Struct AggregationFn 

pub struct AggregationFn<T> { /* private fields */ }

Custom aggregation function type.

Wraps a function that aggregates a slice of row references into a string representation.

Implementations

impl<T> AggregationFn<T>

pub fn new<F>(f: F) -> Self

where F: Fn(&[&T]) -> String + Send + Sync + 'static,

Creates a new aggregation function.

Parameters

• f: A function that aggregates row references into a string.

Returns

• AggregationFn<T>: A new aggregation function instance.

pub fn aggregate(&self, rows: &[&T]) -> String

Aggregates a list of rows.

Parameters

• rows: A slice of row references to aggregate.

Returns

• String: The aggregated result as a string.

Trait Implementations

impl<T> Debug for AggregationFn<T>

Formats the aggregation function for debug output.

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

Formats the value using the given formatter.