Enum mozjs::jsapi::JSWhyMagic

#[repr(u32)]
pub enum JSWhyMagic {
    JS_ELEMENTS_HOLE,
    JS_NO_ITER_VALUE,
    JS_GENERATOR_CLOSING,
    JS_ARG_POISON,
    JS_SERIALIZE_NO_NODE,
    JS_IS_CONSTRUCTING,
    JS_HASH_KEY_EMPTY,
    JS_ION_ERROR,
    JS_ION_BAILOUT,
    JS_OPTIMIZED_OUT,
    JS_UNINITIALIZED_LEXICAL,
    JS_MISSING_ARGUMENTS,
    JS_GENERIC_MAGIC,
    JS_ERROR_WITHOUT_CAUSE,
    JS_WHY_MAGIC_COUNT,
}

Variants

JS_ELEMENTS_HOLE

a hole in a native object’s elements

JS_NO_ITER_VALUE

there is not a pending iterator value

JS_GENERATOR_CLOSING

exception value thrown when closing a generator

JS_ARG_POISON

used in debug builds to catch tracing errors

JS_SERIALIZE_NO_NODE

an empty subnode in the AST serializer

JS_IS_CONSTRUCTING

magic value passed to natives to indicate construction

JS_HASH_KEY_EMPTY

see class js::HashableValue

JS_ION_ERROR

error while running Ion code

JS_ION_BAILOUT

missing recover instruction result

JS_OPTIMIZED_OUT

optimized out slot

JS_UNINITIALIZED_LEXICAL

uninitialized lexical bindings that produce ReferenceError on touch.

JS_MISSING_ARGUMENTS

arguments object can’t be created because environment is dead.

JS_GENERIC_MAGIC

for local use

JS_ERROR_WITHOUT_CAUSE

When an error object is created without the error cause argument, we set the error’s cause slot to this magic value.

JS_WHY_MAGIC_COUNT

When an error object is created without the error cause argument, we set the error’s cause slot to this magic value.

Trait Implementations

impl Clone for JSWhyMagic

fn clone(&self) -> JSWhyMagic

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for JSWhyMagic

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

Formats the value using the given formatter.

impl Hash for JSWhyMagic

fn hash<__H>(&self, state: &mut __H)where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<JSWhyMagic> for JSWhyMagic

fn eq(&self, other: &JSWhyMagic) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for JSWhyMagic

impl Eq for JSWhyMagic

impl StructuralEq for JSWhyMagic

impl StructuralPartialEq for JSWhyMagic