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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_LITERAL_OBJECTS_H_
#define V8_OBJECTS_LITERAL_OBJECTS_H_
#include "src/objects.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
class ClassLiteral;
// BoilerplateDescription is a list of properties consisting of name value
// pairs. In addition to the properties, it provides the projected number
// of properties in the backing store. This number includes properties with
// computed names that are not
// in the list.
class BoilerplateDescription : public FixedArray {
public:
Object* name(int index) const;
Object* value(int index) const;
// The number of boilerplate properties.
int size() const;
// Number of boilerplate properties and properties with computed names.
int backing_store_size() const;
void set_backing_store_size(Isolate* isolate, int backing_store_size);
DECL_CAST(BoilerplateDescription)
private:
bool has_number_of_properties() const;
};
// Pair of {ElementsKind} and an array of constant values for {ArrayLiteral}
// expressions. Used to communicate with the runtime for literal boilerplate
// creation within the {Runtime_CreateArrayLiteral} method.
class ConstantElementsPair : public Tuple2 {
public:
DECL_INT_ACCESSORS(elements_kind)
DECL_ACCESSORS(constant_values, FixedArrayBase)
inline bool is_empty() const;
DECL_CAST(ConstantElementsPair)
static const int kElementsKindOffset = kValue1Offset;
static const int kConstantValuesOffset = kValue2Offset;
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(ConstantElementsPair);
};
class ClassBoilerplate : public FixedArray {
public:
enum ValueKind { kData, kGetter, kSetter };
struct Flags {
#define FLAGS_BIT_FIELDS(V, _) \
V(InstallClassNameAccessorBit, bool, 1, _) \
V(ArgumentsCountBits, int, 30, _)
DEFINE_BIT_FIELDS(FLAGS_BIT_FIELDS)
#undef FLAGS_BIT_FIELDS
};
struct ComputedEntryFlags {
#define COMPUTED_ENTRY_BIT_FIELDS(V, _) \
V(ValueKindBits, ValueKind, 2, _) \
V(KeyIndexBits, unsigned, 29, _)
DEFINE_BIT_FIELDS(COMPUTED_ENTRY_BIT_FIELDS)
#undef COMPUTED_ENTRY_BIT_FIELDS
};
enum DefineClassArgumentsIndices {
kConstructorArgumentIndex = 1,
kPrototypeArgumentIndex = 2,
// The index of a first dynamic argument passed to Runtime::kDefineClass
// function. The dynamic arguments are consist of method closures and
// computed property names.
kFirstDynamicArgumentIndex = 3,
};
static const int kMinimumClassPropertiesCount = 6;
static const int kMinimumPrototypePropertiesCount = 1;
DECL_CAST(ClassBoilerplate)
DECL_BOOLEAN_ACCESSORS(install_class_name_accessor)
DECL_INT_ACCESSORS(arguments_count)
DECL_ACCESSORS(static_properties_template, Object)
DECL_ACCESSORS(static_elements_template, Object)
DECL_ACCESSORS(static_computed_properties, FixedArray)
DECL_ACCESSORS(instance_properties_template, Object)
DECL_ACCESSORS(instance_elements_template, Object)
DECL_ACCESSORS(instance_computed_properties, FixedArray)
static void AddToPropertiesTemplate(Isolate* isolate,
Handle<NameDictionary> dictionary,
Handle<Name> name, int key_index,
ValueKind value_kind, Object* value);
static void AddToElementsTemplate(Isolate* isolate,
Handle<NumberDictionary> dictionary,
uint32_t key, int key_index,
ValueKind value_kind, Object* value);
static Handle<ClassBoilerplate> BuildClassBoilerplate(Isolate* isolate,
ClassLiteral* expr);
enum {
kFlagsIndex,
kClassPropertiesTemplateIndex,
kClassElementsTemplateIndex,
kClassComputedPropertiesIndex,
kPrototypePropertiesTemplateIndex,
kPrototypeElementsTemplateIndex,
kPrototypeComputedPropertiesIndex,
kBoileplateLength // last element
};
static const int kFullComputedEntrySize = 2;
private:
DECL_INT_ACCESSORS(flags)
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_LITERAL_OBJECTS_H_
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