Generate all runtime files from dart.

lib/runtime/dart/_runtime.js

-// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
+dart_library.library('dart/_runtime', null, /* Imports */[
+], /* Lazy imports */[
+  'dart/core',
+  'dart/_interceptors',
+  'dart/_js_helper',
+  'dart/async',
+  'dart/collection'
+], function(exports, core, _interceptors, _js_helper, async$, collection) {
+  'use strict';
+  function mixin(base, ...mixins) {
+    class Mixin extends base {
+      [base.name](...args) {
+        for (let i = mixins.length - 1; i >= 0; i--) {
+          let mixin = mixins[i];
+          let init = mixin.prototype[mixin.name];
+          if (init) init.call(this);
+        }
+        let init = base.prototype[base.name];
+        if (init) init.apply(this, args);
+      }
+    }
+    for (let m of mixins) {
+      copyProperties(Mixin.prototype, m.prototype);
+    }
+    setSignature(Mixin, {
+      methods: () => {
+        let s = {};
+        for (let m of mixins) {
+          copyProperties(s, m[_methodSig]);
+        }
+        return s;
+      }
+    });
+    Mixin[_mixins] = mixins;
+    return Mixin;
+  }
+  function getMixins(clazz) {
+    return clazz[_mixins];
+  }
+  function getImplements(clazz) {
+    return clazz[implements$];
+  }
+  const _typeArguments = Symbol("typeArguments");
+  const _originalDeclaration = Symbol("originalDeclaration");
+  function generic(typeConstructor) {
+    let length = typeConstructor.length;
+    if (length < 1) {
+      throwInternalError('must have at least one generic type argument');
+    }
+    let resultMap = new Map();
+    function makeGenericType(...args) {
+      if (args.length != length && args.length != 0) {
+        throwInternalError('requires ' + length + ' or 0 type arguments');
+      }
+      while (args.length < length)
+        args.push(dynamic);
+      let value = resultMap;
+      for (let i = 0; i < length; i++) {
+        let arg = args[i];
+        if (arg == null) {
+          throwInternalError('type arguments should not be null: ' + typeConstructor);
+        }
+        let map = value;
+        value = map.get(arg);
+        if (value === void 0) {
+          if (i + 1 == length) {
+            value = typeConstructor.apply(null, args);
+            if (value) {
+              value[_typeArguments] = args;
+              value[_originalDeclaration] = makeGenericType;
+            }
+          } else {
+            value = new Map();
+          }
+          map.set(arg, value);
+        }
+      }
+      return value;
+    }
+    return makeGenericType;
+  }
+  function getGenericClass(type) {
+    return safeGetOwnProperty(type, _originalDeclaration);
+  }
+  function getGenericArgs(type) {
+    return safeGetOwnProperty(type, _typeArguments);
+  }
+  const _constructorSig = Symbol("sigCtor");
+  const _methodSig = Symbol("sig");
+  const _staticSig = Symbol("sigStatic");
+  function getMethodType(obj, name) {
+    if (obj === void 0) return void 0;
+    if (obj == null) return void 0;
+    let sigObj = obj.__proto__.constructor[_methodSig];
+    if (sigObj === void 0) return void 0;
+    let parts = sigObj[name];
+    if (parts === void 0) return void 0;
+    return definiteFunctionType.apply(null, parts);
+  }
+  function classGetConstructorType(cls, name) {
+    if (!name) name = cls.name;
+    if (cls === void 0) return void 0;
+    if (cls == null) return void 0;
+    let sigCtor = cls[_constructorSig];
+    if (sigCtor === void 0) return void 0;
+    let parts = sigCtor[name];
+    if (parts === void 0) return void 0;
+    return definiteFunctionType.apply(null, parts);
+  }
+  function bind(obj, name, f) {
+    if (f === void 0) f = obj[name];
+    f = f.bind(obj);
+    let sig = getMethodType(obj, name);
+    assert(sig);
+    tag(f, sig);
+    return f;
+  }
+  function _setMethodSignature(f, sigF) {
+    defineMemoizedGetter(f, _methodSig, () => {
+      let sigObj = sigF();
+      sigObj.__proto__ = f.__proto__[_methodSig];
+      return sigObj;
+    });
+  }
+  function _setConstructorSignature(f, sigF) {
+    return defineMemoizedGetter(f, _constructorSig, sigF);
+  }
+  function _setStaticSignature(f, sigF) {
+    return defineMemoizedGetter(f, _staticSig, sigF);
+  }
+  function _setStaticTypes(f, names) {
+    for (let name of names) {
+      tagMemoized(f[name], function() {
+        let parts = f[_staticSig][name];
+        return definiteFunctionType.apply(null, parts);
+      });
+    }
+  }
+  function setSignature(f, signature) {
+    let constructors = 'constructors' in signature ? signature.constructors : () => ({});
+    let methods = 'methods' in signature ? signature.methods : () => ({});
+    let statics = 'statics' in signature ? signature.statics : () => ({});
+    let names = 'names' in signature ? signature.names : [];
+    _setConstructorSignature(f, constructors);
+    _setMethodSignature(f, methods);
+    _setStaticSignature(f, statics);
+    _setStaticTypes(f, names);
+    tagMemoized(f, () => core.Type);
+  }
+  function hasMethod(obj, name) {
+    return getMethodType(obj, name) !== void 0;
+  }
+  function virtualField(subclass, fieldName) {
+    let prop = getOwnPropertyDescriptor(subclass.prototype, fieldName);
+    if (prop) return;
+    let symbol = Symbol(subclass.name + '.' + fieldName);
+    defineProperty(subclass.prototype, fieldName, {
+      get: function() {
+        return this[symbol];
+      },
+      set: function(x) {
+        this[symbol] = x;
+      }
+    });
+  }
+  function defineNamedConstructor(clazz, name) {
+    let proto = clazz.prototype;
+    let initMethod = proto[name];
+    let ctor = function() {
+      return initMethod.apply(this, arguments);
+    };
+    ctor.prototype = proto;
+    defineProperty(clazz, name, {value: ctor, configurable: true});
+  }
+  const _extensionType = Symbol("extensionType");
+  const dartx = {};
+  function getExtensionSymbol(name) {
+    let sym = dartx[name];
+    if (!sym) dartx[name] = sym = Symbol('dartx.' + name);
+    return sym;
+  }
+  function defineExtensionNames(names) {
+    return names.forEach(getExtensionSymbol);
+  }
+  function registerExtension(jsType, dartExtType) {
+    let extProto = dartExtType.prototype;
+    let jsProto = jsType.prototype;
+    assert(jsProto[_extensionType] === void 0);
+    jsProto[_extensionType] = extProto;
+    let dartObjProto = core.Object.prototype;
+    while (extProto !== dartObjProto && extProto !== jsProto) {
+      copyTheseProperties(jsProto, extProto, getOwnPropertySymbols(extProto));
+      extProto = extProto.__proto__;
+    }
+    let originalSigFn = getOwnPropertyDescriptor(dartExtType, _methodSig).get;
+    assert(originalSigFn);
+    defineMemoizedGetter(jsType, _methodSig, originalSigFn);
+  }
+  function defineExtensionMembers(type, methodNames) {
+    let proto = type.prototype;
+    for (let name of methodNames) {
+      let method = getOwnPropertyDescriptor(proto, name);
+      defineProperty(proto, getExtensionSymbol(name), method);
+    }
+    let originalSigFn = getOwnPropertyDescriptor(type, _methodSig).get;
+    defineMemoizedGetter(type, _methodSig, function() {
+      let sig = originalSigFn();
+      for (let name of methodNames) {
+        sig[getExtensionSymbol(name)] = sig[name];
+      }
+      return sig;
+    });
+  }
+  function canonicalMember(obj, name) {
+    if (obj != null && obj[_extensionType]) return dartx[name];
+    if (name == 'constructor' || name == 'prototype') {
+      name = '+' + name;
+    }
+    return name;
+  }
+  function setType(obj, type) {
+    obj.__proto__ = type.prototype;
+    return obj;
+  }
+  function list(obj, elementType) {
+    return setType(obj, _interceptors.JSArray$(elementType));
+  }
+  function setBaseClass(derived, base) {
+    derived.prototype.__proto__ = base.prototype;
+  }
+  function throwCastError(actual, type) {
+    throw$(new _js_helper.CastErrorImplementation(actual, type));
+  }
+  function throwAssertionError() {
+    throw$(new core.AssertionError());
+  }
+  function throwNullValueError() {
+    throw$(new core.NoSuchMethodError(null, new core.Symbol('<Unexpected Null Value>'), null, null, null));
+  }
+  const _jsIterator = Symbol("_jsIterator");
+  const _current = Symbol("_current");
+  function syncStar(gen, E, ...args) {
+    const SyncIterable_E = _js_helper.SyncIterable$(E);
+    return new SyncIterable_E(gen, args);
+  }
+  function async(gen, T, ...args) {
+    let iter;
+    function onValue(res) {
+      if (res === void 0) res = null;
+      return next(iter.next(res));
+    }
+    function onError(err) {
+      return next(iter.throw(err));
+    }
+    function next(ret) {
+      if (ret.done) return ret.value;
+      let future = ret.value;
+      if (!instanceOf(future, async$.Future$)) {
+        future = async$.Future.value(future);
+      }
+      return future.then(onValue, {onError: onError});
+    }
+    return async$.Future$(T).new(function() {
+      iter = gen(...args)[Symbol.iterator]();
+      return onValue();
+    });
+  }
+  const _AsyncStarStreamController = class _AsyncStarStreamController {
+    constructor(generator, T, args) {
+      this.isAdding = false;
+      this.isWaiting = false;
+      this.isScheduled = false;
+      this.isSuspendedAtYield = false;
+      this.canceler = null;
+      this.iterator = generator(this, ...args)[Symbol.iterator]();
+      this.controller = async$.StreamController$(T).new({
+        onListen: (() => this.scheduleGenerator()).bind(this),
+        onResume: (() => this.onResume()).bind(this),
+        onCancel: (() => this.onCancel()).bind(this)
+      });
+    }
+    onResume() {
+      if (this.isSuspendedAtYield) {
+        this.scheduleGenerator();
+      }
+    }
+    onCancel() {
+      if (this.controller.isClosed) {
+        return null;
+      }
+      if (this.canceler == null) {
+        this.canceler = async$.Completer.new();
+        this.scheduleGenerator();
+      }
+      return this.canceler.future;
+    }
+    close() {
+      if (this.canceler != null && !this.canceler.isCompleted) {
+        this.canceler.complete();
+      }
+      this.controller.close();
+    }
+    scheduleGenerator() {
+      if (this.isScheduled || this.controller.isPaused || this.isAdding || this.isWaiting) {
+        return;
+      }
+      this.isScheduled = true;
+      async$.scheduleMicrotask((() => this.runBody()).bind(this));
+    }
+    runBody(opt_awaitValue) {
+      this.isScheduled = false;
+      this.isSuspendedAtYield = false;
+      this.isWaiting = false;
+      let iter;
+      try {
+        iter = this.iterator.next(opt_awaitValue);
+      } catch (e) {
+        this.addError(e, stackTrace(e));
+        this.close();
+        return;
+      }
 
-dart_library.library('dart/_runtime', null, /* Imports */[
-  'dart/_utils',
-  'dart/_classes',
-  'dart/_errors',
-  'dart/_generators',
-  'dart/_operations',
-  'dart/_rtti',
-  'dart/_types',
-], /* Lazy Imports */[
-  'dart/_js_helper'
-], function(exports, dart_utils, classes, errors, generators, operations, rtti, types,
-    _js_helper) {
-  'use strict';
+      if (iter.done) {
+        this.close();
+        return;
+      }
+      if (this.isSuspendedAtYield || this.isAdding) return;
+      this.isWaiting = true;
+      let future = iter.value;
+      if (!instanceOf(future, async$.Future$)) {
+        future = async$.Future.value(future);
+      }
+      return future.then((x => this.runBody(x)).bind(this), {
+        onError: ((e, s) => this.throwError(e, s)).bind(this)
+      });
+    }
+    add(event) {
+      if (!this.controller.hasListener) return true;
+      this.controller.add(event);
+      this.scheduleGenerator();
+      this.isSuspendedAtYield = true;
+      return false;
+    }
+    addStream(stream) {
+      if (!this.controller.hasListener) return true;
+      this.isAdding = true;
+      this.controller.addStream(stream, {cancelOnError: false}).then((() => {
+        this.isAdding = false;
+        this.scheduleGenerator();
+      }).bind(this), {
+        onError: ((e, s) => this.throwError(e, s)).bind(this)
+      });
+    }
+    throwError(error, stackTrace) {
+      try {
+        this.iterator.throw(error);
+      } catch (e) {
+        this.addError(e, stackTrace);
+      }
 
-  function _export(value) {
-    if (value) return value;
-    console.log("Re-exporting null field: " + name);
-    throw "Bad export";
-  }
-
-  function exportFrom(value, names) {
+    }
+    addError(error, stackTrace) {
+      if (this.canceler != null && !this.canceler.isCompleted) {
+        this.canceler.completeError(error, stackTrace);
+        return;
+      }
+      if (!this.controller.hasListener) return;
+      this.controller.addError(error, stackTrace);
+    }
+  };
+  function asyncStar(gen, T, ...args) {
+    return new _AsyncStarStreamController(gen, T, args).controller.stream;
+  }
+  function _canonicalFieldName(obj, name, args, displayName) {
+    name = canonicalMember(obj, name);
+    if (name) return name;
+    throwNoSuchMethodFunc(obj, displayName, args);
+  }
+  function dload(obj, field) {
+    field = _canonicalFieldName(obj, field, [], field);
+    if (hasMethod(obj, field)) {
+      return bind(obj, field);
+    }
+    let result = obj[field];
+    return result;
+  }
+  function dput(obj, field, value) {
+    field = _canonicalFieldName(obj, field, [value], field);
+    obj[field] = value;
+    return value;
+  }
+  function checkApply(type, actuals) {
+    if (actuals.length < type.args.length) return false;
+    let index = 0;
+    for (let i = 0; i < type.args.length; ++i) {
+      if (!instanceOfOrNull(actuals[i], type.args[i])) return false;
+      ++index;
+    }
+    if (actuals.length == type.args.length) return true;
+    let extras = actuals.length - type.args.length;
+    if (type.optionals.length > 0) {
+      if (extras > type.optionals.length) return false;
+      for (let i = 0, j = index; i < extras; ++i, ++j) {
+        if (!instanceOfOrNull(actuals[j], type.optionals[i])) return false;
+      }
+      return true;
+    }
+    if (extras != 1) return false;
+    if (getOwnPropertyNames(type.named).length == 0) return false;
+    let opts = actuals[index];
+    let names = getOwnPropertyNames(opts);
+    if (names.length == 0) return false;
+    for (var name of names) {
+      if (!hasOwnProperty.call(type.named, name)) {
+        return false;
+      }
+      if (!instanceOfOrNull(opts[name], type.named[name])) return false;
+    }
+    return true;
+  }
+  function throwNoSuchMethod(obj, name, pArgs, nArgs, extras) {
+    throw$(new core.NoSuchMethodError(obj, name, pArgs, nArgs, extras));
+  }
+  function throwNoSuchMethodFunc(obj, name, pArgs, opt_func) {
+    if (obj === void 0) obj = opt_func;
+    throwNoSuchMethod(obj, name, pArgs);
+  }
+  function checkAndCall(f, ftype, obj, args, name) {
+    if (!(f instanceof Function)) {
+      if (f != null) {
+        ftype = getMethodType(f, 'call');
+        f = f.call;
+      }
+      if (!(f instanceof Function)) {
+        throwNoSuchMethodFunc(obj, name, args);
+      }
+    }
+    if (ftype === void 0) {
+      ftype = read(f);
+    }
+    if (!ftype) {
+      return f.apply(obj, args);
+    }
+    if (checkApply(ftype, args)) {
+      return f.apply(obj, args);
+    }
+    throwNoSuchMethodFunc(obj, name, args, f);
+  }
+  function dcall(f, ...args) {
+    let ftype = read(f);
+    return checkAndCall(f, ftype, void 0, args, 'call');
+  }
+  function callMethod(obj, name, args, displayName) {
+    let symbol = _canonicalFieldName(obj, name, args, displayName);
+    let f = obj != null ? obj[symbol] : null;
+    let ftype = getMethodType(obj, name);
+    return checkAndCall(f, ftype, obj, args, displayName);
+  }
+  function dsend(obj, method, ...args) {
+    return callMethod(obj, method, args, method);
+  }
+  function dindex(obj, index) {
+    return callMethod(obj, 'get', [index], '[]');
+  }
+  function dsetindex(obj, index, value) {
+    callMethod(obj, 'set', [index, value], '[]=');
+    return value;
+  }
+  function _ignoreTypeFailure(actual, type) {
+    if (isSubtype(type, core.Iterable) && isSubtype(actual, core.Iterable) || isSubtype(type, async$.Future) && isSubtype(actual, async$.Future) || isSubtype(type, core.Map) && isSubtype(actual, core.Map) || isSubtype(type, core.Function) && isSubtype(actual, core.Function) || isSubtype(type, async$.Stream) && isSubtype(actual, async$.Stream) || isSubtype(type, async$.StreamSubscription) && isSubtype(actual, async$.StreamSubscription)) {
+      console.warn('Ignoring cast fail from ' + typeName(actual) + ' to ' + typeName(type));
+      return true;
+    }
+    return false;
+  }
+  function strongInstanceOf(obj, type, ignoreFromWhiteList) {
+    let actual = realRuntimeType(obj);
+    if (isSubtype(actual, type) || actual == jsobject) return true;
+    if (ignoreFromWhiteList == void 0) return false;
+    if (isGroundType(type)) return false;
+    if (_ignoreTypeFailure(actual, type)) return true;
+    return false;
+  }
+  function instanceOfOrNull(obj, type) {
+    if (obj == null || strongInstanceOf(obj, type, true)) return true;
+    return false;
+  }
+  function instanceOf(obj, type) {
+    if (strongInstanceOf(obj, type)) return true;
+    if (isGroundType(type)) return false;
+    let actual = realRuntimeType(obj);
+    throwStrongModeError('Strong mode is check failure: ' + typeName(actual) + ' does not soundly subtype ' + typeName(type));
+  }
+  function cast(obj, type) {
+    if (instanceOfOrNull(obj, type)) return obj;
+    let actual = realRuntimeType(obj);
+    if (isGroundType(type)) throwCastError(actual, type);
+    if (_ignoreTypeFailure(actual, type)) return obj;
+    throwStrongModeError('Strong mode cast failure from ' + typeName(actual) + ' to ' + typeName(type));
+  }
+  function asInt(obj) {
+    if (obj == null) {
+      return null;
+    }
+    if (Math.floor(obj) != obj) {
+      throwCastError(realRuntimeType(obj), core.int);
+    }
+    return obj;
+  }
+  function arity(f) {
+    return {min: f.length, max: f.length};
+  }
+  function equals(x, y) {
+    if (x == null || y == null) return x == y;
+    let eq = x['=='];
+    return eq ? eq.call(x, y) : x === y;
+  }
+  function notNull(x) {
+    if (x == null) throwNullValueError();
+    return x;
+  }
+  function map(values) {
+    let map = collection.LinkedHashMap.new();
+    if (Array.isArray(values)) {
+      for (let i = 0, end = values.length - 1; i < end; i += 2) {
+        let key = values[i];
+        let value = values[i + 1];
+        map.set(key, value);
+      }
+    } else if (typeof values === 'object') {
+      for (let key of getOwnPropertyNames(values)) {
+        map.set(key, values[key]);
+      }
+    }
+    return map;
+  }
+  function assert(condition) {
+    if (!condition) throwAssertionError();
+  }
+  const _stack = new WeakMap();
+  function throw$(obj) {
+    if (obj != null && (typeof obj == 'object' || typeof obj == 'function')) {
+      _stack.set(obj, new Error());
+    }
+    throw obj;
+  }
+  function getError(exception) {
+    var stack = _stack.get(exception);
+    return stack !== void 0 ? stack : exception;
+  }
+  function stackPrint(exception) {
+    var error = getError(exception);
+    console.log(error.stack ? error.stack : 'No stack trace for: ' + error);
+  }
+  function stackTrace(exception) {
+    var error = getError(exception);
+    return _js_helper.getTraceFromException(error);
+  }
+  function nullSafe(obj, ...callbacks) {
+    if (obj == null) return obj;
+    for (const callback of callbacks) {
+      obj = callback(obj);
+      if (obj == null) break;
+    }
+    return obj;
+  }
+  const _value = Symbol("_value");
+  function multiKeyPutIfAbsent(map, keys, valueFn) {
+    for (let k of keys) {
+      let value = map.get(k);
+      if (!value) {
+        map.set(k, value = new Map());
+      }
+      map = value;
+    }
+    if (map.has(_value)) return map.get(_value);
+    let value = valueFn();
+    map.set(_value, value);
+    return value;
+  }
+  const constants = new Map();
+  function const$(obj) {
+    let objectKey = [realRuntimeType(obj)];
+    for (let name of getOwnNamesAndSymbols(obj)) {
+      objectKey.push(name);
+      objectKey.push(obj[name]);
+    }
+    return multiKeyPutIfAbsent(constants, objectKey, () => obj);
+  }
+  function hashCode(obj) {
+    if (obj == null) {
+      return 0;
+    }
+    switch (typeof obj) {
+      case "number":
+      case "boolean":
+      {
+        return obj & 0x1FFFFFFF;
+      }
+      case "string":
+      {
+        return obj.length;
+      }
+    }
+    return obj.hashCode;
+  }
+  function toString(obj) {
+    if (obj == null) {
+      return "null";
+    }
+    return obj.toString();
+  }
+  function noSuchMethod(obj, invocation) {
+    if (obj == null) {
+      throwNoSuchMethod(obj, invocation.memberName, invocation.positionalArguments, invocation.namedArguments);
+    }
+    switch (typeof obj) {
+      case "number":
+      case "boolean":
+      case "string":
+      {
+        throwNoSuchMethod(obj, invocation.memberName, invocation.positionalArguments, invocation.namedArguments);
+      }
+    }
+    return obj.noSuchMethod(invocation);
+  }
+  const JsIterator = class JsIterator {
+    constructor(dartIterator) {
+      this.dartIterator = dartIterator;
+    }
+    next() {
+      let i = this.dartIterator;
+      let done = !i.moveNext();
+      return {done: done, value: done ? void 0 : i.current};
+    }
+  };
+  function fn(closure, ...args) {
+    if (args.length == 1) {
+      defineLazyProperty(closure, _runtimeType, {get: args[0]});
+      return closure;
+    }
+    let t;
+    if (args.length == 0) {
+      t = definiteFunctionType(dynamic, Array(closure.length).fill(dynamic));
+    } else {
+      t = definiteFunctionType.apply(null, args);
+    }
+    tag(closure, t);
+    return closure;
+  }
+  const _runtimeType = Symbol("_runtimeType");
+  function checkPrimitiveType(obj) {
+    switch (typeof obj) {
+      case "undefined":
+      {
+        return core.Null;
+      }
+      case "number":
+      {
+        return Math.floor(obj) == obj ? core.int : core.double;
+      }
+      case "boolean":
+      {
+        return core.bool;
+      }
+      case "string":
+      {
+        return core.String;
+      }
+      case "symbol":
+      {
+        return Symbol;
+      }
+    }
+    if (obj === null) return core.Null;
+    return null;
+  }
+  function runtimeType(obj) {
+    let result = checkPrimitiveType(obj);
+    if (result !== null) return result;
+    return obj.runtimeType;
+  }
+  function getFunctionType(obj) {
+    let args = Array(obj.length).fill(dynamic);
+    return definiteFunctionType(bottom, args);
+  }
+  function realRuntimeType(obj) {
+    let result = checkPrimitiveType(obj);
+    if (result !== null) return result;
+    result = obj[_runtimeType];
+    if (result) return result;
+    result = obj.constructor;
+    if (result == Function) {
+      return jsobject;
+    }
+    return result;
+  }
+  function LazyTagged(infoFn) {
+    class _Tagged {
+      get [_runtimeType]() {
+        return infoFn();
+      }
+    }
+    return _Tagged;
+  }
+  function read(value) {
+    return value[_runtimeType];
+  }
+  function tag(value, info) {
+    value[_runtimeType] = info;
+  }
+  function tagComputed(value, compute) {
+    defineProperty(value, _runtimeType, {get: compute});
+  }
+  function tagMemoized(value, compute) {
+    let cache = null;
+    function getter() {
+      if (compute == null) return cache;
+      cache = compute();
+      compute = null;
+      return cache;
+    }
+    tagComputed(value, getter);
+  }
+  const _mixins = Symbol("mixins");
+  const implements$ = Symbol("implements");
+  const metadata = Symbol("metadata");
+  const TypeRep = class TypeRep extends LazyTagged(() => core.Type) {
+    get name() {
+      return this.toString();
+    }
+  };
+  const Dynamic = class Dynamic extends TypeRep {
+    toString() {
+      return "dynamic";
+    }
+  };
+  const dynamic = new Dynamic();
+  const Void = class Void extends TypeRep {
+    toString() {
+      return "void";
+    }
+  };
+  const void$ = new Void();
+  const Bottom = class Bottom extends TypeRep {
+    toString() {
+      return "bottom";
+    }
+  };
+  const bottom = new Bottom();
+  const JSObject = class JSObject extends TypeRep {
+    toString() {
+      return "NativeJavaScriptObject";
+    }
+  };
+  const jsobject = new JSObject();
+  const AbstractFunctionType = class AbstractFunctionType extends TypeRep {
+    constructor() {
+      super();
+      this._stringValue = null;
+    }
+    toString() {
+      return this.name;
+    }
+    get name() {
+      if (this._stringValue) return this._stringValue;
+      let buffer = '(';
+      for (let i = 0; i < this.args.length; ++i) {
+        if (i > 0) {
+          buffer += ', ';
+        }
+        buffer += typeName(this.args[i]);
+      }
+      if (this.optionals.length > 0) {
+        if (this.args.length > 0) buffer += ', ';
+        buffer += '[';
+        for (let i = 0; i < this.optionals.length; ++i) {
+          if (i > 0) {
+            buffer += ', ';
+          }
+          buffer += typeName(this.optionals[i]);
+        }
+        buffer += ']';
+      } else if (Object.keys(this.named).length > 0) {
+        if (this.args.length > 0) buffer += ', ';
+        buffer += '{';
+        let names = getOwnPropertyNames(this.named).sort();
+        for (let i = 0; i < names.length; ++i) {
+          if (i > 0) {
+            buffer += ', ';
+          }
+          buffer += names[i] + ': ' + typeName(this.named[names[i]]);
+        }
+        buffer += '}';
+      }
+      buffer += ') -> ' + typeName(this.returnType);
+      this._stringValue = buffer;
+      return buffer;
+    }
+  };
+  const FunctionType = class FunctionType extends AbstractFunctionType {
+    constructor(definite, returnType, args, optionals, named) {
+      super();
+      this.definite = definite;
+      this.returnType = returnType;
+      this.args = args;
+      this.optionals = optionals;
+      this.named = named;
+      this.metadata = [];
+      function process(array, metadata) {
+        var result = [];
+        for (var i = 0; i < array.length; ++i) {
+          var arg = array[i];
+          if (arg instanceof Array) {
+            metadata.push(arg.slice(1));
+            result.push(arg[0]);
+          } else {
+            metadata.push([]);
+            result.push(arg);
+          }
+        }
+        return result;
+      }
+      this.args = process(this.args, this.metadata);
+      this.optionals = process(this.optionals, this.metadata);
+      this._canonize();
+    }
+    _canonize() {
+      if (this.definite) return;
+      function replace(a) {
+        return a == dynamic ? bottom : a;
+      }
+      this.args = this.args.map(replace);
+      if (this.optionals.length > 0) {
+        this.optionals = this.optionals.map(replace);
+      }
+      if (Object.keys(this.named).length > 0) {
+        let r = {};
+        for (let name of getOwnPropertyNames(this.named)) {
+          r[name] = replace(this.named[name]);
+        }
+        this.named = r;
+      }
+    }
+  };
+  const Typedef = class Typedef extends AbstractFunctionType {
+    constructor(name, closure) {
+      super();
+      this._name = name;
+      this._closure = closure;
+      this._functionType = null;
+    }
+    get definite() {
+      return this._functionType.definite;
+    }
+    get name() {
+      return this._name;
+    }
+    get functionType() {
+      if (!this._functionType) {
+        this._functionType = this._closure();
+      }
+      return this._functionType;
+    }
+    get returnType() {
+      return this.functionType.returnType;
+    }
+    get args() {
+      return this.functionType.args;
+    }
+    get optionals() {
+      return this.functionType.optionals;
+    }
+    get named() {
+      return this.functionType.named;
+    }
+    get metadata() {
+      return this.functionType.metadata;
+    }
+  };
+  function _functionType(definite, returnType, args, extra) {
+    let optionals;
+    let named;
+    if (extra === void 0) {
+      optionals = [];
+      named = {};
+    } else if (extra instanceof Array) {
+      optionals = extra;
+      named = {};
+    } else {
+      optionals = [];
+      named = extra;
+    }
+    return new FunctionType(definite, returnType, args, optionals, named);
+  }
+  function functionType(returnType, args, extra) {
+    return _functionType(false, returnType, args, extra);
+  }
+  function definiteFunctionType(returnType, args, extra) {
+    return _functionType(true, returnType, args, extra);
+  }
+  function typedef(name, closure) {
+    return new Typedef(name, closure);
+  }
+  function isDartType(type) {
+    return read(type) === core.Type;
+  }
+  function typeName(type) {
+    if (type instanceof TypeRep) return type.toString();
+    let tag = read(type);
+    if (tag === core.Type) {
+      let name = type.name;
+      let args = getGenericArgs(type);
+      if (args) {
+        name += '<';
+        for (let i = 0; i < args.length; ++i) {
+          if (i > 0) name += ', ';
+          name += typeName(args[i]);
+        }
+        name += '>';
+      }
+      return name;
+    }
+    if (tag) return "Not a type: " + tag.name;
+    return "JSObject<" + type.name + ">";
+  }
+  function isFunctionType(type) {
+    return type instanceof AbstractFunctionType || type == core.Function;
+  }
+  function isFunctionSubType(ft1, ft2) {
+    if (ft2 == core.Function) {
+      return true;
+    }
+    let ret1 = ft1.returnType;
+    let ret2 = ft2.returnType;
+    if (!isSubtype_(ret1, ret2)) {
+      if (ret2 != void$) {
+        return false;
+      }
+    }
+    let args1 = ft1.args;
+    let args2 = ft2.args;
+    if (args1.length > args2.length) {
+      return false;
+    }
+    for (let i = 0; i < args1.length; ++i) {
+      if (!isSubtype_(args2[i], args1[i])) {
+        return false;
+      }
+    }
+    let optionals1 = ft1.optionals;
+    let optionals2 = ft2.optionals;
+    if (args1.length + optionals1.length < args2.length + optionals2.length) {
+      return false;
+    }
+    let j = 0;
+    for (let i = args1.length; i < args2.length; ++i, ++j) {
+      if (!isSubtype_(args2[i], optionals1[j])) {
+        return false;
+      }
+    }
+    for (let i = 0; i < optionals2.length; ++i, ++j) {
+      if (!isSubtype_(optionals2[i], optionals1[j])) {
+        return false;
+      }
+    }
+    let named1 = ft1.named;
+    let named2 = ft2.named;
+    let names = getOwnPropertyNames(named2);
+    for (let i = 0; i < names.length; ++i) {
+      let name = names[i];
+      let n1 = named1[name];
+      let n2 = named2[name];
+      if (n1 === void 0) {
+        return false;
+      }
+      if (!isSubtype_(n2, n1)) {
+        return false;
+      }
+    }
+    return true;
+  }
+  function canonicalType(t) {
+    if (t === Object) return core.Object;
+    if (t === Function) return core.Function;
+    if (t === Array) return core.List;
+    if (t === String) return core.String;
+    if (t === Number) return core.double;
+    if (t === Boolean) return core.bool;
+    return t;
+  }
+  const subtypeMap = new Map();
+  function isSubtype(t1, t2) {
+    let map = subtypeMap.get(t1);
+    let result;
+    if (map) {
+      result = map.get(t2);
+      if (result !== void 0) return result;
+    } else {
+      subtypeMap.set(t1, map = new Map());
+    }
+    result = isSubtype_(t1, t2);
+    map.set(t2, result);
+    return result;
+  }
+  function _isBottom(type) {
+    return type == bottom;
+  }
+  function _isTop(type) {
+    return type == core.Object || type == dynamic;
+  }
+  function isSubtype_(t1, t2) {
+    t1 = canonicalType(t1);
+    t2 = canonicalType(t2);
+    if (t1 == t2) return true;
+    if (_isTop(t2) || _isBottom(t1)) {
+      return true;
+    }
+    if (_isTop(t1) || _isBottom(t2)) {
+      return false;
+    }
+    if (isClassSubType(t1, t2)) {
+      return true;
+    }
+    if (isFunctionType(t1) && isFunctionType(t2)) {
+      return isFunctionSubType(t1, t2);
+    }
+    return false;
+  }
+  function isClassSubType(t1, t2) {
+    t1 = canonicalType(t1);
+    assert(t2 == canonicalType(t2));
+    if (t1 == t2) return true;
+    if (t1 == core.Object) return false;
+    if (t1 == null) return t2 == core.Object || t2 == dynamic;
+    let raw1 = getGenericClass(t1);
+    let raw2 = getGenericClass(t2);
+    if (raw1 != null && raw1 == raw2) {
+      let typeArguments1 = getGenericArgs(t1);
+      let typeArguments2 = getGenericArgs(t2);
+      let length = typeArguments1.length;
+      if (typeArguments2.length == 0) {
+        return true;
+      } else if (length == 0) {
+        return false;
+      }
+      assert(length == typeArguments2.length);
+      for (let i = 0; i < length; ++i) {
+        if (!isSubtype(typeArguments1[i], typeArguments2[i])) {
+          return false;
+        }
+      }
+      return true;
+    }
+    if (isClassSubType(t1.__proto__, t2)) return true;
+    let mixins = getMixins(t1);
+    if (mixins) {
+      for (let m1 of mixins) {
+        if (m1 != null && isClassSubType(m1, t2)) return true;
+      }
+    }
+    let getInterfaces = getImplements(t1);
+    if (getInterfaces) {
+      for (let i1 of getInterfaces()) {
+        if (i1 != null && isClassSubType(i1, t2)) return true;
+      }
+    }
+    return false;
+  }
+  function isGroundType(type) {
+    if (type instanceof AbstractFunctionType) {
+      if (!_isTop(type.returnType)) return false;
+      for (let i = 0; i < type.args.length; ++i) {
+        if (!_isBottom(type.args[i])) return false;
+      }
+      for (let i = 0; i < type.optionals.length; ++i) {
+        if (!_isBottom(type.optionals[i])) return false;
+      }
+      let names = getOwnPropertyNames(type.named);
+      for (let i = 0; i < names.length; ++i) {
+        if (!_isBottom(type.named[names[i]])) return false;
+      }
+      return true;
+    }
+    let typeArgs = getGenericArgs(type);
+    if (!typeArgs) return true;
+    for (let t of typeArgs) {
+      if (t != core.Object && t != dynamic) return false;
+    }
+    return true;
+  }
+  const defineProperty = Object.defineProperty;
+  const getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+  const getOwnPropertyNames = Object.getOwnPropertyNames;
+  const getOwnPropertySymbols = Object.getOwnPropertySymbols;
+  const hasOwnProperty = Object.prototype.hasOwnProperty;
+  const StrongModeError = (function() {
+    function StrongModeError(message) {
+      Error.call(this);
+      this.message = message;
+    }
+    ;
+    Object.setPrototypeOf(StrongModeError.prototype, Error.prototype);
+    return StrongModeError;
+  })();
+  function throwStrongModeError(message) {
+    throw new StrongModeError(message);
+  }
+  function throwInternalError(message) {
+    throw Error(message);
+  }
+  function getOwnNamesAndSymbols(obj) {
+    return getOwnPropertyNames(obj).concat(getOwnPropertySymbols(obj));
+  }
+  function safeGetOwnProperty(obj, name) {
+    let desc = getOwnPropertyDescriptor(obj, name);
+    if (desc) return desc.value;
+  }
+  function defineLazyProperty(to, name, desc) {
+    let init = desc.get;
+    let value = null;
+    function lazySetter(x) {
+      init = null;
+      value = x;
+    }
+    function circularInitError() {
+      throwInternalError('circular initialization for field ' + name);
+    }
+    function lazyGetter() {
+      if (init == null) return value;
+      let f = init;
+      init = circularInitError;
+      lazySetter(f());
+      return value;
+    }
+    desc.get = lazyGetter;
+    desc.configurable = true;
+    if (desc.set) desc.set = lazySetter;
+    return defineProperty(to, name, desc);
+  }
+  function defineLazy(to, from) {
+    for (let name of getOwnNamesAndSymbols(from)) {
+      defineLazyProperty(to, name, getOwnPropertyDescriptor(from, name));
+    }
+  }
+  function defineMemoizedGetter(obj, name, getter) {
+    return defineLazyProperty(obj, name, {get: getter});
+  }
+  function copyTheseProperties(to, from, names) {
     for (let name of names) {
-      exports[name] = _export(value[name]);
-    }
-  }
-
-  exports.global = typeof window == "undefined" ? global : window;
-  exports.JsSymbol = _export(Symbol);
-
-  // TODO(vsm): This is referenced (as init.globalState) from
-  // isolate_helper.dart.  Where should it go?
-  // See: https://github.com/dart-lang/dev_compiler/issues/164
-  exports.globalState = null;
-  _js_helper.checkNum = operations.notNull;
-
-  // Re-exports
-
-  // From classes
-  exportFrom(classes, [
-    'bind',
-    'classGetConstructorType',
-    'dartx',
-    'defineNamedConstructor',
-    'defineExtensionNames',
-    'defineExtensionMembers',
-    'generic',
-    'implements',
-    'list',
-    'metadata',
-    'mixin',
-    'registerExtension',
-    'setBaseClass',
-    'setSignature',
-    'virtualField'
-  ]);
-
-  exportFrom(generators, [
-    'syncStar',
-    'async',
-    'asyncStar'
-  ]);
-
-  // From dart_utils
-  exportFrom(dart_utils, ['copyProperties', 'export_']);
-  // Renames
-  exports.defineLazyClass = _export(dart_utils.defineLazy);
-  exports.defineLazyProperties = _export(dart_utils.defineLazy);
-  exports.defineLazyClassGeneric = _export(dart_utils.defineLazyProperty);
-
-  // From operations
-  exportFrom(operations, [
-    'JsIterator',
-    'arity',
-    'asInt',
-    'assert',
-    'const',
-    'dcall',
-    'dindex',
-    'dload',
-    'dput',
-    'dsend',
-    'dsetindex',
-    'equals',
-    'hashCode',
-    'map',
-    'noSuchMethod',
-    'notNull',
-    'nullSafe',
-    'stackPrint',
-    'stackTrace',
-    'strongInstanceOf',
-    'throw',
-    'toString',
-  ])
-  // Renames
-  exports.as = _export(operations.cast);
-  exports.is = _export(operations.instanceOf);
-
-  // From types
-  exportFrom(types, [
-    'bottom',
-    'definiteFunctionType',
-    'dynamic',
-    'functionType',
-    'jsobject',
-    'typedef',
-    'typeName',
-    'void',
-  ]);
-
-  // From rtti
-  exportFrom(rtti, [
-    'fn',
-    'realRuntimeType',
-    'runtimeType',
-  ]);
-
+      var desc = getOwnPropertyDescriptor(from, name);
+      if (desc != void 0) {
+        defineProperty(to, name, desc);
+      } else {
+        defineLazyProperty(to, name, () => from[name]);
+      }
+    }
+    return to;
+  }
+  function copyProperties(to, from) {
+    return copyTheseProperties(to, from, getOwnNamesAndSymbols(from));
+  }
+  function export$(to, from, show, hide) {
+    if (show == void 0 || show.length == 0) {
+      show = getOwnNamesAndSymbols(from);
+    }
+    if (hide != void 0) {
+      var hideMap = new Set(hide);
+      show = show.filter(k => !hideMap.has(k));
+    }
+    return copyTheseProperties(to, from, show);
+  }
+  const defineLazyClass = defineLazy;
+  const defineLazyProperties = defineLazy;
+  const defineLazyClassGeneric = defineLazyProperty;
+  const as = cast;
+  const is = instanceOf;
+  const global = typeof window == "undefined" ? global : window;
+  const JsSymbol = Symbol;
+  // Exports:
+  exports.mixin = mixin;
+  exports.getMixins = getMixins;
+  exports.getImplements = getImplements;
+  exports.generic = generic;
+  exports.getGenericClass = getGenericClass;
+  exports.getGenericArgs = getGenericArgs;
+  exports.getMethodType = getMethodType;
+  exports.classGetConstructorType = classGetConstructorType;
+  exports.bind = bind;
+  exports.setSignature = setSignature;
+  exports.hasMethod = hasMethod;
+  exports.virtualField = virtualField;
+  exports.defineNamedConstructor = defineNamedConstructor;
+  exports.dartx = dartx;
+  exports.getExtensionSymbol = getExtensionSymbol;
+  exports.defineExtensionNames = defineExtensionNames;
+  exports.registerExtension = registerExtension;
+  exports.defineExtensionMembers = defineExtensionMembers;
+  exports.canonicalMember = canonicalMember;
+  exports.setType = setType;
+  exports.list = list;
+  exports.setBaseClass = setBaseClass;
+  exports.throwCastError = throwCastError;
+  exports.throwAssertionError = throwAssertionError;
+  exports.throwNullValueError = throwNullValueError;
+  exports.syncStar = syncStar;
+  exports.async = async;
+  exports.asyncStar = asyncStar;
+  exports.dload = dload;
+  exports.dput = dput;
+  exports.checkApply = checkApply;
+  exports.throwNoSuchMethod = throwNoSuchMethod;
+  exports.throwNoSuchMethodFunc = throwNoSuchMethodFunc;
+  exports.checkAndCall = checkAndCall;
+  exports.dcall = dcall;
+  exports.callMethod = callMethod;
+  exports.dsend = dsend;
+  exports.dindex = dindex;
+  exports.dsetindex = dsetindex;
+  exports.strongInstanceOf = strongInstanceOf;
+  exports.instanceOfOrNull = instanceOfOrNull;
+  exports.instanceOf = instanceOf;
+  exports.cast = cast;
+  exports.asInt = asInt;
+  exports.arity = arity;
+  exports.equals = equals;
+  exports.notNull = notNull;
+  exports.map = map;
+  exports.assert = assert;
+  exports.throw = throw$;
+  exports.getError = getError;
+  exports.stackPrint = stackPrint;
+  exports.stackTrace = stackTrace;
+  exports.nullSafe = nullSafe;
+  exports.multiKeyPutIfAbsent = multiKeyPutIfAbsent;
+  exports.constants = constants;
+  exports.const = const$;
+  exports.hashCode = hashCode;
+  exports.toString = toString;
+  exports.noSuchMethod = noSuchMethod;
+  exports.JsIterator = JsIterator;
+  exports.fn = fn;
+  exports.checkPrimitiveType = checkPrimitiveType;
+  exports.runtimeType = runtimeType;
+  exports.getFunctionType = getFunctionType;
+  exports.realRuntimeType = realRuntimeType;
+  exports.LazyTagged = LazyTagged;
+  exports.read = read;
+  exports.tag = tag;
+  exports.tagComputed = tagComputed;
+  exports.tagMemoized = tagMemoized;
+  exports.implements = implements$;
+  exports.metadata = metadata;
+  exports.TypeRep = TypeRep;
+  exports.Dynamic = Dynamic;
+  exports.dynamic = dynamic;
+  exports.Void = Void;
+  exports.void = void$;
+  exports.Bottom = Bottom;
+  exports.bottom = bottom;
+  exports.JSObject = JSObject;
+  exports.jsobject = jsobject;
+  exports.AbstractFunctionType = AbstractFunctionType;
+  exports.FunctionType = FunctionType;
+  exports.Typedef = Typedef;
+  exports.functionType = functionType;
+  exports.definiteFunctionType = definiteFunctionType;
+  exports.typedef = typedef;
+  exports.isDartType = isDartType;
+  exports.typeName = typeName;
+  exports.isFunctionType = isFunctionType;
+  exports.isFunctionSubType = isFunctionSubType;
+  exports.canonicalType = canonicalType;
+  exports.subtypeMap = subtypeMap;
+  exports.isSubtype = isSubtype;
+  exports.isSubtype_ = isSubtype_;
+  exports.isClassSubType = isClassSubType;
+  exports.isGroundType = isGroundType;
+  exports.defineProperty = defineProperty;
+  exports.getOwnPropertyDescriptor = getOwnPropertyDescriptor;
+  exports.getOwnPropertyNames = getOwnPropertyNames;
+  exports.getOwnPropertySymbols = getOwnPropertySymbols;
+  exports.hasOwnProperty = hasOwnProperty;
+  exports.StrongModeError = StrongModeError;
+  exports.throwStrongModeError = throwStrongModeError;
+  exports.throwInternalError = throwInternalError;
+  exports.getOwnNamesAndSymbols = getOwnNamesAndSymbols;
+  exports.safeGetOwnProperty = safeGetOwnProperty;
+  exports.defineLazyProperty = defineLazyProperty;
+  exports.defineLazy = defineLazy;
+  exports.defineMemoizedGetter = defineMemoizedGetter;
+  exports.copyTheseProperties = copyTheseProperties;
+  exports.copyProperties = copyProperties;
+  exports.export = export$;
+  exports.defineLazyClass = defineLazyClass;
+  exports.defineLazyProperties = defineLazyProperties;
+  exports.defineLazyClassGeneric = defineLazyClassGeneric;
+  exports.as = as;
+  exports.is = is;
+  exports.global = global;
+  exports.JsSymbol = JsSymbol;
 });