Trait FloatConst

pub trait FloatConst {
    const HALF: Self;
    const E: Self;
    const PI: Self;
    const THREE: Self;
    const TWOPI: Self;
    const FOURPI: Self;
    const POINT_TWO: Self;
    const FRAC_1_SQRT_2: Self;
}

constant values for floating point data types

Required Associated Constants

const HALF: Self

0.5

const E: Self

e

const PI: Self

π

const THREE: Self

3.0

const TWOPI: Self

2π

const FOURPI: Self

4π

const POINT_TWO: Self

0.2

const FRAC_1_SQRT_2: Self

1/√2

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FloatConst for f32

const HALF: Self = 0.5f32

const E: Self = 2.71828175f32

const PI: Self = 3.14159274f32

const THREE: Self = 3f32

const TWOPI: Self = 6.28318548f32

const FOURPI: Self = 12.566371f32

const POINT_TWO: Self = 0.200000003f32

const FRAC_1_SQRT_2: Self = 0.707106769f32

impl FloatConst for f64

const HALF: Self = 0.5f64

const E: Self = 2.7182818284590451f64

const PI: Self = 3.1415926535897931f64

const THREE: Self = 3f64

const TWOPI: Self = 6.2831853071795862f64

const FOURPI: Self = 12.566370614359172f64

const POINT_TWO: Self = 0.20000000000000001f64

const FRAC_1_SQRT_2: Self = 0.70710678118654757f64

impl FloatConst for bf16

const HALF: Self

const E: Self

const PI: Self

const THREE: Self

const TWOPI: Self

const FOURPI: Self

const POINT_TWO: Self

const FRAC_1_SQRT_2: Self

impl FloatConst for f16

const HALF: Self

const E: Self

const PI: Self

const THREE: Self

const TWOPI: Self

const FOURPI: Self

const POINT_TWO: Self

const FRAC_1_SQRT_2: Self

Implementors