Struct Tick 

#[non_exhaustive]
pub struct Tick {
    pub price: f64,
    pub volume: f64,
    pub timestamp: i64,
}

A single trade tick.

Construction and the limits of its guarantee

The struct is #[non_exhaustive], so code outside this crate cannot build one from a field literal and must go through new, which validates. A tick has no unchecked constructor.

The fields stay public because reading them is by far the common operation and an accessor on each would buy nothing. That does mean a validated value can still be written into an invalid state afterwards, and nothing detects it: the code that consumes this type relies on the constructor’s guarantee rather than re-checking. A mutation is an assertion that the invariants still hold.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

price: f64

Trade price.

volume: f64

Trade size.

timestamp: i64

Trade timestamp (caller-defined epoch / resolution).

Implementations

impl Tick

pub fn new(price: f64, volume: f64, timestamp: i64) -> Result<Self>

Construct a new tick, validating finiteness and non-negativity of volume.

Errors

Returns Error::NonFiniteInput if price or volume is NaN or infinite, or Error::InvalidTick for volume < 0. (Audit finding R14 — previously returned Error::InvalidCandle, which is semantically wrong for a tick.)

Trait Implementations

impl Clone for Tick

fn clone(&self) -> Tick

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Tick

impl Debug for Tick

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

Formats the value using the given formatter.

impl PartialEq for Tick

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Tick