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/*
* Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 7025809 8028543 6415644 8028544 8029942 8187951 8193291 8196551 8233096
* @summary Test latest, latestSupported, underscore as keyword, etc.
* @author Joseph D. Darcy
* @modules java.compiler
* jdk.compiler
*/
import java.util.*;
import java.util.function.Predicate;
import javax.lang.model.SourceVersion;
import static javax.lang.model.SourceVersion.*;
/**
* Verify behavior of latest[Supported] and other methods.
*/
public class TestSourceVersion {
public static void main(String... args) {
testLatestSupported();
testVersionVaryingKeywords();
testRestrictedKeywords();
testVar();
testYield();
}
private static void testLatestSupported() {
SourceVersion[] values = SourceVersion.values();
SourceVersion last = values[values.length - 1];
SourceVersion latest = SourceVersion.latest();
SourceVersion latestSupported = SourceVersion.latestSupported();
if (latest == last &&
latestSupported == SourceVersion.valueOf("RELEASE_" +
Runtime.version().feature()) &&
(latest == latestSupported ||
(latest.ordinal() - latestSupported.ordinal() == 1)) )
return;
else {
throw new RuntimeException("Unexpected release value(s) found:\n" +
"latest:\t" + latest + "\n" +
"latestSupported:\t" + latestSupported);
}
}
private static void testVersionVaryingKeywords() {
Map<String, SourceVersion> keyWordStart =
Map.of("strictfp", RELEASE_2,
"assert", RELEASE_4,
"enum", RELEASE_5,
"_", RELEASE_9);
for (Map.Entry<String, SourceVersion> entry : keyWordStart.entrySet()) {
String key = entry.getKey();
SourceVersion value = entry.getValue();
check(true, key, (String s) -> isKeyword(s), "keyword", latest());
check(false, key, (String s) -> isName(s), "name", latest());
for(SourceVersion version : SourceVersion.values()) {
boolean isKeyword = version.compareTo(value) >= 0;
check(isKeyword, key, (String s) -> isKeyword(s, version), "keyword", version);
check(!isKeyword, key, (String s) -> isName(s, version), "name", version);
}
}
}
private static void testRestrictedKeywords() {
// Restricted keywords are not full keywords
/*
* JLS 3.9
* " A further ten character sequences are restricted
* keywords: open, module, requires, transitive, exports,
* opens, to, uses, provides, and with"
*/
Set<String> restrictedKeywords =
Set.of("open", "module", "requires", "transitive", "exports",
"opens", "to", "uses", "provides", "with",
// Assume "record" and "sealed" will be restricted keywords.
"record", "sealed");
for (String key : restrictedKeywords) {
for (SourceVersion version : SourceVersion.values()) {
check(false, key, (String s) -> isKeyword(s, version), "keyword", version);
check(true, key, (String s) -> isName(s, version), "name", version);
}
}
}
private static void testVar() {
for (SourceVersion version : SourceVersion.values()) {
Predicate<String> isKeywordVersion = (String s) -> isKeyword(s, version);
Predicate<String> isNameVersion = (String s) -> isName(s, version);
for (String name : List.of("var", "foo.var", "var.foo")) {
check(false, name, isKeywordVersion, "keyword", version);
check(true, name, isNameVersion, "name", version);
}
}
}
private static void testYield() {
for (SourceVersion version : SourceVersion.values()) {
Predicate<String> isKeywordVersion = (String s) -> isKeyword(s, version);
Predicate<String> isNameVersion = (String s) -> isName(s, version);
for (String name : List.of("yield", "foo.yield", "yield.foo")) {
check(false, name, isKeywordVersion, "keyword", version);
check(true, name, isNameVersion, "name", version);
}
}
}
private static void check(boolean expected,
String input,
Predicate<String> predicate,
String message,
SourceVersion version) {
boolean result = predicate.test(input);
if (result != expected) {
throw new RuntimeException("Unexpected " + message + "-ness of " + input +
" on " + version);
}
}
}
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