Struct HistoryEntry 

pub struct HistoryEntry {
    pub expression: String,
    pub result: f64,
    pub timestamp: u64,
}

A single entry in the calculation history

Fields

expression: String

The expression that was evaluated

result: f64

The result of the calculation

timestamp: u64

Timestamp of when the calculation was performed (Unix epoch millis)

Implementations

impl HistoryEntry

pub fn new(expression: String, result: f64) -> Self

Creates a new history entry

pub fn with_timestamp(expression: String, result: f64, timestamp: u64) -> Self

Creates a history entry with a specific timestamp (for testing)

pub fn display(&self) -> String

Returns a formatted display string

Trait Implementations

impl Clone for HistoryEntry

fn clone(&self) -> HistoryEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryEntry

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HistoryEntry

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for HistoryEntry

fn eq(&self, other: &HistoryEntry) -> 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 Serialize for HistoryEntry

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for HistoryEntry