PyTorch Internals 11 - Operator Schema, Dispatch Keys, and Meta Functions
A custom operator is not complete until its schema, dispatch behavior, and meta-level shape logic are defined clearly
Why schema comes first
An operator is not just an implementation. It is also:
- an input/output contract
- aliasing and mutation semantics
- dispatch behavior
- sometimes shape inference through a meta path
That is especially important once compile paths enter the picture.
The next post looks at backward implementation patterns.