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 8187982 8187951 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 testVar(); 46 } 47 48 private static void testLatestSupported() { 49 if (SourceVersion.latest() != RELEASE_10 || 50 SourceVersion.latestSupported() != RELEASE_10) 51 throw new RuntimeException("Unexpected release value(s) found:\n" + 52 "latest:\t" + SourceVersion.latest() + "\n" + 53 "latestSupported:\t" + SourceVersion.latestSupported()); 54 } 55 56 private static void testVersionVaryingKeywords() { 57 Map<String, SourceVersion> keyWordStart = 58 Map.of("strictfp", RELEASE_2, 59 "assert", RELEASE_4, 60 "enum", RELEASE_5, 61 "_", RELEASE_9); 62 63 for (Map.Entry<String, SourceVersion> entry : keyWordStart.entrySet()) { 64 String key = entry.getKey(); 65 SourceVersion value = entry.getValue(); 66 67 check(true, isKeyword(key), "keyword", latest()); 68 check(false, isName(key), "name", latest()); 69 70 for(SourceVersion version : SourceVersion.values()) { 71 boolean isKeyword = version.compareTo(value) >= 0; 72 73 check(isKeyword, isKeyword(key, version), "keyword", version); 74 check(!isKeyword, isName(key, version), "name", version); 75 } 76 } 77 } 78 79 private static void testRestrictedKeywords() { 80 // Restricted keywords are not full keywords 81 82 /* 83 * JLS 3.9 84 * " A further ten character sequences are restricted 85 * keywords: open, module, requires, transitive, exports, 86 * opens, to, uses, provides, and with" 87 */ 88 Set<String> restrictedKeywords = 89 Set.of("open", "module", "requires", "transitive", "exports", 90 "opens", "to", "uses", "provides", "with"); 91 92 for(String key : restrictedKeywords) { 93 for(SourceVersion version : SourceVersion.values()) { 94 check(false, isKeyword(key, version), "keyword", version); 95 check(true, isName(key, version), "name", version); 96 } 97 } 98 } 99 100 private static void testVar() { 101 102 for(SourceVersion version : SourceVersion.values()) { 103 check(false, isKeyword("var", version), "keyword", version); 104 check(false, isKeyword("foo.var", version), "keyword", version); 105 check(false, isKeyword("var.foo", version), "keyword", version); 106 107 // The string "var" doesn't have special handling until release 10. 108 boolean lessThan10 = version.compareTo(RELEASE_10) < 0; 109 check(lessThan10, isName("var", version), "name", version); 110 check(lessThan10, isName("foo.var", version), "name", version); 111 check(true, isName("var.foo", version), "name", version); 112 } 113 } 114 115 private static void check(boolean result, boolean expected, 116 String message, SourceVersion version) { 117 if (result != expected) { 118 throw new RuntimeException("Unexpected " + message + "-ness of _ on " + version); 119 } 120 } 121 }