Enum LayoutStabilityGrade 

#[repr(u8)]
pub enum LayoutStabilityGrade {
    Stable = 0,
    Evolving = 1,
    MigrationSensitive = 2,
    UnsafeToEvolve = 3,
}

How safe it is to evolve a layout over time.

Computed from field intents, segment roles, and mutation classes to help builders understand whether their layout design invites future migration pain or stays safely extensible.

Variants

Stable = 0

Layout is safe to extend indefinitely (append-only fields, stable core).

Evolving = 1

Layout is actively evolving but changes are managed.

MigrationSensitive = 2

Layout has fields or segments that make migration risky.

UnsafeToEvolve = 3

Layout design makes future evolution dangerous. Refactor recommended.

Implementations

impl LayoutStabilityGrade

pub const fn name(self) -> &'static str

Human-readable name.

pub fn compute(manifest: &LayoutManifest) -> Self

Compute the stability grade for a layout manifest.

Heuristic: counts authority-sensitive fields, financial fields, and checks whether field ordering invites migration pain.

Trait Implementations

impl Clone for LayoutStabilityGrade

fn clone(&self) -> LayoutStabilityGrade

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LayoutStabilityGrade

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

Formats the value using the given formatter.

impl Display for LayoutStabilityGrade

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

Formats the value using the given formatter.

impl PartialEq for LayoutStabilityGrade

fn eq(&self, other: &LayoutStabilityGrade) -> 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 LayoutStabilityGrade

impl Eq for LayoutStabilityGrade

impl StructuralPartialEq for LayoutStabilityGrade