StructJsObject

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pub struct JsObject<T:NativeObject =ErasedObjectData> {/* private fields */ }

Expand description

Garbage collectedObject.

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implJsObject

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pub fndefault(intrinsics: &Intrinsics) -> Self

Creates a new ordinary object with its prototype set to theObject prototype.

This is an alias forSelf::with_object_proto.

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pub fnwith_object_proto(intrinsics: &Intrinsics) -> Self

Creates a new ordinary object with its prototype set to theObject prototype.

This is equivalent to calling the specification’s abstract operationOrdinaryObjectCreate(%Object.prototype%).

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pub fnwith_null_proto() -> Self

Creates a new ordinary object, with its prototype set to null.

This is equivalent to calling the specification’s abstract operationOrdinaryObjectCreate(null).

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pub fnfrom_proto_and_data<O:Into<Option<Self>>, T:NativeObject>( prototype: O, data: T,) -> Self

Creates a new object with the provided prototype and object data.

This is equivalent to calling the specification’s abstract operationOrdinaryObjectCreate,with the difference that theadditionalInternalSlotsList parameter is determined bythe provideddata.

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pub fndowncast<T:NativeObject>(self) ->Result<JsObject<T>, Self>

Downcasts the object’s inner data if the object is of typeT.

§Panics

Panics if the object is currently mutably borrowed.

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pub unsafe fndowncast_unchecked<T:NativeObject>(self) ->JsObject<T>

Downcasts the object’s inner data toT without verifying the inner type ofT.

§Safety

For this cast to be sound,self must contain an instance ofT inside its inner data.

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pub fndowncast_ref<T:NativeObject>(&self) ->Option<Ref<'_, T>>

Downcasts a reference to the object,if the object is of typeT.

§Panics

Panics if the object is currently mutably borrowed.

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pub fndowncast_mut<T:NativeObject>(&self) ->Option<RefMut<'_, T>>

Downcasts a mutable reference to the object,if the object is type native object typeT.

§Panics

Panics if the object is currently borrowed.

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pub fnis<T:NativeObject>(&self) ->bool

Checks if this object is an instance of a certainNativeObject.

§Panics

Panics if the object is currently mutably borrowed.

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pub fnis_ordinary(&self) ->bool

Checks if it’s an ordinary object.

§Panics

Panics if the object is currently mutably borrowed.

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pub fnis_array(&self) ->bool

Checks if it’s anArray object.

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pub fndeep_strict_equals( lhs: &Self, rhs: &Self, context: &mutContext,) ->JsResult<bool>

Checks that all own property keys and values are equal (recursively).

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pub fnto_property_descriptor( &self, context: &mutContext,) ->JsResult<PropertyDescriptor>

The abstract operationToPropertyDescriptor.

More information:

ECMAScript reference

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pub fncopy_data_properties<K>( &self, source: &JsValue, excluded_keys:Vec<K>, context: &mutContext,) ->JsResult<()>
where K:Into<PropertyKey>,

7.3.25 CopyDataProperties ( target, source, excludedItems )

More information:

ECMAScript

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impl<T:NativeObject>JsObject<T>

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pub fnborrow(&self) ->Ref<'_,Object<T>>

Immutably borrows theObject.

The borrow lasts until the returnedRef exits scope.Multiple immutable borrows can be taken out at the same time.

§Panics

Panics if the object is currently mutably borrowed.

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pub fnborrow_mut(&self) ->RefMut<'_,Object<T>>

Mutably borrows the Object.

The borrow lasts until the returnedRefMut exits scope.The object cannot be borrowed while this borrow is active.

§Panics

Panics if the object is currently borrowed.

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pub fntry_borrow(&self) ->StdResult<Ref<'_,Object<T>>,BorrowError>

Immutably borrows theObject, returning an error if the value is currently mutably borrowed.

The borrow lasts until the returnedGcCellRef exits scope.Multiple immutable borrows can be taken out at the same time.

This is the non-panicking variant ofborrow.

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pub fntry_borrow_mut(&self) ->StdResult<RefMut<'_,Object<T>>,BorrowMutError>

Mutably borrows the object, returning an error if the value is currently borrowed.

The borrow lasts until the returnedGcCellRefMut exits scope.The object be borrowed while this borrow is active.

This is the non-panicking variant ofborrow_mut.

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pub fnequals(lhs: &Self, rhs: &Self) ->bool

Checks if the garbage collected memory is the same.

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pub fnprototype(&self) ->JsPrototype

Get the prototype of the object.

§Panics

Panics if the object is currently mutably borrowed.

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pub fnset_prototype(&self, prototype:JsPrototype) ->bool

Set the prototype of the object.

§Panics

Panics if the object is currently mutably borrowed

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pub fninsert_property<K, P>(&self, key: K, property: P) ->bool
where K:Into<PropertyKey>, P:Into<PropertyDescriptor>,

Inserts a field in the objectproperties without checking if it’s writable.

If a field was already in the object with the same name, thantrue is returnedwith that field, otherwisefalse is returned.

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pub fnis_callable(&self) ->bool

It determines if Object is a callable function with a[[Call]] internal method.

More information:

ECMAScript reference

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pub fnis_constructor(&self) ->bool

It determines if Object is a function object with a[[Construct]] internal method.

More information:

ECMAScript reference

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impl<T:NativeObject>JsObject<T>

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pub fnnew<O:Into<Option<JsObject>>>( root_shape: &RootShape, prototype: O, data: T,) -> Self

Creates a newJsObject from its root shape, prototype, and data.

Note that the returned object will not be erased to be convertible to aJsValue. To erase the pointer, callJsObject::upcast.

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pub fnnew_unique<O:Into<Option<JsObject>>>(prototype: O, data: T) -> Self

Creates a newJsObject from prototype, and data.

Note that the returned object will not be erased to be convertible to aJsValue. To erase the pointer, callJsObject::upcast.

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pub fnupcast(self) ->JsObject

Upcasts this object’s inner data from a specific typeT to an erased typedyn NativeObject.

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implJsObject

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pub fnis_extensible(&self, context: &mutContext) ->JsResult<bool>

Check if object is extensible.

More information:

ECMAScript reference

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pub fnget<K>(&self, key: K, context: &mutContext) ->JsResult<JsValue>
where K:Into<PropertyKey>,

Get property from object or throw.

More information:

ECMAScript reference

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pub fnset<K, V>( &self, key: K, value: V, throw:bool, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>, V:Into<JsValue>,

set property of object or throw if bool flag is passed.

More information:

ECMAScript reference

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pub fncreate_data_property<K, V>( &self, key: K, value: V, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>, V:Into<JsValue>,

Create data property

More information:

ECMAScript reference

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pub fncreate_data_property_or_throw<K, V>( &self, key: K, value: V, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>, V:Into<JsValue>,

Create data property or throw

More information:

ECMAScript reference

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pub fndefine_property_or_throw<K, P>( &self, key: K, desc: P, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>, P:Into<PropertyDescriptor>,

Define property or throw.

More information:

ECMAScript reference

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pub fndelete_property_or_throw<K>( &self, key: K, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>,

Defines the property or throws aTypeError if the operation fails.

More information:

ECMAScript reference

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pub fnhas_property<K>(&self, key: K, context: &mutContext) ->JsResult<bool>
where K:Into<PropertyKey>,

Check if object has property.

More information:

ECMAScript reference

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pub fnhas_own_property<K>( &self, key: K, context: &mutContext,) ->JsResult<bool>
where K:Into<PropertyKey>,

Check if object has an own property.

More information:

ECMAScript reference

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pub fnown_property_keys( &self, context: &mutContext,) ->JsResult<Vec<PropertyKey>>

Get all the keys of the properties of this object.

More information:

ECMAScript reference

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pub fncall( &self, this: &JsValue, args: &[JsValue], context: &mutContext,) ->JsResult<JsValue>

Call ( F, V [ , argumentsList ] )

§Panics

Panics if the object is currently mutably borrowed.

More information:

ECMAScript reference

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pub fnconstruct( &self, args: &[JsValue], new_target:Option<&Self>, context: &mutContext,) ->JsResult<Self>

Construct ( F [ , argumentsList [ , newTarget ] ] )

Construct an instance of this object with the specified arguments.

§Panics

Panics if the object is currently mutably borrowed.

More information:

ECMAScript reference

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pub fnset_integrity_level( &self, level:IntegrityLevel, context: &mutContext,) ->JsResult<bool>

Make the objectsealed orfrozen.

More information:

ECMAScript reference

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pub fntest_integrity_level( &self, level:IntegrityLevel, context: &mutContext,) ->JsResult<bool>

Check if the object issealed orfrozen.

More information:

ECMAScript reference

Trait Implementations§

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impl<T:NativeObject>AsRef<GcRefCell<Object<T>>> forJsObject<T>

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fnas_ref(&self) -> &GcRefCell<Object<T>>

Converts this type into a shared reference of the (usually inferred) input type.

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impl<T:NativeObject>Clone forJsObject<T>

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fnclone(&self) -> Self

Returns a duplicate of the value.Read more

1.0.0 ·Source§

fnclone_from(&mut self, source: &Self)

Performs copy-assignment fromsource.Read more

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impl<T:NativeObject>Debug forJsObject<T>

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fnfmt(&self, f: &mutFormatter<'_>) ->Result

Formats the value using the given formatter.Read more

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impl<T:NativeObject>Finalize forJsObject<T>

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fnfinalize(&self)

Cleanup logic for a type.

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