function _arrayLikeToArray(r, a) {
  (null == a || a > r.length) && (a = r.length);
  for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
  return n;
}
function _arrayWithHoles(r) {
  if (Array.isArray(r)) return r;
}
function _arrayWithoutHoles(r) {
  if (Array.isArray(r)) return _arrayLikeToArray(r);
}
function _iterableToArray(r) {
  if ("undefined" != typeof Symbol && null != r[Symbol.iterator] || null != r["@@iterator"]) return Array.from(r);
}
function _iterableToArrayLimit(r, l) {
  var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
  if (null != t) {
    var e,
      n,
      i,
      u,
      a = [],
      f = !0,
      o = !1;
    try {
      if (i = (t = t.call(r)).next, 0 === l) {
        if (Object(t) !== t) return;
        f = !1;
      } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
    } catch (r) {
      o = !0, n = r;
    } finally {
      try {
        if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return;
      } finally {
        if (o) throw n;
      }
    }
    return a;
  }
}
function _nonIterableRest() {
  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _nonIterableSpread() {
  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _slicedToArray(r, e) {
  return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest();
}
function _toConsumableArray(r) {
  return _arrayWithoutHoles(r) || _iterableToArray(r) || _unsupportedIterableToArray(r) || _nonIterableSpread();
}
function _typeof(o) {
  "@babel/helpers - typeof";

  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) {
    return typeof o;
  } : function (o) {
    return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
  }, _typeof(o);
}
function _unsupportedIterableToArray(r, a) {
  if (r) {
    if ("string" == typeof r) return _arrayLikeToArray(r, a);
    var t = {}.toString.call(r).slice(8, -1);
    return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0;
  }
}

var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

function createCommonjsModule(fn, module) {
	return module = { exports: {} }, fn(module, module.exports), module.exports;
}

var estraverse = createCommonjsModule(function (module, exports) {
  /*
    Copyright (C) 2012-2013 Yusuke Suzuki <utatane.tea@gmail.com>
    Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
  
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:
  
      * Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
      * Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
  
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  /*jslint vars:false, bitwise:true*/
  /*jshint indent:4*/
  /*global exports:true*/
  (function clone(exports) {

    var Syntax, VisitorOption, VisitorKeys, BREAK, SKIP, REMOVE;
    function deepCopy(obj) {
      var ret = {},
        key,
        val;
      for (key in obj) {
        if (obj.hasOwnProperty(key)) {
          val = obj[key];
          if (typeof val === 'object' && val !== null) {
            ret[key] = deepCopy(val);
          } else {
            ret[key] = val;
          }
        }
      }
      return ret;
    }

    // based on LLVM libc++ upper_bound / lower_bound
    // MIT License

    function upperBound(array, func) {
      var diff, len, i, current;
      len = array.length;
      i = 0;
      while (len) {
        diff = len >>> 1;
        current = i + diff;
        if (func(array[current])) {
          len = diff;
        } else {
          i = current + 1;
          len -= diff + 1;
        }
      }
      return i;
    }
    Syntax = {
      AssignmentExpression: 'AssignmentExpression',
      AssignmentPattern: 'AssignmentPattern',
      ArrayExpression: 'ArrayExpression',
      ArrayPattern: 'ArrayPattern',
      ArrowFunctionExpression: 'ArrowFunctionExpression',
      AwaitExpression: 'AwaitExpression',
      // CAUTION: It's deferred to ES7.
      BlockStatement: 'BlockStatement',
      BinaryExpression: 'BinaryExpression',
      BreakStatement: 'BreakStatement',
      CallExpression: 'CallExpression',
      CatchClause: 'CatchClause',
      ChainExpression: 'ChainExpression',
      ClassBody: 'ClassBody',
      ClassDeclaration: 'ClassDeclaration',
      ClassExpression: 'ClassExpression',
      ComprehensionBlock: 'ComprehensionBlock',
      // CAUTION: It's deferred to ES7.
      ComprehensionExpression: 'ComprehensionExpression',
      // CAUTION: It's deferred to ES7.
      ConditionalExpression: 'ConditionalExpression',
      ContinueStatement: 'ContinueStatement',
      DebuggerStatement: 'DebuggerStatement',
      DirectiveStatement: 'DirectiveStatement',
      DoWhileStatement: 'DoWhileStatement',
      EmptyStatement: 'EmptyStatement',
      ExportAllDeclaration: 'ExportAllDeclaration',
      ExportDefaultDeclaration: 'ExportDefaultDeclaration',
      ExportNamedDeclaration: 'ExportNamedDeclaration',
      ExportSpecifier: 'ExportSpecifier',
      ExpressionStatement: 'ExpressionStatement',
      ForStatement: 'ForStatement',
      ForInStatement: 'ForInStatement',
      ForOfStatement: 'ForOfStatement',
      FunctionDeclaration: 'FunctionDeclaration',
      FunctionExpression: 'FunctionExpression',
      GeneratorExpression: 'GeneratorExpression',
      // CAUTION: It's deferred to ES7.
      Identifier: 'Identifier',
      IfStatement: 'IfStatement',
      ImportExpression: 'ImportExpression',
      ImportDeclaration: 'ImportDeclaration',
      ImportDefaultSpecifier: 'ImportDefaultSpecifier',
      ImportNamespaceSpecifier: 'ImportNamespaceSpecifier',
      ImportSpecifier: 'ImportSpecifier',
      Literal: 'Literal',
      LabeledStatement: 'LabeledStatement',
      LogicalExpression: 'LogicalExpression',
      MemberExpression: 'MemberExpression',
      MetaProperty: 'MetaProperty',
      MethodDefinition: 'MethodDefinition',
      ModuleSpecifier: 'ModuleSpecifier',
      NewExpression: 'NewExpression',
      ObjectExpression: 'ObjectExpression',
      ObjectPattern: 'ObjectPattern',
      PrivateIdentifier: 'PrivateIdentifier',
      Program: 'Program',
      Property: 'Property',
      PropertyDefinition: 'PropertyDefinition',
      RestElement: 'RestElement',
      ReturnStatement: 'ReturnStatement',
      SequenceExpression: 'SequenceExpression',
      SpreadElement: 'SpreadElement',
      Super: 'Super',
      SwitchStatement: 'SwitchStatement',
      SwitchCase: 'SwitchCase',
      TaggedTemplateExpression: 'TaggedTemplateExpression',
      TemplateElement: 'TemplateElement',
      TemplateLiteral: 'TemplateLiteral',
      ThisExpression: 'ThisExpression',
      ThrowStatement: 'ThrowStatement',
      TryStatement: 'TryStatement',
      UnaryExpression: 'UnaryExpression',
      UpdateExpression: 'UpdateExpression',
      VariableDeclaration: 'VariableDeclaration',
      VariableDeclarator: 'VariableDeclarator',
      WhileStatement: 'WhileStatement',
      WithStatement: 'WithStatement',
      YieldExpression: 'YieldExpression'
    };
    VisitorKeys = {
      AssignmentExpression: ['left', 'right'],
      AssignmentPattern: ['left', 'right'],
      ArrayExpression: ['elements'],
      ArrayPattern: ['elements'],
      ArrowFunctionExpression: ['params', 'body'],
      AwaitExpression: ['argument'],
      // CAUTION: It's deferred to ES7.
      BlockStatement: ['body'],
      BinaryExpression: ['left', 'right'],
      BreakStatement: ['label'],
      CallExpression: ['callee', 'arguments'],
      CatchClause: ['param', 'body'],
      ChainExpression: ['expression'],
      ClassBody: ['body'],
      ClassDeclaration: ['id', 'superClass', 'body'],
      ClassExpression: ['id', 'superClass', 'body'],
      ComprehensionBlock: ['left', 'right'],
      // CAUTION: It's deferred to ES7.
      ComprehensionExpression: ['blocks', 'filter', 'body'],
      // CAUTION: It's deferred to ES7.
      ConditionalExpression: ['test', 'consequent', 'alternate'],
      ContinueStatement: ['label'],
      DebuggerStatement: [],
      DirectiveStatement: [],
      DoWhileStatement: ['body', 'test'],
      EmptyStatement: [],
      ExportAllDeclaration: ['source'],
      ExportDefaultDeclaration: ['declaration'],
      ExportNamedDeclaration: ['declaration', 'specifiers', 'source'],
      ExportSpecifier: ['exported', 'local'],
      ExpressionStatement: ['expression'],
      ForStatement: ['init', 'test', 'update', 'body'],
      ForInStatement: ['left', 'right', 'body'],
      ForOfStatement: ['left', 'right', 'body'],
      FunctionDeclaration: ['id', 'params', 'body'],
      FunctionExpression: ['id', 'params', 'body'],
      GeneratorExpression: ['blocks', 'filter', 'body'],
      // CAUTION: It's deferred to ES7.
      Identifier: [],
      IfStatement: ['test', 'consequent', 'alternate'],
      ImportExpression: ['source'],
      ImportDeclaration: ['specifiers', 'source'],
      ImportDefaultSpecifier: ['local'],
      ImportNamespaceSpecifier: ['local'],
      ImportSpecifier: ['imported', 'local'],
      Literal: [],
      LabeledStatement: ['label', 'body'],
      LogicalExpression: ['left', 'right'],
      MemberExpression: ['object', 'property'],
      MetaProperty: ['meta', 'property'],
      MethodDefinition: ['key', 'value'],
      ModuleSpecifier: [],
      NewExpression: ['callee', 'arguments'],
      ObjectExpression: ['properties'],
      ObjectPattern: ['properties'],
      PrivateIdentifier: [],
      Program: ['body'],
      Property: ['key', 'value'],
      PropertyDefinition: ['key', 'value'],
      RestElement: ['argument'],
      ReturnStatement: ['argument'],
      SequenceExpression: ['expressions'],
      SpreadElement: ['argument'],
      Super: [],
      SwitchStatement: ['discriminant', 'cases'],
      SwitchCase: ['test', 'consequent'],
      TaggedTemplateExpression: ['tag', 'quasi'],
      TemplateElement: [],
      TemplateLiteral: ['quasis', 'expressions'],
      ThisExpression: [],
      ThrowStatement: ['argument'],
      TryStatement: ['block', 'handler', 'finalizer'],
      UnaryExpression: ['argument'],
      UpdateExpression: ['argument'],
      VariableDeclaration: ['declarations'],
      VariableDeclarator: ['id', 'init'],
      WhileStatement: ['test', 'body'],
      WithStatement: ['object', 'body'],
      YieldExpression: ['argument']
    };

    // unique id
    BREAK = {};
    SKIP = {};
    REMOVE = {};
    VisitorOption = {
      Break: BREAK,
      Skip: SKIP,
      Remove: REMOVE
    };
    function Reference(parent, key) {
      this.parent = parent;
      this.key = key;
    }
    Reference.prototype.replace = function replace(node) {
      this.parent[this.key] = node;
    };
    Reference.prototype.remove = function remove() {
      if (Array.isArray(this.parent)) {
        this.parent.splice(this.key, 1);
        return true;
      } else {
        this.replace(null);
        return false;
      }
    };
    function Element(node, path, wrap, ref) {
      this.node = node;
      this.path = path;
      this.wrap = wrap;
      this.ref = ref;
    }
    function Controller() {}

    // API:
    // return property path array from root to current node
    Controller.prototype.path = function path() {
      var i, iz, j, jz, result, element;
      function addToPath(result, path) {
        if (Array.isArray(path)) {
          for (j = 0, jz = path.length; j < jz; ++j) {
            result.push(path[j]);
          }
        } else {
          result.push(path);
        }
      }

      // root node
      if (!this.__current.path) {
        return null;
      }

      // first node is sentinel, second node is root element
      result = [];
      for (i = 2, iz = this.__leavelist.length; i < iz; ++i) {
        element = this.__leavelist[i];
        addToPath(result, element.path);
      }
      addToPath(result, this.__current.path);
      return result;
    };

    // API:
    // return type of current node
    Controller.prototype.type = function () {
      var node = this.current();
      return node.type || this.__current.wrap;
    };

    // API:
    // return array of parent elements
    Controller.prototype.parents = function parents() {
      var i, iz, result;

      // first node is sentinel
      result = [];
      for (i = 1, iz = this.__leavelist.length; i < iz; ++i) {
        result.push(this.__leavelist[i].node);
      }
      return result;
    };

    // API:
    // return current node
    Controller.prototype.current = function current() {
      return this.__current.node;
    };
    Controller.prototype.__execute = function __execute(callback, element) {
      var previous, result;
      result = undefined;
      previous = this.__current;
      this.__current = element;
      this.__state = null;
      if (callback) {
        result = callback.call(this, element.node, this.__leavelist[this.__leavelist.length - 1].node);
      }
      this.__current = previous;
      return result;
    };

    // API:
    // notify control skip / break
    Controller.prototype.notify = function notify(flag) {
      this.__state = flag;
    };

    // API:
    // skip child nodes of current node
    Controller.prototype.skip = function () {
      this.notify(SKIP);
    };

    // API:
    // break traversals
    Controller.prototype['break'] = function () {
      this.notify(BREAK);
    };

    // API:
    // remove node
    Controller.prototype.remove = function () {
      this.notify(REMOVE);
    };
    Controller.prototype.__initialize = function (root, visitor) {
      this.visitor = visitor;
      this.root = root;
      this.__worklist = [];
      this.__leavelist = [];
      this.__current = null;
      this.__state = null;
      this.__fallback = null;
      if (visitor.fallback === 'iteration') {
        this.__fallback = Object.keys;
      } else if (typeof visitor.fallback === 'function') {
        this.__fallback = visitor.fallback;
      }
      this.__keys = VisitorKeys;
      if (visitor.keys) {
        this.__keys = Object.assign(Object.create(this.__keys), visitor.keys);
      }
    };
    function isNode(node) {
      if (node == null) {
        return false;
      }
      return typeof node === 'object' && typeof node.type === 'string';
    }
    function isProperty(nodeType, key) {
      return (nodeType === Syntax.ObjectExpression || nodeType === Syntax.ObjectPattern) && 'properties' === key;
    }
    function candidateExistsInLeaveList(leavelist, candidate) {
      for (var i = leavelist.length - 1; i >= 0; --i) {
        if (leavelist[i].node === candidate) {
          return true;
        }
      }
      return false;
    }
    Controller.prototype.traverse = function traverse(root, visitor) {
      var worklist, leavelist, element, node, nodeType, ret, key, current, current2, candidates, candidate, sentinel;
      this.__initialize(root, visitor);
      sentinel = {};

      // reference
      worklist = this.__worklist;
      leavelist = this.__leavelist;

      // initialize
      worklist.push(new Element(root, null, null, null));
      leavelist.push(new Element(null, null, null, null));
      while (worklist.length) {
        element = worklist.pop();
        if (element === sentinel) {
          element = leavelist.pop();
          ret = this.__execute(visitor.leave, element);
          if (this.__state === BREAK || ret === BREAK) {
            return;
          }
          continue;
        }
        if (element.node) {
          ret = this.__execute(visitor.enter, element);
          if (this.__state === BREAK || ret === BREAK) {
            return;
          }
          worklist.push(sentinel);
          leavelist.push(element);
          if (this.__state === SKIP || ret === SKIP) {
            continue;
          }
          node = element.node;
          nodeType = node.type || element.wrap;
          candidates = this.__keys[nodeType];
          if (!candidates) {
            if (this.__fallback) {
              candidates = this.__fallback(node);
            } else {
              throw new Error('Unknown node type ' + nodeType + '.');
            }
          }
          current = candidates.length;
          while ((current -= 1) >= 0) {
            key = candidates[current];
            candidate = node[key];
            if (!candidate) {
              continue;
            }
            if (Array.isArray(candidate)) {
              current2 = candidate.length;
              while ((current2 -= 1) >= 0) {
                if (!candidate[current2]) {
                  continue;
                }
                if (candidateExistsInLeaveList(leavelist, candidate[current2])) {
                  continue;
                }
                if (isProperty(nodeType, candidates[current])) {
                  element = new Element(candidate[current2], [key, current2], 'Property', null);
                } else if (isNode(candidate[current2])) {
                  element = new Element(candidate[current2], [key, current2], null, null);
                } else {
                  continue;
                }
                worklist.push(element);
              }
            } else if (isNode(candidate)) {
              if (candidateExistsInLeaveList(leavelist, candidate)) {
                continue;
              }
              worklist.push(new Element(candidate, key, null, null));
            }
          }
        }
      }
    };
    Controller.prototype.replace = function replace(root, visitor) {
      var worklist, leavelist, node, nodeType, target, element, current, current2, candidates, candidate, sentinel, outer, key;
      function removeElem(element) {
        var i, key, nextElem, parent;
        if (element.ref.remove()) {
          // When the reference is an element of an array.
          key = element.ref.key;
          parent = element.ref.parent;

          // If removed from array, then decrease following items' keys.
          i = worklist.length;
          while (i--) {
            nextElem = worklist[i];
            if (nextElem.ref && nextElem.ref.parent === parent) {
              if (nextElem.ref.key < key) {
                break;
              }
              --nextElem.ref.key;
            }
          }
        }
      }
      this.__initialize(root, visitor);
      sentinel = {};

      // reference
      worklist = this.__worklist;
      leavelist = this.__leavelist;

      // initialize
      outer = {
        root: root
      };
      element = new Element(root, null, null, new Reference(outer, 'root'));
      worklist.push(element);
      leavelist.push(element);
      while (worklist.length) {
        element = worklist.pop();
        if (element === sentinel) {
          element = leavelist.pop();
          target = this.__execute(visitor.leave, element);

          // node may be replaced with null,
          // so distinguish between undefined and null in this place
          if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
            // replace
            element.ref.replace(target);
          }
          if (this.__state === REMOVE || target === REMOVE) {
            removeElem(element);
          }
          if (this.__state === BREAK || target === BREAK) {
            return outer.root;
          }
          continue;
        }
        target = this.__execute(visitor.enter, element);

        // node may be replaced with null,
        // so distinguish between undefined and null in this place
        if (target !== undefined && target !== BREAK && target !== SKIP && target !== REMOVE) {
          // replace
          element.ref.replace(target);
          element.node = target;
        }
        if (this.__state === REMOVE || target === REMOVE) {
          removeElem(element);
          element.node = null;
        }
        if (this.__state === BREAK || target === BREAK) {
          return outer.root;
        }

        // node may be null
        node = element.node;
        if (!node) {
          continue;
        }
        worklist.push(sentinel);
        leavelist.push(element);
        if (this.__state === SKIP || target === SKIP) {
          continue;
        }
        nodeType = node.type || element.wrap;
        candidates = this.__keys[nodeType];
        if (!candidates) {
          if (this.__fallback) {
            candidates = this.__fallback(node);
          } else {
            throw new Error('Unknown node type ' + nodeType + '.');
          }
        }
        current = candidates.length;
        while ((current -= 1) >= 0) {
          key = candidates[current];
          candidate = node[key];
          if (!candidate) {
            continue;
          }
          if (Array.isArray(candidate)) {
            current2 = candidate.length;
            while ((current2 -= 1) >= 0) {
              if (!candidate[current2]) {
                continue;
              }
              if (isProperty(nodeType, candidates[current])) {
                element = new Element(candidate[current2], [key, current2], 'Property', new Reference(candidate, current2));
              } else if (isNode(candidate[current2])) {
                element = new Element(candidate[current2], [key, current2], null, new Reference(candidate, current2));
              } else {
                continue;
              }
              worklist.push(element);
            }
          } else if (isNode(candidate)) {
            worklist.push(new Element(candidate, key, null, new Reference(node, key)));
          }
        }
      }
      return outer.root;
    };
    function traverse(root, visitor) {
      var controller = new Controller();
      return controller.traverse(root, visitor);
    }
    function replace(root, visitor) {
      var controller = new Controller();
      return controller.replace(root, visitor);
    }
    function extendCommentRange(comment, tokens) {
      var target;
      target = upperBound(tokens, function search(token) {
        return token.range[0] > comment.range[0];
      });
      comment.extendedRange = [comment.range[0], comment.range[1]];
      if (target !== tokens.length) {
        comment.extendedRange[1] = tokens[target].range[0];
      }
      target -= 1;
      if (target >= 0) {
        comment.extendedRange[0] = tokens[target].range[1];
      }
      return comment;
    }
    function attachComments(tree, providedComments, tokens) {
      // At first, we should calculate extended comment ranges.
      var comments = [],
        comment,
        len,
        i,
        cursor;
      if (!tree.range) {
        throw new Error('attachComments needs range information');
      }

      // tokens array is empty, we attach comments to tree as 'leadingComments'
      if (!tokens.length) {
        if (providedComments.length) {
          for (i = 0, len = providedComments.length; i < len; i += 1) {
            comment = deepCopy(providedComments[i]);
            comment.extendedRange = [0, tree.range[0]];
            comments.push(comment);
          }
          tree.leadingComments = comments;
        }
        return tree;
      }
      for (i = 0, len = providedComments.length; i < len; i += 1) {
        comments.push(extendCommentRange(deepCopy(providedComments[i]), tokens));
      }

      // This is based on John Freeman's implementation.
      cursor = 0;
      traverse(tree, {
        enter: function (node) {
          var comment;
          while (cursor < comments.length) {
            comment = comments[cursor];
            if (comment.extendedRange[1] > node.range[0]) {
              break;
            }
            if (comment.extendedRange[1] === node.range[0]) {
              if (!node.leadingComments) {
                node.leadingComments = [];
              }
              node.leadingComments.push(comment);
              comments.splice(cursor, 1);
            } else {
              cursor += 1;
            }
          }

          // already out of owned node
          if (cursor === comments.length) {
            return VisitorOption.Break;
          }
          if (comments[cursor].extendedRange[0] > node.range[1]) {
            return VisitorOption.Skip;
          }
        }
      });
      cursor = 0;
      traverse(tree, {
        leave: function (node) {
          var comment;
          while (cursor < comments.length) {
            comment = comments[cursor];
            if (node.range[1] < comment.extendedRange[0]) {
              break;
            }
            if (node.range[1] === comment.extendedRange[0]) {
              if (!node.trailingComments) {
                node.trailingComments = [];
              }
              node.trailingComments.push(comment);
              comments.splice(cursor, 1);
            } else {
              cursor += 1;
            }
          }

          // already out of owned node
          if (cursor === comments.length) {
            return VisitorOption.Break;
          }
          if (comments[cursor].extendedRange[0] > node.range[1]) {
            return VisitorOption.Skip;
          }
        }
      });
      return tree;
    }
    exports.Syntax = Syntax;
    exports.traverse = traverse;
    exports.replace = replace;
    exports.attachComments = attachComments;
    exports.VisitorKeys = VisitorKeys;
    exports.VisitorOption = VisitorOption;
    exports.Controller = Controller;
    exports.cloneEnvironment = function () {
      return clone({});
    };
    return exports;
  })(exports);
  /* vim: set sw=4 ts=4 et tw=80 : */
});

var parser = createCommonjsModule(function (module) {
  /*
   * Generated by PEG.js 0.10.0.
   *
   * http://pegjs.org/
   */
  (function (root, factory) {
    if ( module.exports) {
      module.exports = factory();
    }
  })(commonjsGlobal, function () {

    function peg$subclass(child, parent) {
      function ctor() {
        this.constructor = child;
      }
      ctor.prototype = parent.prototype;
      child.prototype = new ctor();
    }
    function peg$SyntaxError(message, expected, found, location) {
      this.message = message;
      this.expected = expected;
      this.found = found;
      this.location = location;
      this.name = "SyntaxError";
      if (typeof Error.captureStackTrace === "function") {
        Error.captureStackTrace(this, peg$SyntaxError);
      }
    }
    peg$subclass(peg$SyntaxError, Error);
    peg$SyntaxError.buildMessage = function (expected, found) {
      var DESCRIBE_EXPECTATION_FNS = {
        literal: function literal(expectation) {
          return "\"" + literalEscape(expectation.text) + "\"";
        },
        "class": function _class(expectation) {
          var escapedParts = "",
            i;
          for (i = 0; i < expectation.parts.length; i++) {
            escapedParts += expectation.parts[i] instanceof Array ? classEscape(expectation.parts[i][0]) + "-" + classEscape(expectation.parts[i][1]) : classEscape(expectation.parts[i]);
          }
          return "[" + (expectation.inverted ? "^" : "") + escapedParts + "]";
        },
        any: function any(expectation) {
          return "any character";
        },
        end: function end(expectation) {
          return "end of input";
        },
        other: function other(expectation) {
          return expectation.description;
        }
      };
      function hex(ch) {
        return ch.charCodeAt(0).toString(16).toUpperCase();
      }
      function literalEscape(s) {
        return s.replace(/\\/g, '\\\\').replace(/"/g, '\\"').replace(/\0/g, '\\0').replace(/\t/g, '\\t').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/[\x00-\x0F]/g, function (ch) {
          return '\\x0' + hex(ch);
        }).replace(/[\x10-\x1F\x7F-\x9F]/g, function (ch) {
          return '\\x' + hex(ch);
        });
      }
      function classEscape(s) {
        return s.replace(/\\/g, '\\\\').replace(/\]/g, '\\]').replace(/\^/g, '\\^').replace(/-/g, '\\-').replace(/\0/g, '\\0').replace(/\t/g, '\\t').replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/[\x00-\x0F]/g, function (ch) {
          return '\\x0' + hex(ch);
        }).replace(/[\x10-\x1F\x7F-\x9F]/g, function (ch) {
          return '\\x' + hex(ch);
        });
      }
      function describeExpectation(expectation) {
        return DESCRIBE_EXPECTATION_FNS[expectation.type](expectation);
      }
      function describeExpected(expected) {
        var descriptions = new Array(expected.length),
          i,
          j;
        for (i = 0; i < expected.length; i++) {
          descriptions[i] = describeExpectation(expected[i]);
        }
        descriptions.sort();
        if (descriptions.length > 0) {
          for (i = 1, j = 1; i < descriptions.length; i++) {
            if (descriptions[i - 1] !== descriptions[i]) {
              descriptions[j] = descriptions[i];
              j++;
            }
          }
          descriptions.length = j;
        }
        switch (descriptions.length) {
          case 1:
            return descriptions[0];
          case 2:
            return descriptions[0] + " or " + descriptions[1];
          default:
            return descriptions.slice(0, -1).join(", ") + ", or " + descriptions[descriptions.length - 1];
        }
      }
      function describeFound(found) {
        return found ? "\"" + literalEscape(found) + "\"" : "end of input";
      }
      return "Expected " + describeExpected(expected) + " but " + describeFound(found) + " found.";
    };
    function peg$parse(input, options) {
      options = options !== void 0 ? options : {};
      var peg$FAILED = {},
        peg$startRuleFunctions = {
          start: peg$parsestart
        },
        peg$startRuleFunction = peg$parsestart,
        peg$c0 = function peg$c0(ss) {
          return ss.length === 1 ? ss[0] : {
            type: 'matches',
            selectors: ss
          };
        },
        peg$c1 = function peg$c1() {
          return void 0;
        },
        peg$c2 = " ",
        peg$c3 = peg$literalExpectation(" ", false),
        peg$c4 = /^[^ [\],():#!=><~+.]/,
        peg$c5 = peg$classExpectation([" ", "[", "]", ",", "(", ")", ":", "#", "!", "=", ">", "<", "~", "+", "."], true, false),
        peg$c6 = function peg$c6(i) {
          return i.join('');
        },
        peg$c7 = ">",
        peg$c8 = peg$literalExpectation(">", false),
        peg$c9 = function peg$c9() {
          return 'child';
        },
        peg$c10 = "~",
        peg$c11 = peg$literalExpectation("~", false),
        peg$c12 = function peg$c12() {
          return 'sibling';
        },
        peg$c13 = "+",
        peg$c14 = peg$literalExpectation("+", false),
        peg$c15 = function peg$c15() {
          return 'adjacent';
        },
        peg$c16 = function peg$c16() {
          return 'descendant';
        },
        peg$c17 = ",",
        peg$c18 = peg$literalExpectation(",", false),
        peg$c19 = function peg$c19(s, ss) {
          return [s].concat(ss.map(function (s) {
            return s[3];
          }));
        },
        peg$c20 = function peg$c20(op, s) {
          if (!op) return s;
          return {
            type: op,
            left: {
              type: 'exactNode'
            },
            right: s
          };
        },
        peg$c21 = function peg$c21(a, ops) {
          return ops.reduce(function (memo, rhs) {
            return {
              type: rhs[0],
              left: memo,
              right: rhs[1]
            };
          }, a);
        },
        peg$c22 = "!",
        peg$c23 = peg$literalExpectation("!", false),
        peg$c24 = function peg$c24(subject, as) {
          var b = as.length === 1 ? as[0] : {
            type: 'compound',
            selectors: as
          };
          if (subject) b.subject = true;
          return b;
        },
        peg$c25 = "*",
        peg$c26 = peg$literalExpectation("*", false),
        peg$c27 = function peg$c27(a) {
          return {
            type: 'wildcard',
            value: a
          };
        },
        peg$c28 = "#",
        peg$c29 = peg$literalExpectation("#", false),
        peg$c30 = function peg$c30(i) {
          return {
            type: 'identifier',
            value: i
          };
        },
        peg$c31 = "[",
        peg$c32 = peg$literalExpectation("[", false),
        peg$c33 = "]",
        peg$c34 = peg$literalExpectation("]", false),
        peg$c35 = function peg$c35(v) {
          return v;
        },
        peg$c36 = /^[><!]/,
        peg$c37 = peg$classExpectation([">", "<", "!"], false, false),
        peg$c38 = "=",
        peg$c39 = peg$literalExpectation("=", false),
        peg$c40 = function peg$c40(a) {
          return (a || '') + '=';
        },
        peg$c41 = /^[><]/,
        peg$c42 = peg$classExpectation([">", "<"], false, false),
        peg$c43 = ".",
        peg$c44 = peg$literalExpectation(".", false),
        peg$c45 = function peg$c45(a, as) {
          return [].concat.apply([a], as).join('');
        },
        peg$c46 = function peg$c46(name, op, value) {
          return {
            type: 'attribute',
            name: name,
            operator: op,
            value: value
          };
        },
        peg$c47 = function peg$c47(name) {
          return {
            type: 'attribute',
            name: name
          };
        },
        peg$c48 = "\"",
        peg$c49 = peg$literalExpectation("\"", false),
        peg$c50 = /^[^\\"]/,
        peg$c51 = peg$classExpectation(["\\", "\""], true, false),
        peg$c52 = "\\",
        peg$c53 = peg$literalExpectation("\\", false),
        peg$c54 = peg$anyExpectation(),
        peg$c55 = function peg$c55(a, b) {
          return a + b;
        },
        peg$c56 = function peg$c56(d) {
          return {
            type: 'literal',
            value: strUnescape(d.join(''))
          };
        },
        peg$c57 = "'",
        peg$c58 = peg$literalExpectation("'", false),
        peg$c59 = /^[^\\']/,
        peg$c60 = peg$classExpectation(["\\", "'"], true, false),
        peg$c61 = /^[0-9]/,
        peg$c62 = peg$classExpectation([["0", "9"]], false, false),
        peg$c63 = function peg$c63(a, b) {
          // Can use `a.flat().join('')` once supported
          var leadingDecimals = a ? [].concat.apply([], a).join('') : '';
          return {
            type: 'literal',
            value: parseFloat(leadingDecimals + b.join(''))
          };
        },
        peg$c64 = function peg$c64(i) {
          return {
            type: 'literal',
            value: i
          };
        },
        peg$c65 = "type(",
        peg$c66 = peg$literalExpectation("type(", false),
        peg$c67 = /^[^ )]/,
        peg$c68 = peg$classExpectation([" ", ")"], true, false),
        peg$c69 = ")",
        peg$c70 = peg$literalExpectation(")", false),
        peg$c71 = function peg$c71(t) {
          return {
            type: 'type',
            value: t.join('')
          };
        },
        peg$c72 = /^[imsu]/,
        peg$c73 = peg$classExpectation(["i", "m", "s", "u"], false, false),
        peg$c74 = "/",
        peg$c75 = peg$literalExpectation("/", false),
        peg$c76 = function peg$c76(pattern, flgs) {
          return {
            type: 'regexp',
            value: new RegExp(pattern.join(''), flgs ? flgs.join('') : '')
          };
        },
        peg$c77 = /^[^\]\\]/,
        peg$c78 = peg$classExpectation(["]", "\\"], true, false),
        peg$c79 = function peg$c79(cs) {
          return '[' + cs.join('') + ']';
        },
        peg$c80 = function peg$c80(a) {
          return '\\' + a;
        },
        peg$c81 = /^[^\/\\[]/,
        peg$c82 = peg$classExpectation(["/", "\\", "["], true, false),
        peg$c83 = function peg$c83(cs) {
          return cs.join('');
        },
        peg$c84 = function peg$c84(i, is) {
          return {
            type: 'field',
            name: is.reduce(function (memo, p) {
              return memo + p[0] + p[1];
            }, i)
          };
        },
        peg$c85 = ":not(",
        peg$c86 = peg$literalExpectation(":not(", false),
        peg$c87 = function peg$c87(ss) {
          return {
            type: 'not',
            selectors: ss
          };
        },
        peg$c88 = ":matches(",
        peg$c89 = peg$literalExpectation(":matches(", false),
        peg$c90 = function peg$c90(ss) {
          return {
            type: 'matches',
            selectors: ss
          };
        },
        peg$c91 = ":is(",
        peg$c92 = peg$literalExpectation(":is(", false),
        peg$c93 = ":has(",
        peg$c94 = peg$literalExpectation(":has(", false),
        peg$c95 = function peg$c95(ss) {
          return {
            type: 'has',
            selectors: ss
          };
        },
        peg$c96 = ":first-child",
        peg$c97 = peg$literalExpectation(":first-child", false),
        peg$c98 = function peg$c98() {
          return nth(1);
        },
        peg$c99 = ":last-child",
        peg$c100 = peg$literalExpectation(":last-child", false),
        peg$c101 = function peg$c101() {
          return nthLast(1);
        },
        peg$c102 = ":nth-child(",
        peg$c103 = peg$literalExpectation(":nth-child(", false),
        peg$c104 = function peg$c104(n) {
          return nth(parseInt(n.join(''), 10));
        },
        peg$c105 = ":nth-last-child(",
        peg$c106 = peg$literalExpectation(":nth-last-child(", false),
        peg$c107 = function peg$c107(n) {
          return nthLast(parseInt(n.join(''), 10));
        },
        peg$c108 = ":",
        peg$c109 = peg$literalExpectation(":", false),
        peg$c110 = function peg$c110(c) {
          return {
            type: 'class',
            name: c
          };
        },
        peg$currPos = 0,
        peg$posDetailsCache = [{
          line: 1,
          column: 1
        }],
        peg$maxFailPos = 0,
        peg$maxFailExpected = [],
        peg$resultsCache = {},
        peg$result;
      if ("startRule" in options) {
        if (!(options.startRule in peg$startRuleFunctions)) {
          throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
        }
        peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
      }
      function peg$literalExpectation(text, ignoreCase) {
        return {
          type: "literal",
          text: text,
          ignoreCase: ignoreCase
        };
      }
      function peg$classExpectation(parts, inverted, ignoreCase) {
        return {
          type: "class",
          parts: parts,
          inverted: inverted,
          ignoreCase: ignoreCase
        };
      }
      function peg$anyExpectation() {
        return {
          type: "any"
        };
      }
      function peg$endExpectation() {
        return {
          type: "end"
        };
      }
      function peg$computePosDetails(pos) {
        var details = peg$posDetailsCache[pos],
          p;
        if (details) {
          return details;
        } else {
          p = pos - 1;
          while (!peg$posDetailsCache[p]) {
            p--;
          }
          details = peg$posDetailsCache[p];
          details = {
            line: details.line,
            column: details.column
          };
          while (p < pos) {
            if (input.charCodeAt(p) === 10) {
              details.line++;
              details.column = 1;
            } else {
              details.column++;
            }
            p++;
          }
          peg$posDetailsCache[pos] = details;
          return details;
        }
      }
      function peg$computeLocation(startPos, endPos) {
        var startPosDetails = peg$computePosDetails(startPos),
          endPosDetails = peg$computePosDetails(endPos);
        return {
          start: {
            offset: startPos,
            line: startPosDetails.line,
            column: startPosDetails.column
          },
          end: {
            offset: endPos,
            line: endPosDetails.line,
            column: endPosDetails.column
          }
        };
      }
      function peg$fail(expected) {
        if (peg$currPos < peg$maxFailPos) {
          return;
        }
        if (peg$currPos > peg$maxFailPos) {
          peg$maxFailPos = peg$currPos;
          peg$maxFailExpected = [];
        }
        peg$maxFailExpected.push(expected);
      }
      function peg$buildStructuredError(expected, found, location) {
        return new peg$SyntaxError(peg$SyntaxError.buildMessage(expected, found), expected, found, location);
      }
      function peg$parsestart() {
        var s0, s1, s2, s3;
        var key = peg$currPos * 36 + 0,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parse_();
        if (s1 !== peg$FAILED) {
          s2 = peg$parseselectors();
          if (s2 !== peg$FAILED) {
            s3 = peg$parse_();
            if (s3 !== peg$FAILED) {
              s1 = peg$c0(s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          s1 = peg$parse_();
          if (s1 !== peg$FAILED) {
            s1 = peg$c1();
          }
          s0 = s1;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parse_() {
        var s0, s1;
        var key = peg$currPos * 36 + 1,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = [];
        if (input.charCodeAt(peg$currPos) === 32) {
          s1 = peg$c2;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c3);
          }
        }
        while (s1 !== peg$FAILED) {
          s0.push(s1);
          if (input.charCodeAt(peg$currPos) === 32) {
            s1 = peg$c2;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            {
              peg$fail(peg$c3);
            }
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseidentifierName() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 2,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = [];
        if (peg$c4.test(input.charAt(peg$currPos))) {
          s2 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          {
            peg$fail(peg$c5);
          }
        }
        if (s2 !== peg$FAILED) {
          while (s2 !== peg$FAILED) {
            s1.push(s2);
            if (peg$c4.test(input.charAt(peg$currPos))) {
              s2 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s2 = peg$FAILED;
              {
                peg$fail(peg$c5);
              }
            }
          }
        } else {
          s1 = peg$FAILED;
        }
        if (s1 !== peg$FAILED) {
          s1 = peg$c6(s1);
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsebinaryOp() {
        var s0, s1, s2, s3;
        var key = peg$currPos * 36 + 3,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parse_();
        if (s1 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 62) {
            s2 = peg$c7;
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            {
              peg$fail(peg$c8);
            }
          }
          if (s2 !== peg$FAILED) {
            s3 = peg$parse_();
            if (s3 !== peg$FAILED) {
              s1 = peg$c9();
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          s1 = peg$parse_();
          if (s1 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 126) {
              s2 = peg$c10;
              peg$currPos++;
            } else {
              s2 = peg$FAILED;
              {
                peg$fail(peg$c11);
              }
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parse_();
              if (s3 !== peg$FAILED) {
                s1 = peg$c12();
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parse_();
            if (s1 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 43) {
                s2 = peg$c13;
                peg$currPos++;
              } else {
                s2 = peg$FAILED;
                {
                  peg$fail(peg$c14);
                }
              }
              if (s2 !== peg$FAILED) {
                s3 = peg$parse_();
                if (s3 !== peg$FAILED) {
                  s1 = peg$c15();
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
            if (s0 === peg$FAILED) {
              s0 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 32) {
                s1 = peg$c2;
                peg$currPos++;
              } else {
                s1 = peg$FAILED;
                {
                  peg$fail(peg$c3);
                }
              }
              if (s1 !== peg$FAILED) {
                s2 = peg$parse_();
                if (s2 !== peg$FAILED) {
                  s1 = peg$c16();
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            }
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsehasSelectors() {
        var s0, s1, s2, s3, s4, s5, s6, s7;
        var key = peg$currPos * 36 + 4,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parsehasSelector();
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$currPos;
          s4 = peg$parse_();
          if (s4 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 44) {
              s5 = peg$c17;
              peg$currPos++;
            } else {
              s5 = peg$FAILED;
              {
                peg$fail(peg$c18);
              }
            }
            if (s5 !== peg$FAILED) {
              s6 = peg$parse_();
              if (s6 !== peg$FAILED) {
                s7 = peg$parsehasSelector();
                if (s7 !== peg$FAILED) {
                  s4 = [s4, s5, s6, s7];
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$currPos;
            s4 = peg$parse_();
            if (s4 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 44) {
                s5 = peg$c17;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                {
                  peg$fail(peg$c18);
                }
              }
              if (s5 !== peg$FAILED) {
                s6 = peg$parse_();
                if (s6 !== peg$FAILED) {
                  s7 = peg$parsehasSelector();
                  if (s7 !== peg$FAILED) {
                    s4 = [s4, s5, s6, s7];
                    s3 = s4;
                  } else {
                    peg$currPos = s3;
                    s3 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c19(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseselectors() {
        var s0, s1, s2, s3, s4, s5, s6, s7;
        var key = peg$currPos * 36 + 5,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parseselector();
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$currPos;
          s4 = peg$parse_();
          if (s4 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 44) {
              s5 = peg$c17;
              peg$currPos++;
            } else {
              s5 = peg$FAILED;
              {
                peg$fail(peg$c18);
              }
            }
            if (s5 !== peg$FAILED) {
              s6 = peg$parse_();
              if (s6 !== peg$FAILED) {
                s7 = peg$parseselector();
                if (s7 !== peg$FAILED) {
                  s4 = [s4, s5, s6, s7];
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$currPos;
            s4 = peg$parse_();
            if (s4 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 44) {
                s5 = peg$c17;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                {
                  peg$fail(peg$c18);
                }
              }
              if (s5 !== peg$FAILED) {
                s6 = peg$parse_();
                if (s6 !== peg$FAILED) {
                  s7 = peg$parseselector();
                  if (s7 !== peg$FAILED) {
                    s4 = [s4, s5, s6, s7];
                    s3 = s4;
                  } else {
                    peg$currPos = s3;
                    s3 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c19(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsehasSelector() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 6,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parsebinaryOp();
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parseselector();
          if (s2 !== peg$FAILED) {
            s1 = peg$c20(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseselector() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 7,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parsesequence();
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$currPos;
          s4 = peg$parsebinaryOp();
          if (s4 !== peg$FAILED) {
            s5 = peg$parsesequence();
            if (s5 !== peg$FAILED) {
              s4 = [s4, s5];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$currPos;
            s4 = peg$parsebinaryOp();
            if (s4 !== peg$FAILED) {
              s5 = peg$parsesequence();
              if (s5 !== peg$FAILED) {
                s4 = [s4, s5];
                s3 = s4;
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c21(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsesequence() {
        var s0, s1, s2, s3;
        var key = peg$currPos * 36 + 8,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 33) {
          s1 = peg$c22;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c23);
          }
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$parseatom();
          if (s3 !== peg$FAILED) {
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parseatom();
            }
          } else {
            s2 = peg$FAILED;
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c24(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseatom() {
        var s0;
        var key = peg$currPos * 36 + 9,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$parsewildcard();
        if (s0 === peg$FAILED) {
          s0 = peg$parseidentifier();
          if (s0 === peg$FAILED) {
            s0 = peg$parseattr();
            if (s0 === peg$FAILED) {
              s0 = peg$parsefield();
              if (s0 === peg$FAILED) {
                s0 = peg$parsenegation();
                if (s0 === peg$FAILED) {
                  s0 = peg$parsematches();
                  if (s0 === peg$FAILED) {
                    s0 = peg$parseis();
                    if (s0 === peg$FAILED) {
                      s0 = peg$parsehas();
                      if (s0 === peg$FAILED) {
                        s0 = peg$parsefirstChild();
                        if (s0 === peg$FAILED) {
                          s0 = peg$parselastChild();
                          if (s0 === peg$FAILED) {
                            s0 = peg$parsenthChild();
                            if (s0 === peg$FAILED) {
                              s0 = peg$parsenthLastChild();
                              if (s0 === peg$FAILED) {
                                s0 = peg$parseclass();
                              }
                            }
                          }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsewildcard() {
        var s0, s1;
        var key = peg$currPos * 36 + 10,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 42) {
          s1 = peg$c25;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c26);
          }
        }
        if (s1 !== peg$FAILED) {
          s1 = peg$c27(s1);
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseidentifier() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 11,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 35) {
          s1 = peg$c28;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c29);
          }
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parseidentifierName();
          if (s2 !== peg$FAILED) {
            s1 = peg$c30(s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseattr() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 12,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 91) {
          s1 = peg$c31;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c32);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parseattrValue();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 93) {
                  s5 = peg$c33;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c34);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c35(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseattrOps() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 13,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (peg$c36.test(input.charAt(peg$currPos))) {
          s1 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c37);
          }
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 61) {
            s2 = peg$c38;
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            {
              peg$fail(peg$c39);
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c40(s1);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          if (peg$c41.test(input.charAt(peg$currPos))) {
            s0 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
            {
              peg$fail(peg$c42);
            }
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseattrEqOps() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 14,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 33) {
          s1 = peg$c22;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c23);
          }
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 61) {
            s2 = peg$c38;
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            {
              peg$fail(peg$c39);
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c40(s1);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseattrName() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 15,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parseidentifierName();
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$currPos;
          if (input.charCodeAt(peg$currPos) === 46) {
            s4 = peg$c43;
            peg$currPos++;
          } else {
            s4 = peg$FAILED;
            {
              peg$fail(peg$c44);
            }
          }
          if (s4 !== peg$FAILED) {
            s5 = peg$parseidentifierName();
            if (s5 !== peg$FAILED) {
              s4 = [s4, s5];
              s3 = s4;
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          } else {
            peg$currPos = s3;
            s3 = peg$FAILED;
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            s3 = peg$currPos;
            if (input.charCodeAt(peg$currPos) === 46) {
              s4 = peg$c43;
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              {
                peg$fail(peg$c44);
              }
            }
            if (s4 !== peg$FAILED) {
              s5 = peg$parseidentifierName();
              if (s5 !== peg$FAILED) {
                s4 = [s4, s5];
                s3 = s4;
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c45(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseattrValue() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 16,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parseattrName();
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parseattrEqOps();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                s5 = peg$parsetype();
                if (s5 === peg$FAILED) {
                  s5 = peg$parseregex();
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c46(s1, s3, s5);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          s1 = peg$parseattrName();
          if (s1 !== peg$FAILED) {
            s2 = peg$parse_();
            if (s2 !== peg$FAILED) {
              s3 = peg$parseattrOps();
              if (s3 !== peg$FAILED) {
                s4 = peg$parse_();
                if (s4 !== peg$FAILED) {
                  s5 = peg$parsestring();
                  if (s5 === peg$FAILED) {
                    s5 = peg$parsenumber();
                    if (s5 === peg$FAILED) {
                      s5 = peg$parsepath();
                    }
                  }
                  if (s5 !== peg$FAILED) {
                    s1 = peg$c46(s1, s3, s5);
                    s0 = s1;
                  } else {
                    peg$currPos = s0;
                    s0 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parseattrName();
            if (s1 !== peg$FAILED) {
              s1 = peg$c47(s1);
            }
            s0 = s1;
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsestring() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 17,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 34) {
          s1 = peg$c48;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c49);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          if (peg$c50.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            {
              peg$fail(peg$c51);
            }
          }
          if (s3 === peg$FAILED) {
            s3 = peg$currPos;
            if (input.charCodeAt(peg$currPos) === 92) {
              s4 = peg$c52;
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              {
                peg$fail(peg$c53);
              }
            }
            if (s4 !== peg$FAILED) {
              if (input.length > peg$currPos) {
                s5 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                {
                  peg$fail(peg$c54);
                }
              }
              if (s5 !== peg$FAILED) {
                s4 = peg$c55(s4, s5);
                s3 = s4;
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            } else {
              peg$currPos = s3;
              s3 = peg$FAILED;
            }
          }
          while (s3 !== peg$FAILED) {
            s2.push(s3);
            if (peg$c50.test(input.charAt(peg$currPos))) {
              s3 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              {
                peg$fail(peg$c51);
              }
            }
            if (s3 === peg$FAILED) {
              s3 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 92) {
                s4 = peg$c52;
                peg$currPos++;
              } else {
                s4 = peg$FAILED;
                {
                  peg$fail(peg$c53);
                }
              }
              if (s4 !== peg$FAILED) {
                if (input.length > peg$currPos) {
                  s5 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c54);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s4 = peg$c55(s4, s5);
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            }
          }
          if (s2 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 34) {
              s3 = peg$c48;
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              {
                peg$fail(peg$c49);
              }
            }
            if (s3 !== peg$FAILED) {
              s1 = peg$c56(s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        if (s0 === peg$FAILED) {
          s0 = peg$currPos;
          if (input.charCodeAt(peg$currPos) === 39) {
            s1 = peg$c57;
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            {
              peg$fail(peg$c58);
            }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            if (peg$c59.test(input.charAt(peg$currPos))) {
              s3 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              {
                peg$fail(peg$c60);
              }
            }
            if (s3 === peg$FAILED) {
              s3 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 92) {
                s4 = peg$c52;
                peg$currPos++;
              } else {
                s4 = peg$FAILED;
                {
                  peg$fail(peg$c53);
                }
              }
              if (s4 !== peg$FAILED) {
                if (input.length > peg$currPos) {
                  s5 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c54);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s4 = peg$c55(s4, s5);
                  s3 = s4;
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              } else {
                peg$currPos = s3;
                s3 = peg$FAILED;
              }
            }
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              if (peg$c59.test(input.charAt(peg$currPos))) {
                s3 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s3 = peg$FAILED;
                {
                  peg$fail(peg$c60);
                }
              }
              if (s3 === peg$FAILED) {
                s3 = peg$currPos;
                if (input.charCodeAt(peg$currPos) === 92) {
                  s4 = peg$c52;
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  {
                    peg$fail(peg$c53);
                  }
                }
                if (s4 !== peg$FAILED) {
                  if (input.length > peg$currPos) {
                    s5 = input.charAt(peg$currPos);
                    peg$currPos++;
                  } else {
                    s5 = peg$FAILED;
                    {
                      peg$fail(peg$c54);
                    }
                  }
                  if (s5 !== peg$FAILED) {
                    s4 = peg$c55(s4, s5);
                    s3 = s4;
                  } else {
                    peg$currPos = s3;
                    s3 = peg$FAILED;
                  }
                } else {
                  peg$currPos = s3;
                  s3 = peg$FAILED;
                }
              }
            }
            if (s2 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 39) {
                s3 = peg$c57;
                peg$currPos++;
              } else {
                s3 = peg$FAILED;
                {
                  peg$fail(peg$c58);
                }
              }
              if (s3 !== peg$FAILED) {
                s1 = peg$c56(s2);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsenumber() {
        var s0, s1, s2, s3;
        var key = peg$currPos * 36 + 18,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$currPos;
        s2 = [];
        if (peg$c61.test(input.charAt(peg$currPos))) {
          s3 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s3 = peg$FAILED;
          {
            peg$fail(peg$c62);
          }
        }
        while (s3 !== peg$FAILED) {
          s2.push(s3);
          if (peg$c61.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            {
              peg$fail(peg$c62);
            }
          }
        }
        if (s2 !== peg$FAILED) {
          if (input.charCodeAt(peg$currPos) === 46) {
            s3 = peg$c43;
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            {
              peg$fail(peg$c44);
            }
          }
          if (s3 !== peg$FAILED) {
            s2 = [s2, s3];
            s1 = s2;
          } else {
            peg$currPos = s1;
            s1 = peg$FAILED;
          }
        } else {
          peg$currPos = s1;
          s1 = peg$FAILED;
        }
        if (s1 === peg$FAILED) {
          s1 = null;
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          if (peg$c61.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            {
              peg$fail(peg$c62);
            }
          }
          if (s3 !== peg$FAILED) {
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              if (peg$c61.test(input.charAt(peg$currPos))) {
                s3 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s3 = peg$FAILED;
                {
                  peg$fail(peg$c62);
                }
              }
            }
          } else {
            s2 = peg$FAILED;
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c63(s1, s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsepath() {
        var s0, s1;
        var key = peg$currPos * 36 + 19,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = peg$parseidentifierName();
        if (s1 !== peg$FAILED) {
          s1 = peg$c64(s1);
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsetype() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 20,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 5) === peg$c65) {
          s1 = peg$c65;
          peg$currPos += 5;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c66);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = [];
            if (peg$c67.test(input.charAt(peg$currPos))) {
              s4 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              {
                peg$fail(peg$c68);
              }
            }
            if (s4 !== peg$FAILED) {
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                if (peg$c67.test(input.charAt(peg$currPos))) {
                  s4 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  {
                    peg$fail(peg$c68);
                  }
                }
              }
            } else {
              s3 = peg$FAILED;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c71(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseflags() {
        var s0, s1;
        var key = peg$currPos * 36 + 21,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = [];
        if (peg$c72.test(input.charAt(peg$currPos))) {
          s1 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c73);
          }
        }
        if (s1 !== peg$FAILED) {
          while (s1 !== peg$FAILED) {
            s0.push(s1);
            if (peg$c72.test(input.charAt(peg$currPos))) {
              s1 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s1 = peg$FAILED;
              {
                peg$fail(peg$c73);
              }
            }
          }
        } else {
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseregex() {
        var s0, s1, s2, s3, s4;
        var key = peg$currPos * 36 + 22,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 47) {
          s1 = peg$c74;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c75);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          s3 = peg$parsere_character_class();
          if (s3 === peg$FAILED) {
            s3 = peg$parsere_escape();
            if (s3 === peg$FAILED) {
              s3 = peg$parsere_chars();
            }
          }
          if (s3 !== peg$FAILED) {
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsere_character_class();
              if (s3 === peg$FAILED) {
                s3 = peg$parsere_escape();
                if (s3 === peg$FAILED) {
                  s3 = peg$parsere_chars();
                }
              }
            }
          } else {
            s2 = peg$FAILED;
          }
          if (s2 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 47) {
              s3 = peg$c74;
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              {
                peg$fail(peg$c75);
              }
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parseflags();
              if (s4 === peg$FAILED) {
                s4 = null;
              }
              if (s4 !== peg$FAILED) {
                s1 = peg$c76(s2, s4);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsere_character_class() {
        var s0, s1, s2, s3;
        var key = peg$currPos * 36 + 23,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 91) {
          s1 = peg$c31;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c32);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = [];
          if (peg$c77.test(input.charAt(peg$currPos))) {
            s3 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s3 = peg$FAILED;
            {
              peg$fail(peg$c78);
            }
          }
          if (s3 === peg$FAILED) {
            s3 = peg$parsere_escape();
          }
          if (s3 !== peg$FAILED) {
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              if (peg$c77.test(input.charAt(peg$currPos))) {
                s3 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s3 = peg$FAILED;
                {
                  peg$fail(peg$c78);
                }
              }
              if (s3 === peg$FAILED) {
                s3 = peg$parsere_escape();
              }
            }
          } else {
            s2 = peg$FAILED;
          }
          if (s2 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 93) {
              s3 = peg$c33;
              peg$currPos++;
            } else {
              s3 = peg$FAILED;
              {
                peg$fail(peg$c34);
              }
            }
            if (s3 !== peg$FAILED) {
              s1 = peg$c79(s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsere_escape() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 24,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 92) {
          s1 = peg$c52;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c53);
          }
        }
        if (s1 !== peg$FAILED) {
          if (input.length > peg$currPos) {
            s2 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            {
              peg$fail(peg$c54);
            }
          }
          if (s2 !== peg$FAILED) {
            s1 = peg$c80(s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsere_chars() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 25,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        s1 = [];
        if (peg$c81.test(input.charAt(peg$currPos))) {
          s2 = input.charAt(peg$currPos);
          peg$currPos++;
        } else {
          s2 = peg$FAILED;
          {
            peg$fail(peg$c82);
          }
        }
        if (s2 !== peg$FAILED) {
          while (s2 !== peg$FAILED) {
            s1.push(s2);
            if (peg$c81.test(input.charAt(peg$currPos))) {
              s2 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s2 = peg$FAILED;
              {
                peg$fail(peg$c82);
              }
            }
          }
        } else {
          s1 = peg$FAILED;
        }
        if (s1 !== peg$FAILED) {
          s1 = peg$c83(s1);
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsefield() {
        var s0, s1, s2, s3, s4, s5, s6;
        var key = peg$currPos * 36 + 26,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 46) {
          s1 = peg$c43;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c44);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parseidentifierName();
          if (s2 !== peg$FAILED) {
            s3 = [];
            s4 = peg$currPos;
            if (input.charCodeAt(peg$currPos) === 46) {
              s5 = peg$c43;
              peg$currPos++;
            } else {
              s5 = peg$FAILED;
              {
                peg$fail(peg$c44);
              }
            }
            if (s5 !== peg$FAILED) {
              s6 = peg$parseidentifierName();
              if (s6 !== peg$FAILED) {
                s5 = [s5, s6];
                s4 = s5;
              } else {
                peg$currPos = s4;
                s4 = peg$FAILED;
              }
            } else {
              peg$currPos = s4;
              s4 = peg$FAILED;
            }
            while (s4 !== peg$FAILED) {
              s3.push(s4);
              s4 = peg$currPos;
              if (input.charCodeAt(peg$currPos) === 46) {
                s5 = peg$c43;
                peg$currPos++;
              } else {
                s5 = peg$FAILED;
                {
                  peg$fail(peg$c44);
                }
              }
              if (s5 !== peg$FAILED) {
                s6 = peg$parseidentifierName();
                if (s6 !== peg$FAILED) {
                  s5 = [s5, s6];
                  s4 = s5;
                } else {
                  peg$currPos = s4;
                  s4 = peg$FAILED;
                }
              } else {
                peg$currPos = s4;
                s4 = peg$FAILED;
              }
            }
            if (s3 !== peg$FAILED) {
              s1 = peg$c84(s2, s3);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsenegation() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 27,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 5) === peg$c85) {
          s1 = peg$c85;
          peg$currPos += 5;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c86);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parseselectors();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c87(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsematches() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 28,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 9) === peg$c88) {
          s1 = peg$c88;
          peg$currPos += 9;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c89);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parseselectors();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c90(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseis() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 29,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 4) === peg$c91) {
          s1 = peg$c91;
          peg$currPos += 4;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c92);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parseselectors();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c90(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsehas() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 30,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 5) === peg$c93) {
          s1 = peg$c93;
          peg$currPos += 5;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c94);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = peg$parsehasSelectors();
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c95(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsefirstChild() {
        var s0, s1;
        var key = peg$currPos * 36 + 31,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 12) === peg$c96) {
          s1 = peg$c96;
          peg$currPos += 12;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c97);
          }
        }
        if (s1 !== peg$FAILED) {
          s1 = peg$c98();
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parselastChild() {
        var s0, s1;
        var key = peg$currPos * 36 + 32,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 11) === peg$c99) {
          s1 = peg$c99;
          peg$currPos += 11;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c100);
          }
        }
        if (s1 !== peg$FAILED) {
          s1 = peg$c101();
        }
        s0 = s1;
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsenthChild() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 33,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 11) === peg$c102) {
          s1 = peg$c102;
          peg$currPos += 11;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c103);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = [];
            if (peg$c61.test(input.charAt(peg$currPos))) {
              s4 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              {
                peg$fail(peg$c62);
              }
            }
            if (s4 !== peg$FAILED) {
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                if (peg$c61.test(input.charAt(peg$currPos))) {
                  s4 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  {
                    peg$fail(peg$c62);
                  }
                }
              }
            } else {
              s3 = peg$FAILED;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c104(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parsenthLastChild() {
        var s0, s1, s2, s3, s4, s5;
        var key = peg$currPos * 36 + 34,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.substr(peg$currPos, 16) === peg$c105) {
          s1 = peg$c105;
          peg$currPos += 16;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c106);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parse_();
          if (s2 !== peg$FAILED) {
            s3 = [];
            if (peg$c61.test(input.charAt(peg$currPos))) {
              s4 = input.charAt(peg$currPos);
              peg$currPos++;
            } else {
              s4 = peg$FAILED;
              {
                peg$fail(peg$c62);
              }
            }
            if (s4 !== peg$FAILED) {
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                if (peg$c61.test(input.charAt(peg$currPos))) {
                  s4 = input.charAt(peg$currPos);
                  peg$currPos++;
                } else {
                  s4 = peg$FAILED;
                  {
                    peg$fail(peg$c62);
                  }
                }
              }
            } else {
              s3 = peg$FAILED;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parse_();
              if (s4 !== peg$FAILED) {
                if (input.charCodeAt(peg$currPos) === 41) {
                  s5 = peg$c69;
                  peg$currPos++;
                } else {
                  s5 = peg$FAILED;
                  {
                    peg$fail(peg$c70);
                  }
                }
                if (s5 !== peg$FAILED) {
                  s1 = peg$c107(s3);
                  s0 = s1;
                } else {
                  peg$currPos = s0;
                  s0 = peg$FAILED;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$FAILED;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$FAILED;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function peg$parseclass() {
        var s0, s1, s2;
        var key = peg$currPos * 36 + 35,
          cached = peg$resultsCache[key];
        if (cached) {
          peg$currPos = cached.nextPos;
          return cached.result;
        }
        s0 = peg$currPos;
        if (input.charCodeAt(peg$currPos) === 58) {
          s1 = peg$c108;
          peg$currPos++;
        } else {
          s1 = peg$FAILED;
          {
            peg$fail(peg$c109);
          }
        }
        if (s1 !== peg$FAILED) {
          s2 = peg$parseidentifierName();
          if (s2 !== peg$FAILED) {
            s1 = peg$c110(s2);
            s0 = s1;
          } else {
            peg$currPos = s0;
            s0 = peg$FAILED;
          }
        } else {
          peg$currPos = s0;
          s0 = peg$FAILED;
        }
        peg$resultsCache[key] = {
          nextPos: peg$currPos,
          result: s0
        };
        return s0;
      }
      function nth(n) {
        return {
          type: 'nth-child',
          index: {
            type: 'literal',
            value: n
          }
        };
      }
      function nthLast(n) {
        return {
          type: 'nth-last-child',
          index: {
            type: 'literal',
            value: n
          }
        };
      }
      function strUnescape(s) {
        return s.replace(/\\(.)/g, function (match, ch) {
          switch (ch) {
            case 'b':
              return '\b';
            case 'f':
              return '\f';
            case 'n':
              return '\n';
            case 'r':
              return '\r';
            case 't':
              return '\t';
            case 'v':
              return '\v';
            default:
              return ch;
          }
        });
      }
      peg$result = peg$startRuleFunction();
      if (peg$result !== peg$FAILED && peg$currPos === input.length) {
        return peg$result;
      } else {
        if (peg$result !== peg$FAILED && peg$currPos < input.length) {
          peg$fail(peg$endExpectation());
        }
        throw peg$buildStructuredError(peg$maxFailExpected, peg$maxFailPos < input.length ? input.charAt(peg$maxFailPos) : null, peg$maxFailPos < input.length ? peg$computeLocation(peg$maxFailPos, peg$maxFailPos + 1) : peg$computeLocation(peg$maxFailPos, peg$maxFailPos));
      }
    }
    return {
      SyntaxError: peg$SyntaxError,
      parse: peg$parse
    };
  });
});

/**
* @typedef {"LEFT_SIDE"|"RIGHT_SIDE"} Side
*/

var LEFT_SIDE = 'LEFT_SIDE';
var RIGHT_SIDE = 'RIGHT_SIDE';

/**
 * @external AST
 * @see https://esprima.readthedocs.io/en/latest/syntax-tree-format.html
 */

/**
 * One of the rules of `grammar.pegjs`
 * @typedef {PlainObject} SelectorAST
 * @see grammar.pegjs
*/

/**
 * The `sequence` production of `grammar.pegjs`
 * @typedef {PlainObject} SelectorSequenceAST
*/

/**
 * Get the value of a property which may be multiple levels down
 * in the object.
 * @param {?PlainObject} obj
 * @param {string[]} keys
 * @returns {undefined|boolean|string|number|external:AST}
 */
function getPath(obj, keys) {
  for (var i = 0; i < keys.length; ++i) {
    if (obj == null) {
      return obj;
    }
    obj = obj[keys[i]];
  }
  return obj;
}

/**
 * Determine whether `node` can be reached by following `path`,
 * starting at `ancestor`.
 * @param {?external:AST} node
 * @param {?external:AST} ancestor
 * @param {string[]} path
 * @param {Integer} fromPathIndex
 * @returns {boolean}
 */
function inPath(node, ancestor, path, fromPathIndex) {
  var current = ancestor;
  for (var i = fromPathIndex; i < path.length; ++i) {
    if (current == null) {
      return false;
    }
    var field = current[path[i]];
    if (Array.isArray(field)) {
      for (var k = 0; k < field.length; ++k) {
        if (inPath(node, field[k], path, i + 1)) {
          return true;
        }
      }
      return false;
    }
    current = field;
  }
  return node === current;
}

/**
 * A generated matcher function for a selector.
 * @callback SelectorMatcher
 * @param {?SelectorAST} selector
 * @param {external:AST[]} [ancestry=[]]
 * @param {ESQueryOptions} [options]
 * @returns {void}
*/

/**
 * A WeakMap for holding cached matcher functions for selectors.
 * @type {WeakMap<SelectorAST, SelectorMatcher>}
*/
var MATCHER_CACHE = typeof WeakMap === 'function' ? new WeakMap() : null;

/**
 * Look up a matcher function for `selector` in the cache.
 * If it does not exist, generate it with `generateMatcher` and add it to the cache.
 * In engines without WeakMap, the caching is skipped and matchers are generated with every call.
 * @param {?SelectorAST} selector
 * @returns {SelectorMatcher}
 */
function getMatcher(selector) {
  if (selector == null) {
    return function () {
      return true;
    };
  }
  if (MATCHER_CACHE != null) {
    var matcher = MATCHER_CACHE.get(selector);
    if (matcher != null) {
      return matcher;
    }
    matcher = generateMatcher(selector);
    MATCHER_CACHE.set(selector, matcher);
    return matcher;
  }
  return generateMatcher(selector);
}

/**
 * Create a matcher function for `selector`,
 * @param {?SelectorAST} selector
 * @returns {SelectorMatcher}
 */
function generateMatcher(selector) {
  switch (selector.type) {
    case 'wildcard':
      return function () {
        return true;
      };
    case 'identifier':
      {
        var value = selector.value.toLowerCase();
        return function (node, ancestry, options) {
          var nodeTypeKey = options && options.nodeTypeKey || 'type';
          return value === node[nodeTypeKey].toLowerCase();
        };
      }
    case 'exactNode':
      return function (node, ancestry) {
        return ancestry.length === 0;
      };
    case 'field':
      {
        var path = selector.name.split('.');
        return function (node, ancestry) {
          var ancestor = ancestry[path.length - 1];
          return inPath(node, ancestor, path, 0);
        };
      }
    case 'matches':
      {
        var matchers = selector.selectors.map(getMatcher);
        return function (node, ancestry, options) {
          for (var i = 0; i < matchers.length; ++i) {
            if (matchers[i](node, ancestry, options)) {
              return true;
            }
          }
          return false;
        };
      }
    case 'compound':
      {
        var _matchers = selector.selectors.map(getMatcher);
        return function (node, ancestry, options) {
          for (var i = 0; i < _matchers.length; ++i) {
            if (!_matchers[i](node, ancestry, options)) {
              return false;
            }
          }
          return true;
        };
      }
    case 'not':
      {
        var _matchers2 = selector.selectors.map(getMatcher);
        return function (node, ancestry, options) {
          for (var i = 0; i < _matchers2.length; ++i) {
            if (_matchers2[i](node, ancestry, options)) {
              return false;
            }
          }
          return true;
        };
      }
    case 'has':
      {
        var _matchers3 = selector.selectors.map(getMatcher);
        return function (node, ancestry, options) {
          var result = false;
          var a = [];
          estraverse.traverse(node, {
            enter: function enter(node, parent) {
              if (parent != null) {
                a.unshift(parent);
              }
              for (var i = 0; i < _matchers3.length; ++i) {
                if (_matchers3[i](node, a, options)) {
                  result = true;
                  this["break"]();
                  return;
                }
              }
            },
            leave: function leave() {
              a.shift();
            },
            keys: options && options.visitorKeys,
            fallback: options && options.fallback || 'iteration'
          });
          return result;
        };
      }
    case 'child':
      {
        var left = getMatcher(selector.left);
        var right = getMatcher(selector.right);
        return function (node, ancestry, options) {
          if (ancestry.length > 0 && right(node, ancestry, options)) {
            return left(ancestry[0], ancestry.slice(1), options);
          }
          return false;
        };
      }
    case 'descendant':
      {
        var _left = getMatcher(selector.left);
        var _right = getMatcher(selector.right);
        return function (node, ancestry, options) {
          if (_right(node, ancestry, options)) {
            for (var i = 0, l = ancestry.length; i < l; ++i) {
              if (_left(ancestry[i], ancestry.slice(i + 1), options)) {
                return true;
              }
            }
          }
          return false;
        };
      }
    case 'attribute':
      {
        var _path = selector.name.split('.');
        switch (selector.operator) {
          case void 0:
            return function (node) {
              return getPath(node, _path) != null;
            };
          case '=':
            switch (selector.value.type) {
              case 'regexp':
                return function (node) {
                  var p = getPath(node, _path);
                  return typeof p === 'string' && selector.value.value.test(p);
                };
              case 'literal':
                {
                  var literal = "".concat(selector.value.value);
                  return function (node) {
                    return literal === "".concat(getPath(node, _path));
                  };
                }
              case 'type':
                return function (node) {
                  return selector.value.value === _typeof(getPath(node, _path));
                };
            }
            throw new Error("Unknown selector value type: ".concat(selector.value.type));
          case '!=':
            switch (selector.value.type) {
              case 'regexp':
                return function (node) {
                  return !selector.value.value.test(getPath(node, _path));
                };
              case 'literal':
                {
                  var _literal = "".concat(selector.value.value);
                  return function (node) {
                    return _literal !== "".concat(getPath(node, _path));
                  };
                }
              case 'type':
                return function (node) {
                  return selector.value.value !== _typeof(getPath(node, _path));
                };
            }
            throw new Error("Unknown selector value type: ".concat(selector.value.type));
          case '<=':
            return function (node) {
              return getPath(node, _path) <= selector.value.value;
            };
          case '<':
            return function (node) {
              return getPath(node, _path) < selector.value.value;
            };
          case '>':
            return function (node) {
              return getPath(node, _path) > selector.value.value;
            };
          case '>=':
            return function (node) {
              return getPath(node, _path) >= selector.value.value;
            };
        }
        throw new Error("Unknown operator: ".concat(selector.operator));
      }
    case 'sibling':
      {
        var _left2 = getMatcher(selector.left);
        var _right2 = getMatcher(selector.right);
        return function (node, ancestry, options) {
          return _right2(node, ancestry, options) && sibling(node, _left2, ancestry, LEFT_SIDE, options) || selector.left.subject && _left2(node, ancestry, options) && sibling(node, _right2, ancestry, RIGHT_SIDE, options);
        };
      }
    case 'adjacent':
      {
        var _left3 = getMatcher(selector.left);
        var _right3 = getMatcher(selector.right);
        return function (node, ancestry, options) {
          return _right3(node, ancestry, options) && adjacent(node, _left3, ancestry, LEFT_SIDE, options) || selector.right.subject && _left3(node, ancestry, options) && adjacent(node, _right3, ancestry, RIGHT_SIDE, options);
        };
      }
    case 'nth-child':
      {
        var nth = selector.index.value;
        var _right4 = getMatcher(selector.right);
        return function (node, ancestry, options) {
          return _right4(node, ancestry, options) && nthChild(node, ancestry, nth, options);
        };
      }
    case 'nth-last-child':
      {
        var _nth = -selector.index.value;
        var _right5 = getMatcher(selector.right);
        return function (node, ancestry, options) {
          return _right5(node, ancestry, options) && nthChild(node, ancestry, _nth, options);
        };
      }
    case 'class':
      {
        var name = selector.name.toLowerCase();
        return function (node, ancestry, options) {
          if (options && options.matchClass) {
            return options.matchClass(selector.name, node, ancestry);
          }
          if (options && options.nodeTypeKey) return false;
          switch (name) {
            case 'statement':
              if (node.type.slice(-9) === 'Statement') return true;
            // fallthrough: interface Declaration <: Statement { }
            case 'declaration':
              return node.type.slice(-11) === 'Declaration';
            case 'pattern':
              if (node.type.slice(-7) === 'Pattern') return true;
            // fallthrough: interface Expression <: Node, Pattern { }
            case 'expression':
              return node.type.slice(-10) === 'Expression' || node.type.slice(-7) === 'Literal' || node.type === 'Identifier' && (ancestry.length === 0 || ancestry[0].type !== 'MetaProperty') || node.type === 'MetaProperty';
            case 'function':
              return node.type === 'FunctionDeclaration' || node.type === 'FunctionExpression' || node.type === 'ArrowFunctionExpression';
          }
          throw new Error("Unknown class name: ".concat(selector.name));
        };
      }
  }
  throw new Error("Unknown selector type: ".concat(selector.type));
}

/**
 * @callback TraverseOptionFallback
 * @param {external:AST} node The given node.
 * @returns {string[]} An array of visitor keys for the given node.
 */

/**
 * @callback ClassMatcher
 * @param {string} className The name of the class to match.
 * @param {external:AST} node The node to match against.
 * @param {Array<external:AST>} ancestry The ancestry of the node.
 * @returns {boolean} True if the node matches the class, false if not.
 */

/**
 * @typedef {object} ESQueryOptions
 * @property {string} [nodeTypeKey="type"] By passing `nodeTypeKey`, we can allow other ASTs to use ESQuery.
 * @property { { [nodeType: string]: string[] } } [visitorKeys] By passing `visitorKeys` mapping, we can extend the properties of the nodes that traverse the node.
 * @property {TraverseOptionFallback} [fallback] By passing `fallback` option, we can control the properties of traversing nodes when encountering unknown nodes.
 * @property {ClassMatcher} [matchClass] By passing `matchClass` option, we can customize the interpretation of classes.
 */

/**
 * Given a `node` and its ancestors, determine if `node` is matched
 * by `selector`.
 * @param {?external:AST} node
 * @param {?SelectorAST} selector
 * @param {external:AST[]} [ancestry=[]]
 * @param {ESQueryOptions} [options]
 * @throws {Error} Unknowns (operator, class name, selector type, or
 * selector value type)
 * @returns {boolean}
 */
function matches(node, selector, ancestry, options) {
  if (!selector) {
    return true;
  }
  if (!node) {
    return false;
  }
  if (!ancestry) {
    ancestry = [];
  }
  return getMatcher(selector)(node, ancestry, options);
}

/**
 * Get visitor keys of a given node.
 * @param {external:AST} node The AST node to get keys.
 * @param {ESQueryOptions|undefined} options
 * @returns {string[]} Visitor keys of the node.
 */
function getVisitorKeys(node, options) {
  var nodeTypeKey = options && options.nodeTypeKey || 'type';
  var nodeType = node[nodeTypeKey];
  if (options && options.visitorKeys && options.visitorKeys[nodeType]) {
    return options.visitorKeys[nodeType];
  }
  if (estraverse.VisitorKeys[nodeType]) {
    return estraverse.VisitorKeys[nodeType];
  }
  if (options && typeof options.fallback === 'function') {
    return options.fallback(node);
  }
  // 'iteration' fallback
  return Object.keys(node).filter(function (key) {
    return key !== nodeTypeKey;
  });
}

/**
 * Check whether the given value is an ASTNode or not.
 * @param {any} node The value to check.
 * @param {ESQueryOptions|undefined} options The options to use.
 * @returns {boolean} `true` if the value is an ASTNode.
 */
function isNode(node, options) {
  var nodeTypeKey = options && options.nodeTypeKey || 'type';
  return node !== null && _typeof(node) === 'object' && typeof node[nodeTypeKey] === 'string';
}

/**
 * Determines if the given node has a sibling that matches the
 * given selector matcher.
 * @param {external:AST} node
 * @param {SelectorMatcher} matcher
 * @param {external:AST[]} ancestry
 * @param {Side} side
 * @param {ESQueryOptions|undefined} options
 * @returns {boolean}
 */
function sibling(node, matcher, ancestry, side, options) {
  var _ancestry = _slicedToArray(ancestry, 1),
    parent = _ancestry[0];
  if (!parent) {
    return false;
  }
  var keys = getVisitorKeys(parent, options);
  for (var i = 0; i < keys.length; ++i) {
    var listProp = parent[keys[i]];
    if (Array.isArray(listProp)) {
      var startIndex = listProp.indexOf(node);
      if (startIndex < 0) {
        continue;
      }
      var lowerBound = void 0,
        upperBound = void 0;
      if (side === LEFT_SIDE) {
        lowerBound = 0;
        upperBound = startIndex;
      } else {
        lowerBound = startIndex + 1;
        upperBound = listProp.length;
      }
      for (var k = lowerBound; k < upperBound; ++k) {
        if (isNode(listProp[k], options) && matcher(listProp[k], ancestry, options)) {
          return true;
        }
      }
    }
  }
  return false;
}

/**
 * Determines if the given node has an adjacent sibling that matches
 * the given selector matcher.
 * @param {external:AST} node
 * @param {SelectorMatcher} matcher
 * @param {external:AST[]} ancestry
 * @param {Side} side
 * @param {ESQueryOptions|undefined} options
 * @returns {boolean}
 */
function adjacent(node, matcher, ancestry, side, options) {
  var _ancestry2 = _slicedToArray(ancestry, 1),
    parent = _ancestry2[0];
  if (!parent) {
    return false;
  }
  var keys = getVisitorKeys(parent, options);
  for (var i = 0; i < keys.length; ++i) {
    var listProp = parent[keys[i]];
    if (Array.isArray(listProp)) {
      var idx = listProp.indexOf(node);
      if (idx < 0) {
        continue;
      }
      if (side === LEFT_SIDE && idx > 0 && isNode(listProp[idx - 1], options) && matcher(listProp[idx - 1], ancestry, options)) {
        return true;
      }
      if (side === RIGHT_SIDE && idx < listProp.length - 1 && isNode(listProp[idx + 1], options) && matcher(listProp[idx + 1], ancestry, options)) {
        return true;
      }
    }
  }
  return false;
}

/**
 * Determines if the given node is the `nth` child.
 * If `nth` is negative then the position is counted
 * from the end of the list of children.
 * @param {external:AST} node
 * @param {external:AST[]} ancestry
 * @param {Integer} nth
 * @param {ESQueryOptions|undefined} options
 * @returns {boolean}
 */
function nthChild(node, ancestry, nth, options) {
  if (nth === 0) {
    return false;
  }
  var _ancestry3 = _slicedToArray(ancestry, 1),
    parent = _ancestry3[0];
  if (!parent) {
    return false;
  }
  var keys = getVisitorKeys(parent, options);
  for (var i = 0; i < keys.length; ++i) {
    var listProp = parent[keys[i]];
    if (Array.isArray(listProp)) {
      var idx = nth < 0 ? listProp.length + nth : nth - 1;
      if (idx >= 0 && idx < listProp.length && listProp[idx] === node) {
        return true;
      }
    }
  }
  return false;
}

/**
 * For each selector node marked as a subject, find the portion of the
 * selector that the subject must match.
 * @param {SelectorAST} selector
 * @param {SelectorAST} [ancestor] Defaults to `selector`
 * @returns {SelectorAST[]}
 */
function subjects(selector, ancestor) {
  if (selector == null || _typeof(selector) != 'object') {
    return [];
  }
  if (ancestor == null) {
    ancestor = selector;
  }
  var results = selector.subject ? [ancestor] : [];
  var keys = Object.keys(selector);
  for (var i = 0; i < keys.length; ++i) {
    var p = keys[i];
    var sel = selector[p];
    results.push.apply(results, _toConsumableArray(subjects(sel, p === 'left' ? sel : ancestor)));
  }
  return results;
}

/**
* @callback TraverseVisitor
* @param {?external:AST} node
* @param {?external:AST} parent
* @param {external:AST[]} ancestry
*/

/**
 * From a JS AST and a selector AST, collect all JS AST nodes that
 * match the selector.
 * @param {external:AST} ast
 * @param {?SelectorAST} selector
 * @param {TraverseVisitor} visitor
 * @param {ESQueryOptions} [options]
 * @returns {external:AST[]}
 */
function traverse(ast, selector, visitor, options) {
  if (!selector) {
    return;
  }
  var ancestry = [];
  var matcher = getMatcher(selector);
  var altSubjects = subjects(selector).map(getMatcher);
  estraverse.traverse(ast, {
    enter: function enter(node, parent) {
      if (parent != null) {
        ancestry.unshift(parent);
      }
      if (matcher(node, ancestry, options)) {
        if (altSubjects.length) {
          for (var i = 0, l = altSubjects.length; i < l; ++i) {
            if (altSubjects[i](node, ancestry, options)) {
              visitor(node, parent, ancestry);
            }
            for (var k = 0, m = ancestry.length; k < m; ++k) {
              var succeedingAncestry = ancestry.slice(k + 1);
              if (altSubjects[i](ancestry[k], succeedingAncestry, options)) {
                visitor(ancestry[k], parent, succeedingAncestry);
              }
            }
          }
        } else {
          visitor(node, parent, ancestry);
        }
      }
    },
    leave: function leave() {
      ancestry.shift();
    },
    keys: options && options.visitorKeys,
    fallback: options && options.fallback || 'iteration'
  });
}

/**
 * From a JS AST and a selector AST, collect all JS AST nodes that
 * match the selector.
 * @param {external:AST} ast
 * @param {?SelectorAST} selector
 * @param {ESQueryOptions} [options]
 * @returns {external:AST[]}
 */
function match(ast, selector, options) {
  var results = [];
  traverse(ast, selector, function (node) {
    results.push(node);
  }, options);
  return results;
}

/**
 * Parse a selector string and return its AST.
 * @param {string} selector
 * @returns {SelectorAST}
 */
function parse(selector) {
  return parser.parse(selector);
}

/**
 * Query the code AST using the selector string.
 * @param {external:AST} ast
 * @param {string} selector
 * @param {ESQueryOptions} [options]
 * @returns {external:AST[]}
 */
function query(ast, selector, options) {
  return match(ast, parse(selector), options);
}
query.parse = parse;
query.match = match;
query.traverse = traverse;
query.matches = matches;
query.query = query;

export default query;
