Trait rug::ops::PowFromRound
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[src]
pub trait PowFromRound<Lhs = Self> { type Round; type Ordering; fn pow_from_round(&mut self, lhs: Lhs, round: Self::Round) -> Self::Ordering; }
Compound power operation and assignment to the rhs operand with a specified rounding method.
Examples
use rug::Float; use rug::float::Round; use rug::ops::{PowAssignRound, PowFromRound}; use std::cmp::Ordering; struct F(f64); impl PowFromRound<f64> for F { type Round = Round; type Ordering = Ordering; fn pow_from_round(&mut self, lhs: f64, round: Round) -> Ordering { let mut f = Float::with_val(53, lhs); let dir = f.pow_assign_round(self.0, round); self.0 = f.to_f64(); dir } } let mut f = F(5.0); let dir = f.pow_from_round(3.0, Round::Nearest); // 3.0 ^ 5.0 = 243.0 assert_eq!(f.0, 243.0); assert_eq!(dir, Ordering::Equal);
Associated Types
Required Methods
fn pow_from_round(&mut self, lhs: Lhs, round: Self::Round) -> Self::Ordering
Performs the power operation.
Examples
use rug::Float; use rug::float::Round; use rug::ops::PowFromRound; use std::cmp::Ordering; // only four significant bits let mut f = Float::with_val(4, 5); let dir = f.pow_from_round(-3, Round::Nearest); // -243 rounded up to -240 assert_eq!(f, -240); assert_eq!(dir, Ordering::Greater);
Implementors
impl<'a> PowFromRound<Float> for Float type Round = Round; type Ordering = Ordering;
impl<'a> PowFromRound<&'a Float> for Float type Round = Round; type Ordering = Ordering;
impl PowFromRound<u32> for Float type Round = Round; type Ordering = Ordering;
impl<'t> PowFromRound<&'t u32> for Float type Round = Round; type Ordering = Ordering;
impl PowFromRound<i32> for Float type Round = Round; type Ordering = Ordering;
impl<'t> PowFromRound<&'t i32> for Float type Round = Round; type Ordering = Ordering;
impl PowFromRound<f64> for Float type Round = Round; type Ordering = Ordering;
impl<'t> PowFromRound<&'t f64> for Float type Round = Round; type Ordering = Ordering;
impl PowFromRound<f32> for Float type Round = Round; type Ordering = Ordering;
impl<'t> PowFromRound<&'t f32> for Float type Round = Round; type Ordering = Ordering;
impl<'a> PowFromRound<Complex> for Complex type Round = (Round, Round); type Ordering = (Ordering, Ordering);
impl<'a> PowFromRound<&'a Complex> for Complex type Round = (Round, Round); type Ordering = (Ordering, Ordering);