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// RLX — versatile ML compiler + runtime.
// Copyright (C) 2026 Eugene Hauptmann, Nataliya Kosmyna.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
use anyhow::Result;
use crate::context::FlowCtx;
use crate::stage::FlowStage;
use crate::value::FlowValue;
pub struct RepeatStage {
pub count: usize,
pub stage_for_index: std::sync::Arc<dyn Fn(usize) -> FlowStage + Send + Sync>,
}
impl std::fmt::Debug for RepeatStage {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("RepeatStage")
.field("count", &self.count)
.finish_non_exhaustive()
}
}
impl RepeatStage {
pub fn new(
count: usize,
stage_for_index: impl Fn(usize) -> FlowStage + Send + Sync + 'static,
) -> Self {
Self {
count,
stage_for_index: std::sync::Arc::new(stage_for_index),
}
}
}
impl Clone for RepeatStage {
fn clone(&self) -> Self {
Self {
count: self.count,
stage_for_index: std::sync::Arc::clone(&self.stage_for_index),
}
}
}
impl RepeatStage {
pub fn emit(
&self,
ctx: &mut FlowCtx<'_>,
mut input: Option<FlowValue>,
) -> Result<Option<FlowValue>> {
for i in 0..self.count {
let stage = (self.stage_for_index)(i);
input = stage.emit(ctx, input)?;
}
Ok(input)
}
}