1 /* 2 * Copyright (c) 2011, 2017, 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 7025809 8028543 6415644 8028544 8029942 8193291 27 * @summary Test latest, latestSupported, underscore as keyword, etc. 28 * @author Joseph D. Darcy 29 * @modules java.compiler 30 * jdk.compiler 31 */ 32 33 import java.util.*; 34 import javax.lang.model.SourceVersion; 35 import static javax.lang.model.SourceVersion.*; 36 37 /** 38 * Verify latest[Supported] behavior. 39 */ 40 public class TestSourceVersion { 41 public static void main(String... args) { 42 testLatestSupported(); 43 testVersionVaryingKeywords(); 44 testRestrictedKeywords(); 45 } 46 47 private static void testLatestSupported() { 48 if (SourceVersion.latest() != RELEASE_11 || 49 SourceVersion.latestSupported() != RELEASE_10) 50 throw new RuntimeException("Unexpected release value(s) found:\n" + 51 "latest:\t" + SourceVersion.latest() + "\n" + 52 "latestSupported:\t" + SourceVersion.latestSupported()); 53 } 54 55 private static void testVersionVaryingKeywords() { 56 Map<String, SourceVersion> keyWordStart = 57 Map.of("strictfp", RELEASE_2, 58 "assert", RELEASE_4, 59 "enum", RELEASE_5, 60 "_", RELEASE_9); 61 62 for (Map.Entry<String, SourceVersion> entry : keyWordStart.entrySet()) { 63 String key = entry.getKey(); 64 SourceVersion value = entry.getValue(); 65 66 check(true, isKeyword(key), "keyword", latest()); 67 check(false, isName(key), "name", latest()); 68 69 for(SourceVersion version : SourceVersion.values()) { 70 boolean isKeyword = version.compareTo(value) >= 0; 71 72 check(isKeyword, isKeyword(key, version), "keyword", version); 73 check(!isKeyword, isName(key, version), "name", version); 74 } 75 } 76 } 77 78 private static void testRestrictedKeywords() { 79 // Restricted keywords are not full keywords 80 81 /* 82 * JLS 3.9 83 * " A further ten character sequences are restricted 84 * keywords: open, module, requires, transitive, exports, 85 * opens, to, uses, provides, and with" 86 */ 87 Set<String> restrictedKeywords = 88 Set.of("open", "module", "requires", "transitive", "exports", 89 "opens", "to", "uses", "provides", "with"); 90 91 for(String key : restrictedKeywords) { 92 for(SourceVersion version : SourceVersion.values()) { 93 check(false, isKeyword(key, version), "keyword", version); 94 check(true, isName(key, version), "name", version); 95 } 96 } 97 } 98 99 private static void check(boolean result, boolean expected, 100 String message, SourceVersion version) { 101 if (result != expected) { 102 throw new RuntimeException("Unexpected " + message + "-ness of _ on " + version); 103 } 104 } 105 }