Enum FpCategory

pub enum FpCategory {
    Nan,
    Infinite,
    Zero,
    Subnormal,
    Normal,
}

A classification of floating point numbers.

This enum is used as the return type for f32::classify and f64::classify. See their documentation for more.

Examples

use std::num::FpCategory;

let num = 12.4_f32;
let inf = f32::INFINITY;
let zero = 0f32;
let sub: f32 = 1.1754942e-38;
let nan = f32::NAN;

assert_eq!(num.classify(), FpCategory::Normal);
assert_eq!(inf.classify(), FpCategory::Infinite);
assert_eq!(zero.classify(), FpCategory::Zero);
assert_eq!(sub.classify(), FpCategory::Subnormal);
assert_eq!(nan.classify(), FpCategory::Nan);

Variants

Nan

NaN (not a number): this value results from calculations like (-1.0).sqrt().

See the documentation for f32 for more information on the unusual properties of NaN.