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Return a copy for enum-typed members, during member-access via references #3357

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merged 1 commit into from
May 17, 2024

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SupunS
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@SupunS SupunS commented May 17, 2024

Closes #3355

Description

Enums are immutable, so returning a copy during member access via references is safe.


  • Targeted PR against master branch
  • Linked to Github issue with discussion and accepted design OR link to spec that describes this work
  • Code follows the standards mentioned here
  • Updated relevant documentation
  • Re-reviewed Files changed in the Github PR explorer
  • Added appropriate labels

@SupunS SupunS self-assigned this May 17, 2024
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Cadence Benchstat comparison

This branch with compared with the base branch onflow:master commit e837800
The command for i in {1..N}; do go test ./... -run=XXX -bench=. -benchmem -shuffle=on; done was used.
Bench tests were run a total of 7 times on each branch.

Collapsed results for better readability

old.txtnew.txt
time/opdelta
DecodeBatchEventsCCF-4127ms ± 0%128ms ± 0%~(p=1.000 n=1+1)
DecodeBatchEventsJSON-4399ms ± 0%398ms ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowFees.FeesDeducted-47.12µs ± 0%2.85µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowFees.TokensWithdrawn-42.10µs ± 0%2.13µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-42.77µs ± 0%2.93µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-43.14µs ± 0%3.11µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowIDTableStaking.NewWeeklyPayout-42.25µs ± 0%2.17µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowIDTableStaking.RewardsPaid-42.48µs ± 0%2.51µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowToken.TokensDeposited-42.55µs ± 0%2.58µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowToken.TokensDeposited_with_nil_receiver-42.47µs ± 0%2.51µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowToken.TokensMinted-42.12µs ± 0%2.12µs ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowToken.TokensWithdrawn-42.65µs ± 0%2.64µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowFees.FeesDeducted-49.91µs ± 0%10.08µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowFees.TokensWithdrawn-45.73µs ± 0%5.74µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-49.08µs ± 0%8.97µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-412.2µs ± 0%12.2µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowIDTableStaking.NewWeeklyPayout-45.95µs ± 0%5.91µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowIDTableStaking.RewardsPaid-47.55µs ± 0%7.56µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowToken.TokensDeposited-47.97µs ± 0%7.92µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowToken.TokensDeposited_with_nil_receiver-47.08µs ± 0%7.15µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowToken.TokensMinted-45.77µs ± 0%5.86µs ± 0%~(p=1.000 n=1+1)
DecodeJSON/FlowToken.TokensWithdrawn-47.85µs ± 0%7.86µs ± 0%~(p=1.000 n=1+1)
EncodeBatchEventsCCF-492.3ms ± 0%301.5ms ± 0%~(p=1.000 n=1+1)
EncodeBatchEventsJSON-4108ms ± 0%109ms ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowFees.FeesDeducted-42.03µs ± 0%2.10µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowFees.TokensWithdrawn-41.61µs ± 0%1.63µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-41.97µs ± 0%1.99µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-42.28µs ± 0%2.35µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowIDTableStaking.NewWeeklyPayout-41.63µs ± 0%1.66µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowIDTableStaking.RewardsPaid-41.79µs ± 0%1.80µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowToken.TokensDeposited-41.85µs ± 0%1.89µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowToken.TokensDeposited_with_nil_receiver-41.82µs ± 0%1.85µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowToken.TokensMinted-41.60µs ± 0%1.62µs ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowToken.TokensWithdrawn-41.85µs ± 0%1.89µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowFees.FeesDeducted-42.56µs ± 0%2.60µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowFees.TokensWithdrawn-41.48µs ± 0%1.50µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-42.30µs ± 0%2.30µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-43.24µs ± 0%3.21µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowIDTableStaking.NewWeeklyPayout-41.51µs ± 0%1.51µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowIDTableStaking.RewardsPaid-41.96µs ± 0%1.96µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowToken.TokensDeposited-42.23µs ± 0%2.24µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowToken.TokensDeposited_with_nil_receiver-41.76µs ± 0%1.76µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowToken.TokensMinted-41.49µs ± 0%1.50µs ± 0%~(p=1.000 n=1+1)
EncodeJSON/FlowToken.TokensWithdrawn-42.20µs ± 0%2.21µs ± 0%~(p=1.000 n=1+1)
ExportType/composite_type-4280ns ± 0%279ns ± 0%~(p=1.000 n=1+1)
ExportType/simple_type-470.3ns ± 0%70.2ns ± 0%~(p=1.000 n=1+1)
InterpretRecursionFib-42.21ms ± 0%2.21ms ± 0%~(p=1.000 n=1+1)
NewInterpreter/new_interpreter-4925ns ± 0%919ns ± 0%~(p=1.000 n=1+1)
NewInterpreter/new_sub-interpreter-4464ns ± 0%459ns ± 0%~(p=1.000 n=1+1)
ParseArray-46.06ms ± 0%6.10ms ± 1%~(p=0.667 n=2+2)
ParseDeploy/byte_array-49.46ms ± 3%9.17ms ± 0%~(p=0.667 n=2+2)
ParseDeploy/decode_hex-41.02ms ± 1%1.01ms ± 0%~(p=0.333 n=2+2)
ParseFungibleToken/With_memory_metering-4151µs ± 4%151µs ± 2%~(p=1.000 n=2+2)
ParseFungibleToken/Without_memory_metering-4118µs ± 3%117µs ± 3%~(p=0.667 n=2+2)
ParseInfix-45.29µs ± 0%5.31µs ± 1%~(p=1.000 n=2+2)
QualifiedIdentifierCreation/One_level-42.48ns ± 0%2.50ns ± 0%~(p=1.000 n=1+1)
QualifiedIdentifierCreation/Three_levels-484.6ns ± 0%88.3ns ± 0%~(p=1.000 n=1+1)
RuntimeScriptNoop-43.71µs ± 0%3.67µs ± 0%~(p=1.000 n=1+1)
SuperTypeInference/arrays-4247ns ± 0%249ns ± 0%~(p=1.000 n=1+1)
SuperTypeInference/composites-487.4ns ± 0%87.4ns ± 0%~(p=1.000 n=1+1)
SuperTypeInference/integers-4314ns ± 0%316ns ± 0%~(p=1.000 n=1+1)
ValueIsSubtypeOfSemaType-482.0ns ± 0%81.5ns ± 0%~(p=1.000 n=1+1)
 
alloc/opdelta
DecodeBatchEventsCCF-466.5MB ± 0%66.5MB ± 0%~(all equal)
DecodeBatchEventsJSON-4244MB ± 0%244MB ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowFees.FeesDeducted-41.40kB ± 0%1.40kB ± 0%~(all equal)
DecodeCCF/FlowFees.TokensWithdrawn-41.21kB ± 0%1.21kB ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-41.48kB ± 0%1.48kB ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-41.49kB ± 0%1.49kB ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.NewWeeklyPayout-41.26kB ± 0%1.26kB ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.RewardsPaid-41.38kB ± 0%1.38kB ± 0%~(all equal)
DecodeCCF/FlowToken.TokensDeposited-41.32kB ± 0%1.32kB ± 0%~(all equal)
DecodeCCF/FlowToken.TokensDeposited_with_nil_receiver-41.30kB ± 0%1.30kB ± 0%~(all equal)
DecodeCCF/FlowToken.TokensMinted-41.21kB ± 0%1.21kB ± 0%~(all equal)
DecodeCCF/FlowToken.TokensWithdrawn-41.33kB ± 0%1.33kB ± 0%~(all equal)
DecodeJSON/FlowFees.FeesDeducted-46.00kB ± 0%6.00kB ± 0%~(all equal)
DecodeJSON/FlowFees.TokensWithdrawn-43.60kB ± 0%3.60kB ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-45.43kB ± 0%5.43kB ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-47.35kB ± 0%7.35kB ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.NewWeeklyPayout-43.64kB ± 0%3.64kB ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.RewardsPaid-44.54kB ± 0%4.54kB ± 0%~(all equal)
DecodeJSON/FlowToken.TokensDeposited-44.88kB ± 0%4.88kB ± 0%~(all equal)
DecodeJSON/FlowToken.TokensDeposited_with_nil_receiver-44.46kB ± 0%4.46kB ± 0%~(all equal)
DecodeJSON/FlowToken.TokensMinted-43.60kB ± 0%3.60kB ± 0%~(all equal)
DecodeJSON/FlowToken.TokensWithdrawn-44.88kB ± 0%4.88kB ± 0%~(all equal)
EncodeBatchEventsCCF-463.9MB ± 0%63.9MB ± 0%~(p=1.000 n=1+1)
EncodeBatchEventsJSON-440.7MB ± 0%40.7MB ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowFees.FeesDeducted-41.25kB ± 0%1.25kB ± 0%~(all equal)
EncodeCCF/FlowFees.TokensWithdrawn-41.20kB ± 0%1.20kB ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-41.47kB ± 0%1.47kB ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-41.44kB ± 0%1.44kB ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.NewWeeklyPayout-41.38kB ± 0%1.38kB ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.RewardsPaid-41.46kB ± 0%1.46kB ± 0%~(all equal)
EncodeCCF/FlowToken.TokensDeposited-41.25kB ± 0%1.25kB ± 0%~(all equal)
EncodeCCF/FlowToken.TokensDeposited_with_nil_receiver-41.23kB ± 0%1.23kB ± 0%~(all equal)
EncodeCCF/FlowToken.TokensMinted-41.20kB ± 0%1.20kB ± 0%~(all equal)
EncodeCCF/FlowToken.TokensWithdrawn-41.25kB ± 0%1.25kB ± 0%~(all equal)
EncodeJSON/FlowFees.FeesDeducted-4896B ± 0%896B ± 0%~(all equal)
EncodeJSON/FlowFees.TokensWithdrawn-4536B ± 0%536B ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-4920B ± 0%920B ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-41.11kB ± 0%1.11kB ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.NewWeeklyPayout-4584B ± 0%584B ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.RewardsPaid-4784B ± 0%784B ± 0%~(all equal)
EncodeJSON/FlowToken.TokensDeposited-4808B ± 0%808B ± 0%~(all equal)
EncodeJSON/FlowToken.TokensDeposited_with_nil_receiver-4672B ± 0%672B ± 0%~(all equal)
EncodeJSON/FlowToken.TokensMinted-4544B ± 0%544B ± 0%~(all equal)
EncodeJSON/FlowToken.TokensWithdrawn-4800B ± 0%800B ± 0%~(all equal)
ExportType/composite_type-4120B ± 0%120B ± 0%~(all equal)
ExportType/simple_type-40.00B 0.00B ~(all equal)
InterpretRecursionFib-41.19MB ± 0%1.19MB ± 0%~(p=1.000 n=1+1)
NewInterpreter/new_interpreter-4944B ± 0%944B ± 0%~(all equal)
NewInterpreter/new_sub-interpreter-4200B ± 0%200B ± 0%~(all equal)
ParseArray-42.68MB ± 1%2.71MB ± 0%~(p=0.333 n=2+2)
ParseDeploy/byte_array-44.16MB ± 2%4.22MB ± 0%~(p=0.667 n=2+2)
ParseDeploy/decode_hex-4214kB ± 0%214kB ± 0%~(p=1.000 n=2+2)
ParseFungibleToken/With_memory_metering-429.6kB ± 0%29.6kB ± 0%~(p=0.667 n=2+2)
ParseFungibleToken/Without_memory_metering-429.6kB ± 0%29.6kB ± 0%~(p=0.667 n=2+2)
ParseInfix-41.92kB ± 0%1.92kB ± 0%~(p=1.000 n=2+2)
QualifiedIdentifierCreation/One_level-40.00B 0.00B ~(all equal)
QualifiedIdentifierCreation/Three_levels-464.0B ± 0%64.0B ± 0%~(all equal)
RuntimeScriptNoop-43.37kB ± 0%3.37kB ± 0%~(all equal)
SuperTypeInference/arrays-496.0B ± 0%96.0B ± 0%~(all equal)
SuperTypeInference/composites-40.00B 0.00B ~(all equal)
SuperTypeInference/integers-40.00B 0.00B ~(all equal)
ValueIsSubtypeOfSemaType-448.0B ± 0%48.0B ± 0%~(all equal)
 
allocs/opdelta
DecodeBatchEventsCCF-41.48M ± 0%1.48M ± 0%~(all equal)
DecodeBatchEventsJSON-44.70M ± 0%4.70M ± 0%~(p=1.000 n=1+1)
DecodeCCF/FlowFees.FeesDeducted-430.0 ± 0%30.0 ± 0%~(all equal)
DecodeCCF/FlowFees.TokensWithdrawn-426.0 ± 0%26.0 ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-430.0 ± 0%30.0 ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-432.0 ± 0%32.0 ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.NewWeeklyPayout-426.0 ± 0%26.0 ± 0%~(all equal)
DecodeCCF/FlowIDTableStaking.RewardsPaid-429.0 ± 0%29.0 ± 0%~(all equal)
DecodeCCF/FlowToken.TokensDeposited-431.0 ± 0%31.0 ± 0%~(all equal)
DecodeCCF/FlowToken.TokensDeposited_with_nil_receiver-429.0 ± 0%29.0 ± 0%~(all equal)
DecodeCCF/FlowToken.TokensMinted-426.0 ± 0%26.0 ± 0%~(all equal)
DecodeCCF/FlowToken.TokensWithdrawn-431.0 ± 0%31.0 ± 0%~(all equal)
DecodeJSON/FlowFees.FeesDeducted-4126 ± 0%126 ± 0%~(all equal)
DecodeJSON/FlowFees.TokensWithdrawn-471.0 ± 0%71.0 ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-4102 ± 0%102 ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-4159 ± 0%159 ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.NewWeeklyPayout-470.0 ± 0%70.0 ± 0%~(all equal)
DecodeJSON/FlowIDTableStaking.RewardsPaid-487.0 ± 0%87.0 ± 0%~(all equal)
DecodeJSON/FlowToken.TokensDeposited-495.0 ± 0%95.0 ± 0%~(all equal)
DecodeJSON/FlowToken.TokensDeposited_with_nil_receiver-486.0 ± 0%86.0 ± 0%~(all equal)
DecodeJSON/FlowToken.TokensMinted-471.0 ± 0%71.0 ± 0%~(all equal)
DecodeJSON/FlowToken.TokensWithdrawn-495.0 ± 0%95.0 ± 0%~(all equal)
EncodeBatchEventsCCF-41.00M ± 0%1.00M ± 0%~(p=1.000 n=1+1)
EncodeBatchEventsJSON-4902k ± 0%902k ± 0%~(p=1.000 n=1+1)
EncodeCCF/FlowFees.FeesDeducted-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowFees.TokensWithdrawn-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.DelegatorRewardsPaid-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.EpochTotalRewardsPaid-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.NewWeeklyPayout-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowIDTableStaking.RewardsPaid-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowToken.TokensDeposited-421.0 ± 0%21.0 ± 0%~(all equal)
EncodeCCF/FlowToken.TokensDeposited_with_nil_receiver-421.0 ± 0%21.0 ± 0%~(all equal)
EncodeCCF/FlowToken.TokensMinted-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeCCF/FlowToken.TokensWithdrawn-421.0 ± 0%21.0 ± 0%~(all equal)
EncodeJSON/FlowFees.FeesDeducted-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeJSON/FlowFees.TokensWithdrawn-413.0 ± 0%13.0 ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.DelegatorRewardsPaid-417.0 ± 0%17.0 ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.EpochTotalRewardsPaid-426.0 ± 0%26.0 ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.NewWeeklyPayout-413.0 ± 0%13.0 ± 0%~(all equal)
EncodeJSON/FlowIDTableStaking.RewardsPaid-416.0 ± 0%16.0 ± 0%~(all equal)
EncodeJSON/FlowToken.TokensDeposited-420.0 ± 0%20.0 ± 0%~(all equal)
EncodeJSON/FlowToken.TokensDeposited_with_nil_receiver-415.0 ± 0%15.0 ± 0%~(all equal)
EncodeJSON/FlowToken.TokensMinted-414.0 ± 0%14.0 ± 0%~(all equal)
EncodeJSON/FlowToken.TokensWithdrawn-419.0 ± 0%19.0 ± 0%~(all equal)
ExportType/composite_type-43.00 ± 0%3.00 ± 0%~(all equal)
ExportType/simple_type-40.00 0.00 ~(all equal)
InterpretRecursionFib-418.9k ± 0%18.9k ± 0%~(all equal)
NewInterpreter/new_interpreter-415.0 ± 0%15.0 ± 0%~(all equal)
NewInterpreter/new_sub-interpreter-44.00 ± 0%4.00 ± 0%~(all equal)
ParseArray-459.6k ± 0%59.6k ± 0%~(p=1.000 n=2+2)
ParseDeploy/byte_array-489.4k ± 0%89.4k ± 0%~(p=0.333 n=2+2)
ParseDeploy/decode_hex-463.0 ± 0%63.0 ± 0%~(all equal)
ParseFungibleToken/With_memory_metering-4773 ± 1%773 ± 1%~(p=1.000 n=2+2)
ParseFungibleToken/Without_memory_metering-4773 ± 1%773 ± 1%~(p=1.000 n=2+2)
ParseInfix-448.0 ± 0%48.0 ± 0%~(all equal)
QualifiedIdentifierCreation/One_level-40.00 0.00 ~(all equal)
QualifiedIdentifierCreation/Three_levels-42.00 ± 0%2.00 ± 0%~(all equal)
RuntimeScriptNoop-451.0 ± 0%51.0 ± 0%~(all equal)
SuperTypeInference/arrays-43.00 ± 0%3.00 ± 0%~(all equal)
SuperTypeInference/composites-40.00 0.00 ~(all equal)
SuperTypeInference/integers-40.00 0.00 ~(all equal)
ValueIsSubtypeOfSemaType-41.00 ± 0%1.00 ± 0%~(all equal)
 

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Nice, thank your for picking this up!

Great to see it was easy to change 👌

@turbolent turbolent added Language Breaking Change Breaks Cadence contracts deployed on Mainnet Improvement and removed Improvement labels May 17, 2024
@SupunS SupunS merged commit 96cf17a into master May 17, 2024
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@SupunS SupunS deleted the supun/improve-member-access branch May 17, 2024 16:28
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Access of enum-typed field on reference should maybe return non-reference
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