[6.0 🍒][Compile Time Constant Extraction] Query nominal type conformances to get at the protocols, instead of getAllProtocols.
#74713
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… get at the protocols, instead of `getAllProtocols`. As it stands, for extension macros which add protocol conformances, the list of protocols specified on the macro's 'conformances:' parameter gets added in its entirety to the list of a nominal type's protocols in 'ConformanceLookupTable::addMacroGeneratedProtocols'. Whereas the macro itself, may only add *some* of the specified conformances. This means that `getAllProtocols` may contain a super-set of protocols captured in `getAllConformances`, some of which may not actually be generated by the macro. This change narrowly fixes ConstExtract to query actual generated conformances. Though, potentially we should make 'ConformanceLookupTable::addMacroGeneratedProtocols' behave in a way that reflects the protocols the macro actually adds the conformances to, instead of the ones it may add conformances to. Resolves rdar:https://130316531
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nkcsgexi
approved these changes
Jun 25, 2024
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Cherry-pick of #74698
Explanation: As it stands, for extension macros which add protocol conformances, the list of protocols specified on the macro's 'conformances:' parameter gets added in its entirety to the list of a nominal type's protocols in 'ConformanceLookupTable::addMacroGeneratedProtocols'. Whereas the macro itself, may only add some of the specified conformances. This means that
getAllProtocolsmay contain a super-set of protocols captured ingetAllConformances, some of which may not actually be generated by the macro.This change narrowly fixes ConstExtract to query actual generated conformances. Though, potentially we should make 'ConformanceLookupTable::addMacroGeneratedProtocols' behave in a way that reflects the protocols the macro actually adds the conformances to, instead of the ones it may add conformances to.
Risk: Low. This change affects the compile-time metadata extraction code-path and only affects the produced set of conformances by using a stricter way to gather them than before.
Testing: Automated test added to the compiler test suite.
Resolves rdar:https://130316531