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test/tools/javac/CaptureInSubtype.java@2eb010b6cb22 (annotated)

test/tools/javac/CaptureInSubtype.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 554

9d9f26857129

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 5044157
aoqi@0	27	* @summary type system loophole in wildcard substitution
aoqi@0	28	* @author Gilad Bracha
aoqi@0	29	*
aoqi@0	30	* @compile/fail CaptureInSubtype.java
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import java.util.List;
aoqi@0	34	import java.util.ArrayList;
aoqi@0	35
aoqi@0	36	public class CaptureInSubtype {
aoqi@0	37
aoqi@0	38	static class SuperOfFlaw<S>{
aoqi@0	39	S s;
aoqi@0	40	S get() { return s;}
aoqi@0	41	void put(S a) { s = a;}
aoqi@0	42
aoqi@0	43	SuperOfFlaw(S a) { s = a;}
aoqi@0	44	}
aoqi@0	45
aoqi@0	46	static class Flaw<T> extends SuperOfFlaw<List<T>> {
aoqi@0	47	List<T> fetch(){return s;}
aoqi@0	48
aoqi@0	49	Flaw(T t){super(new ArrayList<T>()); s.add(t);}
aoqi@0	50	}
aoqi@0	51
aoqi@0	52	static class SuperOfShowFlaw {
aoqi@0	53
aoqi@0	54	SuperOfFlaw<List<?>> m(){return null;}
aoqi@0	55	}
aoqi@0	56
aoqi@0	57
aoqi@0	58	public static class ShowFlaw extends SuperOfShowFlaw {
aoqi@0	59	static Flaw<Number> fn = new Flaw<Number>(new Integer(3));
aoqi@0	60
aoqi@0	61	Flaw<?> m(){return fn;}
aoqi@0	62	}
aoqi@0	63
aoqi@0	64	public static void main(String[] args) {
aoqi@0	65	SuperOfShowFlaw sosf = new ShowFlaw();
aoqi@0	66	SuperOfFlaw<List<?>> sof = sosf.m();
aoqi@0	67	List<String> ls = new ArrayList<String>();
aoqi@0	68	ls.add("Smalltalk rules!");
aoqi@0	69	sof.put(ls);
aoqi@0	70	Number n = ShowFlaw.fn.get().get(0);
aoqi@0	71	}
aoqi@0	72
aoqi@0	73	}