--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/lambda/LambdaParserTest.java Mon Nov 28 15:56:42 2011 +0000
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2011, 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 7115050
+ * @summary Add parser support for lambda expressions
+ */
+
+import com.sun.source.util.JavacTask;
+import java.net.URI;
+import java.util.Arrays;
+import javax.tools.Diagnostic;
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.SimpleJavaFileObject;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+public class LambdaParserTest {
+
+ static int checkCount = 0;
+
+ enum LambdaKind {
+ NILARY_EXPR("()->x"),
+ NILARY_STMT("()->{ return x; }"),
+ ONEARY_SHORT_EXPR("x->x"),
+ ONEARY_SHORT_STMT("x->{ return x; }"),
+ ONEARY_EXPR("(#M1 #T1 x)->x"),
+ ONEARY_STMT("(#M1 #T1 x)->{ return x; }"),
+ TWOARY_EXPR("(#M1 #T1 x, #M2 #T2 y)->x"),
+ TWOARY_STMT("(#M1 #T1 x, #M2 #T2 y)->{ return x; }");
+
+ String lambdaTemplate;
+
+ LambdaKind(String lambdaTemplate) {
+ this.lambdaTemplate = lambdaTemplate;
+ }
+
+ String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
+ ModifierKind mk1, ModifierKind mk2) {
+ return lambdaTemplate.replaceAll("#M1", mk1.modifier)
+ .replaceAll("#M2", mk2.modifier)
+ .replaceAll("#T1", pk1.parameterType)
+ .replaceAll("#T2", pk2.parameterType);
+ }
+
+ int arity() {
+ switch (this) {
+ case NILARY_EXPR:
+ case NILARY_STMT: return 0;
+ case ONEARY_SHORT_EXPR:
+ case ONEARY_SHORT_STMT:
+ case ONEARY_EXPR:
+ case ONEARY_STMT: return 1;
+ case TWOARY_EXPR:
+ case TWOARY_STMT: return 2;
+ default: throw new AssertionError("Invalid lambda kind " + this);
+ }
+ }
+
+ boolean isShort() {
+ return this == ONEARY_SHORT_EXPR ||
+ this == ONEARY_SHORT_STMT;
+ }
+ }
+
+ enum LambdaParameterKind {
+ IMPLICIT(""),
+ EXPLIICT_SIMPLE("A"),
+ EXPLICIT_VARARGS("A..."),
+ EXPLICIT_GENERIC1("A<X>"),
+ EXPLICIT_GENERIC3("A<? extends X, ? super Y>");
+
+ String parameterType;
+
+ LambdaParameterKind(String parameterType) {
+ this.parameterType = parameterType;
+ }
+
+ boolean explicit() {
+ return this != IMPLICIT;
+ }
+ }
+
+ enum ModifierKind {
+ NONE(""),
+ FINAL("final"),
+ PUBLIC("public");
+
+ String modifier;
+
+ ModifierKind(String modifier) {
+ this.modifier = modifier;
+ }
+
+ boolean compatibleWith(LambdaParameterKind pk) {
+ switch (this) {
+ case PUBLIC: return false;
+ case FINAL: return pk != LambdaParameterKind.IMPLICIT;
+ case NONE: return true;
+ default: throw new AssertionError("Invalid modifier kind " + this);
+ }
+ }
+ }
+
+ enum ExprKind {
+ NONE("#L#S"),
+ SINGLE_PAREN1("(#L#S)"),
+ SINGLE_PAREN2("(#L)#S"),
+ DOUBLE_PAREN1("((#L#S))"),
+ DOUBLE_PAREN2("((#L)#S)"),
+ DOUBLE_PAREN3("((#L))#S");
+
+ String expressionTemplate;
+
+ ExprKind(String expressionTemplate) {
+ this.expressionTemplate = expressionTemplate;
+ }
+
+ String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
+ ModifierKind mk1, ModifierKind mk2, LambdaKind lk, SubExprKind sk) {
+ return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2))
+ .replaceAll("#S", sk.subExpression);
+ }
+ }
+
+ enum SubExprKind {
+ NONE(""),
+ SELECT_FIELD(".f"),
+ SELECT_METHOD(".f()"),
+ SELECT_NEW(".new Foo()"),
+ POSTINC("++"),
+ POSTDEC("--");
+
+ String subExpression;
+
+ SubExprKind(String subExpression) {
+ this.subExpression = subExpression;
+ }
+ }
+
+ public static void main(String... args) throws Exception {
+
+ //create default shared JavaCompiler - reused across multiple compilations
+ JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
+ StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
+
+ for (LambdaKind lk : LambdaKind.values()) {
+ for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
+ if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT) continue;
+ for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
+ if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT) continue;
+ for (ModifierKind mk1 : ModifierKind.values()) {
+ if (mk1 != ModifierKind.NONE && lk.isShort()) continue;
+ if (lk.arity() < 1 && mk1 != ModifierKind.NONE) continue;
+ for (ModifierKind mk2 : ModifierKind.values()) {
+ if (lk.arity() < 2 && mk2 != ModifierKind.NONE) continue;
+ for (SubExprKind sk : SubExprKind.values()) {
+ for (ExprKind ek : ExprKind.values()) {
+ new LambdaParserTest(pk1, pk2, mk1, mk2, lk, sk, ek)
+ .run(comp, fm);
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+ System.out.println("Total check executed: " + checkCount);
+ }
+
+ LambdaParameterKind pk1;
+ LambdaParameterKind pk2;
+ ModifierKind mk1;
+ ModifierKind mk2;
+ LambdaKind lk;
+ SubExprKind sk;
+ ExprKind ek;
+ JavaSource source;
+ DiagnosticChecker diagChecker;
+
+ LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2, ModifierKind mk1,
+ ModifierKind mk2, LambdaKind lk, SubExprKind sk, ExprKind ek) {
+ this.pk1 = pk1;
+ this.pk2 = pk2;
+ this.mk1 = mk1;
+ this.mk2 = mk2;
+ this.lk = lk;
+ this.sk = sk;
+ this.ek = ek;
+ this.source = new JavaSource();
+ this.diagChecker = new DiagnosticChecker();
+ }
+
+ class JavaSource extends SimpleJavaFileObject {
+
+ String template = "class Test {\n" +
+ " SAM s = #E;\n" +
+ "}";
+
+ String source;
+
+ public JavaSource() {
+ super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
+ source = template.replaceAll("#E", ek.expressionString(pk1, pk2, mk1, mk2, lk, sk));
+ }
+
+ @Override
+ public CharSequence getCharContent(boolean ignoreEncodingErrors) {
+ return source;
+ }
+ }
+
+ void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
+ JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
+ Arrays.asList("-XDallowLambda"), null, Arrays.asList(source));
+ try {
+ ct.parse();
+ } catch (Throwable ex) {
+ throw new AssertionError("Error thron when parsing the following source:\n" + source.getCharContent(true));
+ }
+ check();
+ }
+
+ void check() {
+ checkCount++;
+
+ boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
+ (lk.arity() > 1 && !mk2.compatibleWith(pk2));
+
+ if (lk.arity() == 2 &&
+ (pk1.explicit() != pk2.explicit() ||
+ pk1 == LambdaParameterKind.EXPLICIT_VARARGS)) {
+ errorExpected = true;
+ }
+
+ if (errorExpected != diagChecker.errorFound) {
+ throw new Error("invalid diagnostics for source:\n" +
+ source.getCharContent(true) +
+ "\nFound error: " + diagChecker.errorFound +
+ "\nExpected error: " + errorExpected);
+ }
+ }
+
+ static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
+
+ boolean errorFound;
+
+ public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
+ if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
+ errorFound = true;
+ }
+ }
+ }
+}