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 * @enablePreview
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 BreakAndLoops.java
38 * @run main BreakAndLoops
39 */
40
41 import combo.ComboInstance;
42 import combo.ComboParameter;
43 import combo.ComboTask;
44 import combo.ComboTestHelper;
45 import java.nio.file.Path;
46 import java.nio.file.Paths;
47 import toolbox.ToolBox;
48
49 public class BreakAndLoops extends ComboInstance<BreakAndLoops> {
50 protected ToolBox tb;
51
52 BreakAndLoops() {
53 super();
54 tb = new ToolBox();
55 }
56
57 public static void main(String... args) throws Exception {
58 new ComboTestHelper<BreakAndLoops>()
59 .withDimension("OUTTER_LABEL", (x, outterLabel) -> x.outterLabel = outterLabel, OutterLabel.values())
60 .withDimension("OUTTER_LOOP", (x, outterLoop) -> x.outterLoop = outterLoop, OutterLoop.values())
61 .withDimension("MAIN_LOOP", (x, mainLoop) -> x.mainLoop = mainLoop, MainLoop.values())
62 .withDimension("INNER_LABEL", (x, innerLabel) -> x.innerLabel = innerLabel, Label.values())
63 .withDimension("INNER_LOOP", (x, innerLoop) -> x.innerLoop = innerLoop, Loop.values())
64 .withDimension("BREAK", (x, brk) -> x.brk = brk, Break.values())
65 .withFilter(bal -> bal.outterLabel != OutterLabel.LABEL || bal.innerLabel != Label.LABEL)
66 .run(BreakAndLoops::new);
67 }
68
69 private OutterLabel outterLabel;
70 private OutterLoop outterLoop;
71 private MainLoop mainLoop;
72 private Label innerLabel;
73 private Loop innerLoop;
74 private Break brk;
75
76 private static final String MAIN_TEMPLATE =
77 """
78 public class Test {
79 public static void doTest(Object o, int i, Object[] arr) {
80 #{OUTTER_LABEL}
81 }
82 }
83 """;
84
85 @Override
86 protected void doWork() throws Throwable {
87 Path base = Paths.get(".");
88
89 ComboTask task = newCompilationTask()
90 .withSourceFromTemplate(MAIN_TEMPLATE, pname -> switch (pname) {
91 case "OUTTER_LABEL" -> outterLabel;
92 case "OUTTER_LOOP" -> outterLoop;
93 case "MAIN_LOOP" -> mainLoop;
94 case "NESTED_LOOP" -> innerLoop;
95 case "NESTED" -> brk;
96 case "BODY" -> innerLabel;
97 default -> throw new UnsupportedOperationException(pname);
98 });
99
100 task.generate(result -> {
101 boolean shouldPass;
102 if (brk == Break.NONE) {
103 shouldPass = true;
104 } else if (innerLabel == Label.LABEL && brk == Break.BREAK_LABEL) {
105 shouldPass = true;
106 } else if (innerLoop.supportsAnonymousBreak && brk == Break.BREAK) {
107 shouldPass = true;
108 } else if (outterLabel == OutterLabel.LABEL && brk == Break.BREAK_LABEL && outterLoop != OutterLoop.NONE) {
109 shouldPass = switch(mainLoop) {
110 case WHILE, FOR -> true;
111 case DO_WHILE -> switch (innerLoop) {
112 case WHILE, FOR, FOR_EACH -> true;
113 //the statement following the do-while is unreachable:
114 case BLOCK, DO_WHILE, NONE -> {
115 yield false;
116 }
117 };
118 };
119 } else {
120 shouldPass = false;
121 }
122 if (!(shouldPass ^ result.hasErrors())) {
123 throw new AssertionError("Unexpected result: " + result.compilationInfo());
124 }
125 });
126 }
127
128 public enum MainLoop implements ComboParameter {
129 WHILE("""
130 while (!(o instanceof String s)) {
131 #{BODY}
132 }
133 """),
134 FOR("""
135 for( ; !(o instanceof String s) ; ) {
136 #{BODY}
137 }
138 """),
139 DO_WHILE("""
140 do {
141 #{BODY}
142 } while (!(o instanceof String s));
143 """);
144 private final String body;
145
146 private MainLoop(String body) {
147 this.body = body;
148 }
149
150 @Override
151 public String expand(String optParameter) {
152 return body;
153 }
154 }
155
156 public enum OutterLabel implements ComboParameter {
157 NONE("#{OUTTER_LOOP}"),
158 LABEL("LABEL: #{OUTTER_LOOP}");
159 private final String code;
160
161 private OutterLabel(String code) {
162 this.code = code;
163 }
164
165 @Override
166 public String expand(String optParameter) {
167 return code;
168 }
169 }
170
171 public enum OutterLoop implements ComboParameter {
172 NONE("#{MAIN_LOOP} System.err.println(s);"),
173 BLOCK("{ #{MAIN_LOOP} System.err.println(s); }"),
174 WHILE("while (i-- > 0) { #{MAIN_LOOP} System.err.println(s); }"),
175 FOR("for ( ; i-- > 0; ) { #{MAIN_LOOP} System.err.println(s); }"),
176 FOR_EACH("for (Object outterO : arr) { #{MAIN_LOOP} System.err.println(s); }"),
177 DO_WHILE("do { #{MAIN_LOOP} System.err.println(s); } while (i-- > 0);");
178 private final String code;
179
180 private OutterLoop(String code) {
181 this.code = code;
182 }
183
184 @Override
185 public String expand(String optParameter) {
186 return code;
187 }
188 }
189
190 public enum Label implements ComboParameter {
191 NONE("#{NESTED_LOOP}"),
192 LABEL("LABEL: #{NESTED_LOOP}");
193 private final String code;
194
195 private Label(String code) {
196 this.code = code;
197 }
198
199 @Override
200 public String expand(String optParameter) {
201 return code;
202 }
203 }
204
205 public enum Loop implements ComboParameter {
206 NONE("#{NESTED}", false),
207 BLOCK("{ #{NESTED} }", false),
208 WHILE("while (i-- > 0) { #{NESTED} }", true),
209 FOR("for ( ; i-- > 0; ) { #{NESTED} }", true),
210 FOR_EACH("for (Object innerO : arr) { #{NESTED} }", true),
211 DO_WHILE("do { #{NESTED} } while (i-- > 0);", true);
212 private final String code;
213 private final boolean supportsAnonymousBreak;
214
215 private Loop(String code, boolean supportsAnonymousBreak) {
216 this.code = code;
217 this.supportsAnonymousBreak = supportsAnonymousBreak;
218 }
219
220 @Override
221 public String expand(String optParameter) {
222 return code;
223 }
224 }
225
226 public enum Break implements ComboParameter {
227 NONE(";"),
228 BREAK("break;"),
229 BREAK_LABEL("break LABEL;");
230 private final String code;
231
232 private Break(String code) {
233 this.code = code;
234 }
235
236 @Override
237 public String expand(String optParameter) {
238 return code;
239 }
240 }
241 }