Struct ReducerSpec 

pub struct ReducerSpec {
    pub column: String,
    pub kind: ReducerKind,
}

A reducer as written, with its column given as text.

Fields

column: String

Stat column name, or a bare vector or histogram label for its magnitude or total.

kind: ReducerKind

Fold the reducer applies.

Implementations

impl ReducerSpec

pub fn check_label(&self, stats: &[StatDescriptor]) -> Result<(), ReducerError>

Checks the column against the stat labels a model declares.

A column passes when it is a label, or a label followed by . and a component. ReducerPlan::bind checks the column again once a build provides the full column list.

Errors

Returns ReducerError::UnknownColumn for a column that does not start with a stat label.

Trait Implementations

impl Clone for ReducerSpec

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 ReducerSpec

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

Formats the value using the given formatter.

impl FromStr for ReducerSpec

fn from_str(raw: &str) -> Result<Self, Self::Err>

Reads COLUMN:KIND, split at the last :.

type Err = ReducerError

The associated error which can be returned from parsing.

impl PartialEq for ReducerSpec

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ReducerSpec