pub struct Lux(pub f32);Expand description
Report an estimate of the current illuminance level in lux. The Lux control can only be returned in metadata.
Tuple Fields§
§0: f32Methods 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 = NaNf32
pub const INFINITY: f32 = +Inff32
pub const NEG_INFINITY: f32 = -Inff32
1.62.0 · sourcepub fn total_cmp(&self, other: &f32) -> Ordering
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));