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// org id Robvmv7MKVA9nhridLr+yEw9Z+03849XIXfaIMnJ8jI=
use super::change_id::*;
use super::vertex::*;

bitflags! {
/// Possible flags of edges.
#[derive(Serialize, Deserialize)]
pub struct EdgeFlags: u8 {
const BLOCK = 1;
/// A pseudo-edge, computed when applying the change to
/// restore connectivity, and/or mark conflicts.
const PSEUDO = 4;
/// An edge encoding file system hierarchy.
const FOLDER = 16;
/// A "reverse" edge (all edges in the graph have a reverse edge).
const PARENT = 32;
/// An edge whose target (if not also `PARENT`) or
/// source (if also `PARENT`) is marked as deleted.
const DELETED = 128;
}
}

/// The target half of an edge in the repository graph.
#[derive(Clone, Copy, Debug, PartialEq, PartialOrd, Eq, Ord, Hash)]
#[doc(hidden)]
pub struct Edge {
    /// Flags of this edge.
    pub flag: EdgeFlags,
    /// Target of this edge.
    pub dest: Position<ChangeId>,
    /// Change that introduced this edge (possibly as a
    /// pseudo-edge, i.e. not explicitly in the change, but
    /// computed from it).
    pub introduced_by: ChangeId,
}