Struct Undefined 

#[repr(transparent)]
pub struct Undefined {
    pub obj: JsValue,
}

Fields

obj: JsValue

Implementations

impl Undefined

pub const UNDEFINED: Undefined

Trait Implementations

impl AsRef<JsValue> for Undefined

fn as_ref(&self) -> &JsValue

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

impl BatchableResult for Undefined

fn try_placeholder(batch: &mut Runtime) -> Option<Self>

Returns Some(placeholder) for opaque types that can be batched, None for types that require flushing to get the actual value.

impl BinaryDecode for Undefined

fn decode(decoder: &mut DecodedData<'_>) -> Result<Self, DecodeError>

impl BinaryEncode for Undefined

fn encode(self, encoder: &mut EncodedData)

impl Clone for Undefined

fn clone(&self) -> Undefined

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Undefined

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

Formats the value using the given formatter.

impl Default for Undefined

fn default() -> Self

Returns the “default value” for a type.

impl Display for Undefined

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

Formats the value using the given formatter.

impl EncodeTypeDef for Undefined

fn encode_type_def(buf: &mut Vec<u8>)

Encode this type’s definition into the buffer. For primitives, this is just the TypeTag byte. For callbacks, this includes param count, param types, and return type.

impl ErasableGeneric for Undefined

type Repr = JsValue

impl From<JsValue> for Undefined

fn from(obj: JsValue) -> Self

Converts to this type from the input type.

impl From<Undefined> for JsValue

fn from(value: Undefined) -> JsValue

Converts to this type from the input type.

impl IntoJsGeneric for Undefined

type JsCanon = Undefined

fn to_js(self) -> Self

impl JsCast for Undefined

fn instanceof(value: &JsValue) -> bool

Check if a JsValue is an instance of this type.

fn is_type_of(value: &JsValue) -> bool

Performs a dynamic type check to see whether the JsValue provided is a value of this type.

fn unchecked_from_js(value: JsValue) -> Self

Unchecked cast from JsValue to this type.

fn unchecked_from_js_ref(value: &JsValue) -> &Self

Unchecked cast from a JsValue reference to a reference of this type.

fn has_type<T>(&self) -> bool

where T: JsCast,

Test whether this JS value has a type T.

fn dyn_into<T>(self) -> Result<T, Self>

where T: JsCast,

Try to cast this value to type T.

fn dyn_ref<T>(&self) -> Option<&T>

where T: JsCast,

Try to get a reference to type T from this value.

fn is_instance_of<T>(&self) -> bool

where T: JsCast,

Test whether this JS value is an instance of the type T.

fn unchecked_into<T>(self) -> T

where T: JsCast,

Unchecked cast to another type.

fn unchecked_ref<T>(&self) -> &T

where T: JsCast,

Unchecked cast to a reference of another type.

impl PartialEq for Undefined

fn eq(&self, other: &Undefined) -> 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 Eq for Undefined

impl StructuralPartialEq for Undefined

impl UpcastFrom<()> for Undefined

impl UpcastFrom<Undefined> for ()

impl<T> UpcastFrom<Undefined> for JsOption<T>

impl UpcastFrom<Undefined> for JsValue

impl UpcastFrom<Undefined> for Undefined