add some packages

node_modules/babel-traverse/lib/scope/binding.js

@@ -0,0 +1,82 @@
+"use strict";
+
+exports.__esModule = true;
+
+var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");
+
+var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var Binding = function () {
+  function Binding(_ref) {
+    var existing = _ref.existing,
+        identifier = _ref.identifier,
+        scope = _ref.scope,
+        path = _ref.path,
+        kind = _ref.kind;
+    (0, _classCallCheck3.default)(this, Binding);
+
+    this.identifier = identifier;
+    this.scope = scope;
+    this.path = path;
+    this.kind = kind;
+
+    this.constantViolations = [];
+    this.constant = true;
+
+    this.referencePaths = [];
+    this.referenced = false;
+    this.references = 0;
+
+    this.clearValue();
+
+    if (existing) {
+      this.constantViolations = [].concat(existing.path, existing.constantViolations, this.constantViolations);
+    }
+  }
+
+  Binding.prototype.deoptValue = function deoptValue() {
+    this.clearValue();
+    this.hasDeoptedValue = true;
+  };
+
+  Binding.prototype.setValue = function setValue(value) {
+    if (this.hasDeoptedValue) return;
+    this.hasValue = true;
+    this.value = value;
+  };
+
+  Binding.prototype.clearValue = function clearValue() {
+    this.hasDeoptedValue = false;
+    this.hasValue = false;
+    this.value = null;
+  };
+
+  Binding.prototype.reassign = function reassign(path) {
+    this.constant = false;
+    if (this.constantViolations.indexOf(path) !== -1) {
+      return;
+    }
+    this.constantViolations.push(path);
+  };
+
+  Binding.prototype.reference = function reference(path) {
+    if (this.referencePaths.indexOf(path) !== -1) {
+      return;
+    }
+    this.referenced = true;
+    this.references++;
+    this.referencePaths.push(path);
+  };
+
+  Binding.prototype.dereference = function dereference() {
+    this.references--;
+    this.referenced = !!this.references;
+  };
+
+  return Binding;
+}();
+
+exports.default = Binding;
+module.exports = exports["default"];