Struct xsd_types::value::Double

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pub struct Double(_);

Implementations§

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pub fn is_nan(&self) -> bool

Returns true if this value is NaN.

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pub fn is_finite(&self) -> bool

Returns true if this number is neither infinite nor NaN.

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pub fn is_infinite(&self) -> bool

Returns true if this value is positive infinity or negative infinity, and false otherwise.

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pub fn is_positive(&self) -> bool

Returns true if self has a positive sign, including +0.0, NaNs with positive sign bit and positive infinity.

Note that IEEE 754 doesn’t assign any meaning to the sign bit in case of a NaN, and as Rust doesn’t guarantee that the bit pattern of NaNs are conserved over arithmetic operations, the result of is_positive on a NaN might produce an unexpected result in some cases. See explanation of NaN as a special value for more info.

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pub fn is_negative(&self) -> bool

Returns false if self has a negative sign, including -0.0, NaNs with negative sign bit and negative infinity.

Note that IEEE 754 doesn’t assign any meaning to the sign bit in case of a NaN, and as Rust doesn’t guarantee that the bit pattern of NaNs are conserved over arithmetic operations, the result of is_negative on a NaN might produce an unexpected result in some cases. See explanation of NaN as a special value for more info.

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pub const fn into_f64(self) -> f64

Converts this value into a f64.

Methods from Deref<Target = f64>§

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pub const RADIX: u32 = 2u32

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pub const MANTISSA_DIGITS: u32 = 53u32

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pub const DIGITS: u32 = 15u32

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pub const EPSILON: f64 = 2.2204460492503131E-16f64

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pub const MIN: f64 = -1.7976931348623157E+308f64

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pub const MIN_POSITIVE: f64 = 2.2250738585072014E-308f64

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pub const MAX: f64 = 1.7976931348623157E+308f64

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pub const MIN_EXP: i32 = -1_021i32

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pub const MAX_EXP: i32 = 1_024i32

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pub const MIN_10_EXP: i32 = -307i32

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pub const MAX_10_EXP: i32 = 308i32

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pub const NAN: f64 = NaNf64

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pub const INFINITY: f64 = +Inff64

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pub const NEG_INFINITY: f64 = -Inff64

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pub fn total_cmp(&self, other: &f64) -> 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 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));