Enum CellValue 

pub enum CellValue {
    Num(u64),
    Bool(bool),
    Text(String),
    Date(i64),
    Err(u8),
}

The dataflow encoding of a cell value.

Differential-dataflow data must be Ord + Eq + Hash + Clone + 'static and exchange-safe. f64 is none of the first three, so numbers ride as their bit pattern; the other variants make Text / Boolean / Error first-class in the dataflow (the non-numeric value lane). Numbers stay the fast path.

Variants

Num(u64)

A number, as f64::to_bits() (total order via f64::total_cmp at the boundary; bit order is fine for equality/hashing/exchange).

Bool(bool)

Text(String)

Date(i64)

A UTC timestamp as milliseconds since the Unix epoch. i64 keeps the value totally-ordered/Hash/Ord for the DD lane (unlike a chrono DateTime, which is fine but this avoids a chrono dep in the key type).

Err(u8)

An error value; the u8 is the ValueError kind discriminant so error cells are distinguishable and propagate through operators.

Implementations

impl CellValue

pub fn num(n: f64) -> Self

Wrap an f64.

pub fn as_num(&self) -> Option<f64>

The number this holds, if it is Num.

pub fn from_bool_numeric(b: bool) -> Self

Encode a boolean as the numeric-lane 1.0/0.0 (back-compat with the comparison/logical convention) — used where downstream expects a number.

pub fn from_model_value(v: &Value) -> Option<CellValue>

Convert a model Value into a CellValue for feeding inputs.

Trait Implementations

impl Clone for CellValue

fn clone(&self) -> CellValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CellValue

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CellValue

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for CellValue

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

Formats the value using the given formatter.

impl Eq for CellValue

impl Hash for CellValue

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 Ord for CellValue

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

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for CellValue

fn partial_cmp(&self, other: &CellValue) -> 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 CellValue

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 CellValue