jdk8-mips64-public/langtools: test/tools/javac/lambda/FunctionalInterfaceAnno.java@c09b7234cded

8012556: Implement lambda methods on interfaces as static
8006140: Javac NPE compiling Lambda expression on initialization expression of static field in interface
Summary: Lambdas occurring in static contexts or those not needing instance information should be generated into static methods. This has long been the case for classes. However, as a work-around to the lack of support for statics on interfaces, interface lambda methods have been generated into default methods. For lambdas in interface static contexts (fields and static methods) this causes an NPE in javac because there is no 'this'. MethodHandles now support static methods on interfaces. This changeset allows lambda methods to be generated as static interface methods. An existing bug in Hotspot (8013875) is exposed in a test when the "-esa" flag is used. This test and another test that already exposed this bug have been marked with @ignore.
Reviewed-by: mcimadamore

     1 /*

     2  * @test /nodynamiccopyright/

     3  * @summary smoke test for functional interface annotation

     4  * @compile/fail/ref=FunctionalInterfaceAnno.out -XDrawDiagnostics FunctionalInterfaceAnno.java

     5  */

     6 class FunctionalInterfaceAnno {

     7     @FunctionalInterface

     8     static class A { } //not an interface

    10     @FunctionalInterface

    11     static abstract class B { } //not an interface

    13     @FunctionalInterface

    14     enum C { } //not an interface

    16     @FunctionalInterface

    17     @interface D { } //not an interface

    19     @FunctionalInterface

    20     interface E { } //no abstracts

    22     @FunctionalInterface

    23     interface F { default void m() { } } //no abstracts

    25     @FunctionalInterface

    26     interface G { String toString(); } //no abstracts

    28     @FunctionalInterface

    29     interface H { void m(); void n(); } //incompatible abstracts

    31     @FunctionalInterface

    32     interface I { void m(); } //ok

    33 }

Mercurial > jdk8-mips64-public > langtools / file revision

test/tools/javac/lambda/FunctionalInterfaceAnno.java@c09b7234cded

test/tools/javac/lambda/FunctionalInterfaceAnno.java