Struct Float64 

#[repr(transparent)]
pub struct Float64(pub f64);

Datatype: A double-precision 64-bit IEEE 754 floating point number.

Tuple Fields

0: f64

Methods from Deref<Target = f64>

pub const RADIX: u32 = 2

pub const BITS: u32 = 64

pub const MANTISSA_DIGITS: u32 = 53

pub const DIGITS: u32 = 15

pub const EPSILON: f64 = 2.2204460492503131e-16_f64

pub const MIN: f64 = -1.7976931348623157e+308_f64

pub const MIN_POSITIVE: f64 = 2.2250738585072014e-308_f64

pub const MAX: f64 = 1.7976931348623157e+308_f64

pub const MIN_EXP: i32 = -1021

pub const MAX_EXP: i32 = 1024

pub const MIN_10_EXP: i32 = -307

pub const MAX_10_EXP: i32 = 308

pub const NAN: f64

pub const INFINITY: f64

pub const NEG_INFINITY: f64

pub const MAX_EXACT_INTEGER: i64

pub const MIN_EXACT_INTEGER: i64

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 Borrow<Float64> for AngularSpeed

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for ForceDistance

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for ForceStrength

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for Fps

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for LinearSpeed

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for PlaybackSpeed

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for Scalar

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Borrow<Float64> for ZoomLevel

fn borrow(&self) -> &Float64

Immutably borrows from an owned value.

impl Clone for Float64

fn clone(&self) -> Float64

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Float64

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

Formats the value using the given formatter.

impl Default for Float64

fn default() -> Float64

Returns the “default value” for a type.

impl Deref for Float64

type Target = f64

The resulting type after dereferencing.

fn deref(&self) -> &f64

Dereferences the value.

impl DerefMut for Float64

fn deref_mut(&mut self) -> &mut f64

Mutably dereferences the value.

impl Display for Float64

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

Formats the value using the given formatter.

impl<'a> From<&'a Float64> for Cow<'a, Float64>

fn from(value: &'a Float64) -> Cow<'a, Float64>

Converts to this type from the input type.

impl<'a> From<Float64> for Cow<'a, Float64>

fn from(value: Float64) -> Cow<'a, Float64>

Converts to this type from the input type.

impl From<Float64> for f64

fn from(value: Float64) -> f64

Converts to this type from the input type.

impl From<f16> for Float64

fn from(value: f16) -> Float64

Converts to this type from the input type.

impl From<f32> for Float64

fn from(value: f32) -> Float64

Converts to this type from the input type.

impl From<f64> for Float64

fn from(value: f64) -> Float64

Converts to this type from the input type.

impl From<i16> for Float64

fn from(value: i16) -> Float64

Converts to this type from the input type.

impl From<i32> for Float64

fn from(value: i32) -> Float64

Converts to this type from the input type.

impl From<i8> for Float64

fn from(value: i8) -> Float64

Converts to this type from the input type.

impl From<u16> for Float64

fn from(value: u16) -> Float64

Converts to this type from the input type.

impl From<u32> for Float64

fn from(value: u32) -> Float64

Converts to this type from the input type.

impl From<u8> for Float64

fn from(value: u8) -> Float64

Converts to this type from the input type.

impl Loggable for Float64

fn arrow_datatype() -> DataType

The underlying arrow::datatypes::DataType, excluding datatype extensions.

fn to_arrow_opt<'a>( data: impl IntoIterator<Item = Option<impl Into<Cow<'a, Float64>>>>, ) -> Result<Arc<dyn Array>, SerializationError>

where Float64: Clone + 'a,

Given an iterator of options of owned or reference values to the current Loggable, serializes them into an Arrow array.

fn from_arrow_opt( arrow_data: &dyn Array, ) -> Result<Vec<Option<Float64>>, DeserializationError>

where Float64: Sized,

Given an Arrow array, deserializes it into a collection of optional Loggables.

fn from_arrow( arrow_data: &dyn Array, ) -> Result<Vec<Float64>, DeserializationError>

where Float64: Sized,

Given an Arrow array, deserializes it into a collection of Loggables.

fn arrow_empty() -> Arc<dyn Array>

fn to_arrow<'a>( data: impl IntoIterator<Item = impl Into<Cow<'a, Self>>>, ) -> Result<Arc<dyn Array>, SerializationError>

where Self: 'a,

Given an iterator of owned or reference values to the current Loggable, serializes them into an Arrow array.

fn verify_arrow_array(data: &dyn Array) -> Result<(), DeserializationError>

Verifies that the given Arrow array can be deserialized into a collection of Selfs.

impl PartialEq for Float64

fn eq(&self, other: &Float64) -> 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 Float64

fn partial_cmp(&self, other: &Float64) -> 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 SizeBytes for Float64

fn heap_size_bytes(&self) -> u64

Returns how many bytes self uses on the heap.

fn is_pod() -> bool

Is Self just plain old data?

fn total_size_bytes(&self) -> u64

Returns the total size of self in bytes, accounting for both stack and heap space.

fn stack_size_bytes(&self) -> u64

Returns the total size of self on the stack, in bytes.

impl Zeroable for Float64

fn zeroed() -> Self

Calls zeroed.

impl Copy for Float64

impl Pod for Float64

impl StructuralPartialEq for Float64