Enum Role 

pub enum Role {
    Router,
    LmHead,
    Embedding,
    Attention,
    Expert,
    SharedExpert,
    Norm,
}

2026-09-25: Semantic role of a tensor, used for precision lookups. Adding a role means extending the matches in Role::name, Role::from_str and PrecisionSchedule::dtype_for.

Variants

Router

2026-09-25: MoE router gate (hidden × num_experts).

LmHead

2026-09-25: Final unembedding (hidden × vocab).

Embedding

2026-09-25: Token embedding (vocab × hidden).

Attention

2026-09-25: Attention Q/K/V/O projection.

Expert

2026-09-25: Expert FFN (gate / up / down per expert).

SharedExpert

2026-09-25: Shared-expert FFN, when the model has one.

Norm

2026-09-25: Layer norm scales (RMSNorm weight).

Implementations

impl Role

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

pub fn from_str(s: &str) -> Option<Self>

2026-09-25: Parse a role tag (the inverse of name). Returns None for an unknown name.

Trait Implementations

impl Clone for Role

fn clone(&self) -> Role

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Role

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

Formats the value using the given formatter.

impl Hash for Role

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Role

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

impl Eq for Role

impl StructuralPartialEq for Role