Struct swc_core::ecma::utils::number::JsNumber

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

Available on crate features __ecma and __utils only.

Implementations

impl JsNumber

pub fn pow(self, rhs: JsNumber) -> JsNumber

impl JsNumber

pub fn unsigned_shr(self, rhs: JsNumber) -> JsNumber

Methods from Deref<Target = f64>

pub const RADIX: u32 = 2u32

pub const MANTISSA_DIGITS: u32 = 53u32

pub const DIGITS: u32 = 15u32

pub const EPSILON: f64 = 2.2204460492503131E-16f64

pub const MIN: f64 = -1.7976931348623157E+308f64

pub const MIN_POSITIVE: f64 = 2.2250738585072014E-308f64

pub const MAX: f64 = 1.7976931348623157E+308f64

pub const MIN_EXP: i32 = -1_021i32

pub const MAX_EXP: i32 = 1_024i32

pub const MIN_10_EXP: i32 = -307i32

pub const MAX_10_EXP: i32 = 308i32

pub const NAN: f64 = NaN_f64

pub const INFINITY: f64 = +Inf_f64

pub const NEG_INFINITY: f64 = -Inf_f64

pub fn total_cmp(&self, other: &f64) -> Ordering

Return the ordering between self and other.

Unlike the standard partial comparison between floating point numbers, this comparison always produces an ordering in accordance to the totalOrder predicate as defined in the IEEE 754 (2008 revision) floating point standard. The values are ordered in the following sequence:

• negative quiet NaN
• negative signaling NaN
• negative infinity
• negative numbers
• negative subnormal numbers
• negative zero
• positive zero
• positive subnormal numbers
• positive numbers
• positive infinity
• positive signaling NaN
• positive quiet NaN.

The ordering established by this function does not always agree with the PartialOrd and PartialEq implementations of f64. For example, they consider negative and positive zero equal, while total_cmp doesn’t.

The interpretation of the signaling NaN bit follows the definition in the IEEE 754 standard, which may not match the interpretation by some of the older, non-conformant (e.g. MIPS) hardware implementations.

Example

struct GoodBoy {
    name: String,
    weight: f64,
}

let mut bois = vec![
    GoodBoy { name: "Pucci".to_owned(), weight: 0.1 },
    GoodBoy { name: "Woofer".to_owned(), weight: 99.0 },
    GoodBoy { name: "Yapper".to_owned(), weight: 10.0 },
    GoodBoy { name: "Chonk".to_owned(), weight: f64::INFINITY },
    GoodBoy { name: "Abs. Unit".to_owned(), weight: f64::NAN },
    GoodBoy { name: "Floaty".to_owned(), weight: -5.0 },
];

bois.sort_by(|a, b| a.weight.total_cmp(&b.weight));

// `f64::NAN` could be positive or negative, which will affect the sort order.
if f64::NAN.is_sign_negative() {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([f64::NAN, -5.0, 0.1, 10.0, 99.0, f64::INFINITY].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
} else {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([-5.0, 0.1, 10.0, 99.0, f64::INFINITY, f64::NAN].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
}

Trait Implementations

impl Add for JsNumber

type Output = JsNumber

The resulting type after applying the + operator.

fn add(self, rhs: JsNumber) -> <JsNumber as Add>::Output

Performs the + operation.

impl BitAnd for JsNumber

type Output = JsNumber

The resulting type after applying the & operator.

fn bitand(self, rhs: JsNumber) -> <JsNumber as BitAnd>::Output

Performs the & operation.

impl BitOr for JsNumber

type Output = JsNumber

The resulting type after applying the | operator.

fn bitor(self, rhs: JsNumber) -> <JsNumber as BitOr>::Output

Performs the | operation.

impl BitXor for JsNumber

type Output = JsNumber

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: JsNumber) -> <JsNumber as BitXor>::Output

Performs the ^ operation.

impl Clone for JsNumber

fn clone(&self) -> JsNumber

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for JsNumber

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

Formats the value using the given formatter.

impl Deref for JsNumber

type Target = f64

The resulting type after dereferencing.

fn deref(&self) -> &<JsNumber as Deref>::Target

Dereferences the value.

impl Div for JsNumber

type Output = JsNumber

The resulting type after applying the / operator.

fn div(self, rhs: JsNumber) -> <JsNumber as Div>::Output

Performs the / operation.

impl From<JsNumber> for f64

fn from(v: JsNumber) -> f64

Converts to this type from the input type.

impl From<f64> for JsNumber

fn from(v: f64) -> JsNumber

Converts to this type from the input type.

impl Mul for JsNumber

type Output = JsNumber

The resulting type after applying the * operator.

fn mul(self, rhs: JsNumber) -> <JsNumber as Mul>::Output

Performs the * operation.

impl Neg for JsNumber

type Output = JsNumber

The resulting type after applying the - operator.

fn neg(self) -> <JsNumber as Neg>::Output

Performs the unary - operation.

impl Not for JsNumber

type Output = JsNumber

The resulting type after applying the ! operator.

fn not(self) -> <JsNumber as Not>::Output

Performs the unary ! operation.

impl PartialEq for JsNumber

fn eq(&self, other: &JsNumber) -> 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 Rem for JsNumber

type Output = JsNumber

The resulting type after applying the % operator.

fn rem(self, rhs: JsNumber) -> <JsNumber as Rem>::Output

Performs the % operation.

impl Shl for JsNumber

type Output = JsNumber

The resulting type after applying the << operator.

fn shl(self, rhs: JsNumber) -> <JsNumber as Shl>::Output

Performs the << operation.

impl Shr for JsNumber

type Output = JsNumber

The resulting type after applying the >> operator.

fn shr(self, rhs: JsNumber) -> <JsNumber as Shr>::Output

Performs the >> operation.

impl Sub for JsNumber

type Output = JsNumber

The resulting type after applying the - operator.

fn sub(self, rhs: JsNumber) -> <JsNumber as Sub>::Output

Performs the - operation.

impl Copy for JsNumber

impl StructuralPartialEq for JsNumber