[AutoDiff] Update @differentiable
attribute API/ABI status.
#28148
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Mark
@differentiable
attribute as:@differentiable
declaration is unaffected.)This is an experiment regarding #27506 (comment).
Context: the
(ABI|API)(Stable|Breaking)To(Add|Remove)
tags were added in #27180 and became relevant for@differentiable
during theswift-DEVELOPMENT-SNAPSHOT-2019-09-16-a -> tensorflow
merge.At the time, few attributes used
Breaking
(final
,frozen
,_fixed_layout
). The previous default wasStable
, so we used it for@differentiable
. IfBreaking
is used,swift-api-digester
diagnoses API/ABI-breaking attribute additions/removals in the stdlib, which may cause issues. Verifying now.