1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/LambdaParserTest.java Mon Nov 28 15:56:42 2011 +0000
1.3 @@ -0,0 +1,276 @@
1.4 +/*
1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @bug 7115050
1.30 + * @summary Add parser support for lambda expressions
1.31 + */
1.32 +
1.33 +import com.sun.source.util.JavacTask;
1.34 +import java.net.URI;
1.35 +import java.util.Arrays;
1.36 +import javax.tools.Diagnostic;
1.37 +import javax.tools.JavaCompiler;
1.38 +import javax.tools.JavaFileObject;
1.39 +import javax.tools.SimpleJavaFileObject;
1.40 +import javax.tools.StandardJavaFileManager;
1.41 +import javax.tools.ToolProvider;
1.42 +
1.43 +public class LambdaParserTest {
1.44 +
1.45 + static int checkCount = 0;
1.46 +
1.47 + enum LambdaKind {
1.48 + NILARY_EXPR("()->x"),
1.49 + NILARY_STMT("()->{ return x; }"),
1.50 + ONEARY_SHORT_EXPR("x->x"),
1.51 + ONEARY_SHORT_STMT("x->{ return x; }"),
1.52 + ONEARY_EXPR("(#M1 #T1 x)->x"),
1.53 + ONEARY_STMT("(#M1 #T1 x)->{ return x; }"),
1.54 + TWOARY_EXPR("(#M1 #T1 x, #M2 #T2 y)->x"),
1.55 + TWOARY_STMT("(#M1 #T1 x, #M2 #T2 y)->{ return x; }");
1.56 +
1.57 + String lambdaTemplate;
1.58 +
1.59 + LambdaKind(String lambdaTemplate) {
1.60 + this.lambdaTemplate = lambdaTemplate;
1.61 + }
1.62 +
1.63 + String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
1.64 + ModifierKind mk1, ModifierKind mk2) {
1.65 + return lambdaTemplate.replaceAll("#M1", mk1.modifier)
1.66 + .replaceAll("#M2", mk2.modifier)
1.67 + .replaceAll("#T1", pk1.parameterType)
1.68 + .replaceAll("#T2", pk2.parameterType);
1.69 + }
1.70 +
1.71 + int arity() {
1.72 + switch (this) {
1.73 + case NILARY_EXPR:
1.74 + case NILARY_STMT: return 0;
1.75 + case ONEARY_SHORT_EXPR:
1.76 + case ONEARY_SHORT_STMT:
1.77 + case ONEARY_EXPR:
1.78 + case ONEARY_STMT: return 1;
1.79 + case TWOARY_EXPR:
1.80 + case TWOARY_STMT: return 2;
1.81 + default: throw new AssertionError("Invalid lambda kind " + this);
1.82 + }
1.83 + }
1.84 +
1.85 + boolean isShort() {
1.86 + return this == ONEARY_SHORT_EXPR ||
1.87 + this == ONEARY_SHORT_STMT;
1.88 + }
1.89 + }
1.90 +
1.91 + enum LambdaParameterKind {
1.92 + IMPLICIT(""),
1.93 + EXPLIICT_SIMPLE("A"),
1.94 + EXPLICIT_VARARGS("A..."),
1.95 + EXPLICIT_GENERIC1("A<X>"),
1.96 + EXPLICIT_GENERIC3("A<? extends X, ? super Y>");
1.97 +
1.98 + String parameterType;
1.99 +
1.100 + LambdaParameterKind(String parameterType) {
1.101 + this.parameterType = parameterType;
1.102 + }
1.103 +
1.104 + boolean explicit() {
1.105 + return this != IMPLICIT;
1.106 + }
1.107 + }
1.108 +
1.109 + enum ModifierKind {
1.110 + NONE(""),
1.111 + FINAL("final"),
1.112 + PUBLIC("public");
1.113 +
1.114 + String modifier;
1.115 +
1.116 + ModifierKind(String modifier) {
1.117 + this.modifier = modifier;
1.118 + }
1.119 +
1.120 + boolean compatibleWith(LambdaParameterKind pk) {
1.121 + switch (this) {
1.122 + case PUBLIC: return false;
1.123 + case FINAL: return pk != LambdaParameterKind.IMPLICIT;
1.124 + case NONE: return true;
1.125 + default: throw new AssertionError("Invalid modifier kind " + this);
1.126 + }
1.127 + }
1.128 + }
1.129 +
1.130 + enum ExprKind {
1.131 + NONE("#L#S"),
1.132 + SINGLE_PAREN1("(#L#S)"),
1.133 + SINGLE_PAREN2("(#L)#S"),
1.134 + DOUBLE_PAREN1("((#L#S))"),
1.135 + DOUBLE_PAREN2("((#L)#S)"),
1.136 + DOUBLE_PAREN3("((#L))#S");
1.137 +
1.138 + String expressionTemplate;
1.139 +
1.140 + ExprKind(String expressionTemplate) {
1.141 + this.expressionTemplate = expressionTemplate;
1.142 + }
1.143 +
1.144 + String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
1.145 + ModifierKind mk1, ModifierKind mk2, LambdaKind lk, SubExprKind sk) {
1.146 + return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2))
1.147 + .replaceAll("#S", sk.subExpression);
1.148 + }
1.149 + }
1.150 +
1.151 + enum SubExprKind {
1.152 + NONE(""),
1.153 + SELECT_FIELD(".f"),
1.154 + SELECT_METHOD(".f()"),
1.155 + SELECT_NEW(".new Foo()"),
1.156 + POSTINC("++"),
1.157 + POSTDEC("--");
1.158 +
1.159 + String subExpression;
1.160 +
1.161 + SubExprKind(String subExpression) {
1.162 + this.subExpression = subExpression;
1.163 + }
1.164 + }
1.165 +
1.166 + public static void main(String... args) throws Exception {
1.167 +
1.168 + //create default shared JavaCompiler - reused across multiple compilations
1.169 + JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
1.170 + StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
1.171 +
1.172 + for (LambdaKind lk : LambdaKind.values()) {
1.173 + for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
1.174 + if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT) continue;
1.175 + for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
1.176 + if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT) continue;
1.177 + for (ModifierKind mk1 : ModifierKind.values()) {
1.178 + if (mk1 != ModifierKind.NONE && lk.isShort()) continue;
1.179 + if (lk.arity() < 1 && mk1 != ModifierKind.NONE) continue;
1.180 + for (ModifierKind mk2 : ModifierKind.values()) {
1.181 + if (lk.arity() < 2 && mk2 != ModifierKind.NONE) continue;
1.182 + for (SubExprKind sk : SubExprKind.values()) {
1.183 + for (ExprKind ek : ExprKind.values()) {
1.184 + new LambdaParserTest(pk1, pk2, mk1, mk2, lk, sk, ek)
1.185 + .run(comp, fm);
1.186 + }
1.187 + }
1.188 + }
1.189 + }
1.190 + }
1.191 + }
1.192 + }
1.193 + System.out.println("Total check executed: " + checkCount);
1.194 + }
1.195 +
1.196 + LambdaParameterKind pk1;
1.197 + LambdaParameterKind pk2;
1.198 + ModifierKind mk1;
1.199 + ModifierKind mk2;
1.200 + LambdaKind lk;
1.201 + SubExprKind sk;
1.202 + ExprKind ek;
1.203 + JavaSource source;
1.204 + DiagnosticChecker diagChecker;
1.205 +
1.206 + LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2, ModifierKind mk1,
1.207 + ModifierKind mk2, LambdaKind lk, SubExprKind sk, ExprKind ek) {
1.208 + this.pk1 = pk1;
1.209 + this.pk2 = pk2;
1.210 + this.mk1 = mk1;
1.211 + this.mk2 = mk2;
1.212 + this.lk = lk;
1.213 + this.sk = sk;
1.214 + this.ek = ek;
1.215 + this.source = new JavaSource();
1.216 + this.diagChecker = new DiagnosticChecker();
1.217 + }
1.218 +
1.219 + class JavaSource extends SimpleJavaFileObject {
1.220 +
1.221 + String template = "class Test {\n" +
1.222 + " SAM s = #E;\n" +
1.223 + "}";
1.224 +
1.225 + String source;
1.226 +
1.227 + public JavaSource() {
1.228 + super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
1.229 + source = template.replaceAll("#E", ek.expressionString(pk1, pk2, mk1, mk2, lk, sk));
1.230 + }
1.231 +
1.232 + @Override
1.233 + public CharSequence getCharContent(boolean ignoreEncodingErrors) {
1.234 + return source;
1.235 + }
1.236 + }
1.237 +
1.238 + void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
1.239 + JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
1.240 + Arrays.asList("-XDallowLambda"), null, Arrays.asList(source));
1.241 + try {
1.242 + ct.parse();
1.243 + } catch (Throwable ex) {
1.244 + throw new AssertionError("Error thron when parsing the following source:\n" + source.getCharContent(true));
1.245 + }
1.246 + check();
1.247 + }
1.248 +
1.249 + void check() {
1.250 + checkCount++;
1.251 +
1.252 + boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
1.253 + (lk.arity() > 1 && !mk2.compatibleWith(pk2));
1.254 +
1.255 + if (lk.arity() == 2 &&
1.256 + (pk1.explicit() != pk2.explicit() ||
1.257 + pk1 == LambdaParameterKind.EXPLICIT_VARARGS)) {
1.258 + errorExpected = true;
1.259 + }
1.260 +
1.261 + if (errorExpected != diagChecker.errorFound) {
1.262 + throw new Error("invalid diagnostics for source:\n" +
1.263 + source.getCharContent(true) +
1.264 + "\nFound error: " + diagChecker.errorFound +
1.265 + "\nExpected error: " + errorExpected);
1.266 + }
1.267 + }
1.268 +
1.269 + static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
1.270 +
1.271 + boolean errorFound;
1.272 +
1.273 + public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
1.274 + if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
1.275 + errorFound = true;
1.276 + }
1.277 + }
1.278 + }
1.279 +}
