Enum rug::float::Round
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pub enum Round { Nearest, Zero, Up, Down, AwayFromZero, }
The rounding methods for floating-point values.
When rounding to the nearest, if the number to be rounded is exactly between two representable numbers, it is rounded to the even one, that is, the one with the least significant bit set to zero.
Examples
use rug::Float; use rug::float::Round; use rug::ops::AssignRound; let mut f4 = Float::new(4); f4.assign_round(10.4, Round::Nearest); assert_eq!(f4, 10); f4.assign_round(10.6, Round::Nearest); assert_eq!(f4, 11); f4.assign_round(-10.7, Round::Zero); assert_eq!(f4, -10); f4.assign_round(10.3, Round::AwayFromZero); assert_eq!(f4, 11);
Rounding to the nearest will round numbers exactly between two representable numbers to the even one.
use rug::Float; use rug::float::Round; use rug::ops::AssignRound; // 24 is 11000 in binary // 25 is 11001 in binary // 26 is 11010 in binary // 27 is 11011 in binary // 28 is 11100 in binary let mut f4 = Float::new(4); f4.assign_round(25, Round::Nearest); assert_eq!(f4, 24); f4.assign_round(27, Round::Nearest); assert_eq!(f4, 28);
Variants
Nearest
Round towards the nearest.
Zero
Round towards zero.
Up
Round towards plus infinity.
Down
Round towards minus infinity.
AwayFromZero
Round away from zero.
Trait Implementations
impl Clone for Round
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fn clone(&self) -> Round
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Copy for Round
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impl Debug for Round
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impl Eq for Round
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impl Hash for Round
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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
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Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl Ord for Round
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fn cmp(&self, __arg_0: &Round) -> Ordering
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This method returns an Ordering
between self
and other
. Read more
fn max(self, other: Self) -> Self
1.22.0[src]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.22.0[src]
Compares and returns the minimum of two values. Read more
impl PartialEq for Round
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fn eq(&self, __arg_0: &Round) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests for !=
.
impl PartialOrd for Round
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fn partial_cmp(&self, __arg_0: &Round) -> Option<Ordering>
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This method returns an ordering between self
and other
values if one exists. Read more
fn lt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
fn le(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
fn gt(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
fn ge(&self, other: &Rhs) -> bool
1.0.0[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more