Support initialized mixin fields across scripts

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/bigint_operations.h"
@@ skipping 5331 matching lines @@
   return result.raw();
 }
 
 
 const char* TokenStream::ToCString() const {
   return "TokenStream";
 }
 
 
 TokenStream::Iterator::Iterator(const TokenStream& tokens, intptr_t token_pos)
-    : tokens_(tokens),
+    : tokens_(TokenStream::Handle(tokens.raw())),
       data_(ExternalUint8Array::Handle(tokens.GetStream())),
       stream_(data_.ByteAddr(0), data_.Length()),
       token_objects_(Array::Handle(tokens.TokenObjects())),
       obj_(Object::Handle()),
       cur_token_pos_(token_pos),
       cur_token_kind_(Token::kILLEGAL),
       cur_token_obj_index_(-1) {
   SetCurrentPosition(token_pos);
 }
 
 
+void TokenStream::Iterator::SetStream(const TokenStream& tokens,
+                                      intptr_t token_pos) {
+  tokens_ = tokens.raw();
+  data_ = tokens.GetStream();
+  stream_.SetStream(data_.ByteAddr(0), data_.Length());
+  token_objects_ = tokens.TokenObjects();
+  obj_ = Object::null();
+  cur_token_pos_ = token_pos;
+  cur_token_kind_ = Token::kILLEGAL;
+  cur_token_obj_index_ = -1;
+  SetCurrentPosition(token_pos);
+}
+
+
 bool TokenStream::Iterator::IsValid() const {
   return !tokens_.IsNull();
 }
 
 
 Token::Kind TokenStream::Iterator::LookaheadTokenKind(intptr_t num_tokens) {
   intptr_t saved_position = stream_.Position();
   Token::Kind kind = Token::kILLEGAL;
   intptr_t value = -1;
   intptr_t count = 0;
@@ skipping 8244 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart