swift

8a172051 - [AutoDiff] Requestify `@differentiable` attribute parameter indices. (#28017)

[AutoDiff] Requestify `@differentiable` attribute parameter indices. (#28017) Requestify `@differentiable` attribute parameter indices resolution: `DifferentiableAttributeParameterIndicesRequest`. This is necessary for type-checking `@differentiable` attributes in non-primary files. The previous workaround (`TypeChecker::checkDeclDifferentiableAttributes`) no longer works because `TypeChecker::validateDecl` has been replaced with `InterfaceTypeRequest::evaluate`. Currently, all `@differentiable` attribute type-checking (`AttributeChecker::visitDifferentiableAttr`) has been moved into `DifferentiableAttributeParameterIndicesRequest::evaluate`. In the future, consider splitting `DifferentiableAttributeParameterIndicesRequest` into multiple requests for the following functionality: - `DifferentiableAttr::getJVPFunction` - `DifferentiableAttr::getVJPFunction` - `DifferentiableAttr::getDerivativeGenericSignature`