1 /*
2 * Copyright (c) 2022, 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 8292756
27 * @summary Verify the Scope can be safely and correctly resized to accommodate pattern binding variables
28 * when the Scope for a guard is constructed.
29 * @library /tools/lib /tools/javac/lib
30 * @modules
31 * jdk.compiler/com.sun.tools.javac.api
32 * jdk.compiler/com.sun.tools.javac.file
33 * jdk.compiler/com.sun.tools.javac.main
34 * jdk.compiler/com.sun.tools.javac.util
35 * @build toolbox.ToolBox toolbox.JavacTask
36 * @build combo.ComboTestHelper
37 * @compile ScopeResizeTest.java
38 * @run main ScopeResizeTest
39 */
40
41 import combo.ComboInstance;
42 import combo.ComboParameter;
43 import combo.ComboTask;
44 import combo.ComboTestHelper;
45 import java.util.stream.Stream;
46 import toolbox.ToolBox;
47
48 public class ScopeResizeTest extends ComboInstance<ScopeResizeTest> {
49 protected ToolBox tb;
50
51 ScopeResizeTest() {
52 super();
53 tb = new ToolBox();
54 }
55
56 public static void main(String... args) throws Exception {
57 int variantsSize = 17;
58 PredefinedVariables[] variants = Stream.iterate(0, i -> i + 1)
59 .limit(variantsSize)
60 .map(s -> new PredefinedVariables(s))
61 .toArray(s -> new PredefinedVariables[s]);
62 new ComboTestHelper<ScopeResizeTest>()
63 .withDimension("PREDEFINED_VARIABLES", (x, predefinedVariables) -> x.predefinedVariables = predefinedVariables, variants)
64 .run(ScopeResizeTest::new);
65 }
66
67 private PredefinedVariables predefinedVariables;
68
69 private static final String MAIN_TEMPLATE =
70 """
71 public class Test {
72 public static void test(Object o) {
73 #{PREDEFINED_VARIABLES}
74 switch (o) {
75 case String s when s.isEmpty() -> {}
76 default -> {}
77 }
78 }
79 }
80 """;
81
82 @Override
83 protected void doWork() throws Throwable {
84 ComboTask task = newCompilationTask()
85 .withSourceFromTemplate(MAIN_TEMPLATE, pname -> switch (pname) {
86 case "PREDEFINED_VARIABLES" -> predefinedVariables;
87 default -> throw new UnsupportedOperationException(pname);
88 });
89
90 task.analyze(result -> {});
91 }
92
93 public record PredefinedVariables(int size) implements ComboParameter {
94 @Override
95 public String expand(String optParameter) {
96 StringBuilder variables = new StringBuilder();
97 for (int i = 0; i < size(); i++) {
98 variables.append("int i" + i + ";\n");
99 }
100 return variables.toString();
101 }
102 }
103
104 }