1 /*
2 * Copyright (c) 2018, 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 import java.io.IOException;
25 import java.util.List;
26
27 import org.testng.ITestResult;
28 import org.testng.annotations.AfterMethod;
29 import org.testng.annotations.Test;
30 import tools.javac.combo.JavacTemplateTestBase;
31
32 import static java.util.stream.Collectors.toList;
33
34 @Test
35 public class ExpSwitchNestingTest extends JavacTemplateTestBase {
36 private static final String RUNNABLE = "Runnable r = () -> { # };";
37 private static final String INT_FN = "java.util.function.IntSupplier r = () -> { # };";
38 private static final String LABEL = "label: #";
39 private static final String DEF_LABEL_VAR = "int label = 0; { # }";
40 private static final String FOR = "for (int i=0; i<10; i++) { # }";
41 private static final String FOR_EACH = "for (int i : new int[] {}) { # }";
42 private static final String WHILE = "while (cond) { # }";
43 private static final String DO = "do { # } while (cond);";
44 private static final String SSWITCH = "switch (x) { case 0: # };";
45 private static final String ESWITCH_Z = "int res = switch (x) { case 0 -> { # } default -> 0; };";
46 private static final String ESWITCH_S = "String res_string = switch (x) { case 0 -> { # } default -> \"default\"; };";
47 private static final String INT_FN_ESWITCH = "java.util.function.IntSupplier r = switch (x) { case 0 -> { # } default -> null; };";
48 private static final String INT_ESWITCH_DEFAULT = "int res = switch (x) { default -> { # } };";
49 private static final String IF = "if (cond) { # } else throw new RuntimeException();";
50 private static final String BLOCK = "{ # }";
51 private static final String YIELD_Z = "yield 0;";
52 private static final String YIELD_S = "yield \"hello world\";";
53 private static final String YIELD_INT_FN = "yield () -> 0 ;";
54 private static final String BREAK_N = "break;";
55 private static final String BREAK_L = "break label;";
56 private static final String YIELD_L = "yield label;";
57 private static final String RETURN_Z = "return 0;";
58 private static final String RETURN_N = "return;";
59 private static final String RETURN_S = "return \"Hello\";";
60 private static final String CONTINUE_N = "continue;";
61 private static final String CONTINUE_L = "continue label;";
62 private static final String NOTHING = "System.out.println();";
63
64 // containers that do not require exhaustiveness
65 private static final List<String> CONTAINERS
66 = List.of(RUNNABLE, FOR, WHILE, DO, SSWITCH, IF, BLOCK);
67 // containers that do not require exhaustiveness that are statements
68 private static final List<String> CONTAINER_STATEMENTS
69 = List.of(FOR, WHILE, DO, SSWITCH, IF, BLOCK);
70
71 @AfterMethod
72 public void dumpTemplateIfError(ITestResult result) {
73 // Make sure offending template ends up in log file on failure
74 if (!result.isSuccess()) {
75 System.err.printf("Diagnostics: %s%nTemplate: %s%n", diags.errorKeys(), sourceFiles.stream().map(p -> p.snd).collect(toList()));
76 }
77 }
78
79 private void program(String... constructs) {
80 String s = "class C { static boolean cond = false; static int x = 0; void m() { # } }";
81 for (String c : constructs)
82 s = s.replace("#", c);
83 addSourceFile("C.java", new StringTemplate(s));
84 }
85
86 private void assertOK(String... constructs) {
87 reset();
88 addCompileOptions();
89 program(constructs);
90 try {
91 compile();
92 }
93 catch (IOException e) {
94 throw new RuntimeException(e);
95 }
96 assertCompileSucceeded();
97 }
98
99 private void assertOKWithWarning(String warning, String... constructs) {
100 reset();
101 addCompileOptions();
102 program(constructs);
103 try {
104 compile();
105 }
106 catch (IOException e) {
107 throw new RuntimeException(e);
108 }
109 assertCompileSucceededWithWarning(warning);
110 }
111
112 private void assertFail(String expectedDiag, String... constructs) {
113 reset();
114 addCompileOptions();
115 program(constructs);
116 try {
117 compile();
118 }
119 catch (IOException e) {
120 throw new RuntimeException(e);
121 }
122 assertCompileFailed(expectedDiag);
123 }
124
125 public void testReallySimpleCases() {
126 for (String s : CONTAINERS)
127 assertOK(s, NOTHING);
128 for (String s : CONTAINER_STATEMENTS)
129 assertOK(LABEL, s, NOTHING);
130 }
131
132 public void testLambda() {
133 assertOK(RUNNABLE, RETURN_N);
134 assertOK(RUNNABLE, NOTHING);
135 assertOK(INT_FN, RETURN_Z);
136 assertFail("compiler.err.break.outside.switch.loop", RUNNABLE, BREAK_N);
137 assertFail("compiler.err.no.switch.expression", RUNNABLE, YIELD_Z);
138 assertFail("compiler.err.no.switch.expression", RUNNABLE, YIELD_S);
139 assertFail("compiler.err.break.outside.switch.loop", INT_FN, BREAK_N);
140 assertFail("compiler.err.no.switch.expression", INT_FN, YIELD_Z);
141 assertFail("compiler.err.no.switch.expression", INT_FN, YIELD_S);
142 assertFail("compiler.err.cont.outside.loop", RUNNABLE, CONTINUE_N);
143 assertFail("compiler.err.undef.label", RUNNABLE, BREAK_L);
144 assertFail("compiler.err.undef.label", RUNNABLE, CONTINUE_L);
145 assertFail("compiler.err.cont.outside.loop", INT_FN, CONTINUE_N);
146 assertFail("compiler.err.undef.label", INT_FN, BREAK_L);
147 assertFail("compiler.err.undef.label", INT_FN, CONTINUE_L);
148 assertFail("compiler.err.undef.label", LABEL, BLOCK, RUNNABLE, BREAK_L);
149 assertFail("compiler.err.undef.label", LABEL, BLOCK, RUNNABLE, CONTINUE_L);
150 assertFail("compiler.err.undef.label", LABEL, BLOCK, INT_FN, BREAK_L);
151 assertFail("compiler.err.undef.label", LABEL, BLOCK, INT_FN, CONTINUE_L);
152 }
153
154 public void testEswitch() {
155 //Int-valued switch expressions
156 assertOK(ESWITCH_Z, YIELD_Z);
157 assertOK(LABEL, BLOCK, ESWITCH_Z, YIELD_Z);
158 assertFail("compiler.err.break.outside.switch.expression", ESWITCH_Z, BREAK_N);
159 assertFail("compiler.err.prob.found.req", ESWITCH_Z, YIELD_S);
160 assertFail("compiler.err.undef.label", ESWITCH_Z, BREAK_L);
161 assertFail("compiler.err.break.outside.switch.expression", LABEL, BLOCK, ESWITCH_Z, BREAK_L);
162 assertFail("compiler.err.undef.label", ESWITCH_Z, CONTINUE_L);
163 assertFail("compiler.err.continue.outside.switch.expression", ESWITCH_Z, CONTINUE_N);
164 assertFail("compiler.err.return.outside.switch.expression", ESWITCH_Z, RETURN_N);
165 assertFail("compiler.err.return.outside.switch.expression", ESWITCH_Z, RETURN_Z);
166
167 assertOK(INT_ESWITCH_DEFAULT, YIELD_Z);
168 assertFail("compiler.err.break.outside.switch.expression", INT_ESWITCH_DEFAULT, BREAK_N);
169 assertFail("compiler.err.prob.found.req", INT_ESWITCH_DEFAULT, YIELD_S);
170 assertFail("compiler.err.undef.label", INT_ESWITCH_DEFAULT, BREAK_L);
171
172
173 // String-valued switch expressions
174 assertOK(ESWITCH_S, YIELD_S);
175 assertOK(LABEL, BLOCK, ESWITCH_S, YIELD_S);
176 assertFail("compiler.err.break.outside.switch.expression", ESWITCH_S, BREAK_N);
177 assertFail("compiler.err.prob.found.req", ESWITCH_S, YIELD_Z);
178 assertFail("compiler.err.undef.label", ESWITCH_S, BREAK_L);
179 assertFail("compiler.err.break.outside.switch.expression", LABEL, BLOCK, ESWITCH_S, BREAK_L);
180 assertFail("compiler.err.undef.label", ESWITCH_S, CONTINUE_L);
181 assertFail("compiler.err.continue.outside.switch.expression", ESWITCH_S, CONTINUE_N);
182 assertFail("compiler.err.return.outside.switch.expression", ESWITCH_S, RETURN_N);
183 assertFail("compiler.err.return.outside.switch.expression", ESWITCH_S, RETURN_S);
184 // Function-valued switch expression
185 assertOK(INT_FN_ESWITCH, YIELD_INT_FN);
186 assertFail("compiler.err.break.outside.switch.expression", INT_FN_ESWITCH, BREAK_N);
187 assertFail("compiler.err.prob.found.req", INT_FN_ESWITCH, YIELD_Z);
188 assertFail("compiler.err.prob.found.req", INT_FN_ESWITCH, YIELD_S);
189
190 assertFail("compiler.err.undef.label", INT_FN_ESWITCH, BREAK_L);
191 assertFail("compiler.err.break.outside.switch.expression", LABEL, BLOCK, INT_FN_ESWITCH, BREAK_L);
192 assertFail("compiler.err.undef.label", INT_FN_ESWITCH, CONTINUE_L);
193 assertFail("compiler.err.continue.outside.switch.expression", INT_FN_ESWITCH, CONTINUE_N);
194 assertFail("compiler.err.return.outside.switch.expression", INT_FN_ESWITCH, RETURN_N);
195 assertFail("compiler.err.return.outside.switch.expression", INT_FN_ESWITCH, RETURN_S);
196
197 }
198
199 public void testNestedInExpSwitch() {
200 assertOK(ESWITCH_Z, IF, YIELD_Z);
201 assertOK(ESWITCH_Z, BLOCK, YIELD_Z);
202 //
203 assertOK(ESWITCH_Z, IF, IF, YIELD_Z);
204 assertOK(ESWITCH_Z, IF, BLOCK, YIELD_Z);
205 assertOK(ESWITCH_Z, BLOCK, IF, YIELD_Z);
206 assertOK(ESWITCH_Z, BLOCK, BLOCK, YIELD_Z);
207 //
208 assertOK(ESWITCH_Z, IF, IF, IF, YIELD_Z);
209 assertOK(ESWITCH_Z, IF, IF, BLOCK, YIELD_Z);
210 assertOK(ESWITCH_Z, IF, BLOCK, IF, YIELD_Z);
211 assertOK(ESWITCH_Z, IF, BLOCK, BLOCK, YIELD_Z);
212 assertOK(ESWITCH_Z, BLOCK, IF, IF, YIELD_Z);
213 assertOK(ESWITCH_Z, BLOCK, IF, BLOCK, YIELD_Z);
214 assertOK(ESWITCH_Z, BLOCK, BLOCK, IF, YIELD_Z);
215 assertOK(ESWITCH_Z, BLOCK, BLOCK, BLOCK, YIELD_Z);
216 //
217 assertOK(ESWITCH_Z, YIELD_Z, SSWITCH, YIELD_Z);
218 assertOK(ESWITCH_Z, YIELD_Z, FOR, YIELD_Z);
219 assertOK(ESWITCH_Z, YIELD_Z, WHILE, YIELD_Z);
220 assertOK(ESWITCH_Z, YIELD_Z, DO, YIELD_Z);
221 assertFail("compiler.err.no.switch.expression", ESWITCH_Z, INT_FN, YIELD_Z);
222 assertOK(ESWITCH_Z, YIELD_Z, SSWITCH, IF, YIELD_Z);
223 assertOK(ESWITCH_Z, YIELD_Z, FOR, IF, YIELD_Z);
224 assertOK(ESWITCH_Z, YIELD_Z, WHILE, IF, YIELD_Z);
225 assertOK(ESWITCH_Z, YIELD_Z, DO, IF, YIELD_Z);
226 assertOK(ESWITCH_Z, YIELD_Z, BLOCK, SSWITCH, IF, YIELD_Z);
227 assertOK(ESWITCH_Z, YIELD_Z, BLOCK, FOR, IF, YIELD_Z);
228 assertOK(ESWITCH_Z, YIELD_Z, BLOCK, WHILE, IF, YIELD_Z);
229 assertOK(ESWITCH_Z, YIELD_Z, BLOCK, DO, IF, YIELD_Z);
230 }
231
232 public void testBreakExpressionLabelDisambiguation() {
233 assertOK(DEF_LABEL_VAR, ESWITCH_Z, YIELD_L);
234 assertFail("compiler.err.undef.label", DEF_LABEL_VAR, ESWITCH_Z, BREAK_L);
235 assertFail("compiler.err.break.outside.switch.expression", LABEL, FOR, BLOCK, DEF_LABEL_VAR, ESWITCH_Z, BREAK_L);
236 assertOK(DEF_LABEL_VAR, ESWITCH_Z, YIELD_Z, LABEL, FOR, BREAK_L); //label break
237 assertFail("compiler.err.break.outside.switch.expression", DEF_LABEL_VAR, LABEL, BLOCK, ESWITCH_Z, BREAK_L);
238 assertOK(DEF_LABEL_VAR, LABEL, BLOCK, ESWITCH_Z, YIELD_L); //expression break
239 //
240 }
241
242 public void testFunReturningSwitchExp() {
243 assertOK(INT_FN_ESWITCH, YIELD_INT_FN);
244 }
245
246 public void testContinueLoops() {
247 assertOK(LABEL, FOR, CONTINUE_L);
248 assertOK(LABEL, FOR_EACH, CONTINUE_L);
249 assertOK(LABEL, WHILE, CONTINUE_L);
250 assertOK(LABEL, DO, CONTINUE_L);
251 assertFail("compiler.err.not.loop.label", LABEL, CONTINUE_L);
252 }
253 }