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 1666 matching lines @@
   bool IsImplicitConstructor() const;
   bool IsFactory() const {
     return (kind() == RawFunction::kConstructor) && is_static();
   }
   bool IsDynamicFunction() const {
     if (is_static() || is_abstract()) {
       return false;
     }
     switch (kind()) {
       case RawFunction::kRegularFunction:
+      case RawFunction::kEvalFunction:
       case RawFunction::kGetterFunction:
       case RawFunction::kSetterFunction:
       case RawFunction::kImplicitGetter:
       case RawFunction::kImplicitSetter:
       case RawFunction::kMethodExtractor:
       case RawFunction::kNoSuchMethodDispatcher:
       case RawFunction::kInvokeFieldDispatcher:
         return true;
       case RawFunction::kClosureFunction:
       case RawFunction::kConstructor:
       case RawFunction::kImplicitStaticFinalGetter:
       case RawFunction::kStaticInitializer:
         return false;
       default:
         UNREACHABLE();
         return false;
     }
   }
   bool IsStaticFunction() const {
     if (!is_static()) {
       return false;
     }
     switch (kind()) {
       case RawFunction::kRegularFunction:
+      case RawFunction::kEvalFunction:
       case RawFunction::kGetterFunction:
       case RawFunction::kSetterFunction:
       case RawFunction::kImplicitGetter:
       case RawFunction::kImplicitSetter:
       case RawFunction::kImplicitStaticFinalGetter:
       case RawFunction::kStaticInitializer:
         return true;
       case RawFunction::kClosureFunction:
       case RawFunction::kConstructor:
         return false;
@@ skipping 234 matching lines @@
   // Returns true if this function represents a local function.
   bool IsLocalFunction() const {
     return parent_function() != Function::null();
   }
 
   // Returns true if this function represents a signature function without code.
   bool IsSignatureFunction() const {
     return kind() == RawFunction::kSignatureFunction;
   }
 
+  bool IsEvalFunction() const {
+    return kind() == RawFunction::kEvalFunction;
+  }
+
   static intptr_t InstanceSize() {
     return RoundedAllocationSize(sizeof(RawFunction));
   }
 
   static RawFunction* New(const String& name,
                           RawFunction::Kind kind,
                           bool is_static,
                           bool is_const,
                           bool is_abstract,
                           bool is_external,
                           bool is_native,
                           const Object& owner,
                           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 5077 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_