Trait fixnum::ops::RoundingSqrt[−][src]

pub trait RoundingSqrt: Sized {
    type Error;
    fn rsqrt(self, mode: RoundMode) -> Result<Self, Self::Error>;
}

Associated Types

Required methods

Checked rounding square root. Returns Err for negative argument.

ⓘ
use fixnum::{ArithmeticError, FixedPoint, typenum::U9};
use fixnum::ops::{Zero, RoundingSqrt, RoundMode::*};

type Amount = FixedPoint<i64, U9>;

let a: Amount = "81".parse()?;
let b: Amount = "2".parse()?;
let c: Amount = "-100".parse()?;
assert_eq!(a.rsqrt(Floor)?, "9".parse()?);
assert_eq!(b.rsqrt(Floor)?, "1.414213562".parse()?);
assert_eq!(b.rsqrt(Ceil)?, "1.414213563".parse()?);
assert_eq!(c.rsqrt(Floor), Err(ArithmeticError::DomainViolation));

Implementations on Foreign Types

Implementors