test/langtools/tools/javac/patterns/MatchExceptionLambdaExpression.java

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/**
 * @test
 * @bug 8335817
 * @summary Verify synthetic catches for deconstruction patterns work properly in expression lambdas
 * @compile MatchExceptionLambdaExpression.java
 * @run main MatchExceptionLambdaExpression
 */
public class MatchExceptionLambdaExpression {

    public static void main(String[] args) {
        try {
            doRunPrimitiveVoid(new A("", true), o -> checkPrimitiveVoid(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
        try {
            doRunPrimitiveVoid(new A("", true), o -> checkVoidBox(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
        try {
            doRunPrimitiveVoid(new A("", true), o -> checkNonVoid(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
        try {
            doRunVoidBox(new A("", true), o -> checkVoidBox(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
        try {
            doRunNonVoid(new A("", true), o -> checkVoidBox(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
        try {
            doRunNonVoid(new A("", true), o -> checkNonVoid(o instanceof A(String s, _), true));
            throw new AssertionError("Didn't gete the expected exception!");
        } catch (MatchException ex) {
            if (ex.getCause() instanceof RequestedException) {
                //correct
            } else {
                throw ex;
            }
        }
    }

    static void doRunPrimitiveVoid(Object inp, PrimitiveVoidFI toRun) {
       toRun.run(inp);
    }

    static void doRunVoidBox(Object inp, VoidBoxFI toRun) {
       toRun.run(inp);
    }

    static void doRunNonVoid(Object inp, NonVoidFI toRun) {
       toRun.run(inp);
    }

    static void checkPrimitiveVoid(boolean a, boolean shouldNotBeCalled) {
        if (shouldNotBeCalled) {
            throw new AssertionError("Should not be called.");
        }
    }

    static Void checkVoidBox(boolean a, boolean shouldNotBeCalled) {
        if (shouldNotBeCalled) {
            throw new AssertionError("Should not be called.");
        }
        return null;
    }

    static Object checkNonVoid(boolean a, boolean shouldNotBeCalled) {
        if (shouldNotBeCalled) {
            throw new AssertionError("Should not be called.");
        }
        return null;
    }

    interface PrimitiveVoidFI {
        public void run(Object o);
    }

    interface VoidBoxFI {
        public Void run(Object o);
    }

    interface NonVoidFI {
        public Object run(Object o);
    }

    record A(String s, boolean fail) {
        public String s() {
            if (fail) {
                throw new RequestedException();
            }
            return s;
        }
    }

    static class RequestedException extends RuntimeException {}
}