1 /*
2 * Copyright (c) 2019, 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 8234922
27 * @summary Verify proper scope of binding related to loops and breaks.
28 * @library /tools/lib /tools/javac/lib
29 * @modules
30 * jdk.compiler/com.sun.tools.javac.api
31 * jdk.compiler/com.sun.tools.javac.file
32 * jdk.compiler/com.sun.tools.javac.main
33 * jdk.compiler/com.sun.tools.javac.util
34 * @build toolbox.ToolBox toolbox.JavacTask
35 * @build combo.ComboTestHelper
36 * @compile BreakAndLoops.java
37 * @run main BreakAndLoops
38 */
39
40 import combo.ComboInstance;
41 import combo.ComboParameter;
42 import combo.ComboTask;
43 import combo.ComboTestHelper;
44 import java.nio.file.Path;
45 import java.nio.file.Paths;
46 import toolbox.ToolBox;
47
48 public class BreakAndLoops extends ComboInstance<BreakAndLoops> {
49 protected ToolBox tb;
50
51 BreakAndLoops() {
52 super();
53 tb = new ToolBox();
54 }
55
56 public static void main(String... args) throws Exception {
57 new ComboTestHelper<BreakAndLoops>()
58 .withDimension("OUTTER_LABEL", (x, outterLabel) -> x.outterLabel = outterLabel, OutterLabel.values())
59 .withDimension("OUTTER_LOOP", (x, outterLoop) -> x.outterLoop = outterLoop, OutterLoop.values())
60 .withDimension("MAIN_LOOP", (x, mainLoop) -> x.mainLoop = mainLoop, MainLoop.values())
61 .withDimension("INNER_LABEL", (x, innerLabel) -> x.innerLabel = innerLabel, Label.values())
62 .withDimension("INNER_LOOP", (x, innerLoop) -> x.innerLoop = innerLoop, Loop.values())
63 .withDimension("BREAK", (x, brk) -> x.brk = brk, Break.values())
64 .withFilter(bal -> bal.outterLabel != OutterLabel.LABEL || bal.innerLabel != Label.LABEL)
65 .run(BreakAndLoops::new);
66 }
67
68 private OutterLabel outterLabel;
69 private OutterLoop outterLoop;
70 private MainLoop mainLoop;
71 private Label innerLabel;
72 private Loop innerLoop;
73 private Break brk;
74
75 private static final String MAIN_TEMPLATE =
76 """
77 public class Test {
78 public static void doTest(Object o, int i, Object[] arr) {
79 #{OUTTER_LABEL}
80 }
81 }
82 """;
83
84 @Override
85 protected void doWork() throws Throwable {
86 Path base = Paths.get(".");
87
88 ComboTask task = newCompilationTask()
89 .withSourceFromTemplate(MAIN_TEMPLATE, pname -> switch (pname) {
90 case "OUTTER_LABEL" -> outterLabel;
91 case "OUTTER_LOOP" -> outterLoop;
92 case "MAIN_LOOP" -> mainLoop;
93 case "NESTED_LOOP" -> innerLoop;
94 case "NESTED" -> brk;
95 case "BODY" -> innerLabel;
96 default -> throw new UnsupportedOperationException(pname);
97 });
98
99 task.generate(result -> {
100 boolean shouldPass;
101 if (brk == Break.NONE) {
102 shouldPass = true;
103 } else if (innerLabel == Label.LABEL && brk == Break.BREAK_LABEL) {
104 shouldPass = true;
105 } else if (innerLoop.supportsAnonymousBreak && brk == Break.BREAK) {
106 shouldPass = true;
107 } else if (outterLabel == OutterLabel.LABEL && brk == Break.BREAK_LABEL && outterLoop != OutterLoop.NONE) {
108 shouldPass = switch(mainLoop) {
109 case WHILE, FOR -> true;
110 case DO_WHILE -> switch (innerLoop) {
111 case WHILE, FOR, FOR_EACH -> true;
112 //the statement following the do-while is unreachable:
113 case BLOCK, DO_WHILE, NONE -> {
114 yield false;
115 }
116 };
117 };
118 } else {
119 shouldPass = false;
120 }
121 if (!(shouldPass ^ result.hasErrors())) {
122 throw new AssertionError("Unexpected result: " + result.compilationInfo());
123 }
124 });
125 }
126
127 public enum MainLoop implements ComboParameter {
128 WHILE("""
129 while (!(o instanceof String s)) {
130 #{BODY}
131 }
132 """),
133 FOR("""
134 for( ; !(o instanceof String s) ; ) {
135 #{BODY}
136 }
137 """),
138 DO_WHILE("""
139 do {
140 #{BODY}
141 } while (!(o instanceof String s));
142 """);
143 private final String body;
144
145 private MainLoop(String body) {
146 this.body = body;
147 }
148
149 @Override
150 public String expand(String optParameter) {
151 return body;
152 }
153 }
154
155 public enum OutterLabel implements ComboParameter {
156 NONE("#{OUTTER_LOOP}"),
157 LABEL("LABEL: #{OUTTER_LOOP}");
158 private final String code;
159
160 private OutterLabel(String code) {
161 this.code = code;
162 }
163
164 @Override
165 public String expand(String optParameter) {
166 return code;
167 }
168 }
169
170 public enum OutterLoop implements ComboParameter {
171 NONE("#{MAIN_LOOP} System.err.println(s);"),
172 BLOCK("{ #{MAIN_LOOP} System.err.println(s); }"),
173 WHILE("while (i-- > 0) { #{MAIN_LOOP} System.err.println(s); }"),
174 FOR("for ( ; i-- > 0; ) { #{MAIN_LOOP} System.err.println(s); }"),
175 FOR_EACH("for (Object outterO : arr) { #{MAIN_LOOP} System.err.println(s); }"),
176 DO_WHILE("do { #{MAIN_LOOP} System.err.println(s); } while (i-- > 0);");
177 private final String code;
178
179 private OutterLoop(String code) {
180 this.code = code;
181 }
182
183 @Override
184 public String expand(String optParameter) {
185 return code;
186 }
187 }
188
189 public enum Label implements ComboParameter {
190 NONE("#{NESTED_LOOP}"),
191 LABEL("LABEL: #{NESTED_LOOP}");
192 private final String code;
193
194 private Label(String code) {
195 this.code = code;
196 }
197
198 @Override
199 public String expand(String optParameter) {
200 return code;
201 }
202 }
203
204 public enum Loop implements ComboParameter {
205 NONE("#{NESTED}", false),
206 BLOCK("{ #{NESTED} }", false),
207 WHILE("while (i-- > 0) { #{NESTED} }", true),
208 FOR("for ( ; i-- > 0; ) { #{NESTED} }", true),
209 FOR_EACH("for (Object innerO : arr) { #{NESTED} }", true),
210 DO_WHILE("do { #{NESTED} } while (i-- > 0);", true);
211 private final String code;
212 private final boolean supportsAnonymousBreak;
213
214 private Loop(String code, boolean supportsAnonymousBreak) {
215 this.code = code;
216 this.supportsAnonymousBreak = supportsAnonymousBreak;
217 }
218
219 @Override
220 public String expand(String optParameter) {
221 return code;
222 }
223 }
224
225 public enum Break implements ComboParameter {
226 NONE(";"),
227 BREAK("break;"),
228 BREAK_LABEL("break LABEL;");
229 private final String code;
230
231 private Break(String code) {
232 this.code = code;
233 }
234
235 @Override
236 public String expand(String optParameter) {
237 return code;
238 }
239 }
240 }