Implement modular compilation

tool/input_sdk/private/ddc_runtime/operations.dart

 // 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.
 
 /// This library defines runtime operations on objects used by the code
 /// generator.
 part of dart._runtime;
 
 _canonicalFieldName(obj, name, args, displayName) => JS('', '''(() => {
   $name = $canonicalMember($obj, $name);
@@ skipping 134 matching lines @@
 
 dsetindex(obj, index, value) => JS('', '''(() => {
   $callMethod($obj, 'set', [$index, $value], '[]=');
   return $value;
 })()''');
 
 _ignoreTypeFailure(actual, type) => JS('', '''(() => {
   // TODO(vsm): Remove this hack ...
   // This is primarily due to the lack of generic methods,
   // but we need to triage all the types.
-  if (isSubtype($type, $Iterable) && isSubtype($actual, $Iterable) ||
-      isSubtype($type, $Future) && isSubtype($actual, $Future) ||
-      isSubtype($type, $Map) && isSubtype($actual, $Map) ||
-      isSubtype($type, $Function) && isSubtype($actual, $Function) ||
-      isSubtype($type, $Stream) && isSubtype($actual, $Stream) ||
-      isSubtype($type, $StreamSubscription) &&
-          isSubtype($actual, $StreamSubscription)) {
+  if ($isSubtype($type, $Iterable) && $isSubtype($actual, $Iterable) ||
+      $isSubtype($type, $Future) && $isSubtype($actual, $Future) ||
+      $isSubtype($type, $Map) && $isSubtype($actual, $Map) ||
+      $isSubtype($type, $Function) && $isSubtype($actual, $Function) ||
+      $isSubtype($type, $Stream) && $isSubtype($actual, $Stream) ||
+      $isSubtype($type, $StreamSubscription) &&
+          $isSubtype($actual, $StreamSubscription)) {
     console.warn('Ignoring cast fail from ' + $typeName($actual) +
       ' to ' + $typeName($type));
     return true;
   }
   return false;
 })()''');
 
 strongInstanceOf(obj, type, ignoreFromWhiteList) => JS('', '''(() => {
   let actual = $realRuntimeType($obj);
   if ($isSubtype(actual, $type) || actual == $jsobject ||
       actual == $int && type == $double) return true;
   if ($ignoreFromWhiteList == void 0) return false;
   if ($isGroundType($type)) return false;
   if ($_ignoreTypeFailure(actual, $type)) return true;
   return false;
 })()''');
 
 instanceOfOrNull(obj, type) => JS('', '''(() => {
   if (($obj == null) || $strongInstanceOf($obj, $type, true)) return true;
   return false;
 })()''');
 
+@JSExportName('is')
 instanceOf(obj, type) => JS('', '''(() => {
   if ($strongInstanceOf($obj, $type)) return true;
   // TODO(#296): This is perhaps too eager to throw a StrongModeError?
   // It will throw on <int>[] is List<String>.
   // TODO(vsm): We can statically detect many cases where this
   // check is unnecessary.
   if ($isGroundType($type)) return false;
   let actual = $realRuntimeType($obj);
   $throwStrongModeError('Strong mode is check failure: ' +
     $typeName(actual) + ' does not soundly subtype ' +
     $typeName($type));
 })()''');
 
+@JSExportName('as')
 cast(obj, type) => JS('', '''(() => {
   // TODO(#296): This is perhaps too eager to throw a StrongModeError?
   // TODO(vsm): handle non-nullable types
   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 ' +
@@ skipping 218 matching lines @@
     constructor(dartIterator) {
       this.dartIterator = dartIterator;
     }
     next() {
       let i = this.dartIterator;
       let done = !i.moveNext();
       return { done: done, value: done ? void 0 : i.current };
     }
   }
 ''');