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Just roll out to undefined in that case.\n      if (hasOwnProp(_item, part)) {\n        _item = _item[part];\n      } else {\n        return undefined;\n      }\n    }\n\n    return _item;\n  };\n}\n\nfunction groupBy(obj, val, throwOnUndefined) {\n  const result = {};\n  const iterator = isFunction(val) ? val : getAttrGetter(val);\n  for (let i = 0; i < obj.length; i++) {\n    const value = obj[i];\n    const key = iterator(value, i);\n    if (key === undefined && throwOnUndefined === true) {\n      throw new TypeError(`groupby: attribute \"${val}\" resolved to undefined`);\n    }\n    (result[key] || (result[key] = [])).push(value);\n  }\n  return result;\n}\n\nexports.groupBy = groupBy;\n\nfunction toArray(obj) {\n  return Array.prototype.slice.call(obj);\n}\n\nexports.toArray = toArray;\n\nfunction without(array) {\n  const result = [];\n  if (!array) {\n    return result;\n  }\n  const length = array.length;\n  const contains = toArray(arguments).slice(1);\n  let index = -1;\n\n  while (++index < length) {\n    if (indexOf(contains, array[index]) === -1) {\n      result.push(array[index]);\n    }\n  }\n  return result;\n}\n\nexports.without = without;\n\nfunction repeat(char_, n) {\n  var str = '';\n  for (let i = 0; i < n; i++) {\n    str += char_;\n  }\n  return str;\n}\n\nexports.repeat = repeat;\n\nfunction each(obj, func, context) {\n  if (obj == null) {\n    return;\n  }\n\n  if (ArrayProto.forEach && obj.forEach === ArrayProto.forEach) {\n    obj.forEach(func, context);\n  } else if (obj.length === +obj.length) {\n    for (let i = 0, l = obj.length; i < l; i++) {\n      func.call(context, obj[i], i, obj);\n    }\n  }\n}\n\nexports.each = each;\n\nfunction map(obj, func) {\n  var results = [];\n  if (obj == null) {\n    return results;\n  }\n\n  if (ArrayProto.map && obj.map === ArrayProto.map) {\n    return obj.map(func);\n  }\n\n  for (let i = 0; i < obj.length; i++) {\n    results[results.length] = func(obj[i], i);\n  }\n\n  if (obj.length === +obj.length) {\n    results.length = obj.length;\n  }\n\n  return results;\n}\n\nexports.map = map;\n\nfunction asyncIter(arr, iter, cb) {\n  let i = -1;\n\n  function next() {\n    i++;\n\n    if (i < arr.length) {\n      iter(arr[i], i, next, cb);\n    } else {\n      cb();\n    }\n  }\n\n  next();\n}\n\nexports.asyncIter = asyncIter;\n\nfunction asyncFor(obj, iter, cb) {\n  const keys = keys_(obj || {});\n  const len = keys.length;\n  let i = -1;\n\n  function next() {\n    i++;\n    const k = keys[i];\n\n    if (i < len) {\n      iter(k, obj[k], i, len, next);\n    } else {\n      cb();\n    }\n  }\n\n  next();\n}\n\nexports.asyncFor = asyncFor;\n\nfunction indexOf(arr, searchElement, fromIndex) {\n  return Array.prototype.indexOf.call(arr || [], searchElement, fromIndex);\n}\n\nexports.indexOf = indexOf;\n\nfunction keys_(obj) {\n  /* eslint-disable no-restricted-syntax */\n  const arr = [];\n  for (let k in obj) {\n    if (hasOwnProp(obj, k)) {\n      arr.push(k);\n    }\n  }\n  return arr;\n}\n\nexports.keys = keys_;\n\nfunction _entries(obj) {\n  return keys_(obj).map((k) => [k, obj[k]]);\n}\n\nexports._entries = _entries;\n\nfunction _values(obj) {\n  return keys_(obj).map((k) => obj[k]);\n}\n\nexports._values = _values;\n\nfunction extend(obj1, obj2) {\n  obj1 = obj1 || {};\n  keys_(obj2).forEach(k => {\n    obj1[k] = obj2[k];\n  });\n  return obj1;\n}\n\nexports._assign = exports.extend = extend;\n\nfunction inOperator(key, val) {\n  if (isArray(val) || isString(val)) {\n    return val.indexOf(key) !== -1;\n  } else if (isObject(val)) {\n    return key in val;\n  }\n  throw new Error('Cannot use \"in\" operator to search for \"'\n    + key + '\" in unexpected types.');\n}\n\nexports.inOperator = inOperator;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/lib.js","'use strict';\n\n// A simple class system, more documentation to come\nconst EventEmitter = require('events');\nconst lib = require('./lib');\n\nfunction parentWrap(parent, prop) {\n  if (typeof parent !== 'function' || typeof prop !== 'function') {\n    return prop;\n  }\n  return function wrap() {\n    // Save the current parent method\n    const tmp = this.parent;\n\n    // Set parent to the previous method, call, and restore\n    this.parent = parent;\n    const res = prop.apply(this, arguments);\n    this.parent = tmp;\n\n    return res;\n  };\n}\n\nfunction extendClass(cls, name, props) {\n  props = props || {};\n\n  lib.keys(props).forEach(k => {\n    props[k] = parentWrap(cls.prototype[k], props[k]);\n  });\n\n  class subclass extends cls {\n    get typename() {\n      return name;\n    }\n  }\n\n  lib._assign(subclass.prototype, props);\n\n  return subclass;\n}\n\nclass Obj {\n  constructor(...args) {\n    // Unfortunately necessary for backwards compatibility\n    this.init(...args);\n  }\n\n  init() {}\n\n  get typename() {\n    return this.constructor.name;\n  }\n\n  static extend(name, props) {\n    if (typeof name === 'object') {\n      props = name;\n      name = 'anonymous';\n    }\n    return extendClass(this, name, props);\n  }\n}\n\nclass EmitterObj extends EventEmitter {\n  constructor(...args) {\n    super();\n    // Unfortunately necessary for backwards compatibility\n    this.init(...args);\n  }\n\n  init() {}\n\n  get typename() {\n    return this.constructor.name;\n  }\n\n  static extend(name, props) {\n    if (typeof name === 'object') {\n      props = name;\n      name = 'anonymous';\n    }\n    return extendClass(this, name, props);\n  }\n}\n\nmodule.exports = { Obj, EmitterObj };\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/object.js","'use strict';\n\nvar lib = require('./lib');\nvar arrayFrom = Array.from;\nvar supportsIterators = (\n  typeof Symbol === 'function' && Symbol.iterator && typeof arrayFrom === 'function'\n);\n\n\n// Frames keep track of scoping both at compile-time and run-time so\n// we know how to access variables. Block tags can introduce special\n// variables, for example.\nclass Frame {\n  constructor(parent, isolateWrites) {\n    this.variables = {};\n    this.parent = parent;\n    this.topLevel = false;\n    // if this is true, writes (set) should never propagate upwards past\n    // this frame to its parent (though reads may).\n    this.isolateWrites = isolateWrites;\n  }\n\n  set(name, val, resolveUp) {\n    // Allow variables with dots by automatically creating the\n    // nested structure\n    var parts = name.split('.');\n    var obj = this.variables;\n    var frame = this;\n\n    if (resolveUp) {\n      if ((frame = this.resolve(parts[0], true))) {\n        frame.set(name, val);\n        return;\n      }\n    }\n\n    for (let i = 0; i < parts.length - 1; i++) {\n      const id = parts[i];\n\n      if (!obj[id]) {\n        obj[id] = {};\n      }\n      obj = obj[id];\n    }\n\n    obj[parts[parts.length - 1]] = val;\n  }\n\n  get(name) {\n    var val = this.variables[name];\n    if (val !== undefined) {\n      return val;\n    }\n    return null;\n  }\n\n  lookup(name) {\n    var p = this.parent;\n    var val = this.variables[name];\n    if (val !== undefined) {\n      return val;\n    }\n    return p && p.lookup(name);\n  }\n\n  resolve(name, forWrite) {\n    var p = (forWrite && this.isolateWrites) ? undefined : this.parent;\n    var val = this.variables[name];\n    if (val !== undefined) {\n      return this;\n    }\n    return p && p.resolve(name);\n  }\n\n  push(isolateWrites) {\n    return new Frame(this, isolateWrites);\n  }\n\n  pop() {\n    return this.parent;\n  }\n}\n\nfunction makeMacro(argNames, kwargNames, func) {\n  return (...macroArgs) => {\n    var argCount = numArgs(macroArgs);\n    var args;\n    var kwargs = getKeywordArgs(macroArgs);\n\n    if (argCount > argNames.length) {\n      args = macroArgs.slice(0, argNames.length);\n\n      // Positional arguments that should be passed in as\n      // keyword arguments (essentially default values)\n      macroArgs.slice(args.length, argCount).forEach((val, i) => {\n        if (i < kwargNames.length) {\n          kwargs[kwargNames[i]] = val;\n        }\n      });\n      args.push(kwargs);\n    } else if (argCount < argNames.length) {\n      args = macroArgs.slice(0, argCount);\n\n      for (let i = argCount; i < argNames.length; i++) {\n        const arg = argNames[i];\n\n        // Keyword arguments that should be passed as\n        // positional arguments, i.e. the caller explicitly\n        // used the name of a positional arg\n        args.push(kwargs[arg]);\n        delete kwargs[arg];\n      }\n      args.push(kwargs);\n    } else {\n      args = macroArgs;\n    }\n\n    return func.apply(this, args);\n  };\n}\n\nfunction makeKeywordArgs(obj) {\n  obj.__keywords = true;\n  return obj;\n}\n\nfunction isKeywordArgs(obj) {\n  return obj && Object.prototype.hasOwnProperty.call(obj, '__keywords');\n}\n\nfunction getKeywordArgs(args) {\n  var len = args.length;\n  if (len) {\n    const lastArg = args[len - 1];\n    if (isKeywordArgs(lastArg)) {\n      return lastArg;\n    }\n  }\n  return {};\n}\n\nfunction numArgs(args) {\n  var len = args.length;\n  if (len === 0) {\n    return 0;\n  }\n\n  const lastArg = args[len - 1];\n  if (isKeywordArgs(lastArg)) {\n    return len - 1;\n  } else {\n    return len;\n  }\n}\n\n// A SafeString object indicates that the string should not be\n// autoescaped. This happens magically because autoescaping only\n// occurs on primitive string objects.\nfunction SafeString(val) {\n  if (typeof val !== 'string') {\n    return val;\n  }\n\n  this.val = val;\n  this.length = val.length;\n}\n\nSafeString.prototype = Object.create(String.prototype, {\n  length: {\n    writable: true,\n    configurable: true,\n    value: 0\n  }\n});\nSafeString.prototype.valueOf = function valueOf() {\n  return this.val;\n};\nSafeString.prototype.toString = function toString() {\n  return this.val;\n};\n\nfunction copySafeness(dest, target) {\n  if (dest instanceof SafeString) {\n    return new SafeString(target);\n  }\n  return target.toString();\n}\n\nfunction markSafe(val) {\n  var type = typeof val;\n\n  if (type === 'string') {\n    return new SafeString(val);\n  } else if (type !== 'function') {\n    return val;\n  } else {\n    return function wrapSafe(args) {\n      var ret = val.apply(this, arguments);\n\n      if (typeof ret === 'string') {\n        return new SafeString(ret);\n      }\n\n      return ret;\n    };\n  }\n}\n\nfunction suppressValue(val, autoescape) {\n  val = (val !== undefined && val !== null) ? val : '';\n\n  if (autoescape && !(val instanceof SafeString)) {\n    val = lib.escape(val.toString());\n  }\n\n  return val;\n}\n\nfunction ensureDefined(val, lineno, colno) {\n  if (val === null || val === undefined) {\n    throw new lib.TemplateError(\n      'attempted to output null or undefined value',\n      lineno + 1,\n      colno + 1\n    );\n  }\n  return val;\n}\n\nfunction memberLookup(obj, val) {\n  if (obj === undefined || obj === null) {\n    return undefined;\n  }\n\n  if (typeof obj[val] === 'function') {\n    return (...args) => obj[val].apply(obj, args);\n  }\n\n  return obj[val];\n}\n\nfunction callWrap(obj, name, context, args) {\n  if (!obj) {\n    throw new Error('Unable to call `' + name + '`, which is undefined or falsey');\n  } else if (typeof obj !== 'function') {\n    throw new Error('Unable to call `' + name + '`, which is not a function');\n  }\n\n  return obj.apply(context, args);\n}\n\nfunction contextOrFrameLookup(context, frame, name) {\n  var val = frame.lookup(name);\n  return (val !== undefined) ?\n    val :\n    context.lookup(name);\n}\n\nfunction handleError(error, lineno, colno) {\n  if (error.lineno) {\n    return error;\n  } else {\n    return new lib.TemplateError(error, lineno, colno);\n  }\n}\n\nfunction asyncEach(arr, dimen, iter, cb) {\n  if (lib.isArray(arr)) {\n    const len = arr.length;\n\n    lib.asyncIter(arr, function iterCallback(item, i, next) {\n      switch (dimen) {\n        case 1:\n          iter(item, i, len, next);\n          break;\n        case 2:\n          iter(item[0], item[1], i, len, next);\n          break;\n        case 3:\n          iter(item[0], item[1], item[2], i, len, next);\n          break;\n        default:\n          item.push(i, len, next);\n          iter.apply(this, item);\n      }\n    }, cb);\n  } else {\n    lib.asyncFor(arr, function iterCallback(key, val, i, len, next) {\n      iter(key, val, i, len, next);\n    }, cb);\n  }\n}\n\nfunction asyncAll(arr, dimen, func, cb) {\n  var finished = 0;\n  var len;\n  var outputArr;\n\n  function done(i, output) {\n    finished++;\n    outputArr[i] = output;\n\n    if (finished === len) {\n      cb(null, outputArr.join(''));\n    }\n  }\n\n  if (lib.isArray(arr)) {\n    len = arr.length;\n    outputArr = new Array(len);\n\n    if (len === 0) {\n      cb(null, '');\n    } else {\n      for (let i = 0; i < arr.length; i++) {\n        const item = arr[i];\n\n        switch (dimen) {\n          case 1:\n            func(item, i, len, done);\n            break;\n          case 2:\n            func(item[0], item[1], i, len, done);\n            break;\n          case 3:\n            func(item[0], item[1], item[2], i, len, done);\n            break;\n          default:\n            item.push(i, len, done);\n            func.apply(this, item);\n        }\n      }\n    }\n  } else {\n    const keys = lib.keys(arr || {});\n    len = keys.length;\n    outputArr = new Array(len);\n\n    if (len === 0) {\n      cb(null, '');\n    } else {\n      for (let i = 0; i < keys.length; i++) {\n        const k = keys[i];\n        func(k, arr[k], i, len, done);\n      }\n    }\n  }\n}\n\nfunction fromIterator(arr) {\n  if (typeof arr !== 'object' || arr === null || lib.isArray(arr)) {\n    return arr;\n  } else if (supportsIterators && Symbol.iterator in arr) {\n    return arrayFrom(arr);\n  } else {\n    return arr;\n  }\n}\n\nmodule.exports = {\n  Frame: Frame,\n  makeMacro: makeMacro,\n  makeKeywordArgs: makeKeywordArgs,\n  numArgs: numArgs,\n  suppressValue: suppressValue,\n  ensureDefined: ensureDefined,\n  memberLookup: memberLookup,\n  contextOrFrameLookup: contextOrFrameLookup,\n  callWrap: callWrap,\n  handleError: handleError,\n  isArray: lib.isArray,\n  keys: lib.keys,\n  SafeString: SafeString,\n  copySafeness: copySafeness,\n  markSafe: markSafe,\n  asyncEach: asyncEach,\n  asyncAll: asyncAll,\n  inOperator: lib.inOperator,\n  fromIterator: fromIterator\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/runtime.js","'use strict';\n\nconst {Obj} = require('./object');\n\nfunction traverseAndCheck(obj, type, results) {\n  if (obj instanceof type) {\n    results.push(obj);\n  }\n\n  if (obj instanceof Node) {\n    obj.findAll(type, results);\n  }\n}\n\nclass Node extends Obj {\n  init(lineno, colno, ...args) {\n    this.lineno = lineno;\n    this.colno = colno;\n\n    this.fields.forEach((field, i) => {\n      // The first two args are line/col numbers, so offset by 2\n      var val = arguments[i + 2];\n\n      // Fields should never be undefined, but null. It makes\n      // testing easier to normalize values.\n      if (val === undefined) {\n        val = null;\n      }\n\n      this[field] = val;\n    });\n  }\n\n  findAll(type, results) {\n    results = results || [];\n\n    if (this instanceof NodeList) {\n      this.children.forEach(child => traverseAndCheck(child, type, results));\n    } else {\n      this.fields.forEach(field => traverseAndCheck(this[field], type, results));\n    }\n\n    return results;\n  }\n\n  iterFields(func) {\n    this.fields.forEach((field) => {\n      func(this[field], field);\n    });\n  }\n}\n\n// Abstract nodes\nclass Value extends Node {\n  get typename() { return 'Value'; }\n  get fields() {\n    return ['value'];\n  }\n}\n\n// Concrete nodes\nclass NodeList extends Node {\n  get typename() { return 'NodeList'; }\n  get fields() { return ['children']; }\n\n  init(lineno, colno, nodes) {\n    super.init(lineno, colno, nodes || []);\n  }\n\n  addChild(node) {\n    this.children.push(node);\n  }\n}\n\nconst Root = NodeList.extend('Root');\nconst Literal = Value.extend('Literal');\nconst Symbol = Value.extend('Symbol');\nconst Group = NodeList.extend('Group');\nconst ArrayNode = NodeList.extend('Array');\nconst Pair = Node.extend('Pair', { fields: ['key', 'value'] });\nconst Dict = NodeList.extend('Dict');\nconst LookupVal = Node.extend('LookupVal', { fields: ['target', 'val'] });\nconst If = Node.extend('If', { fields: ['cond', 'body', 'else_'] });\nconst IfAsync = If.extend('IfAsync');\nconst InlineIf = Node.extend('InlineIf', { fields: ['cond', 'body', 'else_'] });\nconst For = Node.extend('For', { fields: ['arr', 'name', 'body', 'else_'] });\nconst AsyncEach = For.extend('AsyncEach');\nconst AsyncAll = For.extend('AsyncAll');\nconst Macro = Node.extend('Macro', { fields: ['name', 'args', 'body'] });\nconst Caller = Macro.extend('Caller');\nconst Import = Node.extend('Import', { fields: ['template', 'target', 'withContext'] });\n\nclass FromImport extends Node {\n  get typename() { return 'FromImport'; }\n  get fields() { return ['template', 'names', 'withContext']; }\n\n  init(lineno, colno, template, names, withContext) {\n    super.init(lineno, colno, template, names || new NodeList(), withContext);\n  }\n}\n\nconst FunCall = Node.extend('FunCall', { fields: ['name', 'args'] });\nconst Filter = FunCall.extend('Filter');\nconst FilterAsync = Filter.extend('FilterAsync', { fields: ['name', 'args', 'symbol'] });\nconst KeywordArgs = Dict.extend('KeywordArgs');\nconst Block = Node.extend('Block', { fields: ['name', 'body'] });\nconst Super = Node.extend('Super', { fields: ['blockName', 'symbol'] });\nconst TemplateRef = Node.extend('TemplateRef', { fields: ['template'] });\nconst Extends = TemplateRef.extend('Extends');\nconst Include = Node.extend('Include', { fields: ['template', 'ignoreMissing'] });\nconst Set = Node.extend('Set', { fields: ['targets', 'value'] });\nconst Switch = Node.extend('Switch', { fields: ['expr', 'cases', 'default'] });\nconst Case = Node.extend('Case', { fields: ['cond', 'body'] });\nconst Output = NodeList.extend('Output');\nconst Capture = Node.extend('Capture', { fields: ['body'] });\nconst TemplateData = Literal.extend('TemplateData');\nconst UnaryOp = Node.extend('UnaryOp', { fields: ['target'] });\nconst BinOp = Node.extend('BinOp', { fields: ['left', 'right'] });\nconst In = BinOp.extend('In');\nconst Is = BinOp.extend('Is');\nconst Or = BinOp.extend('Or');\nconst And = BinOp.extend('And');\nconst Not = UnaryOp.extend('Not');\nconst Add = BinOp.extend('Add');\nconst Concat = BinOp.extend('Concat');\nconst Sub = BinOp.extend('Sub');\nconst Mul = BinOp.extend('Mul');\nconst Div = BinOp.extend('Div');\nconst FloorDiv = BinOp.extend('FloorDiv');\nconst Mod = BinOp.extend('Mod');\nconst Pow = BinOp.extend('Pow');\nconst Neg = UnaryOp.extend('Neg');\nconst Pos = UnaryOp.extend('Pos');\nconst Compare = Node.extend('Compare', { fields: ['expr', 'ops'] });\nconst CompareOperand = Node.extend('CompareOperand', { fields: ['expr', 'type'] });\nconst CallExtension = Node.extend('CallExtension', {\n  init(ext, prop, args, contentArgs) {\n    this.parent();\n    this.extName = ext.__name || ext;\n    this.prop = prop;\n    this.args = args || new NodeList();\n    this.contentArgs = contentArgs || [];\n    this.autoescape = ext.autoescape;\n  },\n  fields: ['extName', 'prop', 'args', 'contentArgs']\n});\nconst CallExtensionAsync = CallExtension.extend('CallExtensionAsync');\n\n// This is hacky, but this is just a debugging function anyway\nfunction print(str, indent, inline) {\n  var lines = str.split('\\n');\n\n  lines.forEach((line, i) => {\n    if (line && ((inline && i > 0) || !inline)) {\n      process.stdout.write((' ').repeat(indent));\n    }\n    const nl = (i === lines.length - 1) ? '' : '\\n';\n    process.stdout.write(`${line}${nl}`);\n  });\n}\n\n// Print the AST in a nicely formatted tree format for debuggin\nfunction printNodes(node, indent) {\n  indent = indent || 0;\n\n  print(node.typename + ': ', indent);\n\n  if (node instanceof NodeList) {\n    print('\\n');\n    node.children.forEach((n) => {\n      printNodes(n, indent + 2);\n    });\n  } else if (node instanceof CallExtension) {\n    print(`${node.extName}.${node.prop}\\n`);\n\n    if (node.args) {\n      printNodes(node.args, indent + 2);\n    }\n\n    if (node.contentArgs) {\n      node.contentArgs.forEach((n) => {\n        printNodes(n, indent + 2);\n      });\n    }\n  } else {\n    let nodes = [];\n    let props = null;\n\n    node.iterFields((val, fieldName) => {\n      if (val instanceof Node) {\n        nodes.push([fieldName, val]);\n      } else {\n        props = props || {};\n        props[fieldName] = val;\n      }\n    });\n\n    if (props) {\n      print(JSON.stringify(props, null, 2) + '\\n', null, true);\n    } else {\n      print('\\n');\n    }\n\n    nodes.forEach(([fieldName, n]) => {\n      print(`[${fieldName}] =>`, indent + 2);\n      printNodes(n, indent + 4);\n    });\n  }\n}\n\nmodule.exports = {\n  Node: Node,\n  Root: Root,\n  NodeList: NodeList,\n  Value: Value,\n  Literal: Literal,\n  Symbol: Symbol,\n  Group: Group,\n  Array: ArrayNode,\n  Pair: Pair,\n  Dict: Dict,\n  Output: Output,\n  Capture: Capture,\n  TemplateData: TemplateData,\n  If: If,\n  IfAsync: IfAsync,\n  InlineIf: InlineIf,\n  For: For,\n  AsyncEach: AsyncEach,\n  AsyncAll: AsyncAll,\n  Macro: Macro,\n  Caller: Caller,\n  Import: Import,\n  FromImport: FromImport,\n  FunCall: FunCall,\n  Filter: Filter,\n  FilterAsync: FilterAsync,\n  KeywordArgs: KeywordArgs,\n  Block: Block,\n  Super: Super,\n  Extends: Extends,\n  Include: Include,\n  Set: Set,\n  Switch: Switch,\n  Case: Case,\n  LookupVal: LookupVal,\n  BinOp: BinOp,\n  In: In,\n  Is: Is,\n  Or: Or,\n  And: And,\n  Not: Not,\n  Add: Add,\n  Concat: Concat,\n  Sub: Sub,\n  Mul: Mul,\n  Div: Div,\n  FloorDiv: FloorDiv,\n  Mod: Mod,\n  Pow: Pow,\n  Neg: Neg,\n  Pos: Pos,\n  Compare: Compare,\n  CompareOperand: CompareOperand,\n\n  CallExtension: CallExtension,\n  CallExtensionAsync: CallExtensionAsync,\n\n  printNodes: printNodes\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/nodes.js","'use strict';\n\nconst parser = require('./parser');\nconst transformer = require('./transformer');\nconst nodes = require('./nodes');\nconst {TemplateError} = require('./lib');\nconst {Frame} = require('./runtime');\nconst {Obj} = require('./object');\n\n// These are all the same for now, but shouldn't be passed straight\n// through\nconst compareOps = {\n  '==': '==',\n  '===': '===',\n  '!=': '!=',\n  '!==': '!==',\n  '<': '<',\n  '>': '>',\n  '<=': '<=',\n  '>=': '>='\n};\n\nclass Compiler extends Obj {\n  init(templateName, throwOnUndefined) {\n    this.templateName = templateName;\n    this.codebuf = [];\n    this.lastId = 0;\n    this.buffer = null;\n    this.bufferStack = [];\n    this._scopeClosers = '';\n    this.inBlock = false;\n    this.throwOnUndefined = throwOnUndefined;\n  }\n\n  fail(msg, lineno, colno) {\n    if (lineno !== undefined) {\n      lineno += 1;\n    }\n    if (colno !== undefined) {\n      colno += 1;\n    }\n\n    throw new TemplateError(msg, lineno, colno);\n  }\n\n  _pushBuffer() {\n    const id = this._tmpid();\n    this.bufferStack.push(this.buffer);\n    this.buffer = id;\n    this._emit(`var ${this.buffer} = \"\";`);\n    return id;\n  }\n\n  _popBuffer() {\n    this.buffer = this.bufferStack.pop();\n  }\n\n  _emit(code) {\n    this.codebuf.push(code);\n  }\n\n  _emitLine(code) {\n    this._emit(code + '\\n');\n  }\n\n  _emitLines(...lines) {\n    lines.forEach((line) => this._emitLine(line));\n  }\n\n  _emitFuncBegin(node, name) {\n    this.buffer = 'output';\n    this._scopeClosers = '';\n    this._emitLine(`function ${name}(env, context, frame, runtime, cb) {`);\n    this._emitLine(`var lineno = ${node.lineno};`);\n    this._emitLine(`var colno = ${node.colno};`);\n    this._emitLine(`var ${this.buffer} = \"\";`);\n    this._emitLine('try {');\n  }\n\n  _emitFuncEnd(noReturn) {\n    if (!noReturn) {\n      this._emitLine('cb(null, ' + this.buffer + ');');\n    }\n\n    this._closeScopeLevels();\n    this._emitLine('} catch (e) {');\n    this._emitLine('  cb(runtime.handleError(e, lineno, colno));');\n    this._emitLine('}');\n    this._emitLine('}');\n    this.buffer = null;\n  }\n\n  _addScopeLevel() {\n    this._scopeClosers += '})';\n  }\n\n  _closeScopeLevels() {\n    this._emitLine(this._scopeClosers + ';');\n    this._scopeClosers = '';\n  }\n\n  _withScopedSyntax(func) {\n    var _scopeClosers = this._scopeClosers;\n    this._scopeClosers = '';\n\n    func.call(this);\n\n    this._closeScopeLevels();\n    this._scopeClosers = _scopeClosers;\n  }\n\n  _makeCallback(res) {\n    var err = this._tmpid();\n\n    return 'function(' + err + (res ? ',' + res : '') + ') {\\n' +\n      'if(' + err + ') { cb(' + err + '); return; }';\n  }\n\n  _tmpid() {\n    this.lastId++;\n    return 't_' + this.lastId;\n  }\n\n  _templateName() {\n    return this.templateName == null ? 'undefined' : JSON.stringify(this.templateName);\n  }\n\n  _compileChildren(node, frame) {\n    node.children.forEach((child) => {\n      this.compile(child, frame);\n    });\n  }\n\n  _compileAggregate(node, frame, startChar, endChar) {\n    if (startChar) {\n      this._emit(startChar);\n    }\n\n    node.children.forEach((child, i) => {\n      if (i > 0) {\n        this._emit(',');\n      }\n\n      this.compile(child, frame);\n    });\n\n    if (endChar) {\n      this._emit(endChar);\n    }\n  }\n\n  _compileExpression(node, frame) {\n    // TODO: I'm not really sure if this type check is worth it or\n    // not.\n    this.assertType(\n      node,\n      nodes.Literal,\n      nodes.Symbol,\n      nodes.Group,\n      nodes.Array,\n      nodes.Dict,\n      nodes.FunCall,\n      nodes.Caller,\n      nodes.Filter,\n      nodes.LookupVal,\n      nodes.Compare,\n      nodes.InlineIf,\n      nodes.In,\n      nodes.Is,\n      nodes.And,\n      nodes.Or,\n      nodes.Not,\n      nodes.Add,\n      nodes.Concat,\n      nodes.Sub,\n      nodes.Mul,\n      nodes.Div,\n      nodes.FloorDiv,\n      nodes.Mod,\n      nodes.Pow,\n      nodes.Neg,\n      nodes.Pos,\n      nodes.Compare,\n      nodes.NodeList\n    );\n    this.compile(node, frame);\n  }\n\n  assertType(node, ...types) {\n    if (!types.some(t => node instanceof t)) {\n      this.fail(`assertType: invalid type: ${node.typename}`, node.lineno, node.colno);\n    }\n  }\n\n  compileCallExtension(node, frame, async) {\n    var args = node.args;\n    var contentArgs = node.contentArgs;\n    var autoescape = typeof node.autoescape === 'boolean' ? node.autoescape : true;\n\n    if (!async) {\n      this._emit(`${this.buffer} += runtime.suppressValue(`);\n    }\n\n    this._emit(`env.getExtension(\"${node.extName}\")[\"${node.prop}\"](`);\n    this._emit('context');\n\n    if (args || contentArgs) {\n      this._emit(',');\n    }\n\n    if (args) {\n      if (!(args instanceof nodes.NodeList)) {\n        this.fail('compileCallExtension: arguments must be a NodeList, ' +\n          'use `parser.parseSignature`');\n      }\n\n      args.children.forEach((arg, i) => {\n        // Tag arguments are passed normally to the call. Note\n        // that keyword arguments are turned into a single js\n        // object as the last argument, if they exist.\n        this._compileExpression(arg, frame);\n\n        if (i !== args.children.length - 1 || contentArgs.length) {\n          this._emit(',');\n        }\n      });\n    }\n\n    if (contentArgs.length) {\n      contentArgs.forEach((arg, i) => {\n        if (i > 0) {\n          this._emit(',');\n        }\n\n        if (arg) {\n          this._emitLine('function(cb) {');\n          this._emitLine('if(!cb) { cb = function(err) { if(err) { throw err; }}}');\n          const id = this._pushBuffer();\n\n          this._withScopedSyntax(() => {\n            this.compile(arg, frame);\n            this._emitLine(`cb(null, ${id});`);\n          });\n\n          this._popBuffer();\n          this._emitLine(`return ${id};`);\n          this._emitLine('}');\n        } else {\n          this._emit('null');\n        }\n      });\n    }\n\n    if (async) {\n      const res = this._tmpid();\n      this._emitLine(', ' + this._makeCallback(res));\n      this._emitLine(\n        `${this.buffer} += runtime.suppressValue(${res}, ${autoescape} && env.opts.autoescape);`);\n      this._addScopeLevel();\n    } else {\n      this._emit(')');\n      this._emit(`, ${autoescape} && env.opts.autoescape);\\n`);\n    }\n  }\n\n  compileCallExtensionAsync(node, frame) {\n    this.compileCallExtension(node, frame, true);\n  }\n\n  compileNodeList(node, frame) {\n    this._compileChildren(node, frame);\n  }\n\n  compileLiteral(node) {\n    if (typeof node.value === 'string') {\n      let val = node.value.replace(/\\\\/g, '\\\\\\\\');\n      val = val.replace(/\"/g, '\\\\\"');\n      val = val.replace(/\\n/g, '\\\\n');\n      val = val.replace(/\\r/g, '\\\\r');\n      val = val.replace(/\\t/g, '\\\\t');\n      val = val.replace(/\\u2028/g, '\\\\u2028');\n      this._emit(`\"${val}\"`);\n    } else if (node.value === null) {\n      this._emit('null');\n    } else {\n      this._emit(node.value.toString());\n    }\n  }\n\n  compileSymbol(node, frame) {\n    var name = node.value;\n    var v = frame.lookup(name);\n\n    if (v) {\n      this._emit(v);\n    } else {\n      this._emit('runtime.contextOrFrameLookup(' +\n        'context, frame, \"' + name + '\")');\n    }\n  }\n\n  compileGroup(node, frame) {\n    this._compileAggregate(node, frame, '(', ')');\n  }\n\n  compileArray(node, frame) {\n    this._compileAggregate(node, frame, '[', ']');\n  }\n\n  compileDict(node, frame) {\n    this._compileAggregate(node, frame, '{', '}');\n  }\n\n  compilePair(node, frame) {\n    var key = node.key;\n    var val = node.value;\n\n    if (key instanceof nodes.Symbol) {\n      key = new nodes.Literal(key.lineno, key.colno, key.value);\n    } else if (!(key instanceof nodes.Literal &&\n      typeof key.value === 'string')) {\n      this.fail('compilePair: Dict keys must be strings or names',\n        key.lineno,\n        key.colno);\n    }\n\n    this.compile(key, frame);\n    this._emit(': ');\n    this._compileExpression(val, frame);\n  }\n\n  compileInlineIf(node, frame) {\n    this._emit('(');\n    this.compile(node.cond, frame);\n    this._emit('?');\n    this.compile(node.body, frame);\n    this._emit(':');\n    if (node.else_ !== null) {\n      this.compile(node.else_, frame);\n    } else {\n      this._emit('\"\"');\n    }\n    this._emit(')');\n  }\n\n  compileIn(node, frame) {\n    this._emit('runtime.inOperator(');\n    this.compile(node.left, frame);\n    this._emit(',');\n    this.compile(node.right, frame);\n    this._emit(')');\n  }\n\n  compileIs(node, frame) {\n    // first, we need to try to get the name of the test function, if it's a\n    // callable (i.e., has args) and not a symbol.\n    var right = node.right.name\n      ? node.right.name.value\n      // otherwise go with the symbol value\n      : node.right.value;\n    this._emit('env.getTest(\"' + right + '\").call(context, ');\n    this.compile(node.left, frame);\n    // compile the arguments for the callable if they exist\n    if (node.right.args) {\n      this._emit(',');\n      this.compile(node.right.args, frame);\n    }\n    this._emit(') === true');\n  }\n\n  _binOpEmitter(node, frame, str) {\n    this.compile(node.left, frame);\n    this._emit(str);\n    this.compile(node.right, frame);\n  }\n\n  // ensure concatenation instead of addition\n  // by adding empty string in between\n  compileOr(node, frame) {\n    return this._binOpEmitter(node, frame, ' || ');\n  }\n\n  compileAnd(node, frame) {\n    return this._binOpEmitter(node, frame, ' && ');\n  }\n\n  compileAdd(node, frame) {\n    return this._binOpEmitter(node, frame, ' + ');\n  }\n\n  compileConcat(node, frame) {\n    return this._binOpEmitter(node, frame, ' + \"\" + ');\n  }\n\n  compileSub(node, frame) {\n    return this._binOpEmitter(node, frame, ' - ');\n  }\n\n  compileMul(node, frame) {\n    return this._binOpEmitter(node, frame, ' * ');\n  }\n\n  compileDiv(node, frame) {\n    return this._binOpEmitter(node, frame, ' / ');\n  }\n\n  compileMod(node, frame) {\n    return this._binOpEmitter(node, frame, ' % ');\n  }\n\n  compileNot(node, frame) {\n    this._emit('!');\n    this.compile(node.target, frame);\n  }\n\n  compileFloorDiv(node, frame) {\n    this._emit('Math.floor(');\n    this.compile(node.left, frame);\n    this._emit(' / ');\n    this.compile(node.right, frame);\n    this._emit(')');\n  }\n\n  compilePow(node, frame) {\n    this._emit('Math.pow(');\n    this.compile(node.left, frame);\n    this._emit(', ');\n    this.compile(node.right, frame);\n    this._emit(')');\n  }\n\n  compileNeg(node, frame) {\n    this._emit('-');\n    this.compile(node.target, frame);\n  }\n\n  compilePos(node, frame) {\n    this._emit('+');\n    this.compile(node.target, frame);\n  }\n\n  compileCompare(node, frame) {\n    this.compile(node.expr, frame);\n\n    node.ops.forEach((op) => {\n      this._emit(` ${compareOps[op.type]} `);\n      this.compile(op.expr, frame);\n    });\n  }\n\n  compileLookupVal(node, frame) {\n    this._emit('runtime.memberLookup((');\n    this._compileExpression(node.target, frame);\n    this._emit('),');\n    this._compileExpression(node.val, frame);\n    this._emit(')');\n  }\n\n  _getNodeName(node) {\n    switch (node.typename) {\n      case 'Symbol':\n        return node.value;\n      case 'FunCall':\n        return 'the return value of (' + this._getNodeName(node.name) + ')';\n      case 'LookupVal':\n        return this._getNodeName(node.target) + '[\"' +\n          this._getNodeName(node.val) + '\"]';\n      case 'Literal':\n        return node.value.toString();\n      default:\n        return '--expression--';\n    }\n  }\n\n  compileFunCall(node, frame) {\n    // Keep track of line/col info at runtime by settings\n    // variables within an expression. An expression in javascript\n    // like (x, y, z) returns the last value, and x and y can be\n    // anything\n    this._emit('(lineno = ' + node.lineno +\n      ', colno = ' + node.colno + ', ');\n\n    this._emit('runtime.callWrap(');\n    // Compile it as normal.\n    this._compileExpression(node.name, frame);\n\n    // Output the name of what we're calling so we can get friendly errors\n    // if the lookup fails.\n    this._emit(', \"' + this._getNodeName(node.name).replace(/\"/g, '\\\\\"') + '\", context, ');\n\n    this._compileAggregate(node.args, frame, '[', '])');\n\n    this._emit(')');\n  }\n\n  compileFilter(node, frame) {\n    var name = node.name;\n    this.assertType(name, nodes.Symbol);\n    this._emit('env.getFilter(\"' + name.value + '\").call(context, ');\n    this._compileAggregate(node.args, frame);\n    this._emit(')');\n  }\n\n  compileFilterAsync(node, frame) {\n    var name = node.name;\n    var symbol = node.symbol.value;\n\n    this.assertType(name, nodes.Symbol);\n\n    frame.set(symbol, symbol);\n\n    this._emit('env.getFilter(\"' + name.value + '\").call(context, ');\n    this._compileAggregate(node.args, frame);\n    this._emitLine(', ' + this._makeCallback(symbol));\n\n    this._addScopeLevel();\n  }\n\n  compileKeywordArgs(node, frame) {\n    this._emit('runtime.makeKeywordArgs(');\n    this.compileDict(node, frame);\n    this._emit(')');\n  }\n\n  compileSet(node, frame) {\n    var ids = [];\n\n    // Lookup the variable names for each identifier and create\n    // new ones if necessary\n    node.targets.forEach((target) => {\n      var name = target.value;\n      var id = frame.lookup(name);\n\n      if (id === null || id === undefined) {\n        id = this._tmpid();\n\n        // Note: This relies on js allowing scope across\n        // blocks, in case this is created inside an `if`\n        this._emitLine('var ' + id + ';');\n      }\n\n      ids.push(id);\n    });\n\n    if (node.value) {\n      this._emit(ids.join(' = ') + ' = ');\n      this._compileExpression(node.value, frame);\n      this._emitLine(';');\n    } else {\n      this._emit(ids.join(' = ') + ' = ');\n      this.compile(node.body, frame);\n      this._emitLine(';');\n    }\n\n    node.targets.forEach((target, i) => {\n      var id = ids[i];\n      var name = target.value;\n\n      // We are running this for every var, but it's very\n      // uncommon to assign to multiple vars anyway\n      this._emitLine(`frame.set(\"${name}\", ${id}, true);`);\n\n      this._emitLine('if(frame.topLevel) {');\n      this._emitLine(`context.setVariable(\"${name}\", ${id});`);\n      this._emitLine('}');\n\n      if (name.charAt(0) !== '_') {\n        this._emitLine('if(frame.topLevel) {');\n        this._emitLine(`context.addExport(\"${name}\", ${id});`);\n        this._emitLine('}');\n      }\n    });\n  }\n\n  compileSwitch(node, frame) {\n    this._emit('switch (');\n    this.compile(node.expr, frame);\n    this._emit(') {');\n    node.cases.forEach((c, i) => {\n      this._emit('case ');\n      this.compile(c.cond, frame);\n      this._emit(': ');\n      this.compile(c.body, frame);\n      // preserve fall-throughs\n      if (c.body.children.length) {\n        this._emitLine('break;');\n      }\n    });\n    if (node.default) {\n      this._emit('default:');\n      this.compile(node.default, frame);\n    }\n    this._emit('}');\n  }\n\n  compileIf(node, frame, async) {\n    this._emit('if(');\n    this._compileExpression(node.cond, frame);\n    this._emitLine(') {');\n\n    this._withScopedSyntax(() => {\n      this.compile(node.body, frame);\n\n      if (async) {\n        this._emit('cb()');\n      }\n    });\n\n    if (node.else_) {\n      this._emitLine('}\\nelse {');\n\n      this._withScopedSyntax(() => {\n        this.compile(node.else_, frame);\n\n        if (async) {\n          this._emit('cb()');\n        }\n      });\n    } else if (async) {\n      this._emitLine('}\\nelse {');\n      this._emit('cb()');\n    }\n\n    this._emitLine('}');\n  }\n\n  compileIfAsync(node, frame) {\n    this._emit('(function(cb) {');\n    this.compileIf(node, frame, true);\n    this._emit('})(' + this._makeCallback());\n    this._addScopeLevel();\n  }\n\n  _emitLoopBindings(node, arr, i, len) {\n    const bindings = [\n      {name: 'index', val: `${i} + 1`},\n      {name: 'index0', val: i},\n      {name: 'revindex', val: `${len} - ${i}`},\n      {name: 'revindex0', val: `${len} - ${i} - 1`},\n      {name: 'first', val: `${i} === 0`},\n      {name: 'last', val: `${i} === ${len} - 1`},\n      {name: 'length', val: len},\n    ];\n\n    bindings.forEach((b) => {\n      this._emitLine(`frame.set(\"loop.${b.name}\", ${b.val});`);\n    });\n  }\n\n  compileFor(node, frame) {\n    // Some of this code is ugly, but it keeps the generated code\n    // as fast as possible. ForAsync also shares some of this, but\n    // not much.\n\n    const i = this._tmpid();\n    const len = this._tmpid();\n    const arr = this._tmpid();\n    frame = frame.push();\n\n    this._emitLine('frame = frame.push();');\n\n    this._emit(`var ${arr} = `);\n    this._compileExpression(node.arr, frame);\n    this._emitLine(';');\n\n    this._emit(`if(${arr}) {`);\n    this._emitLine(arr + ' = runtime.fromIterator(' + arr + ');');\n\n    // If multiple names are passed, we need to bind them\n    // appropriately\n    if (node.name instanceof nodes.Array) {\n      this._emitLine(`var ${i};`);\n\n      // The object could be an arroy or object. Note that the\n      // body of the loop is duplicated for each condition, but\n      // we are optimizing for speed over size.\n      this._emitLine(`if(runtime.isArray(${arr})) {`);\n      this._emitLine(`var ${len} = ${arr}.length;`);\n      this._emitLine(`for(${i}=0; ${i} < ${arr}.length; ${i}++) {`);\n\n      // Bind each declared var\n      node.name.children.forEach((child, u) => {\n        var tid = this._tmpid();\n        this._emitLine(`var ${tid} = ${arr}[${i}][${u}];`);\n        this._emitLine(`frame.set(\"${child}\", ${arr}[${i}][${u}]);`);\n        frame.set(node.name.children[u].value, tid);\n      });\n\n      this._emitLoopBindings(node, arr, i, len);\n      this._withScopedSyntax(() => {\n        this.compile(node.body, frame);\n      });\n      this._emitLine('}');\n\n      this._emitLine('} else {');\n      // Iterate over the key/values of an object\n      const [key, val] = node.name.children;\n      const k = this._tmpid();\n      const v = this._tmpid();\n      frame.set(key.value, k);\n      frame.set(val.value, v);\n\n      this._emitLine(`${i} = -1;`);\n      this._emitLine(`var ${len} = runtime.keys(${arr}).length;`);\n      this._emitLine(`for(var ${k} in ${arr}) {`);\n      this._emitLine(`${i}++;`);\n      this._emitLine(`var ${v} = ${arr}[${k}];`);\n      this._emitLine(`frame.set(\"${key.value}\", ${k});`);\n      this._emitLine(`frame.set(\"${val.value}\", ${v});`);\n\n      this._emitLoopBindings(node, arr, i, len);\n      this._withScopedSyntax(() => {\n        this.compile(node.body, frame);\n      });\n      this._emitLine('}');\n\n      this._emitLine('}');\n    } else {\n      // Generate a typical array iteration\n      const v = this._tmpid();\n      frame.set(node.name.value, v);\n\n      this._emitLine(`var ${len} = ${arr}.length;`);\n      this._emitLine(`for(var ${i}=0; ${i} < ${arr}.length; ${i}++) {`);\n      this._emitLine(`var ${v} = ${arr}[${i}];`);\n      this._emitLine(`frame.set(\"${node.name.value}\", ${v});`);\n\n      this._emitLoopBindings(node, arr, i, len);\n\n      this._withScopedSyntax(() => {\n        this.compile(node.body, frame);\n      });\n\n      this._emitLine('}');\n    }\n\n    this._emitLine('}');\n    if (node.else_) {\n      this._emitLine('if (!' + len + ') {');\n      this.compile(node.else_, frame);\n      this._emitLine('}');\n    }\n\n    this._emitLine('frame = frame.pop();');\n  }\n\n  _compileAsyncLoop(node, frame, parallel) {\n    // This shares some code with the For tag, but not enough to\n    // worry about. This iterates across an object asynchronously,\n    // but not in parallel.\n\n    var i = this._tmpid();\n    var len = this._tmpid();\n    var arr = this._tmpid();\n    var asyncMethod = parallel ? 'asyncAll' : 'asyncEach';\n    frame = frame.push();\n\n    this._emitLine('frame = frame.push();');\n\n    this._emit('var ' + arr + ' = runtime.fromIterator(');\n    this._compileExpression(node.arr, frame);\n    this._emitLine(');');\n\n    if (node.name instanceof nodes.Array) {\n      const arrayLen = node.name.children.length;\n      this._emit(`runtime.${asyncMethod}(${arr}, ${arrayLen}, function(`);\n\n      node.name.children.forEach((name) => {\n        this._emit(`${name.value},`);\n      });\n\n      this._emit(i + ',' + len + ',next) {');\n\n      node.name.children.forEach((name) => {\n        const id = name.value;\n        frame.set(id, id);\n        this._emitLine(`frame.set(\"${id}\", ${id});`);\n      });\n    } else {\n      const id = node.name.value;\n      this._emitLine(`runtime.${asyncMethod}(${arr}, 1, function(${id}, ${i}, ${len},next) {`);\n      this._emitLine('frame.set(\"' + id + '\", ' + id + ');');\n      frame.set(id, id);\n    }\n\n    this._emitLoopBindings(node, arr, i, len);\n\n    this._withScopedSyntax(() => {\n      let buf;\n      if (parallel) {\n        buf = this._pushBuffer();\n      }\n\n      this.compile(node.body, frame);\n      this._emitLine('next(' + i + (buf ? ',' + buf : '') + ');');\n\n      if (parallel) {\n        this._popBuffer();\n      }\n    });\n\n    const output = this._tmpid();\n    this._emitLine('}, ' + this._makeCallback(output));\n    this._addScopeLevel();\n\n    if (parallel) {\n      this._emitLine(this.buffer + ' += ' + output + ';');\n    }\n\n    if (node.else_) {\n      this._emitLine('if (!' + arr + '.length) {');\n      this.compile(node.else_, frame);\n      this._emitLine('}');\n    }\n\n    this._emitLine('frame = frame.pop();');\n  }\n\n  compileAsyncEach(node, frame) {\n    this._compileAsyncLoop(node, frame);\n  }\n\n  compileAsyncAll(node, frame) {\n    this._compileAsyncLoop(node, frame, true);\n  }\n\n  _compileMacro(node, frame) {\n    var args = [];\n    var kwargs = null;\n    var funcId = 'macro_' + this._tmpid();\n    var keepFrame = (frame !== undefined);\n\n    // Type check the definition of the args\n    node.args.children.forEach((arg, i) => {\n      if (i === node.args.children.length - 1 && arg instanceof nodes.Dict) {\n        kwargs = arg;\n      } else {\n        this.assertType(arg, nodes.Symbol);\n        args.push(arg);\n      }\n    });\n\n    const realNames = [...args.map((n) => `l_${n.value}`), 'kwargs'];\n\n    // Quoted argument names\n    const argNames = args.map((n) => `\"${n.value}\"`);\n    const kwargNames = ((kwargs && kwargs.children) || []).map((n) => `\"${n.key.value}\"`);\n\n    // We pass a function to makeMacro which destructures the\n    // arguments so support setting positional args with keywords\n    // args and passing keyword args as positional args\n    // (essentially default values). See runtime.js.\n    let currFrame;\n    if (keepFrame) {\n      currFrame = frame.push(true);\n    } else {\n      currFrame = new Frame();\n    }\n    this._emitLines(\n      `var ${funcId} = runtime.makeMacro(`,\n      `[${argNames.join(', ')}], `,\n      `[${kwargNames.join(', ')}], `,\n      `function (${realNames.join(', ')}) {`,\n      'var callerFrame = frame;',\n      'frame = ' + ((keepFrame) ? 'frame.push(true);' : 'new runtime.Frame();'),\n      'kwargs = kwargs || {};',\n      'if (Object.prototype.hasOwnProperty.call(kwargs, \"caller\")) {',\n      'frame.set(\"caller\", kwargs.caller); }');\n\n    // Expose the arguments to the template. Don't need to use\n    // random names because the function\n    // will create a new run-time scope for us\n    args.forEach((arg) => {\n      this._emitLine(`frame.set(\"${arg.value}\", l_${arg.value});`);\n      currFrame.set(arg.value, `l_${arg.value}`);\n    });\n\n    // Expose the keyword arguments\n    if (kwargs) {\n      kwargs.children.forEach((pair) => {\n        const name = pair.key.value;\n        this._emit(`frame.set(\"${name}\", `);\n        this._emit(`Object.prototype.hasOwnProperty.call(kwargs, \"${name}\")`);\n        this._emit(` ? kwargs[\"${name}\"] : `);\n        this._compileExpression(pair.value, currFrame);\n        this._emit(');');\n      });\n    }\n\n    const bufferId = this._pushBuffer();\n\n    this._withScopedSyntax(() => {\n      this.compile(node.body, currFrame);\n    });\n\n    this._emitLine('frame = ' + ((keepFrame) ? 'frame.pop();' : 'callerFrame;'));\n    this._emitLine(`return new runtime.SafeString(${bufferId});`);\n    this._emitLine('});');\n    this._popBuffer();\n\n    return funcId;\n  }\n\n  compileMacro(node, frame) {\n    var funcId = this._compileMacro(node);\n\n    // Expose the macro to the templates\n    var name = node.name.value;\n    frame.set(name, funcId);\n\n    if (frame.parent) {\n      this._emitLine(`frame.set(\"${name}\", ${funcId});`);\n    } else {\n      if (node.name.value.charAt(0) !== '_') {\n        this._emitLine(`context.addExport(\"${name}\");`);\n      }\n      this._emitLine(`context.setVariable(\"${name}\", ${funcId});`);\n    }\n  }\n\n  compileCaller(node, frame) {\n    // basically an anonymous \"macro expression\"\n    this._emit('(function (){');\n    const funcId = this._compileMacro(node, frame);\n    this._emit(`return ${funcId};})()`);\n  }\n\n  _compileGetTemplate(node, frame, eagerCompile, ignoreMissing) {\n    const parentTemplateId = this._tmpid();\n    const parentName = this._templateName();\n    const cb = this._makeCallback(parentTemplateId);\n    const eagerCompileArg = (eagerCompile) ? 'true' : 'false';\n    const ignoreMissingArg = (ignoreMissing) ? 'true' : 'false';\n    this._emit('env.getTemplate(');\n    this._compileExpression(node.template, frame);\n    this._emitLine(`, ${eagerCompileArg}, ${parentName}, ${ignoreMissingArg}, ${cb}`);\n    return parentTemplateId;\n  }\n\n  compileImport(node, frame) {\n    const target = node.target.value;\n    const id = this._compileGetTemplate(node, frame, false, false);\n    this._addScopeLevel();\n\n    this._emitLine(id + '.getExported(' +\n      (node.withContext ? 'context.getVariables(), frame, ' : '') +\n      this._makeCallback(id));\n    this._addScopeLevel();\n\n    frame.set(target, id);\n\n    if (frame.parent) {\n      this._emitLine(`frame.set(\"${target}\", ${id});`);\n    } else {\n      this._emitLine(`context.setVariable(\"${target}\", ${id});`);\n    }\n  }\n\n  compileFromImport(node, frame) {\n    const importedId = this._compileGetTemplate(node, frame, false, false);\n    this._addScopeLevel();\n\n    this._emitLine(importedId + '.getExported(' +\n      (node.withContext ? 'context.getVariables(), frame, ' : '') +\n      this._makeCallback(importedId));\n    this._addScopeLevel();\n\n    node.names.children.forEach((nameNode) => {\n      var name;\n      var alias;\n      var id = this._tmpid();\n\n      if (nameNode instanceof nodes.Pair) {\n        name = nameNode.key.value;\n        alias = nameNode.value.value;\n      } else {\n        name = nameNode.value;\n        alias = name;\n      }\n\n      this._emitLine(`if(Object.prototype.hasOwnProperty.call(${importedId}, \"${name}\")) {`);\n      this._emitLine(`var ${id} = ${importedId}.${name};`);\n      this._emitLine('} else {');\n      this._emitLine(`cb(new Error(\"cannot import '${name}'\")); return;`);\n      this._emitLine('}');\n\n      frame.set(alias, id);\n\n      if (frame.parent) {\n        this._emitLine(`frame.set(\"${alias}\", ${id});`);\n      } else {\n        this._emitLine(`context.setVariable(\"${alias}\", ${id});`);\n      }\n    });\n  }\n\n  compileBlock(node) {\n    var id = this._tmpid();\n\n    // If we are executing outside a block (creating a top-level\n    // block), we really don't want to execute its code because it\n    // will execute twice: once when the child template runs and\n    // again when the parent template runs. Note that blocks\n    // within blocks will *always* execute immediately *and*\n    // wherever else they are invoked (like used in a parent\n    // template). This may have behavioral differences from jinja\n    // because blocks can have side effects, but it seems like a\n    // waste of performance to always execute huge top-level\n    // blocks twice\n    if (!this.inBlock) {\n      this._emit('(parentTemplate ? function(e, c, f, r, cb) { cb(\"\"); } : ');\n    }\n    this._emit(`context.getBlock(\"${node.name.value}\")`);\n    if (!this.inBlock) {\n      this._emit(')');\n    }\n    this._emitLine('(env, context, frame, runtime, ' + this._makeCallback(id));\n    this._emitLine(`${this.buffer} += ${id};`);\n    this._addScopeLevel();\n  }\n\n  compileSuper(node, frame) {\n    var name = node.blockName.value;\n    var id = node.symbol.value;\n\n    const cb = this._makeCallback(id);\n    this._emitLine(`context.getSuper(env, \"${name}\", b_${name}, frame, runtime, ${cb}`);\n    this._emitLine(`${id} = runtime.markSafe(${id});`);\n    this._addScopeLevel();\n    frame.set(id, id);\n  }\n\n  compileExtends(node, frame) {\n    var k = this._tmpid();\n\n    const parentTemplateId = this._compileGetTemplate(node, frame, true, false);\n\n    // extends is a dynamic tag and can occur within a block like\n    // `if`, so if this happens we need to capture the parent\n    // template in the top-level scope\n    this._emitLine(`parentTemplate = ${parentTemplateId}`);\n\n    this._emitLine(`for(var ${k} in parentTemplate.blocks) {`);\n    this._emitLine(`context.addBlock(${k}, parentTemplate.blocks[${k}]);`);\n    this._emitLine('}');\n\n    this._addScopeLevel();\n  }\n\n  compileInclude(node, frame) {\n    this._emitLine('var tasks = [];');\n    this._emitLine('tasks.push(');\n    this._emitLine('function(callback) {');\n    const id = this._compileGetTemplate(node, frame, false, node.ignoreMissing);\n    this._emitLine(`callback(null,${id});});`);\n    this._emitLine('});');\n\n    const id2 = this._tmpid();\n    this._emitLine('tasks.push(');\n    this._emitLine('function(template, callback){');\n    this._emitLine('template.render(context.getVariables(), frame, ' + this._makeCallback(id2));\n    this._emitLine('callback(null,' + id2 + ');});');\n    this._emitLine('});');\n\n    this._emitLine('tasks.push(');\n    this._emitLine('function(result, callback){');\n    this._emitLine(`${this.buffer} += result;`);\n    this._emitLine('callback(null);');\n    this._emitLine('});');\n    this._emitLine('env.waterfall(tasks, function(){');\n    this._addScopeLevel();\n  }\n\n  compileTemplateData(node, frame) {\n    this.compileLiteral(node, frame);\n  }\n\n  compileCapture(node, frame) {\n    // we need to temporarily override the current buffer id as 'output'\n    // so the set block writes to the capture output instead of the buffer\n    var buffer = this.buffer;\n    this.buffer = 'output';\n    this._emitLine('(function() {');\n    this._emitLine('var output = \"\";');\n    this._withScopedSyntax(() => {\n      this.compile(node.body, frame);\n    });\n    this._emitLine('return output;');\n    this._emitLine('})()');\n    // and of course, revert back to the old buffer id\n    this.buffer = buffer;\n  }\n\n  compileOutput(node, frame) {\n    const children = node.children;\n    children.forEach(child => {\n      // TemplateData is a special case because it is never\n      // autoescaped, so simply output it for optimization\n      if (child instanceof nodes.TemplateData) {\n        if (child.value) {\n          this._emit(`${this.buffer} += `);\n          this.compileLiteral(child, frame);\n          this._emitLine(';');\n        }\n      } else {\n        this._emit(`${this.buffer} += runtime.suppressValue(`);\n        if (this.throwOnUndefined) {\n          this._emit('runtime.ensureDefined(');\n        }\n        this.compile(child, frame);\n        if (this.throwOnUndefined) {\n          this._emit(`,${node.lineno},${node.colno})`);\n        }\n        this._emit(', env.opts.autoescape);\\n');\n      }\n    });\n  }\n\n  compileRoot(node, frame) {\n    if (frame) {\n      this.fail('compileRoot: root node can\\'t have frame');\n    }\n\n    frame = new Frame();\n\n    this._emitFuncBegin(node, 'root');\n    this._emitLine('var parentTemplate = null;');\n    this._compileChildren(node, frame);\n    this._emitLine('if(parentTemplate) {');\n    this._emitLine('parentTemplate.rootRenderFunc(env, context, frame, runtime, cb);');\n    this._emitLine('} else {');\n    this._emitLine(`cb(null, ${this.buffer});`);\n    this._emitLine('}');\n    this._emitFuncEnd(true);\n\n    this.inBlock = true;\n\n    const blockNames = [];\n\n    const blocks = node.findAll(nodes.Block);\n\n    blocks.forEach((block, i) => {\n      const name = block.name.value;\n\n      if (blockNames.indexOf(name) !== -1) {\n        throw new Error(`Block \"${name}\" defined more than once.`);\n      }\n      blockNames.push(name);\n\n      this._emitFuncBegin(block, `b_${name}`);\n\n      const tmpFrame = new Frame();\n      this._emitLine('var frame = frame.push(true);');\n      this.compile(block.body, tmpFrame);\n      this._emitFuncEnd();\n    });\n\n    this._emitLine('return {');\n\n    blocks.forEach((block, i) => {\n      const blockName = `b_${block.name.value}`;\n      this._emitLine(`${blockName}: ${blockName},`);\n    });\n\n    this._emitLine('root: root\\n};');\n  }\n\n  compile(node, frame) {\n    var _compile = this['compile' + node.typename];\n    if (_compile) {\n      _compile.call(this, node, frame);\n    } else {\n      this.fail(`compile: Cannot compile node: ${node.typename}`, node.lineno, node.colno);\n    }\n  }\n\n  getCode() {\n    return this.codebuf.join('');\n  }\n}\n\nmodule.exports = {\n  compile: function compile(src, asyncFilters, extensions, name, opts = {}) {\n    const c = new Compiler(name, opts.throwOnUndefined);\n\n    // Run the extension preprocessors against the source.\n    const preprocessors = (extensions || []).map(ext => ext.preprocess).filter(f => !!f);\n\n    const processedSrc = preprocessors.reduce((s, processor) => processor(s), src);\n\n    c.compile(transformer.transform(\n      parser.parse(processedSrc, extensions, opts),\n      asyncFilters,\n      name\n    ));\n    return c.getCode();\n  },\n\n  Compiler: Compiler\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/compiler.js","'use strict';\n\nconst path = require('path');\nconst {EmitterObj} = require('./object');\n\nmodule.exports = class Loader extends EmitterObj {\n  resolve(from, to) {\n    return path.resolve(path.dirname(from), to);\n  }\n\n  isRelative(filename) {\n    return (filename.indexOf('./') === 0 || filename.indexOf('../') === 0);\n  }\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/loader.js","'use strict';\n\nconst asap = require('asap');\nconst waterfall = require('a-sync-waterfall');\nconst lib = require('./lib');\nconst compiler = require('./compiler');\nconst filters = require('./filters');\nconst {FileSystemLoader, WebLoader, PrecompiledLoader} = require('./loaders');\nconst tests = require('./tests');\nconst globals = require('./globals');\nconst {Obj, EmitterObj} = require('./object');\nconst globalRuntime = require('./runtime');\nconst {handleError, Frame} = globalRuntime;\nconst expressApp = require('./express-app');\n\n// If the user is using the async API, *always* call it\n// asynchronously even if the template was synchronous.\nfunction callbackAsap(cb, err, res) {\n  asap(() => {\n    cb(err, res);\n  });\n}\n\n/**\n * A no-op template, for use with {% include ignore missing %}\n */\nconst noopTmplSrc = {\n  type: 'code',\n  obj: {\n    root(env, context, frame, runtime, cb) {\n      try {\n        cb(null, '');\n      } catch (e) {\n        cb(handleError(e, null, null));\n      }\n    }\n  }\n};\n\nclass Environment extends EmitterObj {\n  init(loaders, opts) {\n    // The dev flag determines the trace that'll be shown on errors.\n    // If set to true, returns the full trace from the error point,\n    // otherwise will return trace starting from Template.render\n    // (the full trace from within nunjucks may confuse developers using\n    //  the library)\n    // defaults to false\n    opts = this.opts = opts || {};\n    this.opts.dev = !!opts.dev;\n\n    // The autoescape flag sets global autoescaping. If true,\n    // every string variable will be escaped by default.\n    // If false, strings can be manually escaped using the `escape` filter.\n    // defaults to true\n    this.opts.autoescape = opts.autoescape != null ? opts.autoescape : true;\n\n    // If true, this will make the system throw errors if trying\n    // to output a null or undefined value\n    this.opts.throwOnUndefined = !!opts.throwOnUndefined;\n    this.opts.trimBlocks = !!opts.trimBlocks;\n    this.opts.lstripBlocks = !!opts.lstripBlocks;\n\n    this.loaders = [];\n\n    if (!loaders) {\n      // The filesystem loader is only available server-side\n      if (FileSystemLoader) {\n        this.loaders = [new FileSystemLoader('views')];\n      } else if (WebLoader) {\n        this.loaders = [new WebLoader('/views')];\n      }\n    } else {\n      this.loaders = lib.isArray(loaders) ? loaders : [loaders];\n    }\n\n    // It's easy to use precompiled templates: just include them\n    // before you configure nunjucks and this will automatically\n    // pick it up and use it\n    if (typeof window !== 'undefined' && window.nunjucksPrecompiled) {\n      this.loaders.unshift(\n        new PrecompiledLoader(window.nunjucksPrecompiled)\n      );\n    }\n\n    this._initLoaders();\n\n    this.globals = globals();\n    this.filters = {};\n    this.tests = {};\n    this.asyncFilters = [];\n    this.extensions = {};\n    this.extensionsList = [];\n\n    lib._entries(filters).forEach(([name, filter]) => this.addFilter(name, filter));\n    lib._entries(tests).forEach(([name, test]) => this.addTest(name, test));\n  }\n\n  _initLoaders() {\n    this.loaders.forEach((loader) => {\n      // Caching and cache busting\n      loader.cache = {};\n      if (typeof loader.on === 'function') {\n        loader.on('update', (name, fullname) => {\n          loader.cache[name] = null;\n          this.emit('update', name, fullname, loader);\n        });\n        loader.on('load', (name, source) => {\n          this.emit('load', name, source, loader);\n        });\n      }\n    });\n  }\n\n  invalidateCache() {\n    this.loaders.forEach((loader) => {\n      loader.cache = {};\n    });\n  }\n\n  addExtension(name, extension) {\n    extension.__name = name;\n    this.extensions[name] = extension;\n    this.extensionsList.push(extension);\n    return this;\n  }\n\n  removeExtension(name) {\n    var extension = this.getExtension(name);\n    if (!extension) {\n      return;\n    }\n\n    this.extensionsList = lib.without(this.extensionsList, extension);\n    delete this.extensions[name];\n  }\n\n  getExtension(name) {\n    return this.extensions[name];\n  }\n\n  hasExtension(name) {\n    return !!this.extensions[name];\n  }\n\n  addGlobal(name, value) {\n    this.globals[name] = value;\n    return this;\n  }\n\n  getGlobal(name) {\n    if (typeof this.globals[name] === 'undefined') {\n      throw new Error('global not found: ' + name);\n    }\n    return this.globals[name];\n  }\n\n  addFilter(name, func, async) {\n    var wrapped = func;\n\n    if (async) {\n      this.asyncFilters.push(name);\n    }\n    this.filters[name] = wrapped;\n    return this;\n  }\n\n  getFilter(name) {\n    if (!this.filters[name]) {\n      throw new Error('filter not found: ' + name);\n    }\n    return this.filters[name];\n  }\n\n  addTest(name, func) {\n    this.tests[name] = func;\n    return this;\n  }\n\n  getTest(name) {\n    if (!this.tests[name]) {\n      throw new Error('test not found: ' + name);\n    }\n    return this.tests[name];\n  }\n\n  resolveTemplate(loader, parentName, filename) {\n    var isRelative = (loader.isRelative && parentName) ? loader.isRelative(filename) : false;\n    return (isRelative && loader.resolve) ? loader.resolve(parentName, filename) : filename;\n  }\n\n  getTemplate(name, eagerCompile, parentName, ignoreMissing, cb) {\n    var that = this;\n    var tmpl = null;\n    if (name && name.raw) {\n      // this fixes autoescape for templates referenced in symbols\n      name = name.raw;\n    }\n\n    if (lib.isFunction(parentName)) {\n      cb = parentName;\n      parentName = null;\n      eagerCompile = eagerCompile || false;\n    }\n\n    if (lib.isFunction(eagerCompile)) {\n      cb = eagerCompile;\n      eagerCompile = false;\n    }\n\n    if (name instanceof Template) {\n      tmpl = name;\n    } else if (typeof name !== 'string') {\n      throw new Error('template names must be a string: ' + name);\n    } else {\n      for (let i = 0; i < this.loaders.length; i++) {\n        const loader = this.loaders[i];\n        tmpl = loader.cache[this.resolveTemplate(loader, parentName, name)];\n        if (tmpl) {\n          break;\n        }\n      }\n    }\n\n    if (tmpl) {\n      if (eagerCompile) {\n        tmpl.compile();\n      }\n\n      if (cb) {\n        cb(null, tmpl);\n        return undefined;\n      } else {\n        return tmpl;\n      }\n    }\n    let syncResult;\n\n    const createTemplate = (err, info) => {\n      if (!info && !err && !ignoreMissing) {\n        err = new Error('template not found: ' + name);\n      }\n\n      if (err) {\n        if (cb) {\n          cb(err);\n          return;\n        } else {\n          throw err;\n        }\n      }\n      let newTmpl;\n      if (!info) {\n        newTmpl = new Template(noopTmplSrc, this, '', eagerCompile);\n      } else {\n        newTmpl = new Template(info.src, this, info.path, eagerCompile);\n        if (!info.noCache) {\n          info.loader.cache[name] = newTmpl;\n        }\n      }\n      if (cb) {\n        cb(null, newTmpl);\n      } else {\n        syncResult = newTmpl;\n      }\n    };\n\n    lib.asyncIter(this.loaders, (loader, i, next, done) => {\n      function handle(err, src) {\n        if (err) {\n          done(err);\n        } else if (src) {\n          src.loader = loader;\n          done(null, src);\n        } else {\n          next();\n        }\n      }\n\n      // Resolve name relative to parentName\n      name = that.resolveTemplate(loader, parentName, name);\n\n      if (loader.async) {\n        loader.getSource(name, handle);\n      } else {\n        handle(null, loader.getSource(name));\n      }\n    }, createTemplate);\n\n    return syncResult;\n  }\n\n  express(app) {\n    return expressApp(this, app);\n  }\n\n  render(name, ctx, cb) {\n    if (lib.isFunction(ctx)) {\n      cb = ctx;\n      ctx = null;\n    }\n\n    // We support a synchronous API to make it easier to migrate\n    // existing code to async. This works because if you don't do\n    // anything async work, the whole thing is actually run\n    // synchronously.\n    let syncResult = null;\n\n    this.getTemplate(name, (err, tmpl) => {\n      if (err && cb) {\n        callbackAsap(cb, err);\n      } else if (err) {\n        throw err;\n      } else {\n        syncResult = tmpl.render(ctx, cb);\n      }\n    });\n\n    return syncResult;\n  }\n\n  renderString(src, ctx, opts, cb) {\n    if (lib.isFunction(opts)) {\n      cb = opts;\n      opts = {};\n    }\n    opts = opts || {};\n\n    const tmpl = new Template(src, this, opts.path);\n    return tmpl.render(ctx, cb);\n  }\n\n  waterfall(tasks, callback, forceAsync) {\n    return waterfall(tasks, callback, forceAsync);\n  }\n}\n\nclass Context extends Obj {\n  init(ctx, blocks, env) {\n    // Has to be tied to an environment so we can tap into its globals.\n    this.env = env || new Environment();\n\n    // Make a duplicate of ctx\n    this.ctx = lib.extend({}, ctx);\n\n    this.blocks = {};\n    this.exported = [];\n\n    lib.keys(blocks).forEach(name => {\n      this.addBlock(name, blocks[name]);\n    });\n  }\n\n  lookup(name) {\n    // This is one of the most called functions, so optimize for\n    // the typical case where the name isn't in the globals\n    if (name in this.env.globals && !(name in this.ctx)) {\n      return this.env.globals[name];\n    } else {\n      return this.ctx[name];\n    }\n  }\n\n  setVariable(name, val) {\n    this.ctx[name] = val;\n  }\n\n  getVariables() {\n    return this.ctx;\n  }\n\n  addBlock(name, block) {\n    this.blocks[name] = this.blocks[name] || [];\n    this.blocks[name].push(block);\n    return this;\n  }\n\n  getBlock(name) {\n    if (!this.blocks[name]) {\n      throw new Error('unknown block \"' + name + '\"');\n    }\n\n    return this.blocks[name][0];\n  }\n\n  getSuper(env, name, block, frame, runtime, cb) {\n    var idx = lib.indexOf(this.blocks[name] || [], block);\n    var blk = this.blocks[name][idx + 1];\n    var context = this;\n\n    if (idx === -1 || !blk) {\n      throw new Error('no super block available for \"' + name + '\"');\n    }\n\n    blk(env, context, frame, runtime, cb);\n  }\n\n  addExport(name) {\n    this.exported.push(name);\n  }\n\n  getExported() {\n    var exported = {};\n    this.exported.forEach((name) => {\n      exported[name] = this.ctx[name];\n    });\n    return exported;\n  }\n}\n\nclass Template extends Obj {\n  init(src, env, path, eagerCompile) {\n    this.env = env || new Environment();\n\n    if (lib.isObject(src)) {\n      switch (src.type) {\n        case 'code':\n          this.tmplProps = src.obj;\n          break;\n        case 'string':\n          this.tmplStr = src.obj;\n          break;\n        default:\n          throw new Error(\n            `Unexpected template object type ${src.type}; expected 'code', or 'string'`);\n      }\n    } else if (lib.isString(src)) {\n      this.tmplStr = src;\n    } else {\n      throw new Error('src must be a string or an object describing the source');\n    }\n\n    this.path = path;\n\n    if (eagerCompile) {\n      try {\n        this._compile();\n      } catch (err) {\n        throw lib._prettifyError(this.path, this.env.opts.dev, err);\n      }\n    } else {\n      this.compiled = false;\n    }\n  }\n\n  render(ctx, parentFrame, cb) {\n    if (typeof ctx === 'function') {\n      cb = ctx;\n      ctx = {};\n    } else if (typeof parentFrame === 'function') {\n      cb = parentFrame;\n      parentFrame = null;\n    }\n\n    // If there is a parent frame, we are being called from internal\n    // code of another template, and the internal system\n    // depends on the sync/async nature of the parent template\n    // to be inherited, so force an async callback\n    const forceAsync = !parentFrame;\n\n    // Catch compile errors for async rendering\n    try {\n      this.compile();\n    } catch (e) {\n      const err = lib._prettifyError(this.path, this.env.opts.dev, e);\n      if (cb) {\n        return callbackAsap(cb, err);\n      } else {\n        throw err;\n      }\n    }\n\n    const context = new Context(ctx || {}, this.blocks, this.env);\n    const frame = parentFrame ? parentFrame.push(true) : new Frame();\n    frame.topLevel = true;\n    let syncResult = null;\n    let didError = false;\n\n    this.rootRenderFunc(this.env, context, frame, globalRuntime, (err, res) => {\n      // TODO: this is actually a bug in the compiled template (because waterfall\n      // tasks are both not passing errors up the chain of callbacks AND are not\n      // causing a return from the top-most render function). But fixing that\n      // will require a more substantial change to the compiler.\n      if (didError && cb && typeof res !== 'undefined') {\n        // prevent multiple calls to cb\n        return;\n      }\n\n      if (err) {\n        err = lib._prettifyError(this.path, this.env.opts.dev, err);\n        didError = true;\n      }\n\n      if (cb) {\n        if (forceAsync) {\n          callbackAsap(cb, err, res);\n        } else {\n          cb(err, res);\n        }\n      } else {\n        if (err) {\n          throw err;\n        }\n        syncResult = res;\n      }\n    });\n\n    return syncResult;\n  }\n\n\n  getExported(ctx, parentFrame, cb) { // eslint-disable-line consistent-return\n    if (typeof ctx === 'function') {\n      cb = ctx;\n      ctx = {};\n    }\n\n    if (typeof parentFrame === 'function') {\n      cb = parentFrame;\n      parentFrame = null;\n    }\n\n    // Catch compile errors for async rendering\n    try {\n      this.compile();\n    } catch (e) {\n      if (cb) {\n        return cb(e);\n      } else {\n        throw e;\n      }\n    }\n\n    const frame = parentFrame ? parentFrame.push() : new Frame();\n    frame.topLevel = true;\n\n    // Run the rootRenderFunc to populate the context with exported vars\n    const context = new Context(ctx || {}, this.blocks, this.env);\n    this.rootRenderFunc(this.env, context, frame, globalRuntime, (err) => {\n      if (err) {\n        cb(err, null);\n      } else {\n        cb(null, context.getExported());\n      }\n    });\n  }\n\n  compile() {\n    if (!this.compiled) {\n      this._compile();\n    }\n  }\n\n  _compile() {\n    var props;\n\n    if (this.tmplProps) {\n      props = this.tmplProps;\n    } else {\n      const source = compiler.compile(this.tmplStr,\n        this.env.asyncFilters,\n        this.env.extensionsList,\n        this.path,\n        this.env.opts);\n\n      const func = new Function(source); // eslint-disable-line no-new-func\n      props = func();\n    }\n\n    this.blocks = this._getBlocks(props);\n    this.rootRenderFunc = props.root;\n    this.compiled = true;\n  }\n\n  _getBlocks(props) {\n    var blocks = {};\n\n    lib.keys(props).forEach((k) => {\n      if (k.slice(0, 2) === 'b_') {\n        blocks[k.slice(2)] = props[k];\n      }\n    });\n\n    return blocks;\n  }\n}\n\nmodule.exports = {\n  Environment: Environment,\n  Template: Template\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/environment.js","'use strict';\n\nvar lexer = require('./lexer');\nvar nodes = require('./nodes');\nvar Obj = require('./object').Obj;\nvar lib = require('./lib');\n\nclass Parser extends Obj {\n  init(tokens) {\n    this.tokens = tokens;\n    this.peeked = null;\n    this.breakOnBlocks = null;\n    this.dropLeadingWhitespace = false;\n\n    this.extensions = [];\n  }\n\n  nextToken(withWhitespace) {\n    var tok;\n\n    if (this.peeked) {\n      if (!withWhitespace && this.peeked.type === lexer.TOKEN_WHITESPACE) {\n        this.peeked = null;\n      } else {\n        tok = this.peeked;\n        this.peeked = null;\n        return tok;\n      }\n    }\n\n    tok = this.tokens.nextToken();\n\n    if (!withWhitespace) {\n      while (tok && tok.type === lexer.TOKEN_WHITESPACE) {\n        tok = this.tokens.nextToken();\n      }\n    }\n\n    return tok;\n  }\n\n  peekToken() {\n    this.peeked = this.peeked || this.nextToken();\n    return this.peeked;\n  }\n\n  pushToken(tok) {\n    if (this.peeked) {\n      throw new Error('pushToken: can only push one token on between reads');\n    }\n    this.peeked = tok;\n  }\n\n  error(msg, lineno, colno) {\n    if (lineno === undefined || colno === undefined) {\n      const tok = this.peekToken() || {};\n      lineno = tok.lineno;\n      colno = tok.colno;\n    }\n    if (lineno !== undefined) {\n      lineno += 1;\n    }\n    if (colno !== undefined) {\n      colno += 1;\n    }\n    return new lib.TemplateError(msg, lineno, colno);\n  }\n\n  fail(msg, lineno, colno) {\n    throw this.error(msg, lineno, colno);\n  }\n\n  skip(type) {\n    var tok = this.nextToken();\n    if (!tok || tok.type !== type) {\n      this.pushToken(tok);\n      return false;\n    }\n    return true;\n  }\n\n  expect(type) {\n    var tok = this.nextToken();\n    if (tok.type !== type) {\n      this.fail('expected ' + type + ', got ' + tok.type,\n        tok.lineno,\n        tok.colno);\n    }\n    return tok;\n  }\n\n  skipValue(type, val) {\n    var tok = this.nextToken();\n    if (!tok || tok.type !== type || tok.value !== val) {\n      this.pushToken(tok);\n      return false;\n    }\n    return true;\n  }\n\n  skipSymbol(val) {\n    return this.skipValue(lexer.TOKEN_SYMBOL, val);\n  }\n\n  advanceAfterBlockEnd(name) {\n    var tok;\n    if (!name) {\n      tok = this.peekToken();\n\n      if (!tok) {\n        this.fail('unexpected end of file');\n      }\n\n      if (tok.type !== lexer.TOKEN_SYMBOL) {\n        this.fail('advanceAfterBlockEnd: expected symbol token or ' +\n          'explicit name to be passed');\n      }\n\n      name = this.nextToken().value;\n    }\n\n    tok = this.nextToken();\n\n    if (tok && tok.type === lexer.TOKEN_BLOCK_END) {\n      if (tok.value.charAt(0) === '-') {\n        this.dropLeadingWhitespace = true;\n      }\n    } else {\n      this.fail('expected block end in ' + name + ' statement');\n    }\n\n    return tok;\n  }\n\n  advanceAfterVariableEnd() {\n    var tok = this.nextToken();\n\n    if (tok && tok.type === lexer.TOKEN_VARIABLE_END) {\n      this.dropLeadingWhitespace = tok.value.charAt(\n        tok.value.length - this.tokens.tags.VARIABLE_END.length - 1\n      ) === '-';\n    } else {\n      this.pushToken(tok);\n      this.fail('expected variable end');\n    }\n  }\n\n  parseFor() {\n    var forTok = this.peekToken();\n    var node;\n    var endBlock;\n\n    if (this.skipSymbol('for')) {\n      node = new nodes.For(forTok.lineno, forTok.colno);\n      endBlock = 'endfor';\n    } else if (this.skipSymbol('asyncEach')) {\n      node = new nodes.AsyncEach(forTok.lineno, forTok.colno);\n      endBlock = 'endeach';\n    } else if (this.skipSymbol('asyncAll')) {\n      node = new nodes.AsyncAll(forTok.lineno, forTok.colno);\n      endBlock = 'endall';\n    } else {\n      this.fail('parseFor: expected for{Async}', forTok.lineno, forTok.colno);\n    }\n\n    node.name = this.parsePrimary();\n\n    if (!(node.name instanceof nodes.Symbol)) {\n      this.fail('parseFor: variable name expected for loop');\n    }\n\n    const type = this.peekToken().type;\n    if (type === lexer.TOKEN_COMMA) {\n      // key/value iteration\n      const key = node.name;\n      node.name = new nodes.Array(key.lineno, key.colno);\n      node.name.addChild(key);\n\n      while (this.skip(lexer.TOKEN_COMMA)) {\n        const prim = this.parsePrimary();\n        node.name.addChild(prim);\n      }\n    }\n\n    if (!this.skipSymbol('in')) {\n      this.fail('parseFor: expected \"in\" keyword for loop',\n        forTok.lineno,\n        forTok.colno);\n    }\n\n    node.arr = this.parseExpression();\n    this.advanceAfterBlockEnd(forTok.value);\n\n    node.body = this.parseUntilBlocks(endBlock, 'else');\n\n    if (this.skipSymbol('else')) {\n      this.advanceAfterBlockEnd('else');\n      node.else_ = this.parseUntilBlocks(endBlock);\n    }\n\n    this.advanceAfterBlockEnd();\n\n    return node;\n  }\n\n  parseMacro() {\n    const macroTok = this.peekToken();\n    if (!this.skipSymbol('macro')) {\n      this.fail('expected macro');\n    }\n\n    const name = this.parsePrimary(true);\n    const args = this.parseSignature();\n    const node = new nodes.Macro(macroTok.lineno, macroTok.colno, name, args);\n\n    this.advanceAfterBlockEnd(macroTok.value);\n    node.body = this.parseUntilBlocks('endmacro');\n    this.advanceAfterBlockEnd();\n\n    return node;\n  }\n\n  parseCall() {\n    // a call block is parsed as a normal FunCall, but with an added\n    // 'caller' kwarg which is a Caller node.\n    var callTok = this.peekToken();\n    if (!this.skipSymbol('call')) {\n      this.fail('expected call');\n    }\n\n    const callerArgs = this.parseSignature(true) || new nodes.NodeList();\n    const macroCall = this.parsePrimary();\n\n    this.advanceAfterBlockEnd(callTok.value);\n    const body = this.parseUntilBlocks('endcall');\n    this.advanceAfterBlockEnd();\n\n    const callerName = new nodes.Symbol(callTok.lineno,\n      callTok.colno,\n      'caller');\n    const callerNode = new nodes.Caller(callTok.lineno,\n      callTok.colno,\n      callerName,\n      callerArgs,\n      body);\n\n    // add the additional caller kwarg, adding kwargs if necessary\n    const args = macroCall.args.children;\n    if (!(args[args.length - 1] instanceof nodes.KeywordArgs)) {\n      args.push(new nodes.KeywordArgs());\n    }\n    const kwargs = args[args.length - 1];\n    kwargs.addChild(new nodes.Pair(callTok.lineno,\n      callTok.colno,\n      callerName,\n      callerNode));\n\n    return new nodes.Output(callTok.lineno,\n      callTok.colno,\n      [macroCall]);\n  }\n\n  parseWithContext() {\n    var tok = this.peekToken();\n\n    var withContext = null;\n\n    if (this.skipSymbol('with')) {\n      withContext = true;\n    } else if (this.skipSymbol('without')) {\n      withContext = false;\n    }\n\n    if (withContext !== null) {\n      if (!this.skipSymbol('context')) {\n        this.fail('parseFrom: expected context after with/without',\n          tok.lineno,\n          tok.colno);\n      }\n    }\n\n    return withContext;\n  }\n\n  parseImport() {\n    var importTok = this.peekToken();\n    if (!this.skipSymbol('import')) {\n      this.fail('parseImport: expected import',\n        importTok.lineno,\n        importTok.colno);\n    }\n\n    const template = this.parseExpression();\n\n    if (!this.skipSymbol('as')) {\n      this.fail('parseImport: expected \"as\" keyword',\n        importTok.lineno,\n        importTok.colno);\n    }\n\n    const target = this.parseExpression();\n    const withContext = this.parseWithContext();\n    const node = new nodes.Import(importTok.lineno,\n      importTok.colno,\n      template,\n      target,\n      withContext);\n\n    this.advanceAfterBlockEnd(importTok.value);\n\n    return node;\n  }\n\n  parseFrom() {\n    const fromTok = this.peekToken();\n    if (!this.skipSymbol('from')) {\n      this.fail('parseFrom: expected from');\n    }\n\n    const template = this.parseExpression();\n\n    if (!this.skipSymbol('import')) {\n      this.fail('parseFrom: expected import',\n        fromTok.lineno,\n        fromTok.colno);\n    }\n\n    const names = new nodes.NodeList();\n    let withContext;\n\n    while (1) { // eslint-disable-line no-constant-condition\n      const nextTok = this.peekToken();\n      if (nextTok.type === lexer.TOKEN_BLOCK_END) {\n        if (!names.children.length) {\n          this.fail('parseFrom: Expected at least one import name',\n            fromTok.lineno,\n            fromTok.colno);\n        }\n\n        // Since we are manually advancing past the block end,\n        // need to keep track of whitespace control (normally\n        // this is done in `advanceAfterBlockEnd`\n        if (nextTok.value.charAt(0) === '-') {\n          this.dropLeadingWhitespace = true;\n        }\n\n        this.nextToken();\n        break;\n      }\n\n      if (names.children.length > 0 && !this.skip(lexer.TOKEN_COMMA)) {\n        this.fail('parseFrom: expected comma',\n          fromTok.lineno,\n          fromTok.colno);\n      }\n\n      const name = this.parsePrimary();\n      if (name.value.charAt(0) === '_') {\n        this.fail('parseFrom: names starting with an underscore cannot be imported',\n          name.lineno,\n          name.colno);\n      }\n\n      if (this.skipSymbol('as')) {\n        const alias = this.parsePrimary();\n        names.addChild(new nodes.Pair(name.lineno,\n          name.colno,\n          name,\n          alias));\n      } else {\n        names.addChild(name);\n      }\n\n      withContext = this.parseWithContext();\n    }\n\n    return new nodes.FromImport(fromTok.lineno,\n      fromTok.colno,\n      template,\n      names,\n      withContext);\n  }\n\n  parseBlock() {\n    const tag = this.peekToken();\n    if (!this.skipSymbol('block')) {\n      this.fail('parseBlock: expected block', tag.lineno, tag.colno);\n    }\n\n    const node = new nodes.Block(tag.lineno, tag.colno);\n\n    node.name = this.parsePrimary();\n    if (!(node.name instanceof nodes.Symbol)) {\n      this.fail('parseBlock: variable name expected',\n        tag.lineno,\n        tag.colno);\n    }\n\n    this.advanceAfterBlockEnd(tag.value);\n\n    node.body = this.parseUntilBlocks('endblock');\n    this.skipSymbol('endblock');\n    this.skipSymbol(node.name.value);\n\n    const tok = this.peekToken();\n    if (!tok) {\n      this.fail('parseBlock: expected endblock, got end of file');\n    }\n\n    this.advanceAfterBlockEnd(tok.value);\n\n    return node;\n  }\n\n  parseExtends() {\n    const tagName = 'extends';\n    const tag = this.peekToken();\n    if (!this.skipSymbol(tagName)) {\n      this.fail('parseTemplateRef: expected ' + tagName);\n    }\n\n    const node = new nodes.Extends(tag.lineno, tag.colno);\n    node.template = this.parseExpression();\n\n    this.advanceAfterBlockEnd(tag.value);\n    return node;\n  }\n\n  parseInclude() {\n    const tagName = 'include';\n    const tag = this.peekToken();\n    if (!this.skipSymbol(tagName)) {\n      this.fail('parseInclude: expected ' + tagName);\n    }\n\n    const node = new nodes.Include(tag.lineno, tag.colno);\n    node.template = this.parseExpression();\n\n    if (this.skipSymbol('ignore') && this.skipSymbol('missing')) {\n      node.ignoreMissing = true;\n    }\n\n    this.advanceAfterBlockEnd(tag.value);\n    return node;\n  }\n\n  parseIf() {\n    const tag = this.peekToken();\n    let node;\n\n    if (this.skipSymbol('if') || this.skipSymbol('elif') || this.skipSymbol('elseif')) {\n      node = new nodes.If(tag.lineno, tag.colno);\n    } else if (this.skipSymbol('ifAsync')) {\n      node = new nodes.IfAsync(tag.lineno, tag.colno);\n    } else {\n      this.fail('parseIf: expected if, elif, or elseif',\n        tag.lineno,\n        tag.colno);\n    }\n\n    node.cond = this.parseExpression();\n    this.advanceAfterBlockEnd(tag.value);\n\n    node.body = this.parseUntilBlocks('elif', 'elseif', 'else', 'endif');\n    const tok = this.peekToken();\n\n    switch (tok && tok.value) {\n      case 'elseif':\n      case 'elif':\n        node.else_ = this.parseIf();\n        break;\n      case 'else':\n        this.advanceAfterBlockEnd();\n        node.else_ = this.parseUntilBlocks('endif');\n        this.advanceAfterBlockEnd();\n        break;\n      case 'endif':\n        node.else_ = null;\n        this.advanceAfterBlockEnd();\n        break;\n      default:\n        this.fail('parseIf: expected elif, else, or endif, got end of file');\n    }\n\n    return node;\n  }\n\n  parseSet() {\n    const tag = this.peekToken();\n    if (!this.skipSymbol('set')) {\n      this.fail('parseSet: expected set', tag.lineno, tag.colno);\n    }\n\n    const node = new nodes.Set(tag.lineno, tag.colno, []);\n\n    let target;\n    while ((target = this.parsePrimary())) {\n      node.targets.push(target);\n\n      if (!this.skip(lexer.TOKEN_COMMA)) {\n        break;\n      }\n    }\n\n    if (!this.skipValue(lexer.TOKEN_OPERATOR, '=')) {\n      if (!this.skip(lexer.TOKEN_BLOCK_END)) {\n        this.fail('parseSet: expected = or block end in set tag',\n          tag.lineno,\n          tag.colno);\n      } else {\n        node.body = new nodes.Capture(\n          tag.lineno,\n          tag.colno,\n          this.parseUntilBlocks('endset')\n        );\n        node.value = null;\n        this.advanceAfterBlockEnd();\n      }\n    } else {\n      node.value = this.parseExpression();\n      this.advanceAfterBlockEnd(tag.value);\n    }\n\n    return node;\n  }\n\n  parseSwitch() {\n    /*\n     * Store the tag names in variables in case someone ever wants to\n     * customize this.\n     */\n    const switchStart = 'switch';\n    const switchEnd = 'endswitch';\n    const caseStart = 'case';\n    const caseDefault = 'default';\n\n    // Get the switch tag.\n    const tag = this.peekToken();\n\n    // fail early if we get some unexpected tag.\n    if (\n      !this.skipSymbol(switchStart)\n      && !this.skipSymbol(caseStart)\n      && !this.skipSymbol(caseDefault)\n    ) {\n      this.fail('parseSwitch: expected \"switch,\" \"case\" or \"default\"', tag.lineno, tag.colno);\n    }\n\n    // parse the switch expression\n    const expr = this.parseExpression();\n\n    // advance until a start of a case, a default case or an endswitch.\n    this.advanceAfterBlockEnd(switchStart);\n    this.parseUntilBlocks(caseStart, caseDefault, switchEnd);\n\n    // this is the first case. it could also be an endswitch, we'll check.\n    let tok = this.peekToken();\n\n    // create new variables for our cases and default case.\n    const cases = [];\n    let defaultCase;\n\n    // while we're dealing with new cases nodes...\n    do {\n      // skip the start symbol and get the case expression\n      this.skipSymbol(caseStart);\n      const cond = this.parseExpression();\n      this.advanceAfterBlockEnd(switchStart);\n      // get the body of the case node and add it to the array of cases.\n      const body = this.parseUntilBlocks(caseStart, caseDefault, switchEnd);\n      cases.push(new nodes.Case(tok.line, tok.col, cond, body));\n      // get our next case\n      tok = this.peekToken();\n    } while (tok && tok.value === caseStart);\n\n    // we either have a default case or a switch end.\n    switch (tok.value) {\n      case caseDefault:\n        this.advanceAfterBlockEnd();\n        defaultCase = this.parseUntilBlocks(switchEnd);\n        this.advanceAfterBlockEnd();\n        break;\n      case switchEnd:\n        this.advanceAfterBlockEnd();\n        break;\n      default:\n        // otherwise bail because EOF\n        this.fail('parseSwitch: expected \"case,\" \"default\" or \"endswitch,\" got EOF.');\n    }\n\n    // and return the switch node.\n    return new nodes.Switch(tag.lineno, tag.colno, expr, cases, defaultCase);\n  }\n\n  parseStatement() {\n    var tok = this.peekToken();\n    var node;\n\n    if (tok.type !== lexer.TOKEN_SYMBOL) {\n      this.fail('tag name expected', tok.lineno, tok.colno);\n    }\n\n    if (this.breakOnBlocks &&\n      lib.indexOf(this.breakOnBlocks, tok.value) !== -1) {\n      return null;\n    }\n\n    switch (tok.value) {\n      case 'raw':\n        return this.parseRaw();\n      case 'verbatim':\n        return this.parseRaw('verbatim');\n      case 'if':\n      case 'ifAsync':\n        return this.parseIf();\n      case 'for':\n      case 'asyncEach':\n      case 'asyncAll':\n        return this.parseFor();\n      case 'block':\n        return this.parseBlock();\n      case 'extends':\n        return this.parseExtends();\n      case 'include':\n        return this.parseInclude();\n      case 'set':\n        return this.parseSet();\n      case 'macro':\n        return this.parseMacro();\n      case 'call':\n        return this.parseCall();\n      case 'import':\n        return this.parseImport();\n      case 'from':\n        return this.parseFrom();\n      case 'filter':\n        return this.parseFilterStatement();\n      case 'switch':\n        return this.parseSwitch();\n      default:\n        if (this.extensions.length) {\n          for (let i = 0; i < this.extensions.length; i++) {\n            const ext = this.extensions[i];\n            if (lib.indexOf(ext.tags || [], tok.value) !== -1) {\n              return ext.parse(this, nodes, lexer);\n            }\n          }\n        }\n        this.fail('unknown block tag: ' + tok.value, tok.lineno, tok.colno);\n    }\n\n    return node;\n  }\n\n  parseRaw(tagName) {\n    tagName = tagName || 'raw';\n    const endTagName = 'end' + tagName;\n    // Look for upcoming raw blocks (ignore all other kinds of blocks)\n    const rawBlockRegex = new RegExp('([\\\\s\\\\S]*?){%\\\\s*(' + tagName + '|' + endTagName + ')\\\\s*(?=%})%}');\n    let rawLevel = 1;\n    let str = '';\n    let matches = null;\n\n    // Skip opening raw token\n    // Keep this token to track line and column numbers\n    const begun = this.advanceAfterBlockEnd();\n\n    // Exit when there's nothing to match\n    // or when we've found the matching \"endraw\" block\n    while ((matches = this.tokens._extractRegex(rawBlockRegex)) && rawLevel > 0) {\n      const all = matches[0];\n      const pre = matches[1];\n      const blockName = matches[2];\n\n      // Adjust rawlevel\n      if (blockName === tagName) {\n        rawLevel += 1;\n      } else if (blockName === endTagName) {\n        rawLevel -= 1;\n      }\n\n      // Add to str\n      if (rawLevel === 0) {\n        // We want to exclude the last \"endraw\"\n        str += pre;\n        // Move tokenizer to beginning of endraw block\n        this.tokens.backN(all.length - pre.length);\n      } else {\n        str += all;\n      }\n    }\n\n    return new nodes.Output(\n      begun.lineno,\n      begun.colno,\n      [new nodes.TemplateData(begun.lineno, begun.colno, str)]\n    );\n  }\n\n  parsePostfix(node) {\n    let lookup;\n    let tok = this.peekToken();\n\n    while (tok) {\n      if (tok.type === lexer.TOKEN_LEFT_PAREN) {\n        // Function call\n        node = new nodes.FunCall(tok.lineno,\n          tok.colno,\n          node,\n          this.parseSignature());\n      } else if (tok.type === lexer.TOKEN_LEFT_BRACKET) {\n        // Reference\n        lookup = this.parseAggregate();\n        if (lookup.children.length > 1) {\n          this.fail('invalid index');\n        }\n\n        node = new nodes.LookupVal(tok.lineno,\n          tok.colno,\n          node,\n          lookup.children[0]);\n      } else if (tok.type === lexer.TOKEN_OPERATOR && tok.value === '.') {\n        // Reference\n        this.nextToken();\n        const val = this.nextToken();\n\n        if (val.type !== lexer.TOKEN_SYMBOL) {\n          this.fail('expected name as lookup value, got ' + val.value,\n            val.lineno,\n            val.colno);\n        }\n\n        // Make a literal string because it's not a variable\n        // reference\n        lookup = new nodes.Literal(val.lineno,\n          val.colno,\n          val.value);\n\n        node = new nodes.LookupVal(tok.lineno,\n          tok.colno,\n          node,\n          lookup);\n      } else {\n        break;\n      }\n\n      tok = this.peekToken();\n    }\n\n    return node;\n  }\n\n  parseExpression() {\n    var node = this.parseInlineIf();\n    return node;\n  }\n\n  parseInlineIf() {\n    let node = this.parseOr();\n    if (this.skipSymbol('if')) {\n      const condNode = this.parseOr();\n      const bodyNode = node;\n      node = new nodes.InlineIf(node.lineno, node.colno);\n      node.body = bodyNode;\n      node.cond = condNode;\n      if (this.skipSymbol('else')) {\n        node.else_ = this.parseOr();\n      } else {\n        node.else_ = null;\n      }\n    }\n\n    return node;\n  }\n\n  parseOr() {\n    let node = this.parseAnd();\n    while (this.skipSymbol('or')) {\n      const node2 = this.parseAnd();\n      node = new nodes.Or(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseAnd() {\n    let node = this.parseNot();\n    while (this.skipSymbol('and')) {\n      const node2 = this.parseNot();\n      node = new nodes.And(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseNot() {\n    const tok = this.peekToken();\n    if (this.skipSymbol('not')) {\n      return new nodes.Not(tok.lineno,\n        tok.colno,\n        this.parseNot());\n    }\n    return this.parseIn();\n  }\n\n  parseIn() {\n    let node = this.parseIs();\n    while (1) { // eslint-disable-line no-constant-condition\n      // check if the next token is 'not'\n      const tok = this.nextToken();\n      if (!tok) {\n        break;\n      }\n      const invert = tok.type === lexer.TOKEN_SYMBOL && tok.value === 'not';\n      // if it wasn't 'not', put it back\n      if (!invert) {\n        this.pushToken(tok);\n      }\n      if (this.skipSymbol('in')) {\n        const node2 = this.parseIs();\n        node = new nodes.In(node.lineno,\n          node.colno,\n          node,\n          node2);\n        if (invert) {\n          node = new nodes.Not(node.lineno,\n            node.colno,\n            node);\n        }\n      } else {\n        // if we'd found a 'not' but this wasn't an 'in', put back the 'not'\n        if (invert) {\n          this.pushToken(tok);\n        }\n        break;\n      }\n    }\n    return node;\n  }\n\n  // I put this right after \"in\" in the operator precedence stack. That can\n  // obviously be changed to be closer to Jinja.\n  parseIs() {\n    let node = this.parseCompare();\n    // look for an is\n    if (this.skipSymbol('is')) {\n      // look for a not\n      const not = this.skipSymbol('not');\n      // get the next node\n      const node2 = this.parseCompare();\n      // create an Is node using the next node and the info from our Is node.\n      node = new nodes.Is(node.lineno, node.colno, node, node2);\n      // if we have a Not, create a Not node from our Is node.\n      if (not) {\n        node = new nodes.Not(node.lineno, node.colno, node);\n      }\n    }\n    // return the node.\n    return node;\n  }\n\n  parseCompare() {\n    const compareOps = ['==', '===', '!=', '!==', '<', '>', '<=', '>='];\n    const expr = this.parseConcat();\n    const ops = [];\n\n    while (1) { // eslint-disable-line no-constant-condition\n      const tok = this.nextToken();\n\n      if (!tok) {\n        break;\n      } else if (compareOps.indexOf(tok.value) !== -1) {\n        ops.push(new nodes.CompareOperand(tok.lineno,\n          tok.colno,\n          this.parseConcat(),\n          tok.value));\n      } else {\n        this.pushToken(tok);\n        break;\n      }\n    }\n\n    if (ops.length) {\n      return new nodes.Compare(ops[0].lineno,\n        ops[0].colno,\n        expr,\n        ops);\n    } else {\n      return expr;\n    }\n  }\n\n  // finds the '~' for string concatenation\n  parseConcat() {\n    let node = this.parseAdd();\n    while (this.skipValue(lexer.TOKEN_TILDE, '~')) {\n      const node2 = this.parseAdd();\n      node = new nodes.Concat(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseAdd() {\n    let node = this.parseSub();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '+')) {\n      const node2 = this.parseSub();\n      node = new nodes.Add(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseSub() {\n    let node = this.parseMul();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '-')) {\n      const node2 = this.parseMul();\n      node = new nodes.Sub(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseMul() {\n    let node = this.parseDiv();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '*')) {\n      const node2 = this.parseDiv();\n      node = new nodes.Mul(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseDiv() {\n    let node = this.parseFloorDiv();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '/')) {\n      const node2 = this.parseFloorDiv();\n      node = new nodes.Div(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseFloorDiv() {\n    let node = this.parseMod();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '//')) {\n      const node2 = this.parseMod();\n      node = new nodes.FloorDiv(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseMod() {\n    let node = this.parsePow();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '%')) {\n      const node2 = this.parsePow();\n      node = new nodes.Mod(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parsePow() {\n    let node = this.parseUnary();\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '**')) {\n      const node2 = this.parseUnary();\n      node = new nodes.Pow(node.lineno,\n        node.colno,\n        node,\n        node2);\n    }\n    return node;\n  }\n\n  parseUnary(noFilters) {\n    const tok = this.peekToken();\n    let node;\n\n    if (this.skipValue(lexer.TOKEN_OPERATOR, '-')) {\n      node = new nodes.Neg(tok.lineno,\n        tok.colno,\n        this.parseUnary(true));\n    } else if (this.skipValue(lexer.TOKEN_OPERATOR, '+')) {\n      node = new nodes.Pos(tok.lineno,\n        tok.colno,\n        this.parseUnary(true));\n    } else {\n      node = this.parsePrimary();\n    }\n\n    if (!noFilters) {\n      node = this.parseFilter(node);\n    }\n\n    return node;\n  }\n\n  parsePrimary(noPostfix) {\n    const tok = this.nextToken();\n    let val;\n    let node = null;\n\n    if (!tok) {\n      this.fail('expected expression, got end of file');\n    } else if (tok.type === lexer.TOKEN_STRING) {\n      val = tok.value;\n    } else if (tok.type === lexer.TOKEN_INT) {\n      val = parseInt(tok.value, 10);\n    } else if (tok.type === lexer.TOKEN_FLOAT) {\n      val = parseFloat(tok.value);\n    } else if (tok.type === lexer.TOKEN_BOOLEAN) {\n      if (tok.value === 'true') {\n        val = true;\n      } else if (tok.value === 'false') {\n        val = false;\n      } else {\n        this.fail('invalid boolean: ' + tok.value,\n          tok.lineno,\n          tok.colno);\n      }\n    } else if (tok.type === lexer.TOKEN_NONE) {\n      val = null;\n    } else if (tok.type === lexer.TOKEN_REGEX) {\n      val = new RegExp(tok.value.body, tok.value.flags);\n    }\n\n    if (val !== undefined) {\n      node = new nodes.Literal(tok.lineno, tok.colno, val);\n    } else if (tok.type === lexer.TOKEN_SYMBOL) {\n      node = new nodes.Symbol(tok.lineno, tok.colno, tok.value);\n    } else {\n      // See if it's an aggregate type, we need to push the\n      // current delimiter token back on\n      this.pushToken(tok);\n      node = this.parseAggregate();\n    }\n\n    if (!noPostfix) {\n      node = this.parsePostfix(node);\n    }\n\n    if (node) {\n      return node;\n    } else {\n      throw this.error(`unexpected token: ${tok.value}`, tok.lineno, tok.colno);\n    }\n  }\n\n  parseFilterName() {\n    const tok = this.expect(lexer.TOKEN_SYMBOL);\n    let name = tok.value;\n\n    while (this.skipValue(lexer.TOKEN_OPERATOR, '.')) {\n      name += '.' + this.expect(lexer.TOKEN_SYMBOL).value;\n    }\n\n    return new nodes.Symbol(tok.lineno, tok.colno, name);\n  }\n\n  parseFilterArgs(node) {\n    if (this.peekToken().type === lexer.TOKEN_LEFT_PAREN) {\n      // Get a FunCall node and add the parameters to the\n      // filter\n      const call = this.parsePostfix(node);\n      return call.args.children;\n    }\n    return [];\n  }\n\n  parseFilter(node) {\n    while (this.skip(lexer.TOKEN_PIPE)) {\n      const name = this.parseFilterName();\n\n      node = new nodes.Filter(\n        name.lineno,\n        name.colno,\n        name,\n        new nodes.NodeList(\n          name.lineno,\n          name.colno,\n          [node].concat(this.parseFilterArgs(node))\n        )\n      );\n    }\n\n    return node;\n  }\n\n  parseFilterStatement() {\n    var filterTok = this.peekToken();\n    if (!this.skipSymbol('filter')) {\n      this.fail('parseFilterStatement: expected filter');\n    }\n\n    const name = this.parseFilterName();\n    const args = this.parseFilterArgs(name);\n\n    this.advanceAfterBlockEnd(filterTok.value);\n    const body = new nodes.Capture(\n      name.lineno,\n      name.colno,\n      this.parseUntilBlocks('endfilter')\n    );\n    this.advanceAfterBlockEnd();\n\n    const node = new nodes.Filter(\n      name.lineno,\n      name.colno,\n      name,\n      new nodes.NodeList(\n        name.lineno,\n        name.colno,\n        [body].concat(args)\n      )\n    );\n\n    return new nodes.Output(\n      name.lineno,\n      name.colno,\n      [node]\n    );\n  }\n\n  parseAggregate() {\n    var tok = this.nextToken();\n    var node;\n\n    switch (tok.type) {\n      case lexer.TOKEN_LEFT_PAREN:\n        node = new nodes.Group(tok.lineno, tok.colno);\n        break;\n      case lexer.TOKEN_LEFT_BRACKET:\n        node = new nodes.Array(tok.lineno, tok.colno);\n        break;\n      case lexer.TOKEN_LEFT_CURLY:\n        node = new nodes.Dict(tok.lineno, tok.colno);\n        break;\n      default:\n        return null;\n    }\n\n    while (1) { // eslint-disable-line no-constant-condition\n      const type = this.peekToken().type;\n      if (type === lexer.TOKEN_RIGHT_PAREN ||\n        type === lexer.TOKEN_RIGHT_BRACKET ||\n        type === lexer.TOKEN_RIGHT_CURLY) {\n        this.nextToken();\n        break;\n      }\n\n      if (node.children.length > 0) {\n        if (!this.skip(lexer.TOKEN_COMMA)) {\n          this.fail('parseAggregate: expected comma after expression',\n            tok.lineno,\n            tok.colno);\n        }\n      }\n\n      if (node instanceof nodes.Dict) {\n        // TODO: check for errors\n        const key = this.parsePrimary();\n\n        // We expect a key/value pair for dicts, separated by a\n        // colon\n        if (!this.skip(lexer.TOKEN_COLON)) {\n          this.fail('parseAggregate: expected colon after dict key',\n            tok.lineno,\n            tok.colno);\n        }\n\n        // TODO: check for errors\n        const value = this.parseExpression();\n        node.addChild(new nodes.Pair(key.lineno,\n          key.colno,\n          key,\n          value));\n      } else {\n        // TODO: check for errors\n        const expr = this.parseExpression();\n        node.addChild(expr);\n      }\n    }\n\n    return node;\n  }\n\n  parseSignature(tolerant, noParens) {\n    let tok = this.peekToken();\n    if (!noParens && tok.type !== lexer.TOKEN_LEFT_PAREN) {\n      if (tolerant) {\n        return null;\n      } else {\n        this.fail('expected arguments', tok.lineno, tok.colno);\n      }\n    }\n\n    if (tok.type === lexer.TOKEN_LEFT_PAREN) {\n      tok = this.nextToken();\n    }\n\n    const args = new nodes.NodeList(tok.lineno, tok.colno);\n    const kwargs = new nodes.KeywordArgs(tok.lineno, tok.colno);\n    let checkComma = false;\n\n    while (1) { // eslint-disable-line no-constant-condition\n      tok = this.peekToken();\n      if (!noParens && tok.type === lexer.TOKEN_RIGHT_PAREN) {\n        this.nextToken();\n        break;\n      } else if (noParens && tok.type === lexer.TOKEN_BLOCK_END) {\n        break;\n      }\n\n      if (checkComma && !this.skip(lexer.TOKEN_COMMA)) {\n        this.fail('parseSignature: expected comma after expression',\n          tok.lineno,\n          tok.colno);\n      } else {\n        const arg = this.parseExpression();\n\n        if (this.skipValue(lexer.TOKEN_OPERATOR, '=')) {\n          kwargs.addChild(\n            new nodes.Pair(arg.lineno,\n              arg.colno,\n              arg,\n              this.parseExpression())\n          );\n        } else {\n          args.addChild(arg);\n        }\n      }\n\n      checkComma = true;\n    }\n\n    if (kwargs.children.length) {\n      args.addChild(kwargs);\n    }\n\n    return args;\n  }\n\n  parseUntilBlocks(...blockNames) {\n    const prev = this.breakOnBlocks;\n    this.breakOnBlocks = blockNames;\n\n    const ret = this.parse();\n\n    this.breakOnBlocks = prev;\n    return ret;\n  }\n\n  parseNodes() {\n    let tok;\n    const buf = [];\n\n    while ((tok = this.nextToken())) {\n      if (tok.type === lexer.TOKEN_DATA) {\n        let data = tok.value;\n        const nextToken = this.peekToken();\n        const nextVal = nextToken && nextToken.value;\n\n        // If the last token has \"-\" we need to trim the\n        // leading whitespace of the data. This is marked with\n        // the `dropLeadingWhitespace` variable.\n        if (this.dropLeadingWhitespace) {\n          // TODO: this could be optimized (don't use regex)\n          data = data.replace(/^\\s*/, '');\n          this.dropLeadingWhitespace = false;\n        }\n\n        // Same for the succeeding block start token\n        if (nextToken &&\n          ((nextToken.type === lexer.TOKEN_BLOCK_START &&\n          nextVal.charAt(nextVal.length - 1) === '-') ||\n          (nextToken.type === lexer.TOKEN_VARIABLE_START &&\n          nextVal.charAt(this.tokens.tags.VARIABLE_START.length)\n          === '-') ||\n          (nextToken.type === lexer.TOKEN_COMMENT &&\n          nextVal.charAt(this.tokens.tags.COMMENT_START.length)\n          === '-'))) {\n          // TODO: this could be optimized (don't use regex)\n          data = data.replace(/\\s*$/, '');\n        }\n\n        buf.push(new nodes.Output(tok.lineno,\n          tok.colno,\n          [new nodes.TemplateData(tok.lineno,\n            tok.colno,\n            data)]));\n      } else if (tok.type === lexer.TOKEN_BLOCK_START) {\n        this.dropLeadingWhitespace = false;\n        const n = this.parseStatement();\n        if (!n) {\n          break;\n        }\n        buf.push(n);\n      } else if (tok.type === lexer.TOKEN_VARIABLE_START) {\n        const e = this.parseExpression();\n        this.dropLeadingWhitespace = false;\n        this.advanceAfterVariableEnd();\n        buf.push(new nodes.Output(tok.lineno, tok.colno, [e]));\n      } else if (tok.type === lexer.TOKEN_COMMENT) {\n        this.dropLeadingWhitespace = tok.value.charAt(\n          tok.value.length - this.tokens.tags.COMMENT_END.length - 1\n        ) === '-';\n      } else {\n        // Ignore comments, otherwise this should be an error\n        this.fail('Unexpected token at top-level: ' +\n          tok.type, tok.lineno, tok.colno);\n      }\n    }\n\n    return buf;\n  }\n\n  parse() {\n    return new nodes.NodeList(0, 0, this.parseNodes());\n  }\n\n  parseAsRoot() {\n    return new nodes.Root(0, 0, this.parseNodes());\n  }\n}\n\n// var util = require('util');\n\n// var l = lexer.lex('{%- if x -%}\\n hello {% endif %}');\n// var t;\n// while((t = l.nextToken())) {\n//     console.log(util.inspect(t));\n// }\n\n// var p = new Parser(lexer.lex('hello {% filter title %}' +\n//                              'Hello madam how are you' +\n//                              '{% endfilter %}'));\n// var n = p.parseAsRoot();\n// nodes.printNodes(n);\n\nmodule.exports = {\n  parse(src, extensions, opts) {\n    var p = new Parser(lexer.lex(src, opts));\n    if (extensions !== undefined) {\n      p.extensions = extensions;\n    }\n    return p.parseAsRoot();\n  },\n  Parser: Parser\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/parser.js","'use strict';\n\nconst lib = require('./lib');\n\nlet whitespaceChars = ' \\n\\t\\r\\u00A0';\nlet delimChars = '()[]{}%*-+~/#,:|.<>=!';\nlet intChars = '0123456789';\n\nlet BLOCK_START = '{%';\nlet BLOCK_END = '%}';\nlet VARIABLE_START = '{{';\nlet VARIABLE_END = '}}';\nlet COMMENT_START = '{#';\nlet COMMENT_END = '#}';\n\nlet TOKEN_STRING = 'string';\nlet TOKEN_WHITESPACE = 'whitespace';\nlet TOKEN_DATA = 'data';\nlet TOKEN_BLOCK_START = 'block-start';\nlet TOKEN_BLOCK_END = 'block-end';\nlet TOKEN_VARIABLE_START = 'variable-start';\nlet TOKEN_VARIABLE_END = 'variable-end';\nlet TOKEN_COMMENT = 'comment';\nlet TOKEN_LEFT_PAREN = 'left-paren';\nlet TOKEN_RIGHT_PAREN = 'right-paren';\nlet TOKEN_LEFT_BRACKET = 'left-bracket';\nlet TOKEN_RIGHT_BRACKET = 'right-bracket';\nlet TOKEN_LEFT_CURLY = 'left-curly';\nlet TOKEN_RIGHT_CURLY = 'right-curly';\nlet TOKEN_OPERATOR = 'operator';\nlet TOKEN_COMMA = 'comma';\nlet TOKEN_COLON = 'colon';\nlet TOKEN_TILDE = 'tilde';\nlet TOKEN_PIPE = 'pipe';\nlet TOKEN_INT = 'int';\nlet TOKEN_FLOAT = 'float';\nlet TOKEN_BOOLEAN = 'boolean';\nlet TOKEN_NONE = 'none';\nlet TOKEN_SYMBOL = 'symbol';\nlet TOKEN_SPECIAL = 'special';\nlet TOKEN_REGEX = 'regex';\n\nfunction token(type, value, lineno, colno) {\n  return {\n    type: type,\n    value: value,\n    lineno: lineno,\n    colno: colno\n  };\n}\n\nclass Tokenizer {\n  constructor(str, opts) {\n    this.str = str;\n    this.index = 0;\n    this.len = str.length;\n    this.lineno = 0;\n    this.colno = 0;\n\n    this.in_code = false;\n\n    opts = opts || {};\n\n    let tags = opts.tags || {};\n    this.tags = {\n      BLOCK_START: tags.blockStart || BLOCK_START,\n      BLOCK_END: tags.blockEnd || BLOCK_END,\n      VARIABLE_START: tags.variableStart || VARIABLE_START,\n      VARIABLE_END: tags.variableEnd || VARIABLE_END,\n      COMMENT_START: tags.commentStart || COMMENT_START,\n      COMMENT_END: tags.commentEnd || COMMENT_END\n    };\n\n    this.trimBlocks = !!opts.trimBlocks;\n    this.lstripBlocks = !!opts.lstripBlocks;\n  }\n\n  nextToken() {\n    let lineno = this.lineno;\n    let colno = this.colno;\n    let tok;\n\n    if (this.in_code) {\n      // Otherwise, if we are in a block parse it as code\n      let cur = this.current();\n\n      if (this.isFinished()) {\n        // We have nothing else to parse\n        return null;\n      } else if (cur === '\"' || cur === '\\'') {\n        // We've hit a string\n        return token(TOKEN_STRING, this._parseString(cur), lineno, colno);\n      } else if ((tok = this._extract(whitespaceChars))) {\n        // We hit some whitespace\n        return token(TOKEN_WHITESPACE, tok, lineno, colno);\n      } else if ((tok = this._extractString(this.tags.BLOCK_END)) ||\n        (tok = this._extractString('-' + this.tags.BLOCK_END))) {\n        // Special check for the block end tag\n        //\n        // It is a requirement that start and end tags are composed of\n        // delimiter characters (%{}[] etc), and our code always\n        // breaks on delimiters so we can assume the token parsing\n        // doesn't consume these elsewhere\n        this.in_code = false;\n        if (this.trimBlocks) {\n          cur = this.current();\n          if (cur === '\\n') {\n            // Skip newline\n            this.forward();\n          } else if (cur === '\\r') {\n            // Skip CRLF newline\n            this.forward();\n            cur = this.current();\n            if (cur === '\\n') {\n              this.forward();\n            } else {\n              // Was not a CRLF, so go back\n              this.back();\n            }\n          }\n        }\n        return token(TOKEN_BLOCK_END, tok, lineno, colno);\n      } else if ((tok = this._extractString(this.tags.VARIABLE_END)) ||\n        (tok = this._extractString('-' + this.tags.VARIABLE_END))) {\n        // Special check for variable end tag (see above)\n        this.in_code = false;\n        return token(TOKEN_VARIABLE_END, tok, lineno, colno);\n      } else if (cur === 'r' && this.str.charAt(this.index + 1) === '/') {\n        // Skip past 'r/'.\n        this.forwardN(2);\n\n        // Extract until the end of the regex -- / ends it, \\/ does not.\n        let regexBody = '';\n        while (!this.isFinished()) {\n          if (this.current() === '/' && this.previous() !== '\\\\') {\n            this.forward();\n            break;\n          } else {\n            regexBody += this.current();\n            this.forward();\n          }\n        }\n\n        // Check for flags.\n        // The possible flags are according to https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/RegExp)\n        let POSSIBLE_FLAGS = ['g', 'i', 'm', 'y'];\n        let regexFlags = '';\n        while (!this.isFinished()) {\n          let isCurrentAFlag = POSSIBLE_FLAGS.indexOf(this.current()) !== -1;\n          if (isCurrentAFlag) {\n            regexFlags += this.current();\n            this.forward();\n          } else {\n            break;\n          }\n        }\n\n        return token(TOKEN_REGEX, {\n          body: regexBody,\n          flags: regexFlags\n        }, lineno, colno);\n      } else if (delimChars.indexOf(cur) !== -1) {\n        // We've hit a delimiter (a special char like a bracket)\n        this.forward();\n        let complexOps = ['==', '===', '!=', '!==', '<=', '>=', '//', '**'];\n        let curComplex = cur + this.current();\n        let type;\n\n        if (lib.indexOf(complexOps, curComplex) !== -1) {\n          this.forward();\n          cur = curComplex;\n\n          // See if this is a strict equality/inequality comparator\n          if (lib.indexOf(complexOps, curComplex + this.current()) !== -1) {\n            cur = curComplex + this.current();\n            this.forward();\n          }\n        }\n\n        switch (cur) {\n          case '(':\n            type = TOKEN_LEFT_PAREN;\n            break;\n          case ')':\n            type = TOKEN_RIGHT_PAREN;\n            break;\n          case '[':\n            type = TOKEN_LEFT_BRACKET;\n            break;\n          case ']':\n            type = TOKEN_RIGHT_BRACKET;\n            break;\n          case '{':\n            type = TOKEN_LEFT_CURLY;\n            break;\n          case '}':\n            type = TOKEN_RIGHT_CURLY;\n            break;\n          case ',':\n            type = TOKEN_COMMA;\n            break;\n          case ':':\n            type = TOKEN_COLON;\n            break;\n          case '~':\n            type = TOKEN_TILDE;\n            break;\n          case '|':\n            type = TOKEN_PIPE;\n            break;\n          default:\n            type = TOKEN_OPERATOR;\n        }\n\n        return token(type, cur, lineno, colno);\n      } else {\n        // We are not at whitespace or a delimiter, so extract the\n        // text and parse it\n        tok = this._extractUntil(whitespaceChars + delimChars);\n\n        if (tok.match(/^[-+]?[0-9]+$/)) {\n          if (this.current() === '.') {\n            this.forward();\n            let dec = this._extract(intChars);\n            return token(TOKEN_FLOAT, tok + '.' + dec, lineno, colno);\n          } else {\n            return token(TOKEN_INT, tok, lineno, colno);\n          }\n        } else if (tok.match(/^(true|false)$/)) {\n          return token(TOKEN_BOOLEAN, tok, lineno, colno);\n        } else if (tok === 'none') {\n          return token(TOKEN_NONE, tok, lineno, colno);\n        /*\n         * Added to make the test `null is null` evaluate truthily.\n         * Otherwise, Nunjucks will look up null in the context and\n         * return `undefined`, which is not what we want. This *may* have\n         * consequences is someone is using null in their templates as a\n         * variable.\n         */\n        } else if (tok === 'null') {\n          return token(TOKEN_NONE, tok, lineno, colno);\n        } else if (tok) {\n          return token(TOKEN_SYMBOL, tok, lineno, colno);\n        } else {\n          throw new Error('Unexpected value while parsing: ' + tok);\n        }\n      }\n    } else {\n      // Parse out the template text, breaking on tag\n      // delimiters because we need to look for block/variable start\n      // tags (don't use the full delimChars for optimization)\n      let beginChars = (this.tags.BLOCK_START.charAt(0) +\n      this.tags.VARIABLE_START.charAt(0) +\n      this.tags.COMMENT_START.charAt(0) +\n      this.tags.COMMENT_END.charAt(0));\n\n      if (this.isFinished()) {\n        return null;\n      } else if ((tok = this._extractString(this.tags.BLOCK_START + '-')) ||\n        (tok = this._extractString(this.tags.BLOCK_START))) {\n        this.in_code = true;\n        return token(TOKEN_BLOCK_START, tok, lineno, colno);\n      } else if ((tok = this._extractString(this.tags.VARIABLE_START + '-')) ||\n        (tok = this._extractString(this.tags.VARIABLE_START))) {\n        this.in_code = true;\n        return token(TOKEN_VARIABLE_START, tok, lineno, colno);\n      } else {\n        tok = '';\n        let data;\n        let inComment = false;\n\n        if (this._matches(this.tags.COMMENT_START)) {\n          inComment = true;\n          tok = this._extractString(this.tags.COMMENT_START);\n        }\n\n        // Continually consume text, breaking on the tag delimiter\n        // characters and checking to see if it's a start tag.\n        //\n        // We could hit the end of the template in the middle of\n        // our looping, so check for the null return value from\n        // _extractUntil\n        while ((data = this._extractUntil(beginChars)) !== null) {\n          tok += data;\n\n          if ((this._matches(this.tags.BLOCK_START) ||\n            this._matches(this.tags.VARIABLE_START) ||\n            this._matches(this.tags.COMMENT_START)) &&\n            !inComment) {\n            if (this.lstripBlocks &&\n              this._matches(this.tags.BLOCK_START) &&\n              this.colno > 0 &&\n              this.colno <= tok.length) {\n              let lastLine = tok.slice(-this.colno);\n              if (/^\\s+$/.test(lastLine)) {\n                // Remove block leading whitespace from beginning of the string\n                tok = tok.slice(0, -this.colno);\n                if (!tok.length) {\n                  // All data removed, collapse to avoid unnecessary nodes\n                  // by returning next token (block start)\n                  return this.nextToken();\n                }\n              }\n            }\n            // If it is a start tag, stop looping\n            break;\n          } else if (this._matches(this.tags.COMMENT_END)) {\n            if (!inComment) {\n              throw new Error('unexpected end of comment');\n            }\n            tok += this._extractString(this.tags.COMMENT_END);\n            break;\n          } else {\n            // It does not match any tag, so add the character and\n            // carry on\n            tok += this.current();\n            this.forward();\n          }\n        }\n\n        if (data === null && inComment) {\n          throw new Error('expected end of comment, got end of file');\n        }\n\n        return token(inComment ? TOKEN_COMMENT : TOKEN_DATA,\n          tok,\n          lineno,\n          colno);\n      }\n    }\n  }\n\n  _parseString(delimiter) {\n    this.forward();\n\n    let str = '';\n\n    while (!this.isFinished() && this.current() !== delimiter) {\n      let cur = this.current();\n\n      if (cur === '\\\\') {\n        this.forward();\n        switch (this.current()) {\n          case 'n':\n            str += '\\n';\n            break;\n          case 't':\n            str += '\\t';\n            break;\n          case 'r':\n            str += '\\r';\n            break;\n          default:\n            str += this.current();\n        }\n        this.forward();\n      } else {\n        str += cur;\n        this.forward();\n      }\n    }\n\n    this.forward();\n    return str;\n  }\n\n  _matches(str) {\n    if (this.index + str.length > this.len) {\n      return null;\n    }\n\n    let m = this.str.slice(this.index, this.index + str.length);\n    return m === str;\n  }\n\n  _extractString(str) {\n    if (this._matches(str)) {\n      this.forwardN(str.length);\n      return str;\n    }\n    return null;\n  }\n\n  _extractUntil(charString) {\n    // Extract all non-matching chars, with the default matching set\n    // to everything\n    return this._extractMatching(true, charString || '');\n  }\n\n  _extract(charString) {\n    // Extract all matching chars (no default, so charString must be\n    // explicit)\n    return this._extractMatching(false, charString);\n  }\n\n  _extractMatching(breakOnMatch, charString) {\n    // Pull out characters until a breaking char is hit.\n    // If breakOnMatch is false, a non-matching char stops it.\n    // If breakOnMatch is true, a matching char stops it.\n\n    if (this.isFinished()) {\n      return null;\n    }\n\n    let first = charString.indexOf(this.current());\n\n    // Only proceed if the first character doesn't meet our condition\n    if ((breakOnMatch && first === -1) ||\n      (!breakOnMatch && first !== -1)) {\n      let t = this.current();\n      this.forward();\n\n      // And pull out all the chars one at a time until we hit a\n      // breaking char\n      let idx = charString.indexOf(this.current());\n\n      while (((breakOnMatch && idx === -1) ||\n        (!breakOnMatch && idx !== -1)) && !this.isFinished()) {\n        t += this.current();\n        this.forward();\n\n        idx = charString.indexOf(this.current());\n      }\n\n      return t;\n    }\n\n    return '';\n  }\n\n  _extractRegex(regex) {\n    let matches = this.currentStr().match(regex);\n    if (!matches) {\n      return null;\n    }\n\n    // Move forward whatever was matched\n    this.forwardN(matches[0].length);\n\n    return matches;\n  }\n\n  isFinished() {\n    return this.index >= this.len;\n  }\n\n  forwardN(n) {\n    for (let i = 0; i < n; i++) {\n      this.forward();\n    }\n  }\n\n  forward() {\n    this.index++;\n\n    if (this.previous() === '\\n') {\n      this.lineno++;\n      this.colno = 0;\n    } else {\n      this.colno++;\n    }\n  }\n\n  backN(n) {\n    for (let i = 0; i < n; i++) {\n      this.back();\n    }\n  }\n\n  back() {\n    this.index--;\n\n    if (this.current() === '\\n') {\n      this.lineno--;\n\n      let idx = this.src.lastIndexOf('\\n', this.index - 1);\n      if (idx === -1) {\n        this.colno = this.index;\n      } else {\n        this.colno = this.index - idx;\n      }\n    } else {\n      this.colno--;\n    }\n  }\n\n  // current returns current character\n  current() {\n    if (!this.isFinished()) {\n      return this.str.charAt(this.index);\n    }\n    return '';\n  }\n\n  // currentStr returns what's left of the unparsed string\n  currentStr() {\n    if (!this.isFinished()) {\n      return this.str.substr(this.index);\n    }\n    return '';\n  }\n\n  previous() {\n    return this.str.charAt(this.index - 1);\n  }\n}\n\nmodule.exports = {\n  lex(src, opts) {\n    return new Tokenizer(src, opts);\n  },\n\n  TOKEN_STRING: TOKEN_STRING,\n  TOKEN_WHITESPACE: TOKEN_WHITESPACE,\n  TOKEN_DATA: TOKEN_DATA,\n  TOKEN_BLOCK_START: TOKEN_BLOCK_START,\n  TOKEN_BLOCK_END: TOKEN_BLOCK_END,\n  TOKEN_VARIABLE_START: TOKEN_VARIABLE_START,\n  TOKEN_VARIABLE_END: TOKEN_VARIABLE_END,\n  TOKEN_COMMENT: TOKEN_COMMENT,\n  TOKEN_LEFT_PAREN: TOKEN_LEFT_PAREN,\n  TOKEN_RIGHT_PAREN: TOKEN_RIGHT_PAREN,\n  TOKEN_LEFT_BRACKET: TOKEN_LEFT_BRACKET,\n  TOKEN_RIGHT_BRACKET: TOKEN_RIGHT_BRACKET,\n  TOKEN_LEFT_CURLY: TOKEN_LEFT_CURLY,\n  TOKEN_RIGHT_CURLY: TOKEN_RIGHT_CURLY,\n  TOKEN_OPERATOR: TOKEN_OPERATOR,\n  TOKEN_COMMA: TOKEN_COMMA,\n  TOKEN_COLON: TOKEN_COLON,\n  TOKEN_TILDE: TOKEN_TILDE,\n  TOKEN_PIPE: TOKEN_PIPE,\n  TOKEN_INT: TOKEN_INT,\n  TOKEN_FLOAT: TOKEN_FLOAT,\n  TOKEN_BOOLEAN: TOKEN_BOOLEAN,\n  TOKEN_NONE: TOKEN_NONE,\n  TOKEN_SYMBOL: TOKEN_SYMBOL,\n  TOKEN_SPECIAL: TOKEN_SPECIAL,\n  TOKEN_REGEX: TOKEN_REGEX\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/lexer.js","'use strict';\n\nconst Loader = require('./loader');\nconst {PrecompiledLoader} = require('./precompiled-loader.js');\n\nclass WebLoader extends Loader {\n  constructor(baseURL, opts) {\n    super();\n    this.baseURL = baseURL || '.';\n    opts = opts || {};\n\n    // By default, the cache is turned off because there's no way\n    // to \"watch\" templates over HTTP, so they are re-downloaded\n    // and compiled each time. (Remember, PRECOMPILE YOUR\n    // TEMPLATES in production!)\n    this.useCache = !!opts.useCache;\n\n    // We default `async` to false so that the simple synchronous\n    // API can be used when you aren't doing anything async in\n    // your templates (which is most of the time). This performs a\n    // sync ajax request, but that's ok because it should *only*\n    // happen in development. PRECOMPILE YOUR TEMPLATES.\n    this.async = !!opts.async;\n  }\n\n  resolve(from, to) {\n    throw new Error('relative templates not support in the browser yet');\n  }\n\n  getSource(name, cb) {\n    var useCache = this.useCache;\n    var result;\n    this.fetch(this.baseURL + '/' + name, (err, src) => {\n      if (err) {\n        if (cb) {\n          cb(err.content);\n        } else if (err.status === 404) {\n          result = null;\n        } else {\n          throw err.content;\n        }\n      } else {\n        result = {\n          src: src,\n          path: name,\n          noCache: !useCache\n        };\n        this.emit('load', name, result);\n        if (cb) {\n          cb(null, result);\n        }\n      }\n    });\n\n    // if this WebLoader isn't running asynchronously, the\n    // fetch above would actually run sync and we'll have a\n    // result here\n    return result;\n  }\n\n  fetch(url, cb) {\n    // Only in the browser please\n    if (typeof window === 'undefined') {\n      throw new Error('WebLoader can only by used in a browser');\n    }\n\n    const ajax = new XMLHttpRequest();\n    let loading = true;\n\n    ajax.onreadystatechange = () => {\n      if (ajax.readyState === 4 && loading) {\n        loading = false;\n        if (ajax.status === 0 || ajax.status === 200) {\n          cb(null, ajax.responseText);\n        } else {\n          cb({\n            status: ajax.status,\n            content: ajax.responseText\n          });\n        }\n      }\n    };\n\n    url += (url.indexOf('?') === -1 ? '?' : '&') + 's=' +\n    (new Date().getTime());\n\n    ajax.open('GET', url, this.async);\n    ajax.send();\n  }\n}\n\nmodule.exports = {\n  WebLoader: WebLoader,\n  PrecompiledLoader: PrecompiledLoader\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/web-loaders.js","'use strict';\n\nconst lib = require('./src/lib');\nconst {Environment, Template} = require('./src/environment');\nconst Loader = require('./src/loader');\nconst loaders = require('./src/loaders');\nconst precompile = require('./src/precompile');\nconst compiler = require('./src/compiler');\nconst parser = require('./src/parser');\nconst lexer = require('./src/lexer');\nconst runtime = require('./src/runtime');\nconst nodes = require('./src/nodes');\nconst installJinjaCompat = require('./src/jinja-compat');\n\n// A single instance of an environment, since this is so commonly used\nlet e;\n\nfunction configure(templatesPath, opts) {\n  opts = opts || {};\n  if (lib.isObject(templatesPath)) {\n    opts = templatesPath;\n    templatesPath = null;\n  }\n\n  let TemplateLoader;\n  if (loaders.FileSystemLoader) {\n    TemplateLoader = new loaders.FileSystemLoader(templatesPath, {\n      watch: opts.watch,\n      noCache: opts.noCache\n    });\n  } else if (loaders.WebLoader) {\n    TemplateLoader = new loaders.WebLoader(templatesPath, {\n      useCache: opts.web && opts.web.useCache,\n      async: opts.web && opts.web.async\n    });\n  }\n\n  e = new Environment(TemplateLoader, opts);\n\n  if (opts && opts.express) {\n    e.express(opts.express);\n  }\n\n  return e;\n}\n\nmodule.exports = {\n  Environment: Environment,\n  Template: Template,\n  Loader: Loader,\n  FileSystemLoader: loaders.FileSystemLoader,\n  NodeResolveLoader: loaders.NodeResolveLoader,\n  PrecompiledLoader: loaders.PrecompiledLoader,\n  WebLoader: loaders.WebLoader,\n  compiler: compiler,\n  parser: parser,\n  lexer: lexer,\n  runtime: runtime,\n  lib: lib,\n  nodes: nodes,\n  installJinjaCompat: installJinjaCompat,\n  configure: configure,\n  reset() {\n    e = undefined;\n  },\n  compile(src, env, path, eagerCompile) {\n    if (!e) {\n      configure();\n    }\n    return new Template(src, env, path, eagerCompile);\n  },\n  render(name, ctx, cb) {\n    if (!e) {\n      configure();\n    }\n\n    return e.render(name, ctx, cb);\n  },\n  renderString(src, ctx, cb) {\n    if (!e) {\n      configure();\n    }\n\n    return e.renderString(src, ctx, cb);\n  },\n  precompile: (precompile) ? precompile.precompile : undefined,\n  precompileString: (precompile) ? precompile.precompileString : undefined,\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/index.js","\"use strict\";\n\n// rawAsap provides everything we need except exception management.\nvar rawAsap = require(\"./raw\");\n// RawTasks are recycled to reduce GC churn.\nvar freeTasks = [];\n// We queue errors to ensure they are thrown in right order (FIFO).\n// Array-as-queue is good enough here, since we are just dealing with exceptions.\nvar pendingErrors = [];\nvar requestErrorThrow = rawAsap.makeRequestCallFromTimer(throwFirstError);\n\nfunction throwFirstError() {\n    if (pendingErrors.length) {\n        throw pendingErrors.shift();\n    }\n}\n\n/**\n * Calls a task as soon as possible after returning, in its own event, with priority\n * over other events like animation, reflow, and repaint. An error thrown from an\n * event will not interrupt, nor even substantially slow down the processing of\n * other events, but will be rather postponed to a lower priority event.\n * @param {{call}} task A callable object, typically a function that takes no\n * arguments.\n */\nmodule.exports = asap;\nfunction asap(task) {\n    var rawTask;\n    if (freeTasks.length) {\n        rawTask = freeTasks.pop();\n    } else {\n        rawTask = new RawTask();\n    }\n    rawTask.task = task;\n    rawAsap(rawTask);\n}\n\n// We wrap tasks with recyclable task objects.  A task object implements\n// `call`, just like a function.\nfunction RawTask() {\n    this.task = null;\n}\n\n// The sole purpose of wrapping the task is to catch the exception and recycle\n// the task object after its single use.\nRawTask.prototype.call = function () {\n    try {\n        this.task.call();\n    } catch (error) {\n        if (asap.onerror) {\n            // This hook exists purely for testing purposes.\n            // Its name will be periodically randomized to break any code that\n            // depends on its existence.\n            asap.onerror(error);\n        } else {\n            // In a web browser, exceptions are not fatal. However, to avoid\n            // slowing down the queue of pending tasks, we rethrow the error in a\n            // lower priority turn.\n            pendingErrors.push(error);\n            requestErrorThrow();\n        }\n    } finally {\n        this.task = null;\n        freeTasks[freeTasks.length] = this;\n    }\n};\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ./node_modules/asap/browser-asap.js\n// module id = 12\n// module chunks = 0","\"use strict\";\n\n// Use the fastest means possible to execute a task in its own turn, with\n// priority over other events including IO, animation, reflow, and redraw\n// events in browsers.\n//\n// An exception thrown by a task will permanently interrupt the processing of\n// subsequent tasks. The higher level `asap` function ensures that if an\n// exception is thrown by a task, that the task queue will continue flushing as\n// soon as possible, but if you use `rawAsap` directly, you are responsible to\n// either ensure that no exceptions are thrown from your task, or to manually\n// call `rawAsap.requestFlush` if an exception is thrown.\nmodule.exports = rawAsap;\nfunction rawAsap(task) {\n    if (!queue.length) {\n        requestFlush();\n        flushing = true;\n    }\n    // Equivalent to push, but avoids a function call.\n    queue[queue.length] = task;\n}\n\nvar queue = [];\n// Once a flush has been requested, no further calls to `requestFlush` are\n// necessary until the next `flush` completes.\nvar flushing = false;\n// `requestFlush` is an implementation-specific method that attempts to kick\n// off a `flush` event as quickly as possible. `flush` will attempt to exhaust\n// the event queue before yielding to the browser's own event loop.\nvar requestFlush;\n// The position of the next task to execute in the task queue. This is\n// preserved between calls to `flush` so that it can be resumed if\n// a task throws an exception.\nvar index = 0;\n// If a task schedules additional tasks recursively, the task queue can grow\n// unbounded. To prevent memory exhaustion, the task queue will periodically\n// truncate already-completed tasks.\nvar capacity = 1024;\n\n// The flush function processes all tasks that have been scheduled with\n// `rawAsap` unless and until one of those tasks throws an exception.\n// If a task throws an exception, `flush` ensures that its state will remain\n// consistent and will resume where it left off when called again.\n// However, `flush` does not make any arrangements to be called again if an\n// exception is thrown.\nfunction flush() {\n    while (index < queue.length) {\n        var currentIndex = index;\n        // Advance the index before calling the task. This ensures that we will\n        // begin flushing on the next task the task throws an error.\n        index = index + 1;\n        queue[currentIndex].call();\n        // Prevent leaking memory for long chains of recursive calls to `asap`.\n        // If we call `asap` within tasks scheduled by `asap`, the queue will\n        // grow, but to avoid an O(n) walk for every task we execute, we don't\n        // shift tasks off the queue after they have been executed.\n        // Instead, we periodically shift 1024 tasks off the queue.\n        if (index > capacity) {\n            // Manually shift all values starting at the index back to the\n            // beginning of the queue.\n            for (var scan = 0, newLength = queue.length - index; scan < newLength; scan++) {\n                queue[scan] = queue[scan + index];\n            }\n            queue.length -= index;\n            index = 0;\n        }\n    }\n    queue.length = 0;\n    index = 0;\n    flushing = false;\n}\n\n// `requestFlush` is implemented using a strategy based on data collected from\n// every available SauceLabs Selenium web driver worker at time of writing.\n// https://docs.google.com/spreadsheets/d/1mG-5UYGup5qxGdEMWkhP6BWCz053NUb2E1QoUTU16uA/edit#gid=783724593\n\n// Safari 6 and 6.1 for desktop, iPad, and iPhone are the only browsers that\n// have WebKitMutationObserver but not un-prefixed MutationObserver.\n// Must use `global` or `self` instead of `window` to work in both frames and web\n// workers. `global` is a provision of Browserify, Mr, Mrs, or Mop.\n\n/* globals self */\nvar scope = typeof global !== \"undefined\" ? global : self;\nvar BrowserMutationObserver = scope.MutationObserver || scope.WebKitMutationObserver;\n\n// MutationObservers are desirable because they have high priority and work\n// reliably everywhere they are implemented.\n// They are implemented in all modern browsers.\n//\n// - Android 4-4.3\n// - Chrome 26-34\n// - Firefox 14-29\n// - Internet Explorer 11\n// - iPad Safari 6-7.1\n// - iPhone Safari 7-7.1\n// - Safari 6-7\nif (typeof BrowserMutationObserver === \"function\") {\n    requestFlush = makeRequestCallFromMutationObserver(flush);\n\n// MessageChannels are desirable because they give direct access to the HTML\n// task queue, are implemented in Internet Explorer 10, Safari 5.0-1, and Opera\n// 11-12, and in web workers in many engines.\n// Although message channels yield to any queued rendering and IO tasks, they\n// would be better than imposing the 4ms delay of timers.\n// However, they do not work reliably in Internet Explorer or Safari.\n\n// Internet Explorer 10 is the only browser that has setImmediate but does\n// not have MutationObservers.\n// Although setImmediate yields to the browser's renderer, it would be\n// preferrable to falling back to setTimeout since it does not have\n// the minimum 4ms penalty.\n// Unfortunately there appears to be a bug in Internet Explorer 10 Mobile (and\n// Desktop to a lesser extent) that renders both setImmediate and\n// MessageChannel useless for the purposes of ASAP.\n// https://github.com/kriskowal/q/issues/396\n\n// Timers are implemented universally.\n// We fall back to timers in workers in most engines, and in foreground\n// contexts in the following browsers.\n// However, note that even this simple case requires nuances to operate in a\n// broad spectrum of browsers.\n//\n// - Firefox 3-13\n// - Internet Explorer 6-9\n// - iPad Safari 4.3\n// - Lynx 2.8.7\n} else {\n    requestFlush = makeRequestCallFromTimer(flush);\n}\n\n// `requestFlush` requests that the high priority event queue be flushed as\n// soon as possible.\n// This is useful to prevent an error thrown in a task from stalling the event\n// queue if the exception handled by Node.js’s\n// `process.on(\"uncaughtException\")` or by a domain.\nrawAsap.requestFlush = requestFlush;\n\n// To request a high priority event, we induce a mutation observer by toggling\n// the text of a text node between \"1\" and \"-1\".\nfunction makeRequestCallFromMutationObserver(callback) {\n    var toggle = 1;\n    var observer = new BrowserMutationObserver(callback);\n    var node = document.createTextNode(\"\");\n    observer.observe(node, {characterData: true});\n    return function requestCall() {\n        toggle = -toggle;\n        node.data = toggle;\n    };\n}\n\n// The message channel technique was discovered by Malte Ubl and was the\n// original foundation for this library.\n// http://www.nonblocking.io/2011/06/windownexttick.html\n\n// Safari 6.0.5 (at least) intermittently fails to create message ports on a\n// page's first load. Thankfully, this version of Safari supports\n// MutationObservers, so we don't need to fall back in that case.\n\n// function makeRequestCallFromMessageChannel(callback) {\n//     var channel = new MessageChannel();\n//     channel.port1.onmessage = callback;\n//     return function requestCall() {\n//         channel.port2.postMessage(0);\n//     };\n// }\n\n// For reasons explained above, we are also unable to use `setImmediate`\n// under any circumstances.\n// Even if we were, there is another bug in Internet Explorer 10.\n// It is not sufficient to assign `setImmediate` to `requestFlush` because\n// `setImmediate` must be called *by name* and therefore must be wrapped in a\n// closure.\n// Never forget.\n\n// function makeRequestCallFromSetImmediate(callback) {\n//     return function requestCall() {\n//         setImmediate(callback);\n//     };\n// }\n\n// Safari 6.0 has a problem where timers will get lost while the user is\n// scrolling. This problem does not impact ASAP because Safari 6.0 supports\n// mutation observers, so that implementation is used instead.\n// However, if we ever elect to use timers in Safari, the prevalent work-around\n// is to add a scroll event listener that calls for a flush.\n\n// `setTimeout` does not call the passed callback if the delay is less than\n// approximately 7 in web workers in Firefox 8 through 18, and sometimes not\n// even then.\n\nfunction makeRequestCallFromTimer(callback) {\n    return function requestCall() {\n        // We dispatch a timeout with a specified delay of 0 for engines that\n        // can reliably accommodate that request. This will usually be snapped\n        // to a 4 milisecond delay, but once we're flushing, there's no delay\n        // between events.\n        var timeoutHandle = setTimeout(handleTimer, 0);\n        // However, since this timer gets frequently dropped in Firefox\n        // workers, we enlist an interval handle that will try to fire\n        // an event 20 times per second until it succeeds.\n        var intervalHandle = setInterval(handleTimer, 50);\n\n        function handleTimer() {\n            // Whichever timer succeeds will cancel both timers and\n            // execute the callback.\n            clearTimeout(timeoutHandle);\n            clearInterval(intervalHandle);\n            callback();\n        }\n    };\n}\n\n// This is for `asap.js` only.\n// Its name will be periodically randomized to break any code that depends on\n// its existence.\nrawAsap.makeRequestCallFromTimer = makeRequestCallFromTimer;\n\n// ASAP was originally a nextTick shim included in Q. This was factored out\n// into this ASAP package. It was later adapted to RSVP which made further\n// amendments. These decisions, particularly to marginalize MessageChannel and\n// to capture the MutationObserver implementation in a closure, were integrated\n// back into ASAP proper.\n// https://github.com/tildeio/rsvp.js/blob/cddf7232546a9cf858524b75cde6f9edf72620a7/lib/rsvp/asap.js\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ./node_modules/asap/browser-raw.js\n// module id = 13\n// module chunks = 0","var g;\r\n\r\n// This works in non-strict mode\r\ng = (function() {\r\n\treturn this;\r\n})();\r\n\r\ntry {\r\n\t// This works if eval is allowed (see CSP)\r\n\tg = g || Function(\"return this\")() || (1,eval)(\"this\");\r\n} catch(e) {\r\n\t// This works if the window reference is available\r\n\tif(typeof window === \"object\")\r\n\t\tg = window;\r\n}\r\n\r\n// g can still be undefined, but nothing to do about it...\r\n// We return undefined, instead of nothing here, so it's\r\n// easier to handle this case. if(!global) { ...}\r\n\r\nmodule.exports = g;\r\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// (webpack)/buildin/global.js\n// module id = 14\n// module chunks = 0","// MIT license (by Elan Shanker).\n(function(globals) {\n  'use strict';\n\n  var executeSync = function(){\n    var args = Array.prototype.slice.call(arguments);\n    if (typeof args[0] === 'function'){\n      args[0].apply(null, args.splice(1));\n    }\n  };\n\n  var executeAsync = function(fn){\n    if (typeof setImmediate === 'function') {\n      setImmediate(fn);\n    } else if (typeof process !== 'undefined' && process.nextTick) {\n      process.nextTick(fn);\n    } else {\n      setTimeout(fn, 0);\n    }\n  };\n\n  var makeIterator = function (tasks) {\n    var makeCallback = function (index) {\n      var fn = function () {\n        if (tasks.length) {\n          tasks[index].apply(null, arguments);\n        }\n        return fn.next();\n      };\n      fn.next = function () {\n        return (index < tasks.length - 1) ? makeCallback(index + 1): null;\n      };\n      return fn;\n    };\n    return makeCallback(0);\n  };\n  \n  var _isArray = Array.isArray || function(maybeArray){\n    return Object.prototype.toString.call(maybeArray) === '[object Array]';\n  };\n\n  var waterfall = function (tasks, callback, forceAsync) {\n    var nextTick = forceAsync ? executeAsync : executeSync;\n    callback = callback || function () {};\n    if (!_isArray(tasks)) {\n      var err = new Error('First argument to waterfall must be an array of functions');\n      return callback(err);\n    }\n    if (!tasks.length) {\n      return callback();\n    }\n    var wrapIterator = function (iterator) {\n      return function (err) {\n        if (err) {\n          callback.apply(null, arguments);\n          callback = function () {};\n        } else {\n          var args = Array.prototype.slice.call(arguments, 1);\n          var next = iterator.next();\n          if (next) {\n            args.push(wrapIterator(next));\n          } else {\n            args.push(callback);\n          }\n          nextTick(function () {\n            iterator.apply(null, args);\n          });\n        }\n      };\n    };\n    wrapIterator(makeIterator(tasks))();\n  };\n\n  if (typeof define !== 'undefined' && define.amd) {\n    define([], function () {\n      return waterfall;\n    }); // RequireJS\n  } else if (typeof module !== 'undefined' && module.exports) {\n    module.exports = waterfall; // CommonJS\n  } else {\n    globals.waterfall = waterfall; // <script>\n  }\n})(this);\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ./node_modules/a-sync-waterfall/index.js\n// module id = 15\n// module chunks = 0","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\nfunction EventEmitter() {\n  this._events = this._events || {};\n  this._maxListeners = this._maxListeners || undefined;\n}\nmodule.exports = EventEmitter;\n\n// Backwards-compat with node 0.10.x\nEventEmitter.EventEmitter = EventEmitter;\n\nEventEmitter.prototype._events = undefined;\nEventEmitter.prototype._maxListeners = undefined;\n\n// By default EventEmitters will print a warning if more than 10 listeners are\n// added to it. This is a useful default which helps finding memory leaks.\nEventEmitter.defaultMaxListeners = 10;\n\n// Obviously not all Emitters should be limited to 10. This function allows\n// that to be increased. Set to zero for unlimited.\nEventEmitter.prototype.setMaxListeners = function(n) {\n  if (!isNumber(n) || n < 0 || isNaN(n))\n    throw TypeError('n must be a positive number');\n  this._maxListeners = n;\n  return this;\n};\n\nEventEmitter.prototype.emit = function(type) {\n  var er, handler, len, args, i, listeners;\n\n  if (!this._events)\n    this._events = {};\n\n  // If there is no 'error' event listener then throw.\n  if (type === 'error') {\n    if (!this._events.error ||\n        (isObject(this._events.error) && !this._events.error.length)) {\n      er = arguments[1];\n      if (er instanceof Error) {\n        throw er; // Unhandled 'error' event\n      } else {\n        // At least give some kind of context to the user\n        var err = new Error('Uncaught, unspecified \"error\" event. (' + er + ')');\n        err.context = er;\n        throw err;\n      }\n    }\n  }\n\n  handler = this._events[type];\n\n  if (isUndefined(handler))\n    return false;\n\n  if (isFunction(handler)) {\n    switch (arguments.length) {\n      // fast cases\n      case 1:\n        handler.call(this);\n        break;\n      case 2:\n        handler.call(this, arguments[1]);\n        break;\n      case 3:\n        handler.call(this, arguments[1], arguments[2]);\n        break;\n      // slower\n      default:\n        args = Array.prototype.slice.call(arguments, 1);\n        handler.apply(this, args);\n    }\n  } else if (isObject(handler)) {\n    args = Array.prototype.slice.call(arguments, 1);\n    listeners = handler.slice();\n    len = listeners.length;\n    for (i = 0; i < len; i++)\n      listeners[i].apply(this, args);\n  }\n\n  return true;\n};\n\nEventEmitter.prototype.addListener = function(type, listener) {\n  var m;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events)\n    this._events = {};\n\n  // To avoid recursion in the case that type === \"newListener\"! Before\n  // adding it to the listeners, first emit \"newListener\".\n  if (this._events.newListener)\n    this.emit('newListener', type,\n              isFunction(listener.listener) ?\n              listener.listener : listener);\n\n  if (!this._events[type])\n    // Optimize the case of one listener. Don't need the extra array object.\n    this._events[type] = listener;\n  else if (isObject(this._events[type]))\n    // If we've already got an array, just append.\n    this._events[type].push(listener);\n  else\n    // Adding the second element, need to change to array.\n    this._events[type] = [this._events[type], listener];\n\n  // Check for listener leak\n  if (isObject(this._events[type]) && !this._events[type].warned) {\n    if (!isUndefined(this._maxListeners)) {\n      m = this._maxListeners;\n    } else {\n      m = EventEmitter.defaultMaxListeners;\n    }\n\n    if (m && m > 0 && this._events[type].length > m) {\n      this._events[type].warned = true;\n      console.error('(node) warning: possible EventEmitter memory ' +\n                    'leak detected. %d listeners added. ' +\n                    'Use emitter.setMaxListeners() to increase limit.',\n                    this._events[type].length);\n      if (typeof console.trace === 'function') {\n        // not supported in IE 10\n        console.trace();\n      }\n    }\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.on = EventEmitter.prototype.addListener;\n\nEventEmitter.prototype.once = function(type, listener) {\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  var fired = false;\n\n  function g() {\n    this.removeListener(type, g);\n\n    if (!fired) {\n      fired = true;\n      listener.apply(this, arguments);\n    }\n  }\n\n  g.listener = listener;\n  this.on(type, g);\n\n  return this;\n};\n\n// emits a 'removeListener' event iff the listener was removed\nEventEmitter.prototype.removeListener = function(type, listener) {\n  var list, position, length, i;\n\n  if (!isFunction(listener))\n    throw TypeError('listener must be a function');\n\n  if (!this._events || !this._events[type])\n    return this;\n\n  list = this._events[type];\n  length = list.length;\n  position = -1;\n\n  if (list === listener ||\n      (isFunction(list.listener) && list.listener === listener)) {\n    delete this._events[type];\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n\n  } else if (isObject(list)) {\n    for (i = length; i-- > 0;) {\n      if (list[i] === listener ||\n          (list[i].listener && list[i].listener === listener)) {\n        position = i;\n        break;\n      }\n    }\n\n    if (position < 0)\n      return this;\n\n    if (list.length === 1) {\n      list.length = 0;\n      delete this._events[type];\n    } else {\n      list.splice(position, 1);\n    }\n\n    if (this._events.removeListener)\n      this.emit('removeListener', type, listener);\n  }\n\n  return this;\n};\n\nEventEmitter.prototype.removeAllListeners = function(type) {\n  var key, listeners;\n\n  if (!this._events)\n    return this;\n\n  // not listening for removeListener, no need to emit\n  if (!this._events.removeListener) {\n    if (arguments.length === 0)\n      this._events = {};\n    else if (this._events[type])\n      delete this._events[type];\n    return this;\n  }\n\n  // emit removeListener for all listeners on all events\n  if (arguments.length === 0) {\n    for (key in this._events) {\n      if (key === 'removeListener') continue;\n      this.removeAllListeners(key);\n    }\n    this.removeAllListeners('removeListener');\n    this._events = {};\n    return this;\n  }\n\n  listeners = this._events[type];\n\n  if (isFunction(listeners)) {\n    this.removeListener(type, listeners);\n  } else if (listeners) {\n    // LIFO order\n    while (listeners.length)\n      this.removeListener(type, listeners[listeners.length - 1]);\n  }\n  delete this._events[type];\n\n  return this;\n};\n\nEventEmitter.prototype.listeners = function(type) {\n  var ret;\n  if (!this._events || !this._events[type])\n    ret = [];\n  else if (isFunction(this._events[type]))\n    ret = [this._events[type]];\n  else\n    ret = this._events[type].slice();\n  return ret;\n};\n\nEventEmitter.prototype.listenerCount = function(type) {\n  if (this._events) {\n    var evlistener = this._events[type];\n\n    if (isFunction(evlistener))\n      return 1;\n    else if (evlistener)\n      return evlistener.length;\n  }\n  return 0;\n};\n\nEventEmitter.listenerCount = function(emitter, type) {\n  return emitter.listenerCount(type);\n};\n\nfunction isFunction(arg) {\n  return typeof arg === 'function';\n}\n\nfunction isNumber(arg) {\n  return typeof arg === 'number';\n}\n\nfunction isObject(arg) {\n  return typeof arg === 'object' && arg !== null;\n}\n\nfunction isUndefined(arg) {\n  return arg === void 0;\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ./node_modules/events/events.js\n// module id = 16\n// module chunks = 0","'use strict';\n\nvar nodes = require('./nodes');\nvar lib = require('./lib');\n\nvar sym = 0;\nfunction gensym() {\n  return 'hole_' + sym++;\n}\n\n// copy-on-write version of map\nfunction mapCOW(arr, func) {\n  var res = null;\n  for (let i = 0; i < arr.length; i++) {\n    const item = func(arr[i]);\n\n    if (item !== arr[i]) {\n      if (!res) {\n        res = arr.slice();\n      }\n\n      res[i] = item;\n    }\n  }\n\n  return res || arr;\n}\n\nfunction walk(ast, func, depthFirst) {\n  if (!(ast instanceof nodes.Node)) {\n    return ast;\n  }\n\n  if (!depthFirst) {\n    const astT = func(ast);\n\n    if (astT && astT !== ast) {\n      return astT;\n    }\n  }\n\n  if (ast instanceof nodes.NodeList) {\n    const children = mapCOW(ast.children, (node) => walk(node, func, depthFirst));\n\n    if (children !== ast.children) {\n      ast = new nodes[ast.typename](ast.lineno, ast.colno, children);\n    }\n  } else if (ast instanceof nodes.CallExtension) {\n    const args = walk(ast.args, func, depthFirst);\n    const contentArgs = mapCOW(ast.contentArgs, (node) => walk(node, func, depthFirst));\n\n    if (args !== ast.args || contentArgs !== ast.contentArgs) {\n      ast = new nodes[ast.typename](ast.extName, ast.prop, args, contentArgs);\n    }\n  } else {\n    const props = ast.fields.map((field) => ast[field]);\n    const propsT = mapCOW(props, (prop) => walk(prop, func, depthFirst));\n\n    if (propsT !== props) {\n      ast = new nodes[ast.typename](ast.lineno, ast.colno);\n      propsT.forEach((prop, i) => {\n        ast[ast.fields[i]] = prop;\n      });\n    }\n  }\n\n  return depthFirst ? (func(ast) || ast) : ast;\n}\n\nfunction depthWalk(ast, func) {\n  return walk(ast, func, true);\n}\n\nfunction _liftFilters(node, asyncFilters, prop) {\n  var children = [];\n\n  var walked = depthWalk(prop ? node[prop] : node, (descNode) => {\n    let symbol;\n    if (descNode instanceof nodes.Block) {\n      return descNode;\n    } else if ((descNode instanceof nodes.Filter &&\n      lib.indexOf(asyncFilters, descNode.name.value) !== -1) ||\n      descNode instanceof nodes.CallExtensionAsync) {\n      symbol = new nodes.Symbol(descNode.lineno,\n        descNode.colno,\n        gensym());\n\n      children.push(new nodes.FilterAsync(descNode.lineno,\n        descNode.colno,\n        descNode.name,\n        descNode.args,\n        symbol));\n    }\n    return symbol;\n  });\n\n  if (prop) {\n    node[prop] = walked;\n  } else {\n    node = walked;\n  }\n\n  if (children.length) {\n    children.push(node);\n\n    return new nodes.NodeList(\n      node.lineno,\n      node.colno,\n      children\n    );\n  } else {\n    return node;\n  }\n}\n\nfunction liftFilters(ast, asyncFilters) {\n  return depthWalk(ast, (node) => {\n    if (node instanceof nodes.Output) {\n      return _liftFilters(node, asyncFilters);\n    } else if (node instanceof nodes.Set) {\n      return _liftFilters(node, asyncFilters, 'value');\n    } else if (node instanceof nodes.For) {\n      return _liftFilters(node, asyncFilters, 'arr');\n    } else if (node instanceof nodes.If) {\n      return _liftFilters(node, asyncFilters, 'cond');\n    } else if (node instanceof nodes.CallExtension) {\n      return _liftFilters(node, asyncFilters, 'args');\n    } else {\n      return undefined;\n    }\n  });\n}\n\nfunction liftSuper(ast) {\n  return walk(ast, (blockNode) => {\n    if (!(blockNode instanceof nodes.Block)) {\n      return;\n    }\n\n    let hasSuper = false;\n    const symbol = gensym();\n\n    blockNode.body = walk(blockNode.body, (node) => { // eslint-disable-line consistent-return\n      if (node instanceof nodes.FunCall && node.name.value === 'super') {\n        hasSuper = true;\n        return new nodes.Symbol(node.lineno, node.colno, symbol);\n      }\n    });\n\n    if (hasSuper) {\n      blockNode.body.children.unshift(new nodes.Super(\n        0, 0, blockNode.name, new nodes.Symbol(0, 0, symbol)\n      ));\n    }\n  });\n}\n\nfunction convertStatements(ast) {\n  return depthWalk(ast, (node) => {\n    if (!(node instanceof nodes.If) && !(node instanceof nodes.For)) {\n      return undefined;\n    }\n\n    let async = false;\n    walk(node, (child) => {\n      if (child instanceof nodes.FilterAsync ||\n        child instanceof nodes.IfAsync ||\n        child instanceof nodes.AsyncEach ||\n        child instanceof nodes.AsyncAll ||\n        child instanceof nodes.CallExtensionAsync) {\n        async = true;\n        // Stop iterating by returning the node\n        return child;\n      }\n      return undefined;\n    });\n\n    if (async) {\n      if (node instanceof nodes.If) {\n        return new nodes.IfAsync(\n          node.lineno,\n          node.colno,\n          node.cond,\n          node.body,\n          node.else_\n        );\n      } else if (node instanceof nodes.For && !(node instanceof nodes.AsyncAll)) {\n        return new nodes.AsyncEach(\n          node.lineno,\n          node.colno,\n          node.arr,\n          node.name,\n          node.body,\n          node.else_\n        );\n      }\n    }\n    return undefined;\n  });\n}\n\nfunction cps(ast, asyncFilters) {\n  return convertStatements(liftSuper(liftFilters(ast, asyncFilters)));\n}\n\nfunction transform(ast, asyncFilters) {\n  return cps(ast, asyncFilters || []);\n}\n\n// var parser = require('./parser');\n// var src = 'hello {% foo %}{% endfoo %} end';\n// var ast = transform(parser.parse(src, [new FooExtension()]), ['bar']);\n// nodes.printNodes(ast);\n\nmodule.exports = {\n  transform: transform\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/transformer.js","'use strict';\n\nvar lib = require('./lib');\nvar r = require('./runtime');\n\nvar exports = module.exports = {};\n\nfunction normalize(value, defaultValue) {\n  if (value === null || value === undefined || value === false) {\n    return defaultValue;\n  }\n  return value;\n}\n\nexports.abs = Math.abs;\n\nfunction isNaN(num) {\n  return num !== num; // eslint-disable-line no-self-compare\n}\n\nfunction batch(arr, linecount, fillWith) {\n  var i;\n  var res = [];\n  var tmp = [];\n\n  for (i = 0; i < arr.length; i++) {\n    if (i % linecount === 0 && tmp.length) {\n      res.push(tmp);\n      tmp = [];\n    }\n\n    tmp.push(arr[i]);\n  }\n\n  if (tmp.length) {\n    if (fillWith) {\n      for (i = tmp.length; i < linecount; i++) {\n        tmp.push(fillWith);\n      }\n    }\n\n    res.push(tmp);\n  }\n\n  return res;\n}\n\nexports.batch = batch;\n\nfunction capitalize(str) {\n  str = normalize(str, '');\n  const ret = str.toLowerCase();\n  return r.copySafeness(str, ret.charAt(0).toUpperCase() + ret.slice(1));\n}\n\nexports.capitalize = capitalize;\n\nfunction center(str, width) {\n  str = normalize(str, '');\n  width = width || 80;\n\n  if (str.length >= width) {\n    return str;\n  }\n\n  const spaces = width - str.length;\n  const pre = lib.repeat(' ', (spaces / 2) - (spaces % 2));\n  const post = lib.repeat(' ', spaces / 2);\n  return r.copySafeness(str, pre + str + post);\n}\n\nexports.center = center;\n\nfunction default_(val, def, bool) {\n  if (bool) {\n    return val || def;\n  } else {\n    return (val !== undefined) ? val : def;\n  }\n}\n\n// TODO: it is confusing to export something called 'default'\nexports['default'] = default_; // eslint-disable-line dot-notation\n\nfunction dictsort(val, caseSensitive, by) {\n  if (!lib.isObject(val)) {\n    throw new lib.TemplateError('dictsort filter: val must be an object');\n  }\n\n  let array = [];\n  // deliberately include properties from the object's prototype\n  for (let k in val) { // eslint-disable-line guard-for-in, no-restricted-syntax\n    array.push([k, val[k]]);\n  }\n\n  let si;\n  if (by === undefined || by === 'key') {\n    si = 0;\n  } else if (by === 'value') {\n    si = 1;\n  } else {\n    throw new lib.TemplateError(\n      'dictsort filter: You can only sort by either key or value');\n  }\n\n  array.sort((t1, t2) => {\n    var a = t1[si];\n    var b = t2[si];\n\n    if (!caseSensitive) {\n      if (lib.isString(a)) {\n        a = a.toUpperCase();\n      }\n      if (lib.isString(b)) {\n        b = b.toUpperCase();\n      }\n    }\n\n    return a > b ? 1 : (a === b ? 0 : -1); // eslint-disable-line no-nested-ternary\n  });\n\n  return array;\n}\n\nexports.dictsort = dictsort;\n\nfunction dump(obj, spaces) {\n  return JSON.stringify(obj, null, spaces);\n}\n\nexports.dump = dump;\n\nfunction escape(str) {\n  if (str instanceof r.SafeString) {\n    return str;\n  }\n  str = (str === null || str === undefined) ? '' : str;\n  return r.markSafe(lib.escape(str.toString()));\n}\n\nexports.escape = escape;\n\nfunction safe(str) {\n  if (str instanceof r.SafeString) {\n    return str;\n  }\n  str = (str === null || str === undefined) ? '' : str;\n  return r.markSafe(str.toString());\n}\n\nexports.safe = safe;\n\nfunction first(arr) {\n  return arr[0];\n}\n\nexports.first = first;\n\nfunction forceescape(str) {\n  str = (str === null || str === undefined) ? '' : str;\n  return r.markSafe(lib.escape(str.toString()));\n}\n\nexports.forceescape = forceescape;\n\nfunction groupby(arr, attr) {\n  return lib.groupBy(arr, attr, this.env.opts.throwOnUndefined);\n}\n\nexports.groupby = groupby;\n\nfunction indent(str, width, indentfirst) {\n  str = normalize(str, '');\n\n  if (str === '') {\n    return '';\n  }\n\n  width = width || 4;\n  // let res = '';\n  const lines = str.split('\\n');\n  const sp = lib.repeat(' ', width);\n\n  const res = lines.map((l, i) => {\n    return (i === 0 && !indentfirst) ? l : `${sp}${l}`;\n  }).join('\\n');\n\n  return r.copySafeness(str, res);\n}\n\nexports.indent = indent;\n\nfunction join(arr, del, attr) {\n  del = del || '';\n\n  if (attr) {\n    arr = lib.map(arr, (v) => v[attr]);\n  }\n\n  return arr.join(del);\n}\n\nexports.join = join;\n\nfunction last(arr) {\n  return arr[arr.length - 1];\n}\n\nexports.last = last;\n\nfunction lengthFilter(val) {\n  var value = normalize(val, '');\n\n  if (value !== undefined) {\n    if (\n      (typeof Map === 'function' && value instanceof Map) ||\n      (typeof Set === 'function' && value instanceof Set)\n    ) {\n      // ECMAScript 2015 Maps and Sets\n      return value.size;\n    }\n    if (lib.isObject(value) && !(value instanceof r.SafeString)) {\n      // Objects (besides SafeStrings), non-primative Arrays\n      return lib.keys(value).length;\n    }\n    return value.length;\n  }\n  return 0;\n}\n\nexports.length = lengthFilter;\n\nfunction list(val) {\n  if (lib.isString(val)) {\n    return val.split('');\n  } else if (lib.isObject(val)) {\n    return lib._entries(val || {}).map(([key, value]) => ({key, value}));\n  } else if (lib.isArray(val)) {\n    return val;\n  } else {\n    throw new lib.TemplateError('list filter: type not iterable');\n  }\n}\n\nexports.list = list;\n\nfunction lower(str) {\n  str = normalize(str, '');\n  return str.toLowerCase();\n}\n\nexports.lower = lower;\n\nfunction nl2br(str) {\n  if (str === null || str === undefined) {\n    return '';\n  }\n  return r.copySafeness(str, str.replace(/\\r\\n|\\n/g, '<br />\\n'));\n}\n\nexports.nl2br = nl2br;\n\nfunction random(arr) {\n  return arr[Math.floor(Math.random() * arr.length)];\n}\n\nexports.random = random;\n\n/**\n * Construct select or reject filter\n *\n * @param {boolean} expectedTestResult\n * @returns {function(array, string, *): array}\n */\nfunction getSelectOrReject(expectedTestResult) {\n  function filter(arr, testName = 'truthy', secondArg) {\n    const context = this;\n    const test = context.env.getTest(testName);\n\n    return lib.toArray(arr).filter(function examineTestResult(item) {\n      return test.call(context, item, secondArg) === expectedTestResult;\n    });\n  }\n\n  return filter;\n}\n\nexports.reject = getSelectOrReject(false);\n\nfunction rejectattr(arr, attr) {\n  return arr.filter((item) => !item[attr]);\n}\n\nexports.rejectattr = rejectattr;\n\nexports.select = getSelectOrReject(true);\n\nfunction selectattr(arr, attr) {\n  return arr.filter((item) => !!item[attr]);\n}\n\nexports.selectattr = selectattr;\n\nfunction replace(str, old, new_, maxCount) {\n  var originalStr = str;\n\n  if (old instanceof RegExp) {\n    return str.replace(old, new_);\n  }\n\n  if (typeof maxCount === 'undefined') {\n    maxCount = -1;\n  }\n\n  let res = ''; // Output\n\n  // Cast Numbers in the search term to string\n  if (typeof old === 'number') {\n    old = '' + old;\n  } else if (typeof old !== 'string') {\n    // If it is something other than number or string,\n    // return the original string\n    return str;\n  }\n\n  // Cast numbers in the replacement to string\n  if (typeof str === 'number') {\n    str = '' + str;\n  }\n\n  // If by now, we don't have a string, throw it back\n  if (typeof str !== 'string' && !(str instanceof r.SafeString)) {\n    return str;\n  }\n\n  // ShortCircuits\n  if (old === '') {\n    // Mimic the python behaviour: empty string is replaced\n    // by replacement e.g. \"abc\"|replace(\"\", \".\") -> .a.b.c.\n    res = new_ + str.split('').join(new_) + new_;\n    return r.copySafeness(str, res);\n  }\n\n  let nextIndex = str.indexOf(old);\n  // if # of replacements to perform is 0, or the string to does\n  // not contain the old value, return the string\n  if (maxCount === 0 || nextIndex === -1) {\n    return str;\n  }\n\n  let pos = 0;\n  let count = 0; // # of replacements made\n\n  while (nextIndex > -1 && (maxCount === -1 || count < maxCount)) {\n    // Grab the next chunk of src string and add it with the\n    // replacement, to the result\n    res += str.substring(pos, nextIndex) + new_;\n    // Increment our pointer in the src string\n    pos = nextIndex + old.length;\n    count++;\n    // See if there are any more replacements to be made\n    nextIndex = str.indexOf(old, pos);\n  }\n\n  // We've either reached the end, or done the max # of\n  // replacements, tack on any remaining string\n  if (pos < str.length) {\n    res += str.substring(pos);\n  }\n\n  return r.copySafeness(originalStr, res);\n}\n\nexports.replace = replace;\n\nfunction reverse(val) {\n  var arr;\n  if (lib.isString(val)) {\n    arr = list(val);\n  } else {\n    // Copy it\n    arr = lib.map(val, v => v);\n  }\n\n  arr.reverse();\n\n  if (lib.isString(val)) {\n    return r.copySafeness(val, arr.join(''));\n  }\n  return arr;\n}\n\nexports.reverse = reverse;\n\nfunction round(val, precision, method) {\n  precision = precision || 0;\n  const factor = Math.pow(10, precision);\n  let rounder;\n\n  if (method === 'ceil') {\n    rounder = Math.ceil;\n  } else if (method === 'floor') {\n    rounder = Math.floor;\n  } else {\n    rounder = Math.round;\n  }\n\n  return rounder(val * factor) / factor;\n}\n\nexports.round = round;\n\nfunction slice(arr, slices, fillWith) {\n  const sliceLength = Math.floor(arr.length / slices);\n  const extra = arr.length % slices;\n  const res = [];\n  let offset = 0;\n\n  for (let i = 0; i < slices; i++) {\n    const start = offset + (i * sliceLength);\n    if (i < extra) {\n      offset++;\n    }\n    const end = offset + ((i + 1) * sliceLength);\n\n    const currSlice = arr.slice(start, end);\n    if (fillWith && i >= extra) {\n      currSlice.push(fillWith);\n    }\n    res.push(currSlice);\n  }\n\n  return res;\n}\n\nexports.slice = slice;\n\nfunction sum(arr, attr, start = 0) {\n  if (attr) {\n    arr = lib.map(arr, (v) => v[attr]);\n  }\n\n  return start + arr.reduce((a, b) => a + b, 0);\n}\n\nexports.sum = sum;\n\nexports.sort = r.makeMacro(\n  ['value', 'reverse', 'case_sensitive', 'attribute'], [],\n  (arr, reversed, caseSens, attr) => {\n    // Copy it\n    let array = lib.map(arr, v => v);\n\n    array.sort((a, b) => {\n      let x = (attr) ? a[attr] : a;\n      let y = (attr) ? b[attr] : b;\n\n      if (!caseSens && lib.isString(x) && lib.isString(y)) {\n        x = x.toLowerCase();\n        y = y.toLowerCase();\n      }\n\n      if (x < y) {\n        return reversed ? 1 : -1;\n      } else if (x > y) {\n        return reversed ? -1 : 1;\n      } else {\n        return 0;\n      }\n    });\n\n    return array;\n  });\n\nfunction string(obj) {\n  return r.copySafeness(obj, obj);\n}\n\nexports.string = string;\n\nfunction striptags(input, preserveLinebreaks) {\n  input = normalize(input, '');\n  let tags = /<\\/?([a-z][a-z0-9]*)\\b[^>]*>|<!--[\\s\\S]*?-->/gi;\n  let trimmedInput = trim(input.replace(tags, ''));\n  let res = '';\n  if (preserveLinebreaks) {\n    res = trimmedInput\n      .replace(/^ +| +$/gm, '') // remove leading and trailing spaces\n      .replace(/ +/g, ' ') // squash adjacent spaces\n      .replace(/(\\r\\n)/g, '\\n') // normalize linebreaks (CRLF -> LF)\n      .replace(/\\n\\n\\n+/g, '\\n\\n'); // squash abnormal adjacent linebreaks\n  } else {\n    res = trimmedInput.replace(/\\s+/gi, ' ');\n  }\n  return r.copySafeness(input, res);\n}\n\nexports.striptags = striptags;\n\nfunction title(str) {\n  str = normalize(str, '');\n  let words = str.split(' ').map(word => capitalize(word));\n  return r.copySafeness(str, words.join(' '));\n}\n\nexports.title = title;\n\nfunction trim(str) {\n  return r.copySafeness(str, str.replace(/^\\s*|\\s*$/g, ''));\n}\n\nexports.trim = trim;\n\nfunction truncate(input, length, killwords, end) {\n  var orig = input;\n  input = normalize(input, '');\n  length = length || 255;\n\n  if (input.length <= length) {\n    return input;\n  }\n\n  if (killwords) {\n    input = input.substring(0, length);\n  } else {\n    let idx = input.lastIndexOf(' ', length);\n    if (idx === -1) {\n      idx = length;\n    }\n\n    input = input.substring(0, idx);\n  }\n\n  input += (end !== undefined && end !== null) ? end : '...';\n  return r.copySafeness(orig, input);\n}\n\nexports.truncate = truncate;\n\nfunction upper(str) {\n  str = normalize(str, '');\n  return str.toUpperCase();\n}\n\nexports.upper = upper;\n\nfunction urlencode(obj) {\n  var enc = encodeURIComponent;\n  if (lib.isString(obj)) {\n    return enc(obj);\n  } else {\n    let keyvals = (lib.isArray(obj)) ? obj : lib._entries(obj);\n    return keyvals.map(([k, v]) => `${enc(k)}=${enc(v)}`).join('&');\n  }\n}\n\nexports.urlencode = urlencode;\n\n// For the jinja regexp, see\n// https://github.com/mitsuhiko/jinja2/blob/f15b814dcba6aa12bc74d1f7d0c881d55f7126be/jinja2/utils.py#L20-L23\nconst puncRe = /^(?:\\(|<|&lt;)?(.*?)(?:\\.|,|\\)|\\n|&gt;)?$/;\n// from http://blog.gerv.net/2011/05/html5_email_address_regexp/\nconst emailRe = /^[\\w.!#$%&'*+\\-\\/=?\\^`{|}~]+@[a-z\\d\\-]+(\\.[a-z\\d\\-]+)+$/i;\nconst httpHttpsRe = /^https?:\\/\\/.*$/;\nconst wwwRe = /^www\\./;\nconst tldRe = /\\.(?:org|net|com)(?:\\:|\\/|$)/;\n\nfunction urlize(str, length, nofollow) {\n  if (isNaN(length)) {\n    length = Infinity;\n  }\n\n  const noFollowAttr = (nofollow === true ? ' rel=\"nofollow\"' : '');\n\n  const words = str.split(/(\\s+)/).filter((word) => {\n    // If the word has no length, bail. This can happen for str with\n    // trailing whitespace.\n    return word && word.length;\n  }).map((word) => {\n    var matches = word.match(puncRe);\n    var possibleUrl = (matches) ? matches[1] : word;\n    var shortUrl = possibleUrl.substr(0, length);\n\n    // url that starts with http or https\n    if (httpHttpsRe.test(possibleUrl)) {\n      return `<a href=\"${possibleUrl}\"${noFollowAttr}>${shortUrl}</a>`;\n    }\n\n    // url that starts with www.\n    if (wwwRe.test(possibleUrl)) {\n      return `<a href=\"http://${possibleUrl}\"${noFollowAttr}>${shortUrl}</a>`;\n    }\n\n    // an email address of the form username@domain.tld\n    if (emailRe.test(possibleUrl)) {\n      return `<a href=\"mailto:${possibleUrl}\">${possibleUrl}</a>`;\n    }\n\n    // url that ends in .com, .org or .net that is not an email address\n    if (tldRe.test(possibleUrl)) {\n      return `<a href=\"http://${possibleUrl}\"${noFollowAttr}>${shortUrl}</a>`;\n    }\n\n    return word;\n  });\n\n  return words.join('');\n}\n\nexports.urlize = urlize;\n\nfunction wordcount(str) {\n  str = normalize(str, '');\n  const words = (str) ? str.match(/\\w+/g) : null;\n  return (words) ? words.length : null;\n}\n\nexports.wordcount = wordcount;\n\nfunction float(val, def) {\n  var res = parseFloat(val);\n  return (isNaN(res)) ? def : res;\n}\n\nexports.float = float;\n\nfunction int(val, def) {\n  var res = parseInt(val, 10);\n  return (isNaN(res)) ? def : res;\n}\n\nexports.int = int;\n\n// Aliases\nexports.d = exports.default;\nexports.e = exports.escape;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/filters.js","'use strict';\n\nconst Loader = require('./loader');\n\nclass PrecompiledLoader extends Loader {\n  constructor(compiledTemplates) {\n    super();\n    this.precompiled = compiledTemplates || {};\n  }\n\n  getSource(name) {\n    if (this.precompiled[name]) {\n      return {\n        src: {\n          type: 'code',\n          obj: this.precompiled[name]\n        },\n        path: name\n      };\n    }\n    return null;\n  }\n}\n\nmodule.exports = {\n  PrecompiledLoader: PrecompiledLoader,\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/precompiled-loader.js","'use strict';\n\nvar SafeString = require('./runtime').SafeString;\n\n/**\n * Returns `true` if the object is a function, otherwise `false`.\n * @param { any } value\n * @returns { boolean }\n */\nfunction callable(value) {\n  return typeof value === 'function';\n}\n\nexports.callable = callable;\n\n/**\n * Returns `true` if the object is strictly not `undefined`.\n * @param { any } value\n * @returns { boolean }\n */\nfunction defined(value) {\n  return value !== undefined;\n}\n\nexports.defined = defined;\n\n/**\n * Returns `true` if the operand (one) is divisble by the test's argument\n * (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction divisibleby(one, two) {\n  return (one % two) === 0;\n}\n\nexports.divisibleby = divisibleby;\n\n/**\n * Returns true if the string has been escaped (i.e., is a SafeString).\n * @param { any } value\n * @returns { boolean }\n */\nfunction escaped(value) {\n  return value instanceof SafeString;\n}\n\nexports.escaped = escaped;\n\n/**\n * Returns `true` if the arguments are strictly equal.\n * @param { any } one\n * @param { any } two\n */\nfunction equalto(one, two) {\n  return one === two;\n}\n\nexports.equalto = equalto;\n\n// Aliases\nexports.eq = exports.equalto;\nexports.sameas = exports.equalto;\n\n/**\n * Returns `true` if the value is evenly divisible by 2.\n * @param { number } value\n * @returns { boolean }\n */\nfunction even(value) {\n  return value % 2 === 0;\n}\n\nexports.even = even;\n\n/**\n * Returns `true` if the value is falsy - if I recall correctly, '', 0, false,\n * undefined, NaN or null. I don't know if we should stick to the default JS\n * behavior or attempt to replicate what Python believes should be falsy (i.e.,\n * empty arrays, empty dicts, not 0...).\n * @param { any } value\n * @returns { boolean }\n */\nfunction falsy(value) {\n  return !value;\n}\n\nexports.falsy = falsy;\n\n/**\n * Returns `true` if the operand (one) is greater or equal to the test's\n * argument (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction ge(one, two) {\n  return one >= two;\n}\n\nexports.ge = ge;\n\n/**\n * Returns `true` if the operand (one) is greater than the test's argument\n * (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction greaterthan(one, two) {\n  return one > two;\n}\n\nexports.greaterthan = greaterthan;\n\n// alias\nexports.gt = exports.greaterthan;\n\n/**\n * Returns `true` if the operand (one) is less than or equal to the test's\n * argument (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction le(one, two) {\n  return one <= two;\n}\n\nexports.le = le;\n\n/**\n * Returns `true` if the operand (one) is less than the test's passed argument\n * (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction lessthan(one, two) {\n  return one < two;\n}\n\nexports.lessthan = lessthan;\n\n// alias\nexports.lt = exports.lessthan;\n\n/**\n * Returns `true` if the string is lowercased.\n * @param { string } value\n * @returns { boolean }\n */\nfunction lower(value) {\n  return value.toLowerCase() === value;\n}\n\nexports.lower = lower;\n\n/**\n * Returns `true` if the operand (one) is less than or equal to the test's\n * argument (two).\n * @param { number } one\n * @param { number } two\n * @returns { boolean }\n */\nfunction ne(one, two) {\n  return one !== two;\n}\n\nexports.ne = ne;\n\n/**\n * Returns true if the value is strictly equal to `null`.\n * @param { any }\n * @returns { boolean }\n */\nfunction nullTest(value) {\n  return value === null;\n}\n\nexports.null = nullTest;\n\n/**\n * Returns true if value is a number.\n * @param { any }\n * @returns { boolean }\n */\nfunction number(value) {\n  return typeof value === 'number';\n}\n\nexports.number = number;\n\n/**\n * Returns `true` if the value is *not* evenly divisible by 2.\n * @param { number } value\n * @returns { boolean }\n */\nfunction odd(value) {\n  return value % 2 === 1;\n}\n\nexports.odd = odd;\n\n/**\n * Returns `true` if the value is a string, `false` if not.\n * @param { any } value\n * @returns { boolean }\n */\nfunction string(value) {\n  return typeof value === 'string';\n}\n\nexports.string = string;\n\n/**\n * Returns `true` if the value is not in the list of things considered falsy:\n * '', null, undefined, 0, NaN and false.\n * @param { any } value\n * @returns { boolean }\n */\nfunction truthy(value) {\n  return !!value;\n}\n\nexports.truthy = truthy;\n\n/**\n * Returns `true` if the value is undefined.\n * @param { any } value\n * @returns { boolean }\n */\nfunction undefinedTest(value) {\n  return value === undefined;\n}\n\nexports.undefined = undefinedTest;\n\n/**\n * Returns `true` if the string is uppercased.\n * @param { string } value\n * @returns { boolean }\n */\nfunction upper(value) {\n  return value.toUpperCase() === value;\n}\n\nexports.upper = upper;\n\n/**\n * If ES6 features are available, returns `true` if the value implements the\n * `Symbol.iterator` method. If not, it's a string or Array.\n *\n * Could potentially cause issues if a browser exists that has Set and Map but\n * not Symbol.\n *\n * @param { any } value\n * @returns { boolean }\n */\nfunction iterable(value) {\n  if (typeof Symbol !== 'undefined') {\n    return !!value[Symbol.iterator];\n  } else {\n    return Array.isArray(value) || typeof value === 'string';\n  }\n}\n\nexports.iterable = iterable;\n\n/**\n * If ES6 features are available, returns `true` if the value is an object hash\n * or an ES6 Map. Otherwise just return if it's an object hash.\n * @param { any } value\n * @returns { boolean }\n */\nfunction mapping(value) {\n  // only maps and object hashes\n  var bool = value !== null\n    && value !== undefined\n    && typeof value === 'object'\n    && !Array.isArray(value);\n  if (Set) {\n    return bool && !(value instanceof Set);\n  } else {\n    return bool;\n  }\n}\n\nexports.mapping = mapping;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/tests.js","'use strict';\n\nfunction cycler(items) {\n  var index = -1;\n\n  return {\n    current: null,\n    reset() {\n      index = -1;\n      this.current = null;\n    },\n\n    next() {\n      index++;\n      if (index >= items.length) {\n        index = 0;\n      }\n\n      this.current = items[index];\n      return this.current;\n    },\n  };\n}\n\nfunction joiner(sep) {\n  sep = sep || ',';\n  let first = true;\n\n  return () => {\n    const val = first ? '' : sep;\n    first = false;\n    return val;\n  };\n}\n\n// Making this a function instead so it returns a new object\n// each time it's called. That way, if something like an environment\n// uses it, they will each have their own copy.\nfunction globals() {\n  return {\n    range(start, stop, step) {\n      if (typeof stop === 'undefined') {\n        stop = start;\n        start = 0;\n        step = 1;\n      } else if (!step) {\n        step = 1;\n      }\n\n      const arr = [];\n      if (step > 0) {\n        for (let i = start; i < stop; i += step) {\n          arr.push(i);\n        }\n      } else {\n        for (let i = start; i > stop; i += step) { // eslint-disable-line for-direction\n          arr.push(i);\n        }\n      }\n      return arr;\n    },\n\n    cycler() {\n      return cycler(Array.prototype.slice.call(arguments));\n    },\n\n    joiner(sep) {\n      return joiner(sep);\n    }\n  };\n}\n\nmodule.exports = globals;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/globals.js","const path = require('path');\n\nmodule.exports = function express(env, app) {\n  function NunjucksView(name, opts) {\n    this.name = name;\n    this.path = name;\n    this.defaultEngine = opts.defaultEngine;\n    this.ext = path.extname(name);\n    if (!this.ext && !this.defaultEngine) {\n      throw new Error('No default engine was specified and no extension was provided.');\n    }\n    if (!this.ext) {\n      this.name += (this.ext = (this.defaultEngine[0] !== '.' ? '.' : '') + this.defaultEngine);\n    }\n  }\n\n  NunjucksView.prototype.render = function render(opts, cb) {\n    env.render(this.name, opts, cb);\n  };\n\n  app.set('view', NunjucksView);\n  app.set('nunjucksEnv', env);\n  return env;\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/express-app.js","'use strict';\n\nconst fs = require('fs');\nconst path = require('path');\nconst {_prettifyError} = require('./lib');\nconst compiler = require('./compiler');\nconst {Environment} = require('./environment');\nconst precompileGlobal = require('./precompile-global');\n\nfunction match(filename, patterns) {\n  if (!Array.isArray(patterns)) {\n    return false;\n  }\n  return patterns.some((pattern) => filename.match(pattern));\n}\n\nfunction precompileString(str, opts) {\n  opts = opts || {};\n  opts.isString = true;\n  const env = opts.env || new Environment([]);\n  const wrapper = opts.wrapper || precompileGlobal;\n\n  if (!opts.name) {\n    throw new Error('the \"name\" option is required when compiling a string');\n  }\n  return wrapper([_precompile(str, opts.name, env)], opts);\n}\n\nfunction precompile(input, opts) {\n  // The following options are available:\n  //\n  // * name: name of the template (auto-generated when compiling a directory)\n  // * isString: input is a string, not a file path\n  // * asFunction: generate a callable function\n  // * force: keep compiling on error\n  // * env: the Environment to use (gets extensions and async filters from it)\n  // * include: which file/folders to include (folders are auto-included, files are auto-excluded)\n  // * exclude: which file/folders to exclude (folders are auto-included, files are auto-excluded)\n  // * wrapper: function(templates, opts) {...}\n  //       Customize the output format to store the compiled template.\n  //       By default, templates are stored in a global variable used by the runtime.\n  //       A custom loader will be necessary to load your custom wrapper.\n\n  opts = opts || {};\n  const env = opts.env || new Environment([]);\n  const wrapper = opts.wrapper || precompileGlobal;\n\n  if (opts.isString) {\n    return precompileString(input, opts);\n  }\n\n  const pathStats = fs.existsSync(input) && fs.statSync(input);\n  const precompiled = [];\n  const templates = [];\n\n  function addTemplates(dir) {\n    fs.readdirSync(dir).forEach((file) => {\n      const filepath = path.join(dir, file);\n      let subpath = filepath.substr(path.join(input, '/').length);\n      const stat = fs.statSync(filepath);\n\n      if (stat && stat.isDirectory()) {\n        subpath += '/';\n        if (!match(subpath, opts.exclude)) {\n          addTemplates(filepath);\n        }\n      } else if (match(subpath, opts.include)) {\n        templates.push(filepath);\n      }\n    });\n  }\n\n  if (pathStats.isFile()) {\n    precompiled.push(_precompile(\n      fs.readFileSync(input, 'utf-8'),\n      opts.name || input,\n      env\n    ));\n  } else if (pathStats.isDirectory()) {\n    addTemplates(input);\n\n    for (let i = 0; i < templates.length; i++) {\n      const name = templates[i].replace(path.join(input, '/'), '');\n\n      try {\n        precompiled.push(_precompile(\n          fs.readFileSync(templates[i], 'utf-8'),\n          name,\n          env\n        ));\n      } catch (e) {\n        if (opts.force) {\n          // Don't stop generating the output if we're\n          // forcing compilation.\n          console.error(e); // eslint-disable-line no-console\n        } else {\n          throw e;\n        }\n      }\n    }\n  }\n\n  return wrapper(precompiled, opts);\n}\n\nfunction _precompile(str, name, env) {\n  env = env || new Environment([]);\n\n  const asyncFilters = env.asyncFilters;\n  const extensions = env.extensionsList;\n  let template;\n\n  name = name.replace(/\\\\/g, '/');\n\n  try {\n    template = compiler.compile(str,\n      asyncFilters,\n      extensions,\n      name,\n      env.opts);\n  } catch (err) {\n    throw _prettifyError(name, false, err);\n  }\n\n  return {\n    name: name,\n    template: template\n  };\n}\n\nmodule.exports = {\n  precompile: precompile,\n  precompileString: precompileString\n};\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/precompile.js","'use strict';\n\nfunction precompileGlobal(templates, opts) {\n  var out = '';\n  opts = opts || {};\n\n  for (let i = 0; i < templates.length; i++) {\n    const name = JSON.stringify(templates[i].name);\n    const template = templates[i].template;\n\n    out += '(function() {' +\n      '(window.nunjucksPrecompiled = window.nunjucksPrecompiled || {})' +\n      '[' + name + '] = (function() {\\n' + template + '\\n})();\\n';\n\n    if (opts.asFunction) {\n      out += 'return function(ctx, cb) { return nunjucks.render(' + name + ', ctx, cb); }\\n';\n    }\n\n    out += '})();\\n';\n  }\n  return out;\n}\n\nmodule.exports = precompileGlobal;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/precompile-global.js","function installCompat() {\n  'use strict';\n\n  /* eslint-disable camelcase */\n\n  // This must be called like `nunjucks.installCompat` so that `this`\n  // references the nunjucks instance\n  var runtime = this.runtime;\n  var lib = this.lib;\n  // Handle slim case where these 'modules' are excluded from the built source\n  var Compiler = this.compiler.Compiler;\n  var Parser = this.parser.Parser;\n  var nodes = this.nodes;\n  var lexer = this.lexer;\n\n  var orig_contextOrFrameLookup = runtime.contextOrFrameLookup;\n  var orig_memberLookup = runtime.memberLookup;\n  var orig_Compiler_assertType;\n  var orig_Parser_parseAggregate;\n  if (Compiler) {\n    orig_Compiler_assertType = Compiler.prototype.assertType;\n  }\n  if (Parser) {\n    orig_Parser_parseAggregate = Parser.prototype.parseAggregate;\n  }\n\n  function uninstall() {\n    runtime.contextOrFrameLookup = orig_contextOrFrameLookup;\n    runtime.memberLookup = orig_memberLookup;\n    if (Compiler) {\n      Compiler.prototype.assertType = orig_Compiler_assertType;\n    }\n    if (Parser) {\n      Parser.prototype.parseAggregate = orig_Parser_parseAggregate;\n    }\n  }\n\n  runtime.contextOrFrameLookup = function contextOrFrameLookup(context, frame, key) {\n    var val = orig_contextOrFrameLookup.apply(this, arguments);\n    if (val !== undefined) {\n      return val;\n    }\n    switch (key) {\n      case 'True':\n        return true;\n      case 'False':\n        return false;\n      case 'None':\n        return null;\n      default:\n        return undefined;\n    }\n  };\n\n  function getTokensState(tokens) {\n    return {\n      index: tokens.index,\n      lineno: tokens.lineno,\n      colno: tokens.colno\n    };\n  }\n\n  if (process.env.BUILD_TYPE !== 'SLIM' && nodes && Compiler && Parser) { // i.e., not slim mode\n    const Slice = nodes.Node.extend('Slice', {\n      fields: ['start', 'stop', 'step'],\n      init(lineno, colno, start, stop, step) {\n        start = start || new nodes.Literal(lineno, colno, null);\n        stop = stop || new nodes.Literal(lineno, colno, null);\n        step = step || new nodes.Literal(lineno, colno, 1);\n        this.parent(lineno, colno, start, stop, step);\n      }\n    });\n\n    Compiler.prototype.assertType = function assertType(node) {\n      if (node instanceof Slice) {\n        return;\n      }\n      orig_Compiler_assertType.apply(this, arguments);\n    };\n    Compiler.prototype.compileSlice = function compileSlice(node, frame) {\n      this._emit('(');\n      this._compileExpression(node.start, frame);\n      this._emit('),(');\n      this._compileExpression(node.stop, frame);\n      this._emit('),(');\n      this._compileExpression(node.step, frame);\n      this._emit(')');\n    };\n\n    Parser.prototype.parseAggregate = function parseAggregate() {\n      var origState = getTokensState(this.tokens);\n      // Set back one accounting for opening bracket/parens\n      origState.colno--;\n      origState.index--;\n      try {\n        return orig_Parser_parseAggregate.apply(this);\n      } catch (e) {\n        const errState = getTokensState(this.tokens);\n        const rethrow = () => {\n          lib._assign(this.tokens, errState);\n          return e;\n        };\n\n        // Reset to state before original parseAggregate called\n        lib._assign(this.tokens, origState);\n        this.peeked = false;\n\n        const tok = this.peekToken();\n        if (tok.type !== lexer.TOKEN_LEFT_BRACKET) {\n          throw rethrow();\n        } else {\n          this.nextToken();\n        }\n\n        const node = new Slice(tok.lineno, tok.colno);\n\n        // If we don't encounter a colon while parsing, this is not a slice,\n        // so re-raise the original exception.\n        let isSlice = false;\n\n        for (let i = 0; i <= node.fields.length; i++) {\n          if (this.skip(lexer.TOKEN_RIGHT_BRACKET)) {\n            break;\n          }\n          if (i === node.fields.length) {\n            if (isSlice) {\n              this.fail('parseSlice: too many slice components', tok.lineno, tok.colno);\n            } else {\n              break;\n            }\n          }\n          if (this.skip(lexer.TOKEN_COLON)) {\n            isSlice = true;\n          } else {\n            const field = node.fields[i];\n            node[field] = this.parseExpression();\n            isSlice = this.skip(lexer.TOKEN_COLON) || isSlice;\n          }\n        }\n        if (!isSlice) {\n          throw rethrow();\n        }\n        return new nodes.Array(tok.lineno, tok.colno, [node]);\n      }\n    };\n  }\n\n  function sliceLookup(obj, start, stop, step) {\n    obj = obj || [];\n    if (start === null) {\n      start = (step < 0) ? (obj.length - 1) : 0;\n    }\n    if (stop === null) {\n      stop = (step < 0) ? -1 : obj.length;\n    } else if (stop < 0) {\n      stop += obj.length;\n    }\n\n    if (start < 0) {\n      start += obj.length;\n    }\n\n    const results = [];\n\n    for (let i = start; ; i += step) {\n      if (i < 0 || i > obj.length) {\n        break;\n      }\n      if (step > 0 && i >= stop) {\n        break;\n      }\n      if (step < 0 && i <= stop) {\n        break;\n      }\n      results.push(runtime.memberLookup(obj, i));\n    }\n    return results;\n  }\n\n  function hasOwnProp(obj, key) {\n    return Object.prototype.hasOwnProperty.call(obj, key);\n  }\n\n  const ARRAY_MEMBERS = {\n    pop(index) {\n      if (index === undefined) {\n        return this.pop();\n      }\n      if (index >= this.length || index < 0) {\n        throw new Error('KeyError');\n      }\n      return this.splice(index, 1);\n    },\n    append(element) {\n      return this.push(element);\n    },\n    remove(element) {\n      for (let i = 0; i < this.length; i++) {\n        if (this[i] === element) {\n          return this.splice(i, 1);\n        }\n      }\n      throw new Error('ValueError');\n    },\n    count(element) {\n      var count = 0;\n      for (let i = 0; i < this.length; i++) {\n        if (this[i] === element) {\n          count++;\n        }\n      }\n      return count;\n    },\n    index(element) {\n      var i;\n      if ((i = this.indexOf(element)) === -1) {\n        throw new Error('ValueError');\n      }\n      return i;\n    },\n    find(element) {\n      return this.indexOf(element);\n    },\n    insert(index, elem) {\n      return this.splice(index, 0, elem);\n    }\n  };\n  const OBJECT_MEMBERS = {\n    items() {\n      return lib._entries(this);\n    },\n    values() {\n      return lib._values(this);\n    },\n    keys() {\n      return lib.keys(this);\n    },\n    get(key, def) {\n      var output = this[key];\n      if (output === undefined) {\n        output = def;\n      }\n      return output;\n    },\n    has_key(key) {\n      return hasOwnProp(this, key);\n    },\n    pop(key, def) {\n      var output = this[key];\n      if (output === undefined && def !== undefined) {\n        output = def;\n      } else if (output === undefined) {\n        throw new Error('KeyError');\n      } else {\n        delete this[key];\n      }\n      return output;\n    },\n    popitem() {\n      const keys = lib.keys(this);\n      if (!keys.length) {\n        throw new Error('KeyError');\n      }\n      const k = keys[0];\n      const val = this[k];\n      delete this[k];\n      return [k, val];\n    },\n    setdefault(key, def = null) {\n      if (!(key in this)) {\n        this[key] = def;\n      }\n      return this[key];\n    },\n    update(kwargs) {\n      lib._assign(this, kwargs);\n      return null; // Always returns None\n    }\n  };\n  OBJECT_MEMBERS.iteritems = OBJECT_MEMBERS.items;\n  OBJECT_MEMBERS.itervalues = OBJECT_MEMBERS.values;\n  OBJECT_MEMBERS.iterkeys = OBJECT_MEMBERS.keys;\n\n  runtime.memberLookup = function memberLookup(obj, val, autoescape) {\n    if (arguments.length === 4) {\n      return sliceLookup.apply(this, arguments);\n    }\n    obj = obj || {};\n\n    // If the object is an object, return any of the methods that Python would\n    // otherwise provide.\n    if (lib.isArray(obj) && hasOwnProp(ARRAY_MEMBERS, val)) {\n      return ARRAY_MEMBERS[val].bind(obj);\n    }\n    if (lib.isObject(obj) && hasOwnProp(OBJECT_MEMBERS, val)) {\n      return OBJECT_MEMBERS[val].bind(obj);\n    }\n\n    return orig_memberLookup.apply(this, arguments);\n  };\n\n  return uninstall;\n}\n\nmodule.exports = installCompat;\n\n\n\n// WEBPACK FOOTER //\n// ./nunjucks/src/jinja-compat.js"],"sourceRoot":""}