[AST] Introduce "all members" query to reduce non-determinism in serialization & interface printing #35523
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The "semantic members" query produces the list of members that can affect the ABI, e.g., of classes. It does not produce the complete list of members suitable for semantic queries.
Introduce an "all members" request to compute all of the members of a given iterable declaration context in stable order. This builds on ABI members so that it will also include, e.g., type aliases synthesized for associated types.
When serializing the members of a nominal type or extension, use `getAllMembers()` instead of `getMembers()` to provide a deterministic ordering. Fixes rdar://63294687.
Use getAllMembers() when printing members to get deterministic ordering.
…uery. The "synthesized" bit of declarations was never serialized, so sorting deserialized declarations was already a no-op. Make it explicitly a no-op to save some work. The fact that we serialize deterministically is what actually fixed the problem here.
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@swift-ci please test |
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@swift-ci please test source compatibility |
nkcsgexi
approved these changes
Jan 21, 2021
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Eliminate some problematic sources of non-determinism involving the ordering of the members within an iterable declaration context. This pull request does a few things in that direction:
hashValue), enums (likeCodingKeys), and type aliases (inferred from associated types).hashValue.The combination of the second and third bullets fixes rdar://63294687, a crash that occurs due to the synthesized
hashValueproperty getting a different vtable slot in the defining module vs. a client module.