Struct Value 

pub struct Value(/* private fields */);

A JavaScript value, or the internal hole marker Value::EMPTY.

Copy, no Drop, no ownership protocol. Heap kinds carry a 32-bit arena index; holding one across an allocation requires rooting it (see the crate README).

Implementations

impl Value

pub const UNDEFINED: Value

pub const NULL: Value

pub const TRUE: Value

pub const FALSE: Value

pub const EMPTY: Value

The internal hole marker: array holes, uninitialized bindings, empty slots. Never a JavaScript value.

pub fn number(value: f64) -> Value

A double; no attempt is made to produce an Int32. A NaN keeps its bits, as QuickJS’s unboxed doubles do (x86’s 0.0 / 0.0 is 0xFFF8_0000_0000_0000, which a Float64Array shows), unless they fall in the boxed range: those become CANONICAL_NAN.

pub const fn int32(value: i32) -> Value

pub const fn bool(value: bool) -> Value

pub const fn object(id: ObjectId) -> Value

pub const fn string(id: StringId) -> Value

pub const fn symbol(id: SymbolId) -> Value

pub const fn bigint(id: BigIntId) -> Value

pub const fn bits(self) -> u64

The raw bit pattern.

pub fn kind(self) -> Kind

pub const fn is_number(self) -> bool

Int32 or double.

pub const fn is_double(self) -> bool

pub const fn is_int32(self) -> bool

pub const fn is_empty(self) -> bool

pub const fn is_undefined(self) -> bool

pub const fn is_null(self) -> bool

pub fn as_f64(self) -> Option<f64>

The numeric value, Int32 widened.

pub const fn as_int32(self) -> Option<i32>

pub const fn as_bool(self) -> Option<bool>

pub const fn as_object(self) -> Option<ObjectId>

pub const fn as_string(self) -> Option<StringId>

pub const fn as_symbol(self) -> Option<SymbolId>

pub const fn as_bigint(self) -> Option<BigIntId>

pub const fn is_heap(self) -> bool

True for the kinds whose payload is a heap index.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Value

impl Debug for Value

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

Formats the value using the given formatter.

impl Eq for Value

impl Hash for Value

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

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 for Value

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Value