Struct Maxset 

pub struct Maxset(pub f64);

Maxset

JSON schema

{
 "type": "number"
}

Tuple Fields

0: f64

Methods from Deref<Target = f64>

pub fn total_cmp(&self, other: &f64) -> 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 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 Clone for Maxset

fn clone(&self) -> Maxset

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Maxset

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

Formats the value using the given formatter.

impl Deref for Maxset

type Target = f64

The resulting type after dereferencing.

fn deref(&self) -> &f64

Dereferences the value.

impl<'de> Deserialize<'de> for Maxset

fn deserialize<__D>( __deserializer: __D, ) -> Result<Maxset, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for Maxset

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

Formats the value using the given formatter.

impl From<f64> for Maxset

fn from(value: f64) -> Maxset

Converts to this type from the input type.

impl FromStr for Maxset

type Err = <f64 as FromStr>::Err

The associated error which can be returned from parsing.

fn from_str(value: &str) -> Result<Maxset, <Maxset as FromStr>::Err>

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

impl PartialEq for Maxset

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Maxset

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Maxset

impl TryFrom<&str> for Maxset

type Error = <f64 as FromStr>::Err

The type returned in the event of a conversion error.

fn try_from(value: &str) -> Result<Maxset, <Maxset as TryFrom<&str>>::Error>

Performs the conversion.

impl TryFrom<String> for Maxset

type Error = <f64 as FromStr>::Err

The type returned in the event of a conversion error.

fn try_from(value: String) -> Result<Maxset, <Maxset as TryFrom<String>>::Error>

Performs the conversion.