swift

d4e951ef - [AutoDiff] Support `wrt` clause for `@differentiating` attribute. (#23370)

[AutoDiff] Support `wrt` clause for `@differentiating` attribute. (#23370) - Add `AutoDiffParameterIndices` to `DifferentiatingAttr`. - Implement parsing/type-checking/serialization for `wrt` clauses. - Unify code with `@differentiable` attribute for: - Parsing `wrt` clauses. - Diagnosing errors in `wrt` clauses. - Building `AutoDiffParameterIndices` from `ArrayRef<ParsedAutoDiffParameter>`. - Verifying `AutoDiffParameterIndices`. - Add tests.