Enum LayoutBackend 

pub enum LayoutBackend {
    Sugiyama,
    Native,
    LayeredLegacy,
}

Selects which layered-layout backend computes node positions.

Default since 0.17.0: Sugiyama.

• Sugiyama — ascii-dag-backed layout with proper crossing minimisation, long-edge dummy node insertion, and Brandes-Köpf coordinate assignment. Produces cleaner results on acyclic flowcharts, dependency graphs, and state diagrams. Supports subgraphs, parallel-edge widening, and per-subgraph direction overrides. This is the default as of 0.17.0.

• Native — the in-house layered layout. Stable, fast, and respects every feature we ship. Available as an explicit opt-out if you need the legacy spacing contract.

• LayeredLegacy — deprecated alias for Native. Provided as a discoverable escape hatch for callers who relied on the old default behaviour. Will be removed in 0.18.0.

Variants

Sugiyama

ascii-dag-backed Sugiyama layout — proper crossing minimisation, dummy node insertion, and Brandes-Köpf coordinate assignment. This is the default since 0.17.0.

Native

Native in-house layered layout.

LayeredLegacy

👎Deprecated since 0.17.0:

LayeredLegacy is an alias for Native and will be removed in 0.18.0. Use LayoutBackend::Native to keep the old layered layout, or remove the explicit backend field to get the new Sugiyama default.

Deprecated alias for [Native]. Will be removed in 0.18.0.

If you depended on the pre-0.17.0 default (the in-house layered layout), replace this with LayoutBackend::Native. If you are simply omitting backend from your RenderOptions, the new default (Sugiyama) will be used automatically.

Trait Implementations

impl Clone for LayoutBackend

fn clone(&self) -> LayoutBackend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LayoutBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LayoutBackend

fn default() -> Self

Returns LayoutBackend::Sugiyama — the new default since 0.17.0.

impl PartialEq for LayoutBackend

fn eq(&self, other: &LayoutBackend) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for LayoutBackend

impl Eq for LayoutBackend

impl StructuralPartialEq for LayoutBackend