Dan Zheng f9c5d7ae6c [AutoDiff] Derive Differentiable.zeroTangentVectorInitializer. (#31823) ...

`Differentiable` conformance derivation now supports
`Differentiable.zeroTangentVectorInitializer`.

There are two potential cases:
1. Memberwise derivation: done when `TangentVector` can be initialized memberwise.
2. `{ TangentVector.zero }` derivation: done as a fallback.

`zeroTangentVectorInitializer` is a closure that produces a zero tangent vector,
capturing minimal necessary information from `self`.

It is an instance property, unlike the static property `AdditiveArithmetic.zero`,
and should be used by the differentiation transform for correctness.

Remove `Differentiable.zeroTangentVectorInitializer` dummy default implementation.

Update stdlib `Differentiable` conformances and tests.
Clean up DerivedConformanceDifferentiable.cpp cruft.

Resolves TF-1007.
Progress towards TF-1008: differentiation correctness for projection operations.

2020-05-29 01:59:52 -07:00

..

Inputs

[AutoDiff] Derive Differentiable.zeroTangentVectorInitializer. (#31823)

2020-05-29 01:59:52 -07:00

main.swift

actually set the lazy resolver

2020-04-07 15:05:27 -07:00