Struct re_types::datatypes::Float32

#[repr(transparent)]
pub struct Float32(pub f32);

Datatype: A single-precision 32-bit IEEE 754 floating point number.

Tuple Fields

0: f32

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

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 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 Borrow<Float32> for AxisLength

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for ColumnShare

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for DepthMeter

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for DrawOrder

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for FillRatio

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for GammaCorrection

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for ImagePlaneDistance

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for Length

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for MarkerSize

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for Opacity

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for Radius

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for RowShare

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Borrow<Float32> for StrokeWidth

fn borrow(&self) -> &Float32

Immutably borrows from an owned value.

impl Clone for Float32

fn clone(&self) -> Float32

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Float32

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

Formats the value using the given formatter.

impl Default for Float32

fn default() -> Float32

Returns the “default value” for a type.

impl Deref for Float32

type Target = f32

The resulting type after dereferencing.

fn deref(&self) -> &f32

Dereferences the value.

impl DerefMut for Float32

fn deref_mut(&mut self) -> &mut f32

Mutably dereferences the value.

impl Display for Float32

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

Formats the value using the given formatter.

impl From<Float32> for f32

fn from(value: Float32) -> f32

Converts to this type from the input type.

impl From<f32> for Float32

fn from(value: f32) -> Float32

Converts to this type from the input type.

impl Loggable for Float32

type Name = DatatypeName

fn name() -> <Float32 as Loggable>::Name

The fully-qualified name of this loggable, e.g. rerun.datatypes.Vec2D.

fn arrow_datatype() -> DataType

The underlying [arrow2::datatypes::DataType], excluding datatype extensions.

fn to_arrow_opt<'a>( data: impl IntoIterator<Item = Option<impl Into<Cow<'a, Float32>>>> ) -> Result<Box<dyn Array>, SerializationError>

where Float32: 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 + 'static) ) -> Result<Vec<Option<Float32>>, DeserializationError>

where Float32: Sized,

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

fn from_arrow( arrow_data: &(dyn Array + 'static) ) -> Result<Vec<Float32>, DeserializationError>

where Float32: Sized,

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

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

where Self: 'a,

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

impl PartialEq for Float32

fn eq(&self, other: &Float32) -> 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 PartialOrd for Float32

fn partial_cmp(&self, other: &Float32) -> Option<Ordering>

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

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl SizeBytes for Float32

fn heap_size_bytes(&self) -> u64

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

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 Float32

fn zeroed() -> Self

Calls zeroed.

impl Copy for Float32

impl Pod for Float32

impl StructuralPartialEq for Float32