Richard Wei 57d228b39e [AutoDiff upstream] Add differential operators and some utilities. ...

* Add all [differential operators](https://github.com/apple/swift/blob/master/docs/DifferentiableProgramming.md#list-of-differential-operators).
* Add `withoutDerivative(at:)`, used for efficiently stopping the derivative propagation at a value and causing the derivative at the value to be zero.
* Add utility `differentiableFunction(from:)`, used for creating a `@differentiable` function from an original function and a derivative function.

Mostly work done by @marcrasi and @dan-zheng.
Partially resolves TF-843.

TODO:
* Add `AnyDerivative`.
* Add `Array.differentiableMap(_:)` and `differentiableReduce(_:_:)`.

2020-03-30 14:15:35 -07:00

11 KiB

Raw Blame History

View Raw