Struct PropertyDescriptor 

pub struct PropertyDescriptor<'a> {
    pub value: Option<Value<'a>>,
    pub writable: Option<bool>,
    pub get: Option<Option<Function<'a>>>,
    pub set: Option<Option<Function<'a>>>,
    pub enumerable: Option<bool>,
    pub configurable: Option<bool>,
}

6.2.6 The Property Descriptor Specification Type

Fields

value: Option<Value<'a>>

[[Value]]

writable: Option<bool>

[[Writable]]

get: Option<Option<Function<'a>>>

[[Get]]

Note: double-Option because these fields can be set explicitly undefined to unset them.

set: Option<Option<Function<'a>>>

[[Set]]

Note: double-Option because these fields can be set explicitly undefined to unset them.

enumerable: Option<bool>

[[Enumerable]]

configurable: Option<bool>

[[Configurable]]

Implementations

impl<'a> PropertyDescriptor<'a>

pub fn new_data_descriptor(value: impl Into<Value<'a>>) -> Self

Creates a new data descriptor from a Value.

Data descriptors are writable, enumerable, and configurable.

pub fn non_enumerable_data_descriptor(value: impl Into<Value<'a>>) -> Self

Creates a new non-enumerable data descriptor from a Value.

pub fn new_prototype_method_descriptor( function: impl Into<Function<'a>>, ) -> Self

Creates a new non-enumerable data descriptor from a Function.

pub fn is_accessor_descriptor(&self) -> bool

6.2.6.1 IsAccessorDescriptor ( Desc )

pub fn is_data_descriptor(&self) -> bool

6.2.6.2 IsDataDescriptor ( Desc )

pub fn is_generic_descriptor(&self) -> bool

6.2.6.3 IsGenericDescriptor ( Desc )

pub fn from_property_descriptor( desc: Option<Self>, agent: &mut Agent, gc: NoGcScope<'a, '_>, ) -> Option<OrdinaryObject<'a>>

6.2.6.4 FromPropertyDescriptor ( Desc )

The abstract operation FromPropertyDescriptor takes argument Desc (a Property Descriptor or undefined) and returns an Object or undefined.

pub fn to_property_descriptor( agent: &mut Agent, obj: Value<'_>, gc: GcScope<'a, '_>, ) -> JsResult<'a, Self>

6.2.6.5 ToPropertyDescriptor ( Obj )

The abstract operation ToPropertyDescriptor takes argument Obj (an ECMAScript language value) and returns either a normal completion containing a Property Descriptor or a throw completion.

pub fn is_fully_populated(&self) -> bool

Returns true if this property descriptor has been fully populated with enumerable and configurable bits, and either a value and a writable bit OR at least a getter or setter function.

pub fn has_fields(&self) -> bool

Returns true if this property descriptor has any fields populated.

Trait Implementations

impl Bindable for PropertyDescriptor<'_>

type Of<'a> = PropertyDescriptor<'a>

Bound representation of self. This must always be effectively equal to Self<'a>. Note that we cannot write Self<'a> directly because Self cannot have lifetime parameters attached to it.

fn unbind(self) -> Self::Of<'static>

Unbind this value from the garbage collector lifetime. This is necessary for eg. when using the value as a parameter in a call that can perform garbage collection.

fn bind<'a>(self, _: NoGcScope<'a, '_>) -> Self::Of<'a>

Bind this value to the garbage collector lifetime. This is necessary to enable the borrow checker to check that bindable values are not use-after-free.

impl<'a> Clone for PropertyDescriptor<'a>

fn clone(&self) -> PropertyDescriptor<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for PropertyDescriptor<'a>

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

Formats the value using the given formatter.

impl<'a> Default for PropertyDescriptor<'a>

fn default() -> PropertyDescriptor<'a>

Returns the “default value” for a type.

impl<'a> PartialEq for PropertyDescriptor<'a>

fn eq(&self, other: &PropertyDescriptor<'a>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'a> StructuralPartialEq for PropertyDescriptor<'a>