Trait UmbraExtension 

pub trait UmbraExtension: Copy + 'static {
    const TAG: u8;
}

Marker trait for user-defined extension types stored in SharedUmbraPointer’s reserved bytes. Each implementor declares a unique TAG so different consumers don’t misinterpret each other’s payloads.

Implementor responsibility

TAG MUST be globally unique across all UmbraExtension implementations that may be present in the same shared memory. Two implementations sharing a TAG value will silently misinterpret each other’s payloads. Reserve TAG values in your application by registering them in a central location (e.g. a doc comment listing claimed tags).

TAG 0 is reserved for “no extension set”.

Required Associated Constants

const TAG: u8

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors