Claude
ff6130bede
Payment model, permits and the three modifiers, default-branch trap, generic and recursive hierarchies, visitor comparison, run-time enforcement, modules. Transcripts from JDK 21, 25 and 27. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01TF9JWFvJSNm6HVzswzZU5a
131 lines
5.7 KiB
Plaintext
131 lines
5.7 KiB
Plaintext
$ javac broken/WalletNotHandled.java (21.0.10+7-Ubuntu-124.04)
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broken/WalletNotHandled.java:10: error: the switch expression does not cover all possible input values
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return switch (p) {
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^
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1 error
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$ javac broken/WalletNotHandled.java (25.0.4.1+1-LTS)
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broken/WalletNotHandled.java:10: error: the switch expression does not cover all possible input values
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return switch (p) {
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^
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1 error
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$ javac broken/WalletNotHandled.java (27+35)
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broken/WalletNotHandled.java:10: error: the switch expression does not cover all possible input values
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return switch (p) {
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^
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missing patterns:
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Wallet _
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1 error
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$ javac broken/NotPermitted.java (21.0.10+7-Ubuntu-124.04)
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broken/NotPermitted.java:5: error: class is not allowed to extend sealed class: Payment (as it is not listed in its 'permits' clause)
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record Cheque(long amount) implements Payment {} // not in the permits clause
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^
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1 error
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$ javac broken/NotPermitted.java (25.0.4.1+1-LTS)
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broken/NotPermitted.java:5: error: class is not allowed to extend sealed class: Payment (as it is not listed in its 'permits' clause)
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record Cheque(long amount) implements Payment {} // not in the permits clause
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^
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1 error
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$ javac broken/NotPermitted.java (27+35)
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broken/NotPermitted.java:5: error: class is not allowed to extend sealed class: Payment (as it is not listed in its 'permits' clause)
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record Cheque(long amount) implements Payment {} // not in the permits clause
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^
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1 error
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$ javac broken/MissingModifier.java (21.0.10+7-Ubuntu-124.04)
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broken/MissingModifier.java:3: error: sealed, non-sealed or final modifiers expected
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class Card implements Payment {} // must say final, sealed or non-sealed
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^
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1 error
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$ javac broken/MissingModifier.java (25.0.4.1+1-LTS)
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broken/MissingModifier.java:3: error: sealed, non-sealed or final modifiers expected
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class Card implements Payment {} // must say final, sealed or non-sealed
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^
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1 error
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$ javac broken/MissingModifier.java (27+35)
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broken/MissingModifier.java:3: error: sealed, non-sealed or final modifiers expected
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class Card implements Payment {} // must say final, sealed or non-sealed
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^
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1 error
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$ javac broken/NoSubclass.java (21.0.10+7-Ubuntu-124.04)
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broken/NoSubclass.java:2: error: sealed class must have subclasses
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sealed interface Payment {} // no permits clause and no subtype in this file
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^
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1 error
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$ javac broken/NoSubclass.java (25.0.4.1+1-LTS)
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broken/NoSubclass.java:2: error: sealed class must have subclasses
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sealed interface Payment {} // no permits clause and no subtype in this file
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^
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1 error
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$ javac broken/NoSubclass.java (27+35)
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broken/NoSubclass.java:2: error: sealed class must have subclasses
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sealed interface Payment {} // no permits clause and no subtype in this file
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^
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1 error
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$ javac broken/NonSealedWrongPlace.java (21.0.10+7-Ubuntu-124.04)
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broken/NonSealedWrongPlace.java:3: error: non-sealed modifier not allowed here
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non-sealed class Oops implements Plain {} // non-sealed only makes sense under a sealed supertype
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^
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(class NonSealedWrongPlace.Oops does not have any sealed supertypes)
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1 error
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$ javac broken/NonSealedWrongPlace.java (25.0.4.1+1-LTS)
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broken/NonSealedWrongPlace.java:3: error: non-sealed modifier not allowed here
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non-sealed class Oops implements Plain {} // non-sealed only makes sense under a sealed supertype
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^
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(class NonSealedWrongPlace.Oops does not have any sealed supertypes)
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1 error
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$ javac broken/NonSealedWrongPlace.java (27+35)
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broken/NonSealedWrongPlace.java:3: error: non-sealed modifier not allowed here
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non-sealed class Oops implements Plain {} // non-sealed only makes sense under a sealed supertype
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^
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(class NonSealedWrongPlace.Oops does not have any sealed supertypes)
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1 error
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$ javac broken/AnonymousSealed.java (21.0.10+7-Ubuntu-124.04)
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broken/AnonymousSealed.java:5: error: anonymous classes must not extend sealed classes
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return new Payment() {}; // an anonymous class is a subtype nobody listed
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^
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1 error
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$ javac broken/AnonymousSealed.java (25.0.4.1+1-LTS)
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broken/AnonymousSealed.java:5: error: anonymous classes must not extend sealed classes
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return new Payment() {}; // an anonymous class is a subtype nobody listed
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^
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1 error
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$ javac broken/AnonymousSealed.java (27+35)
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broken/AnonymousSealed.java:5: error: anonymous classes must not extend sealed classes
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return new Payment() {}; // an anonymous class is a subtype nobody listed
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^
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1 error
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$ javac broken/xpkg/a/Base.java broken/xpkg/b/Impl.java (21.0.10+7-Ubuntu-124.04)
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broken/xpkg/a/Base.java:2: error: class Base in unnamed module cannot extend a sealed class in a different package
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public sealed interface Base permits b.Impl {}
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^
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1 error
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$ javac broken/xpkg/a/Base.java broken/xpkg/b/Impl.java (25.0.4.1+1-LTS)
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broken/xpkg/a/Base.java:2: error: class Base in unnamed module cannot extend a sealed class in a different package
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public sealed interface Base permits b.Impl {}
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^
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1 error
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$ javac broken/xpkg/a/Base.java broken/xpkg/b/Impl.java (27+35)
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broken/xpkg/a/Base.java:2: error: class Base in unnamed module cannot extend a sealed class in a different package
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public sealed interface Base permits b.Impl {}
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^
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1 error
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