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Populate children of Java
sealed
hierarchy
Required for checking permitted subclasses and for exhaustiveness of patterns. Co-authored-by: Lukas Rytz <lukas.rytz@gmail.com>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,7 @@ | ||
t.scala:7: warning: match may not be exhaustive. | ||
It would fail on the following input: W() | ||
x match { | ||
^ | ||
error: No warnings can be incurred under -Werror. | ||
1 warning | ||
1 error |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,14 @@ | ||
// javaVersion: 17+ | ||
package p; | ||
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sealed abstract public class X { | ||
} | ||
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final class W extends X { | ||
} | ||
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final class Y extends X { | ||
} | ||
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||
final class Z extends X { | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,12 @@ | ||
// javaVersion: 17+ | ||
// scalac: -Werror | ||
package p | ||
|
||
class C { | ||
def f(x: X) = | ||
x match { | ||
case y: Y => y.toString | ||
case z: Z => z.toString | ||
} | ||
} | ||
|
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,11 @@ | ||
t.scala:7: warning: match may not be exhaustive. | ||
It would fail on the following input: W() | ||
x match { | ||
^ | ||
t.scala:12: warning: match may not be exhaustive. | ||
It would fail on the following inputs: Z(), Z2() | ||
x match { | ||
^ | ||
error: No warnings can be incurred under -Werror. | ||
2 warnings | ||
1 error |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,20 @@ | ||
// javaVersion: 17+ | ||
package p; | ||
|
||
sealed abstract public class X { | ||
} | ||
|
||
final class W extends X { | ||
} | ||
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||
final class Y extends X { | ||
} | ||
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sealed class Z extends X permits Z1, Z2 { | ||
} | ||
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final class Z1 extends Z { | ||
} | ||
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||
final class Z2 extends Z { | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,18 @@ | ||
// javaVersion: 17+ | ||
// scalac: -Werror | ||
package p | ||
|
||
class C { | ||
def f(x: X) = | ||
x match { | ||
case y: Y => y.toString | ||
case z: Z => z.toString | ||
} | ||
def g(x: X) = | ||
x match { | ||
case w: W => w.toString | ||
case y: Y => y.toString | ||
case z: Z1 => z.toString | ||
} | ||
} | ||
|
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,11 @@ | ||
t.scala:7: warning: match may not be exhaustive. | ||
It would fail on the following input: W() | ||
x match { | ||
^ | ||
t.scala:12: warning: match may not be exhaustive. | ||
It would fail on the following inputs: Z(), Z2() | ||
x match { | ||
^ | ||
error: No warnings can be incurred under -Werror. | ||
2 warnings | ||
1 error |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,14 @@ | ||
// javaVersion: 17+ | ||
package p; | ||
|
||
sealed abstract public class X { | ||
} | ||
|
||
final class W extends X { | ||
} | ||
|
||
final class Y extends X { | ||
} | ||
|
||
sealed class Z extends X permits Z1, Z2 { | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,8 @@ | ||
// javaVersion: 17+ | ||
package p; | ||
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||
final class Z1 extends Z { | ||
} | ||
|
||
final class Z2 extends Z { | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,18 @@ | ||
// javaVersion: 17+ | ||
// scalac: -Werror | ||
package p | ||
|
||
class C { | ||
def f(x: X) = | ||
x match { | ||
case y: Y => y.toString | ||
case z: Z => z.toString | ||
} | ||
def g(x: X) = | ||
x match { | ||
case w: W => w.toString | ||
case y: Y => y.toString | ||
case z: Z1 => z.toString | ||
} | ||
} | ||
|
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,9 @@ | ||
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package p; | ||
public sealed interface X { | ||
public default int x() { return 1; } | ||
} | ||
final class Y implements X { } | ||
final class O { | ||
final static class Z implements X { } | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,5 @@ | ||
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package p | ||
class T { | ||
def n(a: X) = a match { case _: Y => 0 } | ||
} |