Enum SegmentRoleHint 

#[repr(u8)]
pub enum SegmentRoleHint {
    Core = 0,
    Extension = 1,
    Journal = 2,
    Index = 3,
    Cache = 4,
    Audit = 5,
    Shard = 6,
    Unclassified = 7,
}

Segment role classification for migration (mirrors hopper-core SegmentRole).

This is a schema-level copy so hopper-schema can reason about roles without depending on internal details of hopper-core’s segment module.

Variants

Core = 0

Extension = 1

Journal = 2

Index = 3

Cache = 4

Audit = 5

Shard = 6

Unclassified = 7

Implementations

impl SegmentRoleHint

pub fn from_flags(flags: u16) -> Self

Decode role from the upper 4 bits of a segment flags field.

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

Human-readable name.

pub fn must_preserve(self) -> bool

Whether data in this segment must survive migration unchanged.

pub fn is_rebuildable(self) -> bool

Whether the segment can be zeroed and rebuilt from other on-chain state.

pub fn is_clearable(self) -> bool

Whether the segment can be cleared during migration.

pub fn is_append_only(self) -> bool

Whether the segment is append-only (no in-place mutations).

pub fn is_immutable(self) -> bool

Whether the segment is immutable after initialization (Audit logs).

pub fn requires_migration_copy(self) -> bool

Whether this segment’s data must be copied during migration.

Core and Audit segments contain irreplaceable state that cannot be rebuilt or cleared. Their bytes must survive migration intact.

pub fn is_safe_to_drop(self) -> bool

Whether this segment can be safely dropped (zeroed) without data loss.

Cache segments hold derived/computed values that can be rebuilt from other on-chain state. Dropping them is always safe.

Trait Implementations

impl Clone for SegmentRoleHint

fn clone(&self) -> SegmentRoleHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SegmentRoleHint

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

Formats the value using the given formatter.

impl PartialEq for SegmentRoleHint

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

impl Eq for SegmentRoleHint

impl StructuralPartialEq for SegmentRoleHint