[AutoDiff upstream] AST bits for @differentiable fn ty #28156
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lattner
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Nov 9, 2019
include/swift/AST/Types.h
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nit, but it seems like != would be more natural here than >
lib/AST/ASTDemangler.cpp
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Is there a mangling for these flags? If so, it seems like it should be plumbed in here for the demangler to use.
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We've got some mangling in the tensorflow branch. I will upstream it in a separate PR. There is a ticket for that: https://bugs.swift.org/browse/TF-948
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Adds the AST bits necessary to represent
@differentiableAnyFunctionTypeandSILFunctionType. Plumbs these bits through parsing and printing so that they can be tested. Adds serialization for them.This resolves TF-871.
Intentionally omits any functionality based on these bits to keep this PR small. (e.g. typechecking that the
@differentiableattr is allowed on the types; lowering@differentiableAnyFunctionTypeto the corresponding@differentiableSILFunctionType)