Trait rug::ops::AddFromRound[][src]

pub trait AddFromRound<Lhs = Self> {
    type Round;
    type Ordering;
    fn add_from_round(&mut self, lhs: Lhs, round: Self::Round) -> Self::Ordering;
}

Compound addition and assignment to the rhs operand with a specified rounding method.

Examples

use core::cmp::Ordering;
use rug::{
    float::Round,
    ops::{AddAssignRound, AddFromRound},
    Float,
};
struct F(f64);
impl AddFromRound<f64> for F {
    type Round = Round;
    type Ordering = Ordering;
    fn add_from_round(&mut self, lhs: f64, round: Round) -> Ordering {
        let mut f = Float::with_val(53, lhs);
        let dir = f.add_assign_round(self.0, round);
        self.0 = f.to_f64();
        dir
    }
}
let mut f = F(5.0);
let dir = f.add_from_round(3.0, Round::Nearest);
// 3.0 + 5.0 = 8.0
assert_eq!(f.0, 8.0);
assert_eq!(dir, Ordering::Equal);

Associated Types

type Round[src]

The rounding method.

type Ordering[src]

The direction from rounding.

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Required methods

fn add_from_round(&mut self, lhs: Lhs, round: Self::Round) -> Self::Ordering[src]

Performs the addition.

Examples

use core::cmp::Ordering;
use rug::{float::Round, ops::AddFromRound, Float};
// only four significant bits
let mut f = Float::with_val(4, -0.3);
let dir = f.add_from_round(-3, Round::Nearest);
// −3.3 rounded up to −3.25
assert_eq!(f, -3.25);
assert_eq!(dir, Ordering::Greater);
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Implementors

impl AddFromRound<&'_ f32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ f32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ f64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ f64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ i8> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ i8> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ i16> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ i16> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ i32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ i32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ i64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ i64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ i128> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ i128> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ u8> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ u8> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ u16> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ u16> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ u32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ u32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ u64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ u64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ u128> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ u128> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ Complex> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ Float> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ Float> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ Integer> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ Integer> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<&'_ Rational> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<&'_ Rational> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<f32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<f32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<f64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<f64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<i8> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<i8> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<i16> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<i16> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<i32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<i32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<i64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<i64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<i128> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<i128> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<u8> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<u8> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<u16> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<u16> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<u32> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<u32> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<u64> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<u64> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<u128> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<u128> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<Complex> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<Float> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<Float> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<Integer> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<Integer> for Float[src]

type Round = Round

type Ordering = Ordering

impl AddFromRound<Rational> for Complex[src]

type Round = (Round, Round)

type Ordering = (Ordering, Ordering)

impl AddFromRound<Rational> for Float[src]

type Round = Round

type Ordering = Ordering

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