Struct Currency 

pub struct Currency {
    pub gold: u64,
    pub silver: u64,
    pub copper: u64,
}

Three-tier currency: gold, silver, copper. 100 copper = 1 silver, 100 silver = 1 gold.

Fields

gold: u64

silver: u64

copper: u64

Implementations

impl Currency

pub fn new(gold: u64, silver: u64, copper: u64) -> Self

pub fn from_copper(total: u64) -> Self

Create currency from a total copper amount.

pub fn gold(amount: u64) -> Self

Create currency from a gold amount (no silver/copper).

pub fn silver(amount: u64) -> Self

Create currency from a silver amount (normalizes automatically).

pub fn copper(amount: u64) -> Self

Create currency from a copper amount (normalizes automatically).

pub fn zero() -> Self

pub fn normalize(&mut self)

Convert 100 copper → 1 silver, 100 silver → 1 gold.

pub fn to_copper_total(&self) -> u64

Total value expressed in copper.

pub fn has_at_least(&self, amount: &Currency) -> bool

Check if this wallet has at least amount.

pub fn try_subtract(&mut self, amount: &Currency) -> bool

Attempt to subtract amount from this currency. Returns true on success (and modifies self), false if insufficient funds.

pub fn add(&mut self, amount: &Currency)

Add amount to this currency.

pub fn multiply(&self, factor: u32) -> Self

Multiply the currency by a scalar (e.g. for quantity pricing).

pub fn scale(&self, factor: f32) -> Self

Scale by a floating-point factor (for discounts / surcharges).

pub fn is_zero(&self) -> bool

Trait Implementations

impl Clone for Currency

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Currency

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

Formats the value using the given formatter.

impl Default for Currency

fn default() -> Self

Returns the “default value” for a type.

impl Display for Currency

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

Formats the value using the given formatter.

impl Eq for Currency

impl Ord for Currency

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.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Currency

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Currency

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 StructuralPartialEq for Currency