Inference through conditional expressions

lib/runtime/dart/async.js

 var async;
 (function(exports) {
   'use strict';
   // Function _invokeErrorHandler: (Function, Object, StackTrace) → dynamic
   function _invokeErrorHandler(errorHandler, error, stackTrace) {
     if (dart.is(errorHandler, ZoneBinaryCallback)) {
       return dart.dcall(errorHandler, error, stackTrace);
     } else {
       return dart.dcall(errorHandler, error);
     }
@@ skipping 3189 matching lines @@
       }
     }
     _StreamSinkWrapper[dart.implements] = () => [StreamSink$(T)];
     return _StreamSinkWrapper;
   });
   let _StreamSinkWrapper = _StreamSinkWrapper$();
   let _AddStreamState$ = dart.generic(function(T) {
     class _AddStreamState extends core.Object {
       _AddStreamState(controller, source, cancelOnError) {
         this.addStreamFuture = new _Future();
-        this.addSubscription = source.listen(controller[_add].bind(controller), {onError: dart.as(cancelOnError ? _AddStreamState.makeErrorHandler(controller) : controller[_addError].bind(controller), core.Function), onDone: controller[_close].bind(controller), cancelOnError: cancelOnError});
+        this.addSubscription = source.listen(controller[_add].bind(controller), {onError: cancelOnError ? dart.as(_AddStreamState.makeErrorHandler(controller), core.Function) : controller[_addError].bind(controller), onDone: controller[_close].bind(controller), cancelOnError: cancelOnError});
       }
       static makeErrorHandler(controller) {
         return (e, s) => {
           controller[_addError](e, s);
           controller[_close]();
         };
       }
       pause() {
         this.addSubscription.pause();
       }
@@ skipping 1363 matching lines @@
       let runBinary = opts && 'runBinary' in opts ? opts.runBinary : null;
       let registerCallback = opts && 'registerCallback' in opts ? opts.registerCallback : null;
       let registerUnaryCallback = opts && 'registerUnaryCallback' in opts ? opts.registerUnaryCallback : null;
       let registerBinaryCallback = opts && 'registerBinaryCallback' in opts ? opts.registerBinaryCallback : null;
       let errorCallback = opts && 'errorCallback' in opts ? opts.errorCallback : null;
       let scheduleMicrotask = opts && 'scheduleMicrotask' in opts ? opts.scheduleMicrotask : null;
       let createTimer = opts && 'createTimer' in opts ? opts.createTimer : null;
       let createPeriodicTimer = opts && 'createPeriodicTimer' in opts ? opts.createPeriodicTimer : null;
       let print = opts && 'print' in opts ? opts.print : null;
       let fork = opts && 'fork' in opts ? opts.fork : null;
-      return new ZoneSpecification({handleUncaughtError: dart.as(handleUncaughtError != null ? handleUncaughtError : other.handleUncaughtError, __CastType38), run: dart.as(run != null ? run : other.run, __CastType44), runUnary: dart.as(runUnary != null ? runUnary : other.runUnary, __CastType49), runBinary: dart.as(runBinary != null ? runBinary : other.runBinary, __CastType56), registerCallback: dart.as(registerCallback != null ? registerCallback : other.registerCallback, __CastType65), registerUnaryCallback: dart.as(registerUnaryCallback != null ? registerUnaryCallback : other.registerUnaryCallback, __CastType70), registerBinaryCallback: dart.as(registerBinaryCallback != null ? registerBinaryCallback : other.registerBinaryCallback, __CastType76), errorCallback: dart.as(errorCallback != null ? errorCallback : other.errorCallback, __CastType83), scheduleMicrotask: dart.as(scheduleMicrotask != null ? scheduleMicrotask : other.scheduleMicrotask, __CastType89), createTimer: dart.as(createTimer != null ? createTimer : other.createTimer, __CastType94), createPeriodicTimer: dart.as(createPeriodicTimer != null ? createPeriodicTimer : other.createPeriodicTimer, __CastType100), print: dart.as(print != null ? print : other.print, __CastType107), fork: dart.as(fork != null ? fork : other.fork, __CastType112)});
+      return new ZoneSpecification({handleUncaughtError: handleUncaughtError != null ? handleUncaughtError : other.handleUncaughtError, run: run != null ? run : other.run, runUnary: runUnary != null ? runUnary : other.runUnary, runBinary: runBinary != null ? runBinary : other.runBinary, registerCallback: registerCallback != null ? registerCallback : other.registerCallback, registerUnaryCallback: registerUnaryCallback != null ? registerUnaryCallback : other.registerUnaryCallback, registerBinaryCallback: registerBinaryCallback != null ? registerBinaryCallback : other.registerBinaryCallback, errorCallback: errorCallback != null ? errorCallback : other.errorCallback, scheduleMicrotask: scheduleMicrotask != null ? scheduleMicrotask : other.scheduleMicrotask, createTimer: createTimer != null ? createTimer : other.createTimer, createPeriodicTimer: createPeriodicTimer != null ? createPeriodicTimer : other.createPeriodicTimer, print: print != null ? print : other.print, fork: fork != null ? fork : other.fork});
     }
   }
   dart.defineNamedConstructor(ZoneSpecification, 'from');
   class _ZoneSpecification extends core.Object {
     _ZoneSpecification(opts) {
       let handleUncaughtError = opts && 'handleUncaughtError' in opts ? opts.handleUncaughtError : null;
       let run = opts && 'run' in opts ? opts.run : null;
       let runUnary = opts && 'runUnary' in opts ? opts.runUnary : null;
       let runBinary = opts && 'runBinary' in opts ? opts.runBinary : null;
       let registerCallback = opts && 'registerCallback' in opts ? opts.registerCallback : null;
@@ skipping 407 matching lines @@
   // Function _rootCreateTimer: (Zone, ZoneDelegate, Zone, Duration, () → void) → Timer
   function _rootCreateTimer(self, parent, zone, duration, callback) {
     if (!dart.notNull(core.identical(_ROOT_ZONE, zone))) {
       callback = zone.bindCallback(callback);
     }
     return Timer._createTimer(duration, callback);
   }
   // Function _rootCreatePeriodicTimer: (Zone, ZoneDelegate, Zone, Duration, (Timer) → void) → Timer
   function _rootCreatePeriodicTimer(self, parent, zone, duration, callback) {
     if (!dart.notNull(core.identical(_ROOT_ZONE, zone))) {
-      callback = dart.as(zone.bindUnaryCallback(callback), __CastType118);
+      callback = dart.as(zone.bindUnaryCallback(callback), __CastType38);
     }
     return Timer._createPeriodicTimer(duration, callback);
   }
   // Function _rootPrint: (Zone, ZoneDelegate, Zone, String) → void
   function _rootPrint(self, parent, zone, line) {
     _internal.printToConsole(line);
   }
   // Function _printToZone: (String) → void
   function _printToZone(line) {
     Zone.current.print(line);
@@ skipping 241 matching lines @@
     let zoneValues = opts && 'zoneValues' in opts ? opts.zoneValues : null;
     let zoneSpecification = opts && 'zoneSpecification' in opts ? opts.zoneSpecification : null;
     let onError = opts && 'onError' in opts ? opts.onError : null;
     let errorHandler = null;
     if (onError != null) {
       errorHandler = (self, parent, zone, error, stackTrace) => {
         try {
           if (dart.is(onError, ZoneBinaryCallback)) {
             return self.parent.runBinary(onError, error, stackTrace);
           }
-          return self.parent.runUnary(dart.as(onError, __CastType120), error);
+          return self.parent.runUnary(dart.as(onError, __CastType40), error);
         } catch (e) {
           let s = dart.stackTrace(e);
           if (core.identical(e, error)) {
             return parent.handleUncaughtError(zone, error, stackTrace);
           } else {
             return parent.handleUncaughtError(zone, e, s);
           }
         }
 
       };
     }
     if (zoneSpecification == null) {
       zoneSpecification = new ZoneSpecification({handleUncaughtError: errorHandler});
     } else if (errorHandler != null) {
       zoneSpecification = new ZoneSpecification.from(zoneSpecification, {handleUncaughtError: errorHandler});
     }
     let zone = Zone.current.fork({specification: zoneSpecification, zoneValues: zoneValues});
     if (onError != null) {
       return zone.runGuarded(body);
     } else {
       return zone.run(body);
     }
   }
-  let __CastType38 = dart.typedef('__CastType38', () => dart.functionType(dart.dynamic, [Zone, ZoneDelegate, Zone, dart.dynamic, core.StackTrace]));
-  let __CastType44 = dart.typedef('__CastType44', () => dart.functionType(dart.dynamic, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [])]));
-  let __CastType49 = dart.typedef('__CastType49', () => dart.functionType(dart.dynamic, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [dart.dynamic]), dart.dynamic]));
-  let __CastType56 = dart.typedef('__CastType56', () => dart.functionType(dart.dynamic, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [dart.dynamic, dart.dynamic]), dart.dynamic, dart.dynamic]));
-  let __CastType65 = dart.typedef('__CastType65', () => dart.functionType(ZoneCallback, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [])]));
-  let __CastType70 = dart.typedef('__CastType70', () => dart.functionType(ZoneUnaryCallback, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [dart.dynamic])]));
-  let __CastType76 = dart.typedef('__CastType76', () => dart.functionType(ZoneBinaryCallback, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [dart.dynamic, dart.dynamic])]));
-  let __CastType83 = dart.typedef('__CastType83', () => dart.functionType(AsyncError, [Zone, ZoneDelegate, Zone, core.Object, core.StackTrace]));
-  let __CastType89 = dart.typedef('__CastType89', () => dart.functionType(dart.void, [Zone, ZoneDelegate, Zone, dart.functionType(dart.dynamic, [])]));
-  let __CastType94 = dart.typedef('__CastType94', () => dart.functionType(Timer, [Zone, ZoneDelegate, Zone, core.Duration, dart.functionType(dart.void, [])]));
-  let __CastType100 = dart.typedef('__CastType100', () => dart.functionType(Timer, [Zone, ZoneDelegate, Zone, core.Duration, dart.functionType(dart.void, [Timer])]));
-  let __CastType107 = dart.typedef('__CastType107', () => dart.functionType(dart.void, [Zone, ZoneDelegate, Zone, core.String]));
-  let __CastType112 = dart.typedef('__CastType112', () => dart.functionType(Zone, [Zone, ZoneDelegate, Zone, ZoneSpecification, core.Map]));
-  let __CastType118 = dart.typedef('__CastType118', () => dart.functionType(dart.void, [Timer]));
-  let __CastType120 = dart.typedef('__CastType120', () => dart.functionType(dart.dynamic, [dart.dynamic]));
+  let __CastType38 = dart.typedef('__CastType38', () => dart.functionType(dart.void, [Timer]));
+  let __CastType40 = dart.typedef('__CastType40', () => dart.functionType(dart.dynamic, [dart.dynamic]));
   dart.copyProperties(exports, {
     get _hasDocument() {
       return typeof document == 'object';
     }
   });
   // Exports:
   exports.AsyncError = AsyncError;
   exports.Stream$ = Stream$;
   exports.Stream = Stream;
   exports.DeferredLibrary = DeferredLibrary;
@@ skipping 35 matching lines @@
   exports.ScheduleMicrotaskHandler = ScheduleMicrotaskHandler;
   exports.CreateTimerHandler = CreateTimerHandler;
   exports.CreatePeriodicTimerHandler = CreatePeriodicTimerHandler;
   exports.PrintHandler = PrintHandler;
   exports.ForkHandler = ForkHandler;
   exports.ZoneSpecification = ZoneSpecification;
   exports.ZoneDelegate = ZoneDelegate;
   exports.Zone = Zone;
   exports.runZoned = runZoned;
 })(async || (async = {}));