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      1 // Copyright 2017 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef V8_OBJECTS_LITERAL_OBJECTS_H_
      6 #define V8_OBJECTS_LITERAL_OBJECTS_H_
      7 
      8 #include "src/objects.h"
      9 
     10 // Has to be the last include (doesn't have include guards):
     11 #include "src/objects/object-macros.h"
     12 
     13 namespace v8 {
     14 namespace internal {
     15 
     16 // BoilerplateDescription is a list of properties consisting of name value
     17 // pairs. In addition to the properties, it provides the projected number
     18 // of properties in the backing store. This number includes properties with
     19 // computed names that are not
     20 // in the list.
     21 class BoilerplateDescription : public FixedArray {
     22  public:
     23   Object* name(int index) const;
     24   Object* value(int index) const;
     25 
     26   // The number of boilerplate properties.
     27   int size() const;
     28 
     29   // Number of boilerplate properties and properties with computed names.
     30   int backing_store_size() const;
     31 
     32   void set_backing_store_size(Isolate* isolate, int backing_store_size);
     33 
     34   DECLARE_CAST(BoilerplateDescription)
     35 
     36  private:
     37   bool has_number_of_properties() const;
     38 };
     39 
     40 // Pair of {ElementsKind} and an array of constant values for {ArrayLiteral}
     41 // expressions. Used to communicate with the runtime for literal boilerplate
     42 // creation within the {Runtime_CreateArrayLiteral} method.
     43 class ConstantElementsPair : public Struct {
     44  public:
     45   DECL_INT_ACCESSORS(elements_kind)
     46   DECL_ACCESSORS(constant_values, FixedArrayBase)
     47 
     48   DECLARE_CAST(ConstantElementsPair)
     49 
     50   // Dispatched behavior.
     51   DECLARE_PRINTER(ConstantElementsPair)
     52   DECLARE_VERIFIER(ConstantElementsPair)
     53 
     54   static const int kElementsKindOffset = HeapObject::kHeaderSize;
     55   static const int kConstantValuesOffset = kElementsKindOffset + kPointerSize;
     56   static const int kSize = kConstantValuesOffset + kPointerSize;
     57 
     58  private:
     59   DISALLOW_IMPLICIT_CONSTRUCTORS(ConstantElementsPair);
     60 };
     61 
     62 }  // namespace internal
     63 }  // namespace v8
     64 
     65 #include "src/objects/object-macros-undef.h"
     66 
     67 #endif  // V8_OBJECTS_LITERAL_OBJECTS_H_
     68