dashu_float::round

Trait Round

Source 
pub trait Round: Copy {
    type Reverse: Round;

    // Required method
    fn round_low_part<F: FnOnce() -> Ordering>(
        integer: &IBig,
        low_sign: Sign,
        low_half_test: F,
    ) -> Rounding;

    // Provided methods
    fn round_fract<const B: Word>(
        integer: &IBig,
        fract: IBig,
        precision: usize,
    ) -> Rounding { ... }
    fn round_ratio(integer: &IBig, num: IBig, den: &IBig) -> Rounding { ... }
}
Expand description

A trait describing the rounding strategy

Required Associated Types§

Source

type Reverse: Round

The rounding operation that rounds to an opposite direction

Required Methods§

Source

fn round_low_part<F: FnOnce() -> Ordering>( integer: &IBig, low_sign: Sign, low_half_test: F, ) -> Rounding

Calculate the rounding of the number (integer + rem), assuming rem != 0 and |rem| < 1. low_half_test should tell |rem|.cmp(0.5)

Provided Methods§

Source

fn round_fract<const B: Word>( integer: &IBig, fract: IBig, precision: usize, ) -> Rounding

Calculate the rounding of the number (integer + fract / X^precision), assuming |fract| / X^precision < 1. Return the adjustment.

Source

fn round_ratio(integer: &IBig, num: IBig, den: &IBig) -> Rounding

Calculate the rounding of the number (integer + numerator / denominator), assuming |numerator / denominator| < 1. Return the adjustment.

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.

Implementors§