scope } = path;
+        let context = inferBindContext(node, scope);
+        path.replaceWith(t.callExpression(t.memberExpression(node.callee, t.identifier("bind")), [context]));
+      }
     }
   };
 }