1 /*

     2  * @test /nodynamiccopyright/

     3  * @bug 7196163

     4  * @summary Twr with resource variables as lambda expressions and method references

     5  * @compile/fail/ref=TwrAndLambda.out -XDrawDiagnostics TwrAndLambda.java

     6  */

     7 

     8 public class TwrAndLambda {

     9 

    10     public static void main(String... args) {

    11 

    12         // Lambda expression

    13         AutoCloseable v1 = () -> {};

    14         // Static method reference

    15         AutoCloseable v2 = TwrAndLambda::close1;

    16         // Instance method reference

    17         AutoCloseable v3 = new TwrAndLambda()::close2;

    18         // Lambda expression which is not AutoCloseable

    19         Runnable r1 = () -> {};

    20         // Static method reference which is not AutoCloseable

    21         Runnable r2 = TwrAndLambda::close1;

    22         // Instance method reference which is not AutoCloseable

    23         Runnable r3 = new TwrAndLambda()::close2;

    24 

    25         try (v1) {

    26         } catch(Exception e) {}

    27         try (v2) {

    28         } catch(Exception e) {}

    29         try (v3) {

    30         } catch(Exception e) {}

    31         try (r1) {

    32         } catch(Exception e) {}

    33         try (r2) {

    34         } catch(Exception e) {}

    35         try (r3) {

    36         } catch(Exception e) {}

    37 

    38         // lambda invocation

    39         I i = (x) -> { try(x) { } catch (Exception e) { } };

    40         i.m(v1);

    41         i.m(v2);

    42         i.m(v3);

    43         i.m(r1);

    44         i.m(r2);

    45         i.m(r3);

    46     }

    47 

    48     static interface I {

    49         public void m(AutoCloseable r);

    50     }

    51 

    52     public static void close1() { }

    53 

    54     public void close2() { }

    55 }