reifydb-flow 0.9.0

Flow execution substrate: the flow transaction/state layer and the operator contract
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// Copyright (c) 2026 ReifyDB

pub mod rolling;
pub mod session;
pub mod sliding;
pub mod tumbling;

use reifydb_value::value::datetime::DateTime;

use crate::{operator::state::seal::coord::Coord, window::span::WindowSpan};

pub fn ordinal_window_span(window_id: u64) -> WindowSpan<DateTime> {
	WindowSpan::new(<DateTime as Coord>::from_order(window_id), <DateTime as Coord>::from_order(window_id + 1))
}

#[cfg(test)]
mod tests {
	use super::*;

	#[test]
	fn an_ordinal_span_is_exactly_one_unit_wide_and_never_empty() {
		// The engine keys everything by WindowSpan<DateTime>, so an ordinal rides inside a span that is
		// only compared, never measured. A zero-width span collapses under the engine's half-open
		// [start, end) comparisons and adjacent ordinals alias onto one another.
		for window_id in [0u64, 1, 41, 1_000_000_000_000] {
			let span = ordinal_window_span(window_id);
			assert!(span.start < span.end, "ordinal {window_id} produced an empty span");
			assert_ne!(span, ordinal_window_span(window_id + 1));
		}
	}
}