Struct MeterSet 

pub struct MeterSet {
    pub meters: HashMap<MeterKind, u64>,
}

A collection of meter readings, keyed by MeterKind.

Uses HashMap to guarantee no duplicate MeterKind entries. Use MeterSet::insert() to add values - it will accumulate quantities for the same key instead of overwriting.

Fields

meters: HashMap<MeterKind, u64>

Implementations

impl MeterSet

pub fn new() -> Self

Create a new empty MeterSet.

pub fn accumulate( &mut self, kind: MeterKind, quantity: u64, ) -> Result<(), MeterSetError>

Insert or accumulate a meter reading.

If the key already exists, the quantity is added to the existing value. Uses checked_add to prevent u64 overflow.

pub fn get(&self, kind: &MeterKind) -> u64

Get the quantity for a given meter kind. Returns 0 if the key is not present.

Trait Implementations

impl Clone for MeterSet

fn clone(&self) -> MeterSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MeterSet

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

Formats the value using the given formatter.

impl Default for MeterSet

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MeterSet

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MeterSet

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.