Struct boa::builtins::property::Property

pub struct Property {
    pub configurable: Option<bool>,
    pub enumerable: Option<bool>,
    pub writable: Option<bool>,
    pub value: Option<Value>,
    pub get: Option<Value>,
    pub set: Option<Value>,
}

A Javascript Property AKA The Property Descriptor
[SPEC] - The Property Descriptor Specification Type
[SPEC] - Default Attribute Values

Any field in a JavaScript Property may be present or absent.

Fields

configurable: Option<bool>

If the type of this can be changed and this can be deleted

enumerable: Option<bool>

If the property shows up in enumeration of the object

writable: Option<bool>

If this property can be changed with an assignment

value: Option<Value>

The value associated with the property

get: Option<Value>

The function serving as getter

set: Option<Value>

The function serving as setter

Implementations

impl Property

pub fn is_property_key(value: &Value) -> bool

Checks if the provided Value can be used as a property key.

pub fn new() -> Self

Make a new property with the given value The difference between New and Default:

New: zeros everything to make an empty object Default: Defaults according to the spec

pub fn configurable(self, configurable: bool) -> Self

Set configurable

pub fn enumerable(self, enumerable: bool) -> Self

Set enumerable

pub fn writable(self, writable: bool) -> Self

Set writable

pub fn value(self, value: Value) -> Self

Set value

pub fn get(self, get: Value) -> Self

Set get

pub fn set(self, set: Value) -> Self

Set set

pub fn is_none(&self) -> bool

Is this an empty Property?

true if all fields are set to none

pub fn is_accessor_descriptor(&self) -> bool

An accessor Property Descriptor is one that includes any fields named either [[Get]] or [[Set]].
https://tc39.es/ecma262/#sec-isaccessordescriptor

pub fn is_data_descriptor(&self) -> bool

A data Property Descriptor is one that includes any fields named either [Value] or [[Writable]].
https://tc39.es/ecma262/#sec-isdatadescriptor

pub fn is_generic_descriptor(&self) -> bool

https://tc39.es/ecma262/#sec-isgenericdescriptor

Trait Implementations

impl Clone for Property

fn clone(&self) -> Property

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Property

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

Formats the value using the given formatter.

impl Default for Property

fn default() -> Self

Make a default property https://tc39.es/ecma262/#table-default-attribute-values

impl Drop for Property

fn drop(&mut self)

Executes the destructor for this type.

impl Finalize for Property

fn finalize(&self)

impl FromValue for Property

fn from_value(v: Value) -> Result<Self, &'static str>

Attempt to fetch values "configurable", "enumerable", "writable" from the value, if they're not there default to false

impl ToValue for Property

fn to_value(&self) -> Value

Convert this value to a Rust value

impl Trace for Property

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