Struct CssSignedNumber 

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

A CSS float value similar to f32 but with a more restricted range

Methods from Deref<Target = f32>

pub const RADIX: u32 = 2u32

pub const MANTISSA_DIGITS: u32 = 24u32

pub const DIGITS: u32 = 6u32

pub const EPSILON: f32 = 1.1920929E-7f32

pub const MIN: f32 = -3.40282347E+38f32

pub const MIN_POSITIVE: f32 = 1.17549435E-38f32

pub const MAX: f32 = 3.40282347E+38f32

pub const MIN_EXP: i32 = -125i32

pub const MAX_EXP: i32 = 128i32

pub const MIN_10_EXP: i32 = -37i32

pub const MAX_10_EXP: i32 = 38i32

pub const NAN: f32 = NaN_f32

pub const INFINITY: f32 = +Inf_f32

pub const NEG_INFINITY: f32 = -Inf_f32

pub fn total_cmp(&self, other: &f32) -> Ordering

Returns 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 f32. 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: f32,
}

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: f32::INFINITY },
    GoodBoy { name: "Abs. Unit".to_owned(), weight: f32::NAN },
    GoodBoy { name: "Floaty".to_owned(), weight: -5.0 },
];

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

// `f32::NAN` could be positive or negative, which will affect the sort order.
if f32::NAN.is_sign_negative() {
    assert!(bois.into_iter().map(|b| b.weight)
        .zip([f32::NAN, -5.0, 0.1, 10.0, 99.0, f32::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, f32::INFINITY, f32::NAN].iter())
        .all(|(a, b)| a.to_bits() == b.to_bits()))
}

Trait Implementations

impl Add for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the + operator.

fn add(self, rhs: CssSignedNumber) -> Self::Output

Performs the + operation.

impl AddAssign for CssSignedNumber

fn add_assign(&mut self, rhs: CssSignedNumber)

Performs the += operation.

impl AppUnitsPer for CssSignedNumber

const AppUnitsPerPX: Self

Number of app units per pixel

const AppUnitsPerIN: Self

Number of app units per inch

const AppUnitsPerCM: Self

Number of app units per centimeter

const AppUnitsPerMM: Self

Number of app units per millimeter

const AppUnitsPerQ: Self

Number of app units per quarter

const AppUnitsPerPT: Self

Number of app units per point

const AppUnitsPerPC: Self

Number of app units per pica

impl Clone for CssSignedNumber

fn clone(&self) -> CssSignedNumber

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CssNumber for CssSignedNumber

const Zero: Self

const One: Self

const Maximum: Self

const Minimum: Self

const DotsPerInch: Self

const CentimetresPerInch: Self

fn as_f32(&self) -> f32

fn as_u32(&self) -> u32

fn parseNumber<'i>( value: f32, _int_value: Option<i32>, ) -> Result<Self, ParseError<'i, CustomParseError<'i>>>

fn new(value: f32) -> Result<Self, CssNumberConversionError>

fn round(self) -> Self

fn abs(self) -> Self

fn clamp(value: f32) -> Self

fn can_be_negative() -> bool

impl CssNumberNewType<CssSignedNumber> for CssSignedNumber

fn to_f32(&self) -> f32

fn as_CssNumber(&self) -> &CssSignedNumber

fn to_CssNumber(&self) -> Number

fn is_zero(&self) -> bool

fn is_positive(&self) -> bool

fn is_negative(&self) -> bool

fn is_zero_or_positive(&self) -> bool

fn is_zero_or_negative(&self) -> bool

impl Debug for CssSignedNumber

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

Formats the value using the given formatter.

impl Default for CssSignedNumber

fn default() -> Self

Returns the “default value” for a type.

impl Deref for CssSignedNumber

type Target = f32

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Display for CssSignedNumber

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

Formats the value using the given formatter.

impl Div for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the / operator.

fn div(self, rhs: CssSignedNumber) -> Self::Output

Performs the / operation.

impl DivAssign for CssSignedNumber

fn div_assign(&mut self, rhs: CssSignedNumber)

Performs the /= operation.

impl From<i16> for CssSignedNumber

fn from(small: i16) -> CssSignedNumber

Converts to this type from the input type.

impl From<i8> for CssSignedNumber

fn from(small: i8) -> CssSignedNumber

Converts to this type from the input type.

impl From<u16> for CssSignedNumber

fn from(small: u16) -> CssSignedNumber

Converts to this type from the input type.

impl From<u8> for CssSignedNumber

fn from(small: u8) -> CssSignedNumber

Converts to this type from the input type.

impl FromStr for CssSignedNumber

type Err = UnitFromStrError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for CssSignedNumber

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 LowerExp for CssSignedNumber

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

Formats the value using the given formatter.

impl Mul for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the * operator.

fn mul(self, rhs: CssSignedNumber) -> Self::Output

Performs the * operation.

impl MulAssign for CssSignedNumber

fn mul_assign(&mut self, rhs: CssSignedNumber)

Performs the *= operation.

impl Neg for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the - operator.

fn neg(self) -> Self::Output

Performs the unary - operation.

impl Ord for CssSignedNumber

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for CssSignedNumber

fn eq(&self, other: &Self) -> 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 PartialOrd for CssSignedNumber

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Rem for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the % operator.

fn rem(self, rhs: CssSignedNumber) -> Self::Output

Performs the % operation.

impl RemAssign for CssSignedNumber

fn rem_assign(&mut self, rhs: CssSignedNumber)

Performs the %= operation.

impl Sub for CssSignedNumber

type Output = CssSignedNumber

The resulting type after applying the - operator.

fn sub(self, rhs: CssSignedNumber) -> Self::Output

Performs the - operation.

impl SubAssign for CssSignedNumber

fn sub_assign(&mut self, rhs: CssSignedNumber)

Performs the -= operation.

impl ToCss for CssSignedNumber

fn to_css<W: Write>(&self, dest: &mut W) -> Result

Serialize self in CSS syntax, writing to dest.

fn to_css_string(&self) -> String

Serialize self in CSS syntax and return a string.

impl Unit for CssSignedNumber

const HasDimension: bool = false

type Number = CssSignedNumber

fn parse_one_outside_calc_function<'i, 't>( context: &ParserContext, input: &mut Parser<'i, 't>, ) -> Result<CalculablePropertyValue<Self>, ParseError<'i, CustomParseError<'i>>>

fn parse_one_inside_calc_function<'i, 't>( context: &ParserContext, input: &mut Parser<'i, 't>, ) -> Result<Either<CalculablePropertyValue<Self>, CalcExpression<Self>>, ParseError<'i, CustomParseError<'i>>>

fn to_canonical_dimension_value<Conversion: FontRelativeLengthConversion<Self::Number> + ViewportPercentageLengthConversion<Self::Number> + PercentageConversion<Self::Number>>( &self, _conversion: &Conversion, ) -> Self::Number

fn from_raw_css_for_var_expression_evaluation( value: &str, _is_not_in_page_rule: bool, ) -> Option<Self>

fn to_canonical_dimension(self) -> Self

fn number_inside_calc_function<'i>( value: f32, ) -> Result<Either<CalculablePropertyValue<Self>, CalcExpression<Self>>, ParseError<'i, CustomParseError<'i>>>

impl UpperExp for CssSignedNumber

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

Formats the value using the given formatter.

impl Copy for CssSignedNumber

impl Eq for CssSignedNumber