Enum boa::property::PropertyDescriptor

pub enum PropertyDescriptor {
    Accessor(AccessorDescriptor),
    Data(DataDescriptor),
}

This represents a JavaScript Property AKA The Property Descriptor.

Property descriptors present in objects come in two main flavors:

• data descriptors
• accessor descriptors

A data descriptor is a property that has a value, which may or may not be writable. An accessor descriptor is a property described by a getter-setter pair of functions. A descriptor must be one of these two flavors; it cannot be both.

More information:

• MDN documentation
• ECMAScript reference

Variants

Accessor(AccessorDescriptor)

Data(DataDescriptor)

Implementations

impl PropertyDescriptor

pub fn is_accessor_descriptor(&self) -> bool

An accessor Property Descriptor is one that includes any fields named either [[Get]] or [[Set]].

More information:

• ECMAScript reference

pub fn as_accessor_descriptor(&self) -> Option<&AccessorDescriptor>

Return Some() if it is a accessor descriptor, None otherwise.

pub fn is_data_descriptor(&self) -> bool

A data Property Descriptor is one that includes any fields named either [[Value]] or [[Writable]].

More information:

• ECMAScript reference

pub fn as_data_descriptor(&self) -> Option<&DataDescriptor>

Return Some() if it is a data descriptor, None otherwise.

pub fn enumerable(&self) -> bool

Check whether the descriptor is enumerable.

pub fn configurable(&self) -> bool

Check whether the descriptor is configurable.

pub fn attributes(&self) -> Attribute

Return the attributes of the descriptor.

Trait Implementations

impl Clone for PropertyDescriptor

pub fn clone(&self) -> PropertyDescriptor

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PropertyDescriptor

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for PropertyDescriptor

pub fn drop(&mut self)

Executes the destructor for this type.

impl Finalize for PropertyDescriptor

pub fn finalize(&self)

impl From<AccessorDescriptor> for PropertyDescriptor

pub fn from(value: AccessorDescriptor) -> Self

Performs the conversion.

impl From<DataDescriptor> for PropertyDescriptor

pub fn from(value: DataDescriptor) -> Self

Performs the conversion.

impl Trace for PropertyDescriptor

pub unsafe fn trace(&self)

Marks all contained Gcs.

pub unsafe fn root(&self)

Increments the root-count of all contained Gcs.

pub unsafe fn unroot(&self)

Decrements the root-count of all contained Gcs.

pub fn finalize_glue(&self)

Runs Finalize::finalize() on this object and all contained subobjects