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| ****************************************************************************/ |
| #ifndef QV4PROPERTYDESCRIPTOR_H |
| #define QV4PROPERTYDESCRIPTOR_H |
| |
| // |
| // W A R N I N G |
| // ------------- |
| // |
| // This file is not part of the Qt API. It exists purely as an |
| // implementation detail. This header file may change from version to |
| // version without notice, or even be removed. |
| // |
| // We mean it. |
| // |
| |
| #include "qv4global_p.h" |
| #include "qv4value_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QV4 { |
| |
| struct FunctionObject; |
| |
| struct Property { |
| Value value; |
| Value set; |
| |
| // Section 8.10 |
| inline void fullyPopulated(PropertyAttributes *attrs) { |
| if (!attrs->hasType()) { |
| value = Value::undefinedValue(); |
| } |
| if (attrs->type() == PropertyAttributes::Accessor) { |
| attrs->clearWritable(); |
| if (value.isEmpty()) |
| value = Value::undefinedValue(); |
| if (set.isEmpty()) |
| set = Value::undefinedValue(); |
| } |
| attrs->resolve(); |
| } |
| |
| // ES8: 6.2.5.6 |
| void completed(PropertyAttributes *attrs) { |
| if (value.isEmpty()) |
| value = Encode::undefined(); |
| if (attrs->isGeneric() || attrs->isData()) { |
| attrs->setType(PropertyAttributes::Data); |
| if (!attrs->hasWritable()) |
| attrs->setWritable(false); |
| } else { |
| if (set.isEmpty()) |
| set = Encode::undefined(); |
| } |
| if (!attrs->hasEnumerable()) |
| attrs->setEnumerable(false); |
| if (!attrs->hasConfigurable()) |
| attrs->setConfigurable(false); |
| } |
| |
| inline bool isSubset(const PropertyAttributes &attrs, const Property *other, PropertyAttributes otherAttrs) const; |
| inline void merge(PropertyAttributes &attrs, const Property *other, PropertyAttributes otherAttrs); |
| |
| inline Heap::FunctionObject *getter() const { return reinterpret_cast<Heap::FunctionObject *>(value.heapObject()); } |
| inline Heap::FunctionObject *setter() const { return reinterpret_cast<Heap::FunctionObject *>(set.heapObject()); } |
| inline void setGetter(FunctionObject *g) { value = reinterpret_cast<Managed *>(g); } |
| inline void setSetter(FunctionObject *s) { set = (s ? reinterpret_cast<Managed *>(s) : nullptr); } |
| |
| void copy(const Property *other, PropertyAttributes attrs) { |
| value = other->value; |
| if (attrs.isAccessor()) |
| set = other->set; |
| } |
| |
| // ES8, section 9.1.6.2/9,.1.6.3 |
| bool isCompatible(PropertyAttributes &attrs, const Property *other, PropertyAttributes otherAttrs) const { |
| if (otherAttrs.isEmpty()) |
| return true; |
| if (!attrs.isConfigurable()) { |
| if (otherAttrs.hasConfigurable() && otherAttrs.isConfigurable()) |
| return false; |
| if (otherAttrs.hasEnumerable() && otherAttrs.isEnumerable() != attrs.isEnumerable()) |
| return false; |
| } |
| if (otherAttrs.isGeneric()) |
| return true; |
| if (attrs.isData() != otherAttrs.isData()) { |
| if (!attrs.isConfigurable()) |
| return false; |
| } else if (attrs.isData() && otherAttrs.isData()) { |
| if (!attrs.isConfigurable() && !attrs.isWritable()) { |
| if (otherAttrs.hasWritable() && otherAttrs.isWritable()) |
| return false; |
| if (!other->value.isEmpty() && !value.sameValue(other->value)) |
| return false; |
| } |
| } else if (attrs.isAccessor() && otherAttrs.isAccessor()) { |
| if (!attrs.isConfigurable()) { |
| if (!other->value.isEmpty() && !value.sameValue(other->value)) |
| return false; |
| if (!other->set.isEmpty() && !set.sameValue(other->set)) |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| explicit Property() { value = Encode::undefined(); set = Value::fromHeapObject(nullptr); } |
| Property(Heap::FunctionObject *getter, Heap::FunctionObject *setter) { |
| value.setM(reinterpret_cast<Heap::Base *>(getter)); |
| set.setM(reinterpret_cast<Heap::Base *>(setter)); |
| } |
| private: |
| Q_DISABLE_COPY(Property) |
| }; |
| |
| inline bool Property::isSubset(const PropertyAttributes &attrs, const Property *other, PropertyAttributes otherAttrs) const |
| { |
| if (attrs.type() != PropertyAttributes::Generic && attrs.type() != otherAttrs.type()) |
| return false; |
| if (attrs.hasEnumerable() && attrs.isEnumerable() != otherAttrs.isEnumerable()) |
| return false; |
| if (attrs.hasConfigurable() && attrs.isConfigurable() != otherAttrs.isConfigurable()) |
| return false; |
| if (attrs.hasWritable() && attrs.isWritable() != otherAttrs.isWritable()) |
| return false; |
| if (attrs.type() == PropertyAttributes::Data && !value.sameValue(other->value)) |
| return false; |
| if (attrs.type() == PropertyAttributes::Accessor) { |
| if (value.heapObject() != other->value.heapObject()) |
| return false; |
| if (set.heapObject() != other->set.heapObject()) |
| return false; |
| } |
| return true; |
| } |
| |
| inline void Property::merge(PropertyAttributes &attrs, const Property *other, PropertyAttributes otherAttrs) |
| { |
| if (otherAttrs.hasEnumerable()) |
| attrs.setEnumerable(otherAttrs.isEnumerable()); |
| if (otherAttrs.hasConfigurable()) |
| attrs.setConfigurable(otherAttrs.isConfigurable()); |
| if (otherAttrs.hasWritable()) |
| attrs.setWritable(otherAttrs.isWritable()); |
| if (otherAttrs.type() == PropertyAttributes::Accessor) { |
| attrs.setType(PropertyAttributes::Accessor); |
| if (!other->value.isEmpty()) |
| value = other->value; |
| if (!other->set.isEmpty()) |
| set = other->set; |
| } else if (otherAttrs.type() == PropertyAttributes::Data){ |
| attrs.setType(PropertyAttributes::Data); |
| value = other->value; |
| } |
| } |
| |
| struct PropertyIndex { |
| Heap::Base *base; |
| Value *slot; |
| |
| void set(EngineBase *e, Value newVal) { |
| WriteBarrier::write(e, base, slot->data_ptr(), newVal.asReturnedValue()); |
| } |
| const Value *operator->() const { return slot; } |
| const Value &operator*() const { return *slot; } |
| bool isNull() const { return !slot; } |
| }; |
| |
| |
| } |
| |
| Q_DECLARE_TYPEINFO(QV4::Property, Q_MOVABLE_TYPE); |
| |
| QT_END_NAMESPACE |
| |
| #endif |
