// SPDX-License-Identifier: Apache-2.0

// SPDX-FileCopyrightText: Copyright the Vortex contributors

//! Aggregate function vtable machinery.

//!

//! This module contains the [`AggregateFnVTable`] trait, the [`Accumulator`] trait, and the

//! type-erasure infrastructure for aggregate functions.

use vortex_session::registry::Id;

mod accumulator;

pub use accumulator::*;

mod accumulator_grouped;

pub use accumulator_grouped::*;

mod vtable;

pub use vtable::*;

mod plugin;

pub use plugin::*;

mod foreign;

pub(crate) use foreign::*;

mod typed;

pub use typed::*;

mod erased;

pub use erased::*;

mod options;

pub use options::*;

pub mod fns;

pub mod kernels;

pub mod proto;

pub mod session;

/// A unique identifier for an aggregate function.

pub type AggregateFnId = Id;

/// Private module to seal [`typed::DynAggregateFn`].

mod sealed {

use crate::aggregate_fn::AggregateFnVTable;

use crate::aggregate_fn::typed::AggregateFnInner;

/// Marker trait to prevent external implementations of [`super::typed::DynAggregateFn`].

pub(crate) trait Sealed {}

/// This can be the **only** implementor for [`super::typed::DynAggregateFn`].

impl<V: AggregateFnVTable> Sealed for AggregateFnInner<V> {}

}