Struct SubgroupStreamType 

pub struct SubgroupStreamType(u8);

Subgroup stream type byte (§10.4.2, Table 7).

The 12 defined types encode four independent boolean fields in the low nibble:

• bit 0 (0x01) — Extensions Present
• bit 1 (0x02) — Subgroup ID derives from first Object ID (only meaningful when bit 2 is clear)
• bit 2 (0x04) — Subgroup ID Field Present (explicit Subgroup ID varint)
• bit 3 (0x08) — Contains End of Group

Tuple Fields

0: u8

Implementations

impl SubgroupStreamType

pub fn as_u8(self) -> u8

The raw wire byte.

pub fn from_u8(v: u8) -> Option<Self>

Create a SubgroupStreamType from its raw byte, validating that it is one of the 12 defined values in Table 7.

pub fn from_flags( subgroup_id_field_present: bool, subgroup_id_is_first_object: bool, extensions_present: bool, end_of_group: bool, ) -> Self

Build a subgroup stream type from its component flags.

subgroup_id_is_first_object and subgroup_id_field_present are mutually exclusive — if both are set, the resulting type has the “Subgroup ID Field Present” bit set (bit 2 wins).

pub fn has_subgroup_id_field(self) -> bool

True if the header carries an explicit Subgroup ID varint.

pub fn subgroup_id_is_first_object(self) -> bool

True if the subgroup ID is defined to equal the first Object ID in the stream (applies only when Self::has_subgroup_id_field is false).

pub fn extensions_present(self) -> bool

True if every object in the stream carries extension headers.

pub fn contains_end_of_group(self) -> bool

True if the last object on the stream (prior to FIN) is the end of its group.

Trait Implementations

impl Clone for SubgroupStreamType

fn clone(&self) -> SubgroupStreamType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SubgroupStreamType

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

Formats the value using the given formatter.

impl PartialEq for SubgroupStreamType

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

impl Eq for SubgroupStreamType

impl StructuralPartialEq for SubgroupStreamType