Enum StructMode 

pub enum StructMode {
    Sparse,
    Dense,
    Packed,
}

How a struct’s fields are stored.

Variants

Sparse

Presence bitmap + a fixed slot for every field, present or not (canonical kind byte 0). Best general default.

Dense

No bitmap; every field always present and mandatory (kind byte 2). Smallest and fastest for records with no optionality.

Packed

Presence bitmap + slots for present fields only, packed in size-class order (kind byte 3). Field offsets are recovered in O(1) with popcount rank queries over the bitmap — sparse-data sizes without per-object vtables and without giving up zero-copy. At most 64 fields.

Trait Implementations

impl Clone for StructMode

fn clone(&self) -> StructMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StructMode

impl Debug for StructMode

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

Formats the value using the given formatter.

impl Eq for StructMode

impl PartialEq for StructMode

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StructMode