unboundedpress/node_modules/babel-traverse/lib/scope/index.js

"use strict";

exports.__esModule = true;

var _keys = require("babel-runtime/core-js/object/keys");

var _keys2 = _interopRequireDefault(_keys);

var _create = require("babel-runtime/core-js/object/create");

var _create2 = _interopRequireDefault(_create);

var _map = require("babel-runtime/core-js/map");

var _map2 = _interopRequireDefault(_map);

var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _getIterator2 = require("babel-runtime/core-js/get-iterator");

var _getIterator3 = _interopRequireDefault(_getIterator2);

var _includes = require("lodash/includes");

var _includes2 = _interopRequireDefault(_includes);

var _repeat = require("lodash/repeat");

var _repeat2 = _interopRequireDefault(_repeat);

var _renamer = require("./lib/renamer");

var _renamer2 = _interopRequireDefault(_renamer);

var _index = require("../index");

var _index2 = _interopRequireDefault(_index);

var _defaults = require("lodash/defaults");

var _defaults2 = _interopRequireDefault(_defaults);

var _babelMessages = require("babel-messages");

var messages = _interopRequireWildcard(_babelMessages);

var _binding2 = require("./binding");

var _binding3 = _interopRequireDefault(_binding2);

var _globals = require("globals");

var _globals2 = _interopRequireDefault(_globals);

var _babelTypes = require("babel-types");

var t = _interopRequireWildcard(_babelTypes);

var _cache = require("../cache");

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var _crawlCallsCount = 0;

function getCache(path, parentScope, self) {
  var scopes = _cache.scope.get(path.node) || [];

  for (var _iterator = scopes, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : (0, _getIterator3.default)(_iterator);;) {
    var _ref;

    if (_isArray) {
      if (_i >= _iterator.length) break;
      _ref = _iterator[_i++];
    } else {
      _i = _iterator.next();
      if (_i.done) break;
      _ref = _i.value;
    }

    var scope = _ref;

    if (scope.parent === parentScope && scope.path === path) return scope;
  }

  scopes.push(self);

  if (!_cache.scope.has(path.node)) {
    _cache.scope.set(path.node, scopes);
  }
}

function gatherNodeParts(node, parts) {
  if (t.isModuleDeclaration(node)) {
    if (node.source) {
      gatherNodeParts(node.source, parts);
    } else if (node.specifiers && node.specifiers.length) {
      for (var _iterator2 = node.specifiers, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : (0, _getIterator3.default)(_iterator2);;) {
        var _ref2;

        if (_isArray2) {
          if (_i2 >= _iterator2.length) break;
          _ref2 = _iterator2[_i2++];
        } else {
          _i2 = _iterator2.next();
          if (_i2.done) break;
          _ref2 = _i2.value;
        }

        var specifier = _ref2;

        gatherNodeParts(specifier, parts);
      }
    } else if (node.declaration) {
      gatherNodeParts(node.declaration, parts);
    }
  } else if (t.isModuleSpecifier(node)) {
    gatherNodeParts(node.local, parts);
  } else if (t.isMemberExpression(node)) {
    gatherNodeParts(node.object, parts);
    gatherNodeParts(node.property, parts);
  } else if (t.isIdentifier(node)) {
    parts.push(node.name);
  } else if (t.isLiteral(node)) {
    parts.push(node.value);
  } else if (t.isCallExpression(node)) {
    gatherNodeParts(node.callee, parts);
  } else if (t.isObjectExpression(node) || t.isObjectPattern(node)) {
    for (var _iterator3 = node.properties, _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : (0, _getIterator3.default)(_iterator3);;) {
      var _ref3;

      if (_isArray3) {
        if (_i3 >= _iterator3.length) break;
        _ref3 = _iterator3[_i3++];
      } else {
        _i3 = _iterator3.next();
        if (_i3.done) break;
        _ref3 = _i3.value;
      }

      var prop = _ref3;

      gatherNodeParts(prop.key || prop.argument, parts);
    }
  }
}

var collectorVisitor = {
  For: function For(path) {
    for (var _iterator4 = t.FOR_INIT_KEYS, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : (0, _getIterator3.default)(_iterator4);;) {
      var _ref4;

      if (_isArray4) {
        if (_i4 >= _iterator4.length) break;
        _ref4 = _iterator4[_i4++];
      } else {
        _i4 = _iterator4.next();
        if (_i4.done) break;
        _ref4 = _i4.value;
      }

      var key = _ref4;

      var declar = path.get(key);
      if (declar.isVar()) path.scope.getFunctionParent().registerBinding("var", declar);
    }
  },
  Declaration: function Declaration(path) {
    if (path.isBlockScoped()) return;

    if (path.isExportDeclaration() && path.get("declaration").isDeclaration()) return;

    path.scope.getFunctionParent().registerDeclaration(path);
  },
  ReferencedIdentifier: function ReferencedIdentifier(path, state) {
    state.references.push(path);
  },
  ForXStatement: function ForXStatement(path, state) {
    var left = path.get("left");
    if (left.isPattern() || left.isIdentifier()) {
      state.constantViolations.push(left);
    }
  },


  ExportDeclaration: {
    exit: function exit(path) {
      var node = path.node,
          scope = path.scope;

      var declar = node.declaration;
      if (t.isClassDeclaration(declar) || t.isFunctionDeclaration(declar)) {
        var _id = declar.id;
        if (!_id) return;

        var binding = scope.getBinding(_id.name);
        if (binding) binding.reference(path);
      } else if (t.isVariableDeclaration(declar)) {
        for (var _iterator5 = declar.declarations, _isArray5 = Array.isArray(_iterator5), _i5 = 0, _iterator5 = _isArray5 ? _iterator5 : (0, _getIterator3.default)(_iterator5);;) {
          var _ref5;

          if (_isArray5) {
            if (_i5 >= _iterator5.length) break;
            _ref5 = _iterator5[_i5++];
          } else {
            _i5 = _iterator5.next();
            if (_i5.done) break;
            _ref5 = _i5.value;
          }

          var decl = _ref5;

          var ids = t.getBindingIdentifiers(decl);
          for (var name in ids) {
            var _binding = scope.getBinding(name);
            if (_binding) _binding.reference(path);
          }
        }
      }
    }
  },

  LabeledStatement: function LabeledStatement(path) {
    path.scope.getProgramParent().addGlobal(path.node);
    path.scope.getBlockParent().registerDeclaration(path);
  },
  AssignmentExpression: function AssignmentExpression(path, state) {
    state.assignments.push(path);
  },
  UpdateExpression: function UpdateExpression(path, state) {
    state.constantViolations.push(path.get("argument"));
  },
  UnaryExpression: function UnaryExpression(path, state) {
    if (path.node.operator === "delete") {
      state.constantViolations.push(path.get("argument"));
    }
  },
  BlockScoped: function BlockScoped(path) {
    var scope = path.scope;
    if (scope.path === path) scope = scope.parent;
    scope.getBlockParent().registerDeclaration(path);
  },
  ClassDeclaration: function ClassDeclaration(path) {
    var id = path.node.id;
    if (!id) return;

    var name = id.name;
    path.scope.bindings[name] = path.scope.getBinding(name);
  },
  Block: function Block(path) {
    var paths = path.get("body");
    for (var _iterator6 = paths, _isArray6 = Array.isArray(_iterator6), _i6 = 0, _iterator6 = _isArray6 ? _iterator6 : (0, _getIterator3.default)(_iterator6);;) {
      var _ref6;

      if (_isArray6) {
        if (_i6 >= _iterator6.length) break;
        _ref6 = _iterator6[_i6++];
      } else {
        _i6 = _iterator6.next();
        if (_i6.done) break;
        _ref6 = _i6.value;
      }

      var bodyPath = _ref6;

      if (bodyPath.isFunctionDeclaration()) {
        path.scope.getBlockParent().registerDeclaration(bodyPath);
      }
    }
  }
};

var uid = 0;

var Scope = function () {
  function Scope(path, parentScope) {
    (0, _classCallCheck3.default)(this, Scope);

    if (parentScope && parentScope.block === path.node) {
      return parentScope;
    }

    var cached = getCache(path, parentScope, this);
    if (cached) return cached;

    this.uid = uid++;
    this.parent = parentScope;
    this.hub = path.hub;

    this.parentBlock = path.parent;
    this.block = path.node;
    this.path = path;

    this.labels = new _map2.default();
  }

  Scope.prototype.traverse = function traverse(node, opts, state) {
    (0, _index2.default)(node, opts, this, state, this.path);
  };

  Scope.prototype.generateDeclaredUidIdentifier = function generateDeclaredUidIdentifier() {
    var name = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "temp";

    var id = this.generateUidIdentifier(name);
    this.push({ id: id });
    return id;
  };

  Scope.prototype.generateUidIdentifier = function generateUidIdentifier() {
    var name = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "temp";

    return t.identifier(this.generateUid(name));
  };

  Scope.prototype.generateUid = function generateUid() {
    var name = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "temp";

    name = t.toIdentifier(name).replace(/^_+/, "").replace(/[0-9]+$/g, "");

    var uid = void 0;
    var i = 0;
    do {
      uid = this._generateUid(name, i);
      i++;
    } while (this.hasLabel(uid) || this.hasBinding(uid) || this.hasGlobal(uid) || this.hasReference(uid));

    var program = this.getProgramParent();
    program.references[uid] = true;
    program.uids[uid] = true;

    return uid;
  };

  Scope.prototype._generateUid = function _generateUid(name, i) {
    var id = name;
    if (i > 1) id += i;
    return "_" + id;
  };

  Scope.prototype.generateUidIdentifierBasedOnNode = function generateUidIdentifierBasedOnNode(parent, defaultName) {
    var node = parent;

    if (t.isAssignmentExpression(parent)) {
      node = parent.left;
    } else if (t.isVariableDeclarator(parent)) {
      node = parent.id;
    } else if (t.isObjectProperty(node) || t.isObjectMethod(node)) {
      node = node.key;
    }

    var parts = [];
    gatherNodeParts(node, parts);

    var id = parts.join("$");
    id = id.replace(/^_/, "") || defaultName || "ref";

    return this.generateUidIdentifier(id.slice(0, 20));
  };

  Scope.prototype.isStatic = function isStatic(node) {
    if (t.isThisExpression(node) || t.isSuper(node)) {
      return true;
    }

    if (t.isIdentifier(node)) {
      var binding = this.getBinding(node.name);
      if (binding) {
        return binding.constant;
      } else {
        return this.hasBinding(node.name);
      }
    }

    return false;
  };

  Scope.prototype.maybeGenerateMemoised = function maybeGenerateMemoised(node, dontPush) {
    if (this.isStatic(node)) {
      return null;
    } else {
      var _id2 = this.generateUidIdentifierBasedOnNode(node);
      if (!dontPush) this.push({ id: _id2 });
      return _id2;
    }
  };

  Scope.prototype.checkBlockScopedCollisions = function checkBlockScopedCollisions(local, kind, name, id) {
    if (kind === "param") return;

    if (kind === "hoisted" && local.kind === "let") return;

    var duplicate = kind === "let" || local.kind === "let" || local.kind === "const" || local.kind === "module" || local.kind === "param" && (kind === "let" || kind === "const");

    if (duplicate) {
      throw this.hub.file.buildCodeFrameError(id, messages.get("scopeDuplicateDeclaration", name), TypeError);
    }
  };

  Scope.prototype.rename = function rename(oldName, newName, block) {
    var binding = this.getBinding(oldName);
    if (binding) {
      newName = newName || this.generateUidIdentifier(oldName).name;
      return new _renamer2.default(binding, oldName, newName).rename(block);
    }
  };

  Scope.prototype._renameFromMap = function _renameFromMap(map, oldName, newName, value) {
    if (map[oldName]) {
      map[newName] = value;
      map[oldName] = null;
    }
  };

  Scope.prototype.dump = function dump() {
    var sep = (0, _repeat2.default)("-", 60);
    console.log(sep);
    var scope = this;
    do {
      console.log("#", scope.block.type);
      for (var name in scope.bindings) {
        var binding = scope.bindings[name];
        console.log(" -", name, {
          constant: binding.constant,
          references: binding.references,
          violations: binding.constantViolations.length,
          kind: binding.kind
        });
      }
    } while (scope = scope.parent);
    console.log(sep);
  };

  Scope.prototype.toArray = function toArray(node, i) {
    var file = this.hub.file;

    if (t.isIdentifier(node)) {
      var binding = this.getBinding(node.name);
      if (binding && binding.constant && binding.path.isGenericType("Array")) return node;
    }

    if (t.isArrayExpression(node)) {
      return node;
    }

    if (t.isIdentifier(node, { name: "arguments" })) {
      return t.callExpression(t.memberExpression(t.memberExpression(t.memberExpression(t.identifier("Array"), t.identifier("prototype")), t.identifier("slice")), t.identifier("call")), [node]);
    }

    var helperName = "toArray";
    var args = [node];
    if (i === true) {
      helperName = "toConsumableArray";
    } else if (i) {
      args.push(t.numericLiteral(i));
      helperName = "slicedToArray";
    }
    return t.callExpression(file.addHelper(helperName), args);
  };

  Scope.prototype.hasLabel = function hasLabel(name) {
    return !!this.getLabel(name);
  };

  Scope.prototype.getLabel = function getLabel(name) {
    return this.labels.get(name);
  };

  Scope.prototype.registerLabel = function registerLabel(path) {
    this.labels.set(path.node.label.name, path);
  };

  Scope.prototype.registerDeclaration = function registerDeclaration(path) {
    if (path.isLabeledStatement()) {
      this.registerLabel(path);
    } else if (path.isFunctionDeclaration()) {
      this.registerBinding("hoisted", path.get("id"), path);
    } else if (path.isVariableDeclaration()) {
      var declarations = path.get("declarations");
      for (var _iterator7 = declarations, _isArray7 = Array.isArray(_iterator7), _i7 = 0, _iterator7 = _isArray7 ? _iterator7 : (0, _getIterator3.default)(_iterator7);;) {
        var _ref7;

        if (_isArray7) {
          if (_i7 >= _iterator7.length) break;
          _ref7 = _iterator7[_i7++];
        } else {
          _i7 = _iterator7.next();
          if (_i7.done) break;
          _ref7 = _i7.value;
        }

        var declar = _ref7;

        this.registerBinding(path.node.kind, declar);
      }
    } else if (path.isClassDeclaration()) {
      this.registerBinding("let", path);
    } else if (path.isImportDeclaration()) {
      var specifiers = path.get("specifiers");
      for (var _iterator8 = specifiers, _isArray8 = Array.isArray(_iterator8), _i8 = 0, _iterator8 = _isArray8 ? _iterator8 : (0, _getIterator3.default)(_iterator8);;) {
        var _ref8;

        if (_isArray8) {
          if (_i8 >= _iterator8.length) break;
          _ref8 = _iterator8[_i8++];
        } else {
          _i8 = _iterator8.next();
          if (_i8.done) break;
          _ref8 = _i8.value;
        }

        var specifier = _ref8;

        this.registerBinding("module", specifier);
      }
    } else if (path.isExportDeclaration()) {
      var _declar = path.get("declaration");
      if (_declar.isClassDeclaration() || _declar.isFunctionDeclaration() || _declar.isVariableDeclaration()) {
        this.registerDeclaration(_declar);
      }
    } else {
      this.registerBinding("unknown", path);
    }
  };

  Scope.prototype.buildUndefinedNode = function buildUndefinedNode() {
    if (this.hasBinding("undefined")) {
      return t.unaryExpression("void", t.numericLiteral(0), true);
    } else {
      return t.identifier("undefined");
    }
  };

  Scope.prototype.registerConstantViolation = function registerConstantViolation(path) {
    var ids = path.getBindingIdentifiers();
    for (var name in ids) {
      var binding = this.getBinding(name);
      if (binding) binding.reassign(path);
    }
  };

  Scope.prototype.registerBinding = function registerBinding(kind, path) {
    var bindingPath = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : path;

    if (!kind) throw new ReferenceError("no `kind`");

    if (path.isVariableDeclaration()) {
      var declarators = path.get("declarations");
      for (var _iterator9 = declarators, _isArray9 = Array.isArray(_iterator9), _i9 = 0, _iterator9 = _isArray9 ? _iterator9 : (0, _getIterator3.default)(_iterator9);;) {
        var _ref9;

        if (_isArray9) {
          if (_i9 >= _iterator9.length) break;
          _ref9 = _iterator9[_i9++];
        } else {
          _i9 = _iterator9.next();
          if (_i9.done) break;
          _ref9 = _i9.value;
        }

        var declar = _ref9;

        this.registerBinding(kind, declar);
      }
      return;
    }

    var parent = this.getProgramParent();
    var ids = path.getBindingIdentifiers(true);

    for (var name in ids) {
      for (var _iterator10 = ids[name], _isArray10 = Array.isArray(_iterator10), _i10 = 0, _iterator10 = _isArray10 ? _iterator10 : (0, _getIterator3.default)(_iterator10);;) {
        var _ref10;

        if (_isArray10) {
          if (_i10 >= _iterator10.length) break;
          _ref10 = _iterator10[_i10++];
        } else {
          _i10 = _iterator10.next();
          if (_i10.done) break;
          _ref10 = _i10.value;
        }

        var _id3 = _ref10;

        var local = this.getOwnBinding(name);
        if (local) {
          if (local.identifier === _id3) continue;

          this.checkBlockScopedCollisions(local, kind, name, _id3);
        }

        if (local && local.path.isFlow()) local = null;

        parent.references[name] = true;

        this.bindings[name] = new _binding3.default({
          identifier: _id3,
          existing: local,
          scope: this,
          path: bindingPath,
          kind: kind
        });
      }
    }
  };

  Scope.prototype.addGlobal = function addGlobal(node) {
    this.globals[node.name] = node;
  };

  Scope.prototype.hasUid = function hasUid(name) {
    var scope = this;

    do {
      if (scope.uids[name]) return true;
    } while (scope = scope.parent);

    return false;
  };

  Scope.prototype.hasGlobal = function hasGlobal(name) {
    var scope = this;

    do {
      if (scope.globals[name]) return true;
    } while (scope = scope.parent);

    return false;
  };

  Scope.prototype.hasReference = function hasReference(name) {
    var scope = this;

    do {
      if (scope.references[name]) return true;
    } while (scope = scope.parent);

    return false;
  };

  Scope.prototype.isPure = function isPure(node, constantsOnly) {
    if (t.isIdentifier(node)) {
      var binding = this.getBinding(node.name);
      if (!binding) return false;
      if (constantsOnly) return binding.constant;
      return true;
    } else if (t.isClass(node)) {
      if (node.superClass && !this.isPure(node.superClass, constantsOnly)) return false;
      return this.isPure(node.body, constantsOnly);
    } else if (t.isClassBody(node)) {
      for (var _iterator11 = node.body, _isArray11 = Array.isArray(_iterator11), _i11 = 0, _iterator11 = _isArray11 ? _iterator11 : (0, _getIterator3.default)(_iterator11);;) {
        var _ref11;

        if (_isArray11) {
          if (_i11 >= _iterator11.length) break;
          _ref11 = _iterator11[_i11++];
        } else {
          _i11 = _iterator11.next();
          if (_i11.done) break;
          _ref11 = _i11.value;
        }

        var method = _ref11;

        if (!this.isPure(method, constantsOnly)) return false;
      }
      return true;
    } else if (t.isBinary(node)) {
      return this.isPure(node.left, constantsOnly) && this.isPure(node.right, constantsOnly);
    } else if (t.isArrayExpression(node)) {
      for (var _iterator12 = node.elements, _isArray12 = Array.isArray(_iterator12), _i12 = 0, _iterator12 = _isArray12 ? _iterator12 : (0, _getIterator3.default)(_iterator12);;) {
        var _ref12;

        if (_isArray12) {
          if (_i12 >= _iterator12.length) break;
          _ref12 = _iterator12[_i12++];
        } else {
          _i12 = _iterator12.next();
          if (_i12.done) break;
          _ref12 = _i12.value;
        }

        var elem = _ref12;

        if (!this.isPure(elem, constantsOnly)) return false;
      }
      return true;
    } else if (t.isObjectExpression(node)) {
      for (var _iterator13 = node.properties, _isArray13 = Array.isArray(_iterator13), _i13 = 0, _iterator13 = _isArray13 ? _iterator13 : (0, _getIterator3.default)(_iterator13);;) {
        var _ref13;

        if (_isArray13) {
          if (_i13 >= _iterator13.length) break;
          _ref13 = _iterator13[_i13++];
        } else {
          _i13 = _iterator13.next();
          if (_i13.done) break;
          _ref13 = _i13.value;
        }

        var prop = _ref13;

        if (!this.isPure(prop, constantsOnly)) return false;
      }
      return true;
    } else if (t.isClassMethod(node)) {
      if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
      if (node.kind === "get" || node.kind === "set") return false;
      return true;
    } else if (t.isClassProperty(node) || t.isObjectProperty(node)) {
      if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
      return this.isPure(node.value, constantsOnly);
    } else if (t.isUnaryExpression(node)) {
      return this.isPure(node.argument, constantsOnly);
    } else {
      return t.isPureish(node);
    }
  };

  Scope.prototype.setData = function setData(key, val) {
    return this.data[key] = val;
  };

  Scope.prototype.getData = function getData(key) {
    var scope = this;
    do {
      var data = scope.data[key];
      if (data != null) return data;
    } while (scope = scope.parent);
  };

  Scope.prototype.removeData = function removeData(key) {
    var scope = this;
    do {
      var data = scope.data[key];
      if (data != null) scope.data[key] = null;
    } while (scope = scope.parent);
  };

  Scope.prototype.init = function init() {
    if (!this.references) this.crawl();
  };

  Scope.prototype.crawl = function crawl() {
    _crawlCallsCount++;
    this._crawl();
    _crawlCallsCount--;
  };

  Scope.prototype._crawl = function _crawl() {
    var path = this.path;

    this.references = (0, _create2.default)(null);
    this.bindings = (0, _create2.default)(null);
    this.globals = (0, _create2.default)(null);
    this.uids = (0, _create2.default)(null);
    this.data = (0, _create2.default)(null);

    if (path.isLoop()) {
      for (var _iterator14 = t.FOR_INIT_KEYS, _isArray14 = Array.isArray(_iterator14), _i14 = 0, _iterator14 = _isArray14 ? _iterator14 : (0, _getIterator3.default)(_iterator14);;) {
        var _ref14;

        if (_isArray14) {
          if (_i14 >= _iterator14.length) break;
          _ref14 = _iterator14[_i14++];
        } else {
          _i14 = _iterator14.next();
          if (_i14.done) break;
          _ref14 = _i14.value;
        }

        var key = _ref14;

        var node = path.get(key);
        if (node.isBlockScoped()) this.registerBinding(node.node.kind, node);
      }
    }

    if (path.isFunctionExpression() && path.has("id")) {
      if (!path.get("id").node[t.NOT_LOCAL_BINDING]) {
        this.registerBinding("local", path.get("id"), path);
      }
    }

    if (path.isClassExpression() && path.has("id")) {
      if (!path.get("id").node[t.NOT_LOCAL_BINDING]) {
        this.registerBinding("local", path);
      }
    }

    if (path.isFunction()) {
      var params = path.get("params");
      for (var _iterator15 = params, _isArray15 = Array.isArray(_iterator15), _i15 = 0, _iterator15 = _isArray15 ? _iterator15 : (0, _getIterator3.default)(_iterator15);;) {
        var _ref15;

        if (_isArray15) {
          if (_i15 >= _iterator15.length) break;
          _ref15 = _iterator15[_i15++];
        } else {
          _i15 = _iterator15.next();
          if (_i15.done) break;
          _ref15 = _i15.value;
        }

        var param = _ref15;

        this.registerBinding("param", param);
      }
    }

    if (path.isCatchClause()) {
      this.registerBinding("let", path);
    }

    var parent = this.getProgramParent();
    if (parent.crawling) return;

    var state = {
      references: [],
      constantViolations: [],
      assignments: []
    };

    this.crawling = true;
    path.traverse(collectorVisitor, state);
    this.crawling = false;

    for (var _iterator16 = state.assignments, _isArray16 = Array.isArray(_iterator16), _i16 = 0, _iterator16 = _isArray16 ? _iterator16 : (0, _getIterator3.default)(_iterator16);;) {
      var _ref16;

      if (_isArray16) {
        if (_i16 >= _iterator16.length) break;
        _ref16 = _iterator16[_i16++];
      } else {
        _i16 = _iterator16.next();
        if (_i16.done) break;
        _ref16 = _i16.value;
      }

      var _path = _ref16;

      var ids = _path.getBindingIdentifiers();
      var programParent = void 0;
      for (var name in ids) {
        if (_path.scope.getBinding(name)) continue;

        programParent = programParent || _path.scope.getProgramParent();
        programParent.addGlobal(ids[name]);
      }

      _path.scope.registerConstantViolation(_path);
    }

    for (var _iterator17 = state.references, _isArray17 = Array.isArray(_iterator17), _i17 = 0, _iterator17 = _isArray17 ? _iterator17 : (0, _getIterator3.default)(_iterator17);;) {
      var _ref17;

      if (_isArray17) {
        if (_i17 >= _iterator17.length) break;
        _ref17 = _iterator17[_i17++];
      } else {
        _i17 = _iterator17.next();
        if (_i17.done) break;
        _ref17 = _i17.value;
      }

      var ref = _ref17;

      var binding = ref.scope.getBinding(ref.node.name);
      if (binding) {
        binding.reference(ref);
      } else {
        ref.scope.getProgramParent().addGlobal(ref.node);
      }
    }

    for (var _iterator18 = state.constantViolations, _isArray18 = Array.isArray(_iterator18), _i18 = 0, _iterator18 = _isArray18 ? _iterator18 : (0, _getIterator3.default)(_iterator18);;) {
      var _ref18;

      if (_isArray18) {
        if (_i18 >= _iterator18.length) break;
        _ref18 = _iterator18[_i18++];
      } else {
        _i18 = _iterator18.next();
        if (_i18.done) break;
        _ref18 = _i18.value;
      }

      var _path2 = _ref18;

      _path2.scope.registerConstantViolation(_path2);
    }
  };

  Scope.prototype.push = function push(opts) {
    var path = this.path;

    if (!path.isBlockStatement() && !path.isProgram()) {
      path = this.getBlockParent().path;
    }

    if (path.isSwitchStatement()) {
      path = this.getFunctionParent().path;
    }

    if (path.isLoop() || path.isCatchClause() || path.isFunction()) {
      t.ensureBlock(path.node);
      path = path.get("body");
    }

    var unique = opts.unique;
    var kind = opts.kind || "var";
    var blockHoist = opts._blockHoist == null ? 2 : opts._blockHoist;

    var dataKey = "declaration:" + kind + ":" + blockHoist;
    var declarPath = !unique && path.getData(dataKey);

    if (!declarPath) {
      var declar = t.variableDeclaration(kind, []);
      declar._generated = true;
      declar._blockHoist = blockHoist;

      var _path$unshiftContaine = path.unshiftContainer("body", [declar]);

      declarPath = _path$unshiftContaine[0];

      if (!unique) path.setData(dataKey, declarPath);
    }

    var declarator = t.variableDeclarator(opts.id, opts.init);
    declarPath.node.declarations.push(declarator);
    this.registerBinding(kind, declarPath.get("declarations").pop());
  };

  Scope.prototype.getProgramParent = function getProgramParent() {
    var scope = this;
    do {
      if (scope.path.isProgram()) {
        return scope;
      }
    } while (scope = scope.parent);
    throw new Error("We couldn't find a Function or Program...");
  };

  Scope.prototype.getFunctionParent = function getFunctionParent() {
    var scope = this;
    do {
      if (scope.path.isFunctionParent()) {
        return scope;
      }
    } while (scope = scope.parent);
    throw new Error("We couldn't find a Function or Program...");
  };

  Scope.prototype.getBlockParent = function getBlockParent() {
    var scope = this;
    do {
      if (scope.path.isBlockParent()) {
        return scope;
      }
    } while (scope = scope.parent);
    throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
  };

  Scope.prototype.getAllBindings = function getAllBindings() {
    var ids = (0, _create2.default)(null);

    var scope = this;
    do {
      (0, _defaults2.default)(ids, scope.bindings);
      scope = scope.parent;
    } while (scope);

    return ids;
  };

  Scope.prototype.getAllBindingsOfKind = function getAllBindingsOfKind() {
    var ids = (0, _create2.default)(null);

    for (var _iterator19 = arguments, _isArray19 = Array.isArray(_iterator19), _i19 = 0, _iterator19 = _isArray19 ? _iterator19 : (0, _getIterator3.default)(_iterator19);;) {
      var _ref19;

      if (_isArray19) {
        if (_i19 >= _iterator19.length) break;
        _ref19 = _iterator19[_i19++];
      } else {
        _i19 = _iterator19.next();
        if (_i19.done) break;
        _ref19 = _i19.value;
      }

      var kind = _ref19;

      var scope = this;
      do {
        for (var name in scope.bindings) {
          var binding = scope.bindings[name];
          if (binding.kind === kind) ids[name] = binding;
        }
        scope = scope.parent;
      } while (scope);
    }

    return ids;
  };

  Scope.prototype.bindingIdentifierEquals = function bindingIdentifierEquals(name, node) {
    return this.getBindingIdentifier(name) === node;
  };

  Scope.prototype.warnOnFlowBinding = function warnOnFlowBinding(binding) {
    if (_crawlCallsCount === 0 && binding && binding.path.isFlow()) {
      console.warn("\n        You or one of the Babel plugins you are using are using Flow declarations as bindings.\n        Support for this will be removed in version 7. To find out the caller, grep for this\n        message and change it to a `console.trace()`.\n      ");
    }
    return binding;
  };

  Scope.prototype.getBinding = function getBinding(name) {
    var scope = this;

    do {
      var binding = scope.getOwnBinding(name);
      if (binding) return this.warnOnFlowBinding(binding);
    } while (scope = scope.parent);
  };

  Scope.prototype.getOwnBinding = function getOwnBinding(name) {
    return this.warnOnFlowBinding(this.bindings[name]);
  };

  Scope.prototype.getBindingIdentifier = function getBindingIdentifier(name) {
    var info = this.getBinding(name);
    return info && info.identifier;
  };

  Scope.prototype.getOwnBindingIdentifier = function getOwnBindingIdentifier(name) {
    var binding = this.bindings[name];
    return binding && binding.identifier;
  };

  Scope.prototype.hasOwnBinding = function hasOwnBinding(name) {
    return !!this.getOwnBinding(name);
  };

  Scope.prototype.hasBinding = function hasBinding(name, noGlobals) {
    if (!name) return false;
    if (this.hasOwnBinding(name)) return true;
    if (this.parentHasBinding(name, noGlobals)) return true;
    if (this.hasUid(name)) return true;
    if (!noGlobals && (0, _includes2.default)(Scope.globals, name)) return true;
    if (!noGlobals && (0, _includes2.default)(Scope.contextVariables, name)) return true;
    return false;
  };

  Scope.prototype.parentHasBinding = function parentHasBinding(name, noGlobals) {
    return this.parent && this.parent.hasBinding(name, noGlobals);
  };

  Scope.prototype.moveBindingTo = function moveBindingTo(name, scope) {
    var info = this.getBinding(name);
    if (info) {
      info.scope.removeOwnBinding(name);
      info.scope = scope;
      scope.bindings[name] = info;
    }
  };

  Scope.prototype.removeOwnBinding = function removeOwnBinding(name) {
    delete this.bindings[name];
  };

  Scope.prototype.removeBinding = function removeBinding(name) {
    var info = this.getBinding(name);
    if (info) {
      info.scope.removeOwnBinding(name);
    }

    var scope = this;
    do {
      if (scope.uids[name]) {
        scope.uids[name] = false;
      }
    } while (scope = scope.parent);
  };

  return Scope;
}();

Scope.globals = (0, _keys2.default)(_globals2.default.builtin);
Scope.contextVariables = ["arguments", "undefined", "Infinity", "NaN"];
exports.default = Scope;
module.exports = exports["default"];