Struct Decimal 

pub struct Decimal { /* private fields */ }

An exact decimal number units · 10^−scale – a price per unit, a quantity, a rate. Money is crate::Money.

A value has one form only: the smallest scale (units not divisible by ten unless the scale is 0), written as a string in exactly one way ("1.5", never "1.50"; "0", never "-0"). Reading rejects any other form, so the same value always has the same bytes and the same hash. Addition and subtraction are exact; rounding is a rule of the law that applies, not of the protocol.

Implementations

impl Decimal

pub const MAX_SCALE: u8 = 18

The most decimal places a number may have.

pub const ZERO: Decimal

Zero.

pub fn new(units: i128, scale: u8) -> Option<Self>

units · 10^−scale, reduced to its one form; None if the scale is above Self::MAX_SCALE.

pub fn scale(self) -> u8

The number of decimal places.

pub fn is_zero(self) -> bool

Whether the value is zero.

pub fn is_negative(self) -> bool

Whether the value is below zero.

pub fn checked_add(self, other: Self) -> Option<Self>

The exact sum, or None on overflow.

pub fn checked_sub(self, other: Self) -> Option<Self>

The exact difference, or None on overflow.

Trait Implementations

impl Clone for Decimal

fn clone(&self) -> Decimal

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Decimal

impl Debug for Decimal

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Decimal

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Display for Decimal

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

Formats the value using the given formatter.

impl Eq for Decimal

impl FromStr for Decimal

type Err = ParseError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Decimal

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Neg for Decimal

fn neg(self) -> Decimal

The same value with the opposite sign.

type Output = Decimal

The resulting type after applying the - operator.

impl Ord for Decimal

fn cmp(&self, other: &Self) -> 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,

Restrict a value to a certain interval.

impl PartialEq for Decimal

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Decimal

fn partial_cmp(&self, other: &Self) -> 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 Serialize for Decimal

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Decimal