LambdaInnerTypeVarReflect.java revision 3294:9adfb22ff08f 
1/*
2 * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 8005653
27 * @summary A lambda containing an inner class referencing an external type var
28 * @author  Robert Field
29 * @modules jdk.compiler
30 *          jdk.jdeps/com.sun.tools.javap
31 * @run main LambdaInnerTypeVarReflect
32 */
33
34import java.io.StringWriter;
35import java.io.PrintWriter;
36import java.io.IOException;
37
38public class LambdaInnerTypeVarReflect {
39
40    static int assertionCount = 0;
41
42    static void assertTrue(boolean cond) {
43        assertionCount++;
44        if (!cond)
45            throw new AssertionError();
46    }
47
48    interface I {
49        C doit();
50    }
51
52    abstract class C {
53        abstract Object it();
54    }
55
56    class TV {
57        C go() {
58            return foo("Frump").doit();
59        }
60
61        <RRRRR> I foo(RRRRR r) {
62            return () -> new C() {
63                public RRRRR xxxxx = r;
64                @Override
65                    Object it() { return xxxxx; };
66            };
67        }
68    }
69
70    void test1() throws IOException {
71        char[] buffer = new char[1024];
72        String innerName = new TV().go().getClass().getName();
73        StringWriter sw = new StringWriter();
74        PrintWriter pw = new PrintWriter(sw);
75        int exitCode = com.sun.tools.javap.Main.run(new String[] {innerName}, pw);
76        assertTrue(exitCode == 0);
77
78        String javapOut = sw.toString();
79        assertTrue(javapOut.contains(innerName));
80        assertTrue(!javapOut.contains("RRRRR"));
81    }
82
83    public static void main(String[] args) throws IOException {
84        LambdaInnerTypeVarReflect t = new LambdaInnerTypeVarReflect();
85        t.test1();
86        assertTrue(assertionCount == 3);
87    }
88}
89