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test/tools/javac/lambda/typeInference/InferenceTest_neg5.java@c09b7234cded (annotated)

test/tools/javac/lambda/typeInference/InferenceTest_neg5.java

Tue, 14 May 2013 11:11:09 -0700

author

rfield

date

Tue, 14 May 2013 11:11:09 -0700

changeset 1752

c09b7234cded

parent 1415

01c9d4161882

permissions

-rw-r--r--

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

mcimadamore@1415	1	/*
mcimadamore@1415	2	* @test /nodynamiccopyright/
mcimadamore@1415	3	* @bug 8003280
mcimadamore@1415	4	* @summary Add lambda tests
mcimadamore@1415	5	* Missing cast to SAM type that causes type inference to not work.
mcimadamore@1415	6	* @compile/fail/ref=InferenceTest_neg5.out -XDrawDiagnostics InferenceTest_neg5.java
mcimadamore@1415	7	*/
mcimadamore@1415	8
mcimadamore@1415	9	import java.util.*;
mcimadamore@1415	10
mcimadamore@1415	11	public class InferenceTest_neg5 {
mcimadamore@1415	12	public static void main(String[] args) {
mcimadamore@1415	13	InferenceTest_neg5 test = new InferenceTest_neg5();
mcimadamore@1415	14	test.method1(n -> {});
mcimadamore@1415	15	test.method1((SAM1<String>)n -> {});
mcimadamore@1415	16	test.method1((SAM1<Integer>)n -> {n++;});
mcimadamore@1415	17	test.method1((SAM1<Comparator<String>>)n -> {List<String> list = Arrays.asList("string1", "string2"); Collections.sort(list,n);});
mcimadamore@1415	18	test.method1((SAM1<Thread>)n -> {n.start();});
mcimadamore@1415	19	}
mcimadamore@1415	20
mcimadamore@1415	21	interface SAM1<X> {
mcimadamore@1415	22	void m1(X arg);
mcimadamore@1415	23	}
mcimadamore@1415	24
mcimadamore@1415	25	<X> void method1(SAM1<X> s) {}
mcimadamore@1415	26	}