Method eval_loop

src/expr/src/interpret.rs:1012–1027

(
                is_monotonic: bool,
                expr: &mut MirScalarExpr,
                args: &[ColumnSpec<'a>],
                index: usize,
                datum_map: &mut impl FnMut(&MirSc

            ResultSpec::anything()
        } else {
            fn eval_loop<'a>(
                is_monotonic: bool,
                expr: &mut MirScalarExpr,
                args: &[ColumnSpec<'a>],
                index: usize,
                datum_map: &mut impl FnMut(&MirScalarExpr) -> ResultSpec<'a>,
            ) -> ResultSpec<'a> {
                if index >= args.len() {
                    datum_map(expr)
                } else {
                    args[index].range.flat_map(is_monotonic, |datum| {
                        ColumnSpecs::set_argument(expr, index, datum);
                        eval_loop(is_monotonic, expr, args, index + 1, datum_map)
                    })
                }
            }

            let mut fn_expr = MirScalarExpr::CallVariadic {
                func: func.clone(),