Struct dashu::float::round::mode::Down

pub struct Down;

Round toward -∞

Trait Implementations

impl Clone for Down

fn clone(&self) -> Down

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl ErrorBounds for Down

fn error_bounds<const B: u64>( f: &FBig<Down, B>, ) -> (FBig<Down, B>, FBig<Down, B>, bool, bool)

Given a floating point number f, the output (L, R, incl_L, incl_R) represents the relative error range with left bound f - L and right bound f + R. The two boolean values incl_L and incl_R represents whether the bounds f - L and f + R are inclusive respectively.

impl Round for Down

type Reverse = Up

The rounding operation that rounds to an opposite direction

fn round_low_part<F>( _integer: &IBig, low_sign: Sign, _low_half_test: F, ) -> Rounding

where F: FnOnce() -> Ordering,

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

fn round_fract<const B: u64>( 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.

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.

impl Copy for Down