polars_core/frame/group_by/
expr.rs

1use crate::prelude::*;
2
3pub trait PhysicalAggExpr {
4    #[allow(clippy::ptr_arg)]
5    fn evaluate(&self, df: &DataFrame, groups: &GroupPositions) -> PolarsResult<Series>;
6
7    fn root_name(&self) -> PolarsResult<&PlSmallStr>;
8}