Implement Evaluate without creating new classes.

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include <limits>
 #include "include/dart_api.h"
 #include "platform/assert.h"
@@ skipping 1966 matching lines @@
                           intptr_t token_pos);
 
   // Allocates a new Function object representing a closure function, as well as
   // a new associated Class object representing the signature class of the
   // function.
   // The function and the class share the same given name.
   static RawFunction* NewClosureFunction(const String& name,
                                          const Function& parent,
                                          intptr_t token_pos);
 
+  static RawFunction* NewEvalFunction(const Class& owner,
+                                      const Script& script,
+                                      bool is_static);
+
   // Creates a new static initializer function which is invoked in the implicit
   // static getter function.
   static RawFunction* NewStaticInitializer(const Field& field);
 
   // Allocate new function object, clone values from this function. The
   // owner of the clone is new_owner.
   RawFunction* Clone(const Class& new_owner) const;
 
   // Slow function, use in asserts to track changes in important library
   // functions.
@@ skipping 54 matching lines @@
   void set_kind(RawFunction::Kind value) const;
   void set_is_static(bool value) const;
   void set_is_const(bool value) const;
   void set_is_external(bool value) const;
   void set_parent_function(const Function& value) const;
   void set_owner(const Object& value) const;
   RawFunction* implicit_closure_function() const;
   void set_implicit_closure_function(const Function& value) const;
   RawInstance* implicit_static_closure() const;
   void set_implicit_static_closure(const Instance& closure) const;
+  RawScript* eval_script() const;
+  void set_eval_script(const Script& value) const;
   void set_num_optional_parameters(intptr_t value) const;  // Encoded value.
   void set_kind_tag(intptr_t value) const;
   void set_data(const Object& value) const;
   bool is_optimizable() const {
     return OptimizableBit::decode(raw_ptr()->kind_tag_);
   }
   void set_is_optimizable(bool value) const;
 
   static RawFunction* New();
 
@@ skipping 5099 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_