import java.util.function.*;

class Test {
  void test1(Object o, int mode) {
    switch (o) {
      case (Integer i) && i == <error descr="Variable used in guarded pattern should be final or effectively final">mode</error> -> System.out.println();
      default -> {}
    }

    switch (o) {
      case (Integer i) && (switch (o) {
        case Integer ii && ii != <error descr="Variable used in guarded pattern should be final or effectively final">mode</error> -> 2;
        case default -> 1;
      }) == <error descr="Variable used in guarded pattern should be final or effectively final">mode</error> -> System.out.println();
      default -> {}
    }

    switch (o) {
      case (Integer i) && (i = <error descr="Variable used in guarded pattern should be final or effectively final">mode</error>) > 0 -> System.out.println();
      default -> {}
    }
    mode = 0;
  }

  void test2(Object o, final int mode) {
    switch (o) {
      case (Integer i) && (switch (<error descr="Variable used in guarded pattern should be final or effectively final">o</error>) {
        case Integer ii && ii != mode -> 2;
          case default -> 1;
      }) == mode -> o = null;
        default -> {}
    }
    switch (o) {
      case (Integer i) && (i = mode) > 0 -> System.out.println();
      default -> {}
    }
  }

  void test3(Object o, int mode) {
    switch (o) {
      case (Integer i) && i == mode -> System.out.println();
      default -> {}
    }
    switch (o) {
      case (Integer i) && (switch (o) {
        case Integer ii && ii != mode -> 2;
        case default -> 1;
      }) == mode -> System.out.println();
      default -> {}
    }
  }

  void testInstanceofPatterns(Object o, int mode) {
    if (o instanceof Integer i && (i = mode) > 0) {
    }
    mode = 0;
  }

  void testNested(Object o, Integer in) {
    switch (o) {
      case Integer mode && (mode = 42) > 9:
        switch (o) {
          case (Integer i) && (i = <error descr="Variable used in guarded pattern should be final or effectively final">mode</error>) > 0 -> System.out.println();
          default -> System.out.println();
        }
      default : break;
    }
    String str;
    str = switch (o) {
      case Integer mode && (mode = 42) > 9 ->
        switch (o) {
          case (Integer i) && (i = <error descr="Variable used in guarded pattern should be final or effectively final">mode</error>) > 0 -> "";
          default -> "";
        };
      default -> "";
    };
    str = switch (o) {
      case Integer mode && (mode = 42) > 9:
        yield switch (o) {
          case (Integer i) && (i = <error descr="Variable used in guarded pattern should be final or effectively final">mode</error>) > 0 -> "";
          default -> "";
        };
      default: yield "";
    };
    // lambdas
    str = switch (o) {
      case Integer i && (i = <error descr="Variable used in guarded pattern should be final or effectively final">in</error>) > 0:
        yield ((Function<Integer, String>)(x) -> (<error descr="Variable used in lambda expression should be final or effectively final">in</error> = 5) > 0 ? "" : null).apply(in);
      default:
        yield "";
    };
    Consumer<Integer> c = (mode) -> {
      switch (o) {
        case (Integer i) && (i = <error descr="Variable used in guarded pattern should be final or effectively final">in</error>) > 0 -> System.out.println();
        default -> System.out.println();
      }
      <error descr="Variable used in lambda expression should be final or effectively final">in</error> = 1;
    };
    // try-with-resources
    try (<error descr="Variable used as a try-with-resources resource should be final or effectively final">in</error>) {
      switch (o) {
        case AutoCloseable ii && (<error descr="Variable used in guarded pattern should be final or effectively final">in</error> = ii) != null: break;
        default: break;
      }
    } catch (Exception e) {
    }
    // double nested
    switch (o) {
      case Integer mode && (mode = 42) > 9:
        switch (o) {
          case Integer i -> {
            switch (o) {
              case Integer ii && ii > <error descr="Variable used in guarded pattern should be final or effectively final">mode</error>:
                break;
              default:
                break;
            }
          }
          default -> System.out.println();
        }
      default:
        break;
    }
    str = switch (o) {
      case Integer mode && (mode) > 9:
        yield switch (o) {
          case Integer i -> {
            yield switch (o) {
              case Integer ii && ii > mode: yield "";
              default: yield "";
            };
          }
          default -> "";
        };
      default: yield "";
    };
  }
}