Struct boa::property::PropertyDescriptor

pub struct PropertyDescriptor { /* private fields */ }

This represents a JavaScript Property AKA The Property Descriptor.

Property descriptors present in objects come in three main flavors:

• data descriptors
• accessor descriptors
• generic descriptor

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

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

A generic Property Descriptor is a Property Descriptor value that is neither a data Property Descriptor nor an accessor Property Descriptor.

More information:

• MDN documentation
• ECMAScript reference

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 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 is_generic_descriptor(&self) -> bool

A generic Property Descriptor is one that is neither a data descriptor nor an accessor descriptor.

More information:

• ECMAScript reference

pub fn is_empty(&self) -> bool

pub fn enumerable(&self) -> Option<bool>

pub fn configurable(&self) -> Option<bool>

pub fn writable(&self) -> Option<bool>

pub fn value(&self) -> Option<&JsValue>

pub fn get(&self) -> Option<&JsValue>

pub fn set(&self) -> Option<&JsValue>

pub fn expect_enumerable(&self) -> bool

pub fn expect_configurable(&self) -> bool

pub fn expect_writable(&self) -> bool

pub fn expect_value(&self) -> &JsValue

pub fn expect_get(&self) -> &JsValue

pub fn expect_set(&self) -> &JsValue

pub fn kind(&self) -> &DescriptorKind

pub fn builder() -> PropertyDescriptorBuilder

pub fn into_accessor_defaulted(self) -> Self

pub fn into_data_defaulted(self) -> Self

pub fn complete_property_descriptor(self) -> Self

pub fn fill_with(&mut self, desc: Self)

Trait Implementations

impl Clone for PropertyDescriptor

fn clone(&self) -> PropertyDescriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PropertyDescriptor

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

Formats the value using the given formatter.

impl Default for PropertyDescriptor

fn default() -> PropertyDescriptor

Returns the “default value” for a type.

impl Drop for PropertyDescriptor

fn drop(&mut self)

Executes the destructor for this type.

impl Finalize for PropertyDescriptor

fn finalize(&self)

impl From<PropertyDescriptorBuilder> for PropertyDescriptor

fn from(builder: PropertyDescriptorBuilder) -> Self

Converts to this type from the input type.

impl Trace for PropertyDescriptor

unsafe fn trace(&self)

Marks all contained Gcs.

unsafe fn root(&self)

Increments the root-count of all contained Gcs.

unsafe fn unroot(&self)

Decrements the root-count of all contained Gcs.

fn finalize_glue(&self)

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