Evaluation of expression in context of library top-level

runtime/vm/object.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 7219 matching lines @@
   isolate->object_store()->set_root_library(Library::Handle());
 
   // Hook up predefined classes without setting their library pointers. These
   // classes are coming from the VM isolate, and are shared between multiple
   // isolates so setting their library pointers would be wrong.
   const Class& cls = Class::Handle(Object::dynamic_class());
   core_lib.AddObject(cls, String::Handle(cls.Name()));
 }
 
 
+RawObject* Library::Evaluate(const String& expr) const {
+  // Make a fake top-level class and evaluate the expression
+  // as a static function of the class.
+  Script& script = Script::Handle();
+  script = Script::New(Symbols::Empty(),
+                       Symbols::Empty(),
+                       RawScript::kSourceTag);
+  Class& temp_class =
+      Class::Handle(Class::New(Symbols::TopLevel(), script, 0));
+  temp_class.set_library(*this);
+  return temp_class.Evaluate(expr);
+}
+
+
 void Library::InitNativeWrappersLibrary(Isolate* isolate) {
   static const int kNumNativeWrappersClasses = 4;
   ASSERT(kNumNativeWrappersClasses > 0 && kNumNativeWrappersClasses < 10);
   const String& native_flds_lib_url = Symbols::DartNativeWrappers();
   const Library& native_flds_lib = Library::Handle(
       Library::NewLibraryHelper(native_flds_lib_url, false));
   native_flds_lib.Register();
   isolate->object_store()->set_native_wrappers_library(native_flds_lib);
   static const char* const kNativeWrappersClass = "NativeFieldWrapperClass";
   static const int kNameLength = 25;
@@ skipping 7597 matching lines @@
 }
 
 
 void MirrorReference::PrintToJSONStream(JSONStream* stream, bool ref) const {
   stream->OpenObject();
   stream->CloseObject();
 }
 
 
 }  // namespace dart