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 * @enablePreview
30 * @library /tools/lib /tools/javac/lib
31 * @modules
32 * jdk.compiler/com.sun.tools.javac.api
33 * jdk.compiler/com.sun.tools.javac.file
34 * jdk.compiler/com.sun.tools.javac.main
35 * jdk.compiler/com.sun.tools.javac.util
36 * @build toolbox.ToolBox toolbox.JavacTask
37 * @build combo.ComboTestHelper
38 * @compile ScopeResizeTest.java
39 * @run main ScopeResizeTest
40 */
41
42 import combo.ComboInstance;
43 import combo.ComboParameter;
44 import combo.ComboTask;
45 import combo.ComboTestHelper;
46 import java.util.stream.Stream;
47 import toolbox.ToolBox;
48
49 public class ScopeResizeTest extends ComboInstance<ScopeResizeTest> {
50 protected ToolBox tb;
51
52 ScopeResizeTest() {
53 super();
54 tb = new ToolBox();
55 }
56
57 public static void main(String... args) throws Exception {
58 int variantsSize = 17;
59 PredefinedVariables[] variants = Stream.iterate(0, i -> i + 1)
60 .limit(variantsSize)
61 .map(s -> new PredefinedVariables(s))
62 .toArray(s -> new PredefinedVariables[s]);
63 new ComboTestHelper<ScopeResizeTest>()
64 .withDimension("PREDEFINED_VARIABLES", (x, predefinedVariables) -> x.predefinedVariables = predefinedVariables, variants)
65 .run(ScopeResizeTest::new);
66 }
67
68 private PredefinedVariables predefinedVariables;
69
70 private static final String MAIN_TEMPLATE =
71 """
72 public class Test {
73 public static void test(Object o) {
74 #{PREDEFINED_VARIABLES}
75 switch (o) {
76 case String s when s.isEmpty() -> {}
77 default -> {}
78 }
79 }
80 }
81 """;
82
83 @Override
84 protected void doWork() throws Throwable {
85 ComboTask task = newCompilationTask()
86 .withSourceFromTemplate(MAIN_TEMPLATE, pname -> switch (pname) {
87 case "PREDEFINED_VARIABLES" -> predefinedVariables;
88 default -> throw new UnsupportedOperationException(pname);
89 });
90
91 task.analyze(result -> {});
92 }
93
94 public record PredefinedVariables(int size) implements ComboParameter {
95 @Override
96 public String expand(String optParameter) {
97 StringBuilder variables = new StringBuilder();
98 for (int i = 0; i < size(); i++) {
99 variables.append("int i" + i + ";\n");
100 }
101 return variables.toString();
102 }
103 }
104
105 }