mambastudio opened a new issue, #7388:
URL: https://github.com/apache/netbeans/issues/7388
### Apache NetBeans version
Apache NetBeans 21
### What happened
Seems using var in pattern matching when implementing Algebraic Data Type
patterns results "_Exception in thread "main" java.lang.RuntimeException:
Uncompilable code_"
### Language / Project Type / NetBeans Component
_No response_
### How to reproduce
Seems using var in pattern matching when implementing Algebraic Data Type
patterns results "_Exception in thread "main" java.lang.RuntimeException:
Uncompilable code_"
For example, the code below throws the exception when run on netbeans
`public class ADTEvaluation {
sealed interface Expr{}
record ConstExpr(int i) implements Expr{}
record SumExpr(Expr left, Expr right) implements Expr{}
static int eval(Expr e){
return switch(e){
case SumExpr(var a, var b) -> eval(a) + eval(b);
case ConstExpr(int i) -> i;
default -> 3;
};
}
public static void main(String... args)
{
var v = new ConstExpr(3);
var x = eval(v);
System.out.println(x);
}
}`
But if I change the SumExpr(var a, var b), to SumExpr(ConstExpr a, ConstExpr
b) in the pattern matching in switch, the following code works
`public class ADTEvaluation {
sealed interface Expr{}
record ConstExpr(int i) implements Expr{}
record SumExpr(Expr left, Expr right) implements Expr{}
static int eval(Expr e){
return switch(e){
case SumExpr(ConstExpr a, ConstExpr b) -> eval(a) + eval(b);
case ConstExpr(int i) -> i;
default -> 3;
};
}
public static void main(String... args)
{
var v = new ConstExpr(3);
var x = eval(v);
System.out.println(x);
}
}`
I'm running Netbeans 21, using JDK 22. There is no problem if I run the code
in jdk 22 directly.
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Windows 10
### JDK
22
### Apache NetBeans packaging
Apache NetBeans provided installer
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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