Inference through conditional expressions

lib/runtime/dart/core.js

 var core;
 (function(exports) {
   'use strict';
   class Object {
     constructor() {
       let name = this.constructor.name;
       let init = this[name];
       let result = void 0;
       if (init)
         result = init.apply(this, arguments);
@@ skipping 714 matching lines @@
   dart.defineNamedConstructor(RangeError, 'index');
   class IndexError extends ArgumentError {
     IndexError(invalidValue, indexable, name, message, length) {
       if (name === void 0)
         name = null;
       if (message === void 0)
         message = null;
       if (length === void 0)
         length = null;
       this.indexable = indexable;
-      this.length = dart.as(length != null ? length : dart.dload(indexable, 'length'), int);
+      this.length = length != null ? length : dart.as(dart.dload(indexable, 'length'), int);
       super.value(invalidValue, name, message != null ? message : "Index out of range");
     }
     get start() {
       return 0;
     }
     get end() {
       return dart.notNull(this.length) - 1;
     }
     toString() {
       dart.assert(this[_hasValue]);
@@ skipping 277 matching lines @@
       Expando(name) {
         if (name === void 0)
           name = null;
         this.name = name;
       }
       toString() {
         return `Expando:${this.name}`;
       }
       get(object) {
         let values = _js_helper.Primitives.getProperty(object, Expando._EXPANDO_PROPERTY_NAME);
-        return dart.as(values == null ? null : _js_helper.Primitives.getProperty(values, this[_getKey]()), T);
+        return values == null ? null : dart.as(_js_helper.Primitives.getProperty(values, this[_getKey]()), T);
       }
       set(object, value) {
         dart.as(value, T);
         let values = _js_helper.Primitives.getProperty(object, Expando._EXPANDO_PROPERTY_NAME);
         if (values == null) {
           values = new Object();
           _js_helper.Primitives.setProperty(object, Expando._EXPANDO_PROPERTY_NAME, values);
         }
         _js_helper.Primitives.setProperty(values, this[_getKey](), value);
       }
@@ skipping 1302 matching lines @@
             break;
           }
         }
         host = authority.substring(hostStart, hostEnd);
       }
       return new Uri({scheme: scheme, userInfo: userInfo, host: dart.as(host, String), port: dart.as(port, int), pathSegments: unencodedPath.split("/"), queryParameters: queryParameters});
     }
     file(path, opts) {
       let windows = opts && 'windows' in opts ? opts.windows : null;
       windows = windows == null ? Uri._isWindows : windows;
-      return dart.as(windows ? Uri._makeWindowsFileUrl(path) : Uri._makeFileUri(path), Uri);
+      return windows ? dart.as(Uri._makeWindowsFileUrl(path), Uri) : dart.as(Uri._makeFileUri(path), Uri);
     }
     static get base() {
       let uri = _js_helper.Primitives.currentUri();
       if (uri != null)
         return Uri.parse(uri);
       throw new UnsupportedError("'Uri.base' is not supported");
     }
     static get _isWindows() {
       return false;
     }
@@ skipping 1114 matching lines @@
   exports.StackTrace = StackTrace;
   exports.Stopwatch = Stopwatch;
   exports.String = String;
   exports.RuneIterator = RuneIterator;
   exports.StringBuffer = StringBuffer;
   exports.StringSink = StringSink;
   exports.Symbol = Symbol;
   exports.Type = Type;
   exports.Uri = Uri;
 })(core || (core = {}));