Trait IndexElement 

pub trait IndexElement:
    DeviceRepr
    + Sealed
    + Copy
    + 'static {
    const KIND: IndexElementKind;
}

Sealed marker trait for index-element types accepted by the indexing / embedding / segment kernel families.

Phase 11.5 (Fuel team feedback #7): split out as a sibling of Element so plans like [crate::indexing::GatherPlan] / [crate::embedding::EmbeddingPlan] / [crate::segment::SegmentSumPlan] can dispatch over the index dtype without coupling the value-dtype trait hierarchy. Today’s members are i32 (legacy) and i64 (PyTorch default). Sealed because new members require a matching FFI entry point in the *-kernels-sys crate.

Required Associated Constants

const KIND: IndexElementKind

Runtime tag for this index element type.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl IndexElement for i32

const KIND: IndexElementKind = IndexElementKind::I32

impl IndexElement for i64

const KIND: IndexElementKind = IndexElementKind::I64

Implementors