#[repr(C, align(4))]pub struct WireF32(pub f32);
Expand description
A wire-encoded f32
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
1.62.0 · Sourcepub fn total_cmp(&self, other: &f32) -> Ordering
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§
Source§impl AddAssign<&WireF32> for WireF32
impl AddAssign<&WireF32> for WireF32
Source§fn add_assign(&mut self, other: &WireF32)
fn add_assign(&mut self, other: &WireF32)
Performs the
+=
operation. Read moreSource§impl AddAssign<&f32> for WireF32
impl AddAssign<&f32> for WireF32
Source§fn add_assign(&mut self, other: &f32)
fn add_assign(&mut self, other: &f32)
Performs the
+=
operation. Read moreSource§impl AddAssign<f32> for WireF32
impl AddAssign<f32> for WireF32
Source§fn add_assign(&mut self, other: f32)
fn add_assign(&mut self, other: f32)
Performs the
+=
operation. Read moreSource§impl AddAssign for WireF32
impl AddAssign for WireF32
Source§fn add_assign(&mut self, other: WireF32)
fn add_assign(&mut self, other: WireF32)
Performs the
+=
operation. Read moreSource§impl DivAssign<&WireF32> for WireF32
impl DivAssign<&WireF32> for WireF32
Source§fn div_assign(&mut self, other: &WireF32)
fn div_assign(&mut self, other: &WireF32)
Performs the
/=
operation. Read moreSource§impl DivAssign<&f32> for WireF32
impl DivAssign<&f32> for WireF32
Source§fn div_assign(&mut self, other: &f32)
fn div_assign(&mut self, other: &f32)
Performs the
/=
operation. Read moreSource§impl DivAssign<f32> for WireF32
impl DivAssign<f32> for WireF32
Source§fn div_assign(&mut self, other: f32)
fn div_assign(&mut self, other: f32)
Performs the
/=
operation. Read moreSource§impl DivAssign for WireF32
impl DivAssign for WireF32
Source§fn div_assign(&mut self, other: WireF32)
fn div_assign(&mut self, other: WireF32)
Performs the
/=
operation. Read moreSource§impl Encodable for WireF32
impl Encodable for WireF32
Source§const COPY_OPTIMIZATION: CopyOptimization<Self>
const COPY_OPTIMIZATION: CopyOptimization<Self>
An optimization flag that allows the bytes of this type to be copied directly during
encoding instead of calling
encode
. Read moreSource§impl EncodableOption for WireF32
impl EncodableOption for WireF32
Source§type EncodedOption = WireBox<WireF32>
type EncodedOption = WireBox<WireF32>
The wire type for the optional value.
Source§impl<E: Encoder + ?Sized> EncodeOption<E> for WireF32
impl<E: Encoder + ?Sized> EncodeOption<E> for WireF32
Source§fn encode_option(
this: Option<&mut Self>,
encoder: &mut E,
slot: Slot<'_, Self::EncodedOption>,
) -> Result<(), EncodeError>
fn encode_option( this: Option<&mut Self>, encoder: &mut E, slot: Slot<'_, Self::EncodedOption>, ) -> Result<(), EncodeError>
Encodes this optional value into an encoder and slot.
Source§impl FromBytes for WireF32where
f32: FromBytes,
impl FromBytes for WireF32where
f32: FromBytes,
Source§impl IntoBytes for WireF32
impl IntoBytes for WireF32
§fn as_mut_bytes(&mut self) -> &mut [u8] ⓘwhere
Self: FromBytes,
fn as_mut_bytes(&mut self) -> &mut [u8] ⓘwhere
Self: FromBytes,
Gets the bytes of this value mutably. Read more
Source§impl MulAssign<&WireF32> for WireF32
impl MulAssign<&WireF32> for WireF32
Source§fn mul_assign(&mut self, other: &WireF32)
fn mul_assign(&mut self, other: &WireF32)
Performs the
*=
operation. Read moreSource§impl MulAssign<&f32> for WireF32
impl MulAssign<&f32> for WireF32
Source§fn mul_assign(&mut self, other: &f32)
fn mul_assign(&mut self, other: &f32)
Performs the
*=
operation. Read moreSource§impl MulAssign<f32> for WireF32
impl MulAssign<f32> for WireF32
Source§fn mul_assign(&mut self, other: f32)
fn mul_assign(&mut self, other: f32)
Performs the
*=
operation. Read moreSource§impl MulAssign for WireF32
impl MulAssign for WireF32
Source§fn mul_assign(&mut self, other: WireF32)
fn mul_assign(&mut self, other: WireF32)
Performs the
*=
operation. Read moreSource§impl PartialOrd<f32> for WireF32
impl PartialOrd<f32> for WireF32
Source§impl PartialOrd for WireF32
impl PartialOrd for WireF32
Source§impl RemAssign<&WireF32> for WireF32
impl RemAssign<&WireF32> for WireF32
Source§fn rem_assign(&mut self, other: &WireF32)
fn rem_assign(&mut self, other: &WireF32)
Performs the
%=
operation. Read moreSource§impl RemAssign<&f32> for WireF32
impl RemAssign<&f32> for WireF32
Source§fn rem_assign(&mut self, other: &f32)
fn rem_assign(&mut self, other: &f32)
Performs the
%=
operation. Read moreSource§impl RemAssign<f32> for WireF32
impl RemAssign<f32> for WireF32
Source§fn rem_assign(&mut self, other: f32)
fn rem_assign(&mut self, other: f32)
Performs the
%=
operation. Read moreSource§impl RemAssign for WireF32
impl RemAssign for WireF32
Source§fn rem_assign(&mut self, other: WireF32)
fn rem_assign(&mut self, other: WireF32)
Performs the
%=
operation. Read moreSource§impl SubAssign<&WireF32> for WireF32
impl SubAssign<&WireF32> for WireF32
Source§fn sub_assign(&mut self, other: &WireF32)
fn sub_assign(&mut self, other: &WireF32)
Performs the
-=
operation. Read moreSource§impl SubAssign<&f32> for WireF32
impl SubAssign<&f32> for WireF32
Source§fn sub_assign(&mut self, other: &f32)
fn sub_assign(&mut self, other: &f32)
Performs the
-=
operation. Read moreSource§impl SubAssign<f32> for WireF32
impl SubAssign<f32> for WireF32
Source§fn sub_assign(&mut self, other: f32)
fn sub_assign(&mut self, other: f32)
Performs the
-=
operation. Read moreSource§impl SubAssign for WireF32
impl SubAssign for WireF32
Source§fn sub_assign(&mut self, other: WireF32)
fn sub_assign(&mut self, other: WireF32)
Performs the
-=
operation. Read moreSource§impl TakeFrom<WireF32> for WireF32
impl TakeFrom<WireF32> for WireF32
Source§const COPY_OPTIMIZATION: CopyOptimization<Self>
const COPY_OPTIMIZATION: CopyOptimization<Self>
An optimization flag that allows the bytes of this type to be copied directly during
conversion instead of calling
take_from
. Read moreSource§impl TakeFrom<WireF32> for f32
impl TakeFrom<WireF32> for f32
Source§const COPY_OPTIMIZATION: CopyOptimization<Self>
const COPY_OPTIMIZATION: CopyOptimization<Self>
An optimization flag that allows the bytes of this type to be copied directly during
conversion instead of calling
take_from
. Read moreSource§impl TryFromBytes for WireF32where
f32: TryFromBytes,
impl TryFromBytes for WireF32where
f32: TryFromBytes,
§fn try_read_from_bytes(
source: &[u8],
) -> Result<Self, ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
fn try_read_from_bytes(
source: &[u8],
) -> Result<Self, ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
§fn try_read_from_prefix(
source: &[u8],
) -> Result<(Self, &[u8]), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
fn try_read_from_prefix(
source: &[u8],
) -> Result<(Self, &[u8]), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
§fn try_read_from_suffix(
source: &[u8],
) -> Result<(&[u8], Self), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
fn try_read_from_suffix(
source: &[u8],
) -> Result<(&[u8], Self), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>where
Self: Sized,
Source§impl ZeroPadding for WireF32
impl ZeroPadding for WireF32
Source§unsafe fn zero_padding(_: *mut Self)
unsafe fn zero_padding(_: *mut Self)
Writes zeroes to the padding for this type, if any. Read more
impl Copy for WireF32
impl Eq for WireF32
Auto Trait Implementations§
impl Freeze for WireF32
impl RefUnwindSafe for WireF32
impl Send for WireF32
impl Sync for WireF32
impl Unpin for WireF32
impl UnwindSafe for WireF32
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more