First stab at mixins in VM compiler

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 415 matching lines @@
   RawString* name_;
   RawArray* functions_;
   RawArray* fields_;
   RawGrowableObjectArray* closure_functions_;  // Local functions and literals.
   RawArray* interfaces_;  // Array of AbstractType.
   RawGrowableObjectArray* direct_subclasses_;  // Array of Class.
   RawScript* script_;
   RawLibrary* library_;
   RawTypeArguments* type_parameters_;  // Array of TypeParameter.
   RawType* super_type_;
+  RawType* mixin_;
   RawFunction* signature_function_;  // Associated function for signature class.
   RawArray* constants_;  // Canonicalized values of this class.
   RawArray* canonical_types_;  // Canonicalized types of this class.
   RawCode* allocation_stub_;  // Stub code for allocation of instances.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->allocation_stub_);
   }
 
   cpp_vtable handle_vtable_;
   intptr_t instance_size_in_words_;  // Size if fixed len or 0 if variable len.
@@ skipping 102 matching lines @@
     kConstImplicitGetter,  // represents an implicit const getter for fields.
     kMethodExtractor,  // converts method into implicit closure on the receiver.
   };
 
  private:
   friend class Class;
   RAW_HEAP_OBJECT_IMPLEMENTATION(Function);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
-  RawObject* owner_;  // Class or  patch class where this function was defined.
+  RawObject* owner_;  // Class or patch class or mixin class
+                      // where this function is defined.
   RawAbstractType* result_type_;
   RawArray* parameter_types_;
   RawArray* parameter_names_;
   RawCode* code_;  // Compiled code for the function.
   RawCode* unoptimized_code_;  // Unoptimized code, keep it after optimization.
   RawObject* data_;  // Additional data specific to the function kind.
   RawObject** to() {
     return reinterpret_cast<RawObject**>(&ptr()->data_);
   }
 
@@ skipping 43 matching lines @@
     return reinterpret_cast<RawObject**>(&ptr()->target_);
   }
 };
 
 
 class RawField : public RawObject {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Field);
 
   RawObject** from() { return reinterpret_cast<RawObject**>(&ptr()->name_); }
   RawString* name_;
-  RawClass* owner_;
+  RawObject* owner_;  // Class or patch class or mixin class
+                      // where this field is defined.
   RawAbstractType* type_;
   RawInstance* value_;  // Offset in words for instance and value for static.
   RawObject** to() { return reinterpret_cast<RawObject**>(&ptr()->value_); }
 
   intptr_t token_pos_;
   uint8_t kind_bits_;  // static, final, const, has initializer.
 };
 
 
 class RawLiteralToken : public RawObject {
@@ skipping 1056 matching lines @@
          kExternalUint64ArrayCid == kExternalInt8ArrayCid + 8 &&
          kExternalFloat32ArrayCid == kExternalInt8ArrayCid + 9 &&
          kExternalFloat64ArrayCid == kExternalInt8ArrayCid + 10 &&
          kStacktraceCid == kExternalInt8ArrayCid + 11);
   return (index >= kExternalInt8ArrayCid && index <= kExternalFloat64ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_