Support initialized mixin fields across scripts

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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1903 matching lines @@
   static RawTokenStream* New(intptr_t length);
   static RawTokenStream* New(const Scanner::GrowableTokenStream& tokens,
                              const String& private_key);
 
   // The class Iterator encapsulates iteration over the tokens
   // in a TokenStream object.
   class Iterator : ValueObject {
    public:
     Iterator(const TokenStream& tokens, intptr_t token_pos);
 
+    void SetStream(const TokenStream& tokens, intptr_t token_pos);
     bool IsValid() const;
 
     inline Token::Kind CurrentTokenKind() const {
       return cur_token_kind_;
     }
 
     Token::Kind LookaheadTokenKind(intptr_t num_tokens);
 
     intptr_t CurrentPosition() const;
     void SetCurrentPosition(intptr_t value);
 
     void Advance();
 
     RawObject* CurrentToken() const;
     RawString* CurrentLiteral() const;
     RawString* MakeLiteralToken(const Object& obj) const;
 
    private:
     // Read token from the token stream (could be a simple token or an index
     // into the token objects array for IDENT or literal tokens).
     intptr_t ReadToken() {
       int64_t value = stream_.ReadUnsigned();
       ASSERT((value >= 0) && (value <= kIntptrMax));
       return static_cast<intptr_t>(value);
     }
 
-    const TokenStream& tokens_;
-    const ExternalUint8Array& data_;
+    TokenStream& tokens_;
+    ExternalUint8Array& data_;
     ReadStream stream_;
     Array& token_objects_;
     Object& obj_;
     intptr_t cur_token_pos_;
     Token::Kind cur_token_kind_;
     intptr_t cur_token_obj_index_;
   };
 
  private:
   void SetPrivateKey(const String& value) const;
@@ skipping 4967 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_