Struct ArenaPageRef 

pub struct ArenaPageRef {
    pub page_index: u32,
    pub arena_off: u32,
    pub len: u32,
}

One non-zero page of a DataDesc: logical page page_index is backed by the arena window arena[arena_off .. arena_off + len], zero-padded to PAGE_SIZE when materialized. len (1..=PAGE_SIZE) stores only the page’s meaningful prefix — trailing zeros within the page are dropped, so a sub-page-dense region costs len bytes, not a full page. Windows are packed tightly (no arena_off alignment). Pages not named by any ArenaPageRef are the canonical zero page (PageSlot::Empty).

Named distinctly from the cap-layer PageRef = Arc<PageBytes>: this is a wire descriptor (offsets), not a refcounted runtime page.

Fields

page_index: u32

arena_off: u32

len: u32

Trait Implementations

impl Clone for ArenaPageRef

fn clone(&self) -> ArenaPageRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArenaPageRef

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

Formats the value using the given formatter.

impl Decode for ArenaPageRef

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length.

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. Variable-length types return [BYTES_PER_LENGTH_OFFSET].

fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError>

Decode a full instance from bytes, rejecting trailing input.

impl Encode for ArenaPageRef

fn is_ssz_fixed_len() -> bool

true iff this type is fixed-length (no variable-length fields).

fn ssz_fixed_len() -> usize

Number of bytes this type occupies in the fixed-length portion of a container encoding. For variable-length types this returns [BYTES_PER_LENGTH_OFFSET] (i.e. the size of the offset slot).

fn ssz_bytes_len(&self) -> usize

Total size of self when serialized.

fn ssz_append(&self, buf: &mut Vec<u8>)

Append the encoding of self to buf.

fn is_basic_type() -> bool

true for “basic” SSZ types (uintN, bool), which pack adjacent elements into shared 32-byte chunks for merkleization. Composite types (containers, lists, structs) return false (the default).

fn as_ssz_bytes(&self) -> Vec<u8>

Serialize into a fresh Vec<u8> allocated through the global allocator.

impl HashTreeRoot for ArenaPageRef

fn hash_tree_root<__D: Digest<OutputSize = U32>>(&self) -> [u8; 32]

Compute the hash tree root using D as the underlying hash.

impl PartialEq for ArenaPageRef

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

impl Eq for ArenaPageRef

impl StructuralPartialEq for ArenaPageRef