uni_store/storage/
direction.rs

1// SPDX-License-Identifier: Apache-2.0
2// Copyright 2024-2026 Dragonscale Team
3
4//! Graph edge traversal direction.
5
6/// Edge traversal direction for adjacency lookups.
7#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
8pub enum Direction {
9    /// Outgoing (forward) edges from a vertex.
10    Outgoing,
11    /// Incoming (backward) edges to a vertex.
12    Incoming,
13    /// Both outgoing and incoming edges.
14    Both,
15}
16
17impl Direction {
18    /// Returns the short string representation used in storage keys.
19    pub fn as_str(&self) -> &'static str {
20        match self {
21            Direction::Outgoing => "fwd",
22            Direction::Incoming => "bwd",
23            Direction::Both => "both",
24        }
25    }
26
27    /// Expands `Both` into `[Outgoing, Incoming]`; otherwise returns a
28    /// single-element slice containing the direction itself.
29    pub fn expand(&self) -> &'static [Direction] {
30        match self {
31            Direction::Both => &[Direction::Outgoing, Direction::Incoming],
32            Direction::Outgoing => &[Direction::Outgoing],
33            Direction::Incoming => &[Direction::Incoming],
34        }
35    }
36}
uni_store/storage/direction.rs

uni_store/storage/
direction.rs
