Enum fixed_decimal::RoundingMode

#[non_exhaustive]
pub enum RoundingMode {
    Ceil,
    Expand,
    Floor,
    Trunc,
    HalfCeil,
    HalfExpand,
    HalfFloor,
    HalfTrunc,
    HalfEven,
}

Mode used in a rounding operation.

Comparative table of rounding modes

Value	Ceil	Expand	Floor	Trunc	HalfCeil	HalfExpand	HalfFloor	HalfTrunc	HalfEven
+1.8	+2	+2	+1	+1	+2	+2	+2	+2	+2
+1.5	“	“	“	“	“	“	+1	+1	“
+1.2	“	“	“	“	+1	+1	“	“	+1
+0.8	+1	+1	0	0	“	“	“	“	“
+0.5	“	“	“	“	“	“	0	0	0
+0.2	“	“	“	“	0	0	“	“	“
-0.2	0	-1	-1	“	“	“	“	“	“
-0.5	“	“	“	“	“	-1	-1	“	“
-0.8	“	“	“	“	-1	“	“	-1	-1
-1.2	-1	-2	-2	-1	“	“	“	“	“
-1.5	“	“	“	“	“	-2	-2	“	-2
-1.8	“	“	“	“	-2	“	“	-2	“

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Ceil

Round up, or towards positive infinity.

Expand

Round away from zero, or towards infinity.

Floor

Round down, or towards negative infinity.

Trunc

Round towards zero, or away from infinity.

HalfCeil

Round to the nearest integer, resolving ties by rounding up.

HalfExpand

Round to the nearest integer, resolving ties by rounding away from zero.

HalfFloor

Round to the nearest integer, resolving ties by rounding down.

HalfTrunc

Round to the nearest integer, resolving ties by rounding towards zero.

HalfEven

Round to the nearest integer, resolving ties by rounding towards the nearest even integer.

Trait Implementations

impl Clone for RoundingMode

fn clone(&self) -> RoundingMode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for RoundingMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Ord for RoundingMode

fn cmp(&self, other: &RoundingMode) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for RoundingMode

fn eq(&self, other: &RoundingMode) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for RoundingMode

fn partial_cmp(&self, other: &RoundingMode) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for RoundingMode

impl Eq for RoundingMode

impl StructuralPartialEq for RoundingMode