aoqi@0: /*
aoqi@0:  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 7115050 8003280 8005852 8006694
aoqi@0:  * @summary Add lambda tests
aoqi@0:  *  Add parser support for lambda expressions
aoqi@0:  *  temporarily workaround combo tests are causing time out in several platforms
aoqi@0:  * @library ../lib
aoqi@0:  * @build JavacTestingAbstractThreadedTest
aoqi@0:  * @run main/othervm LambdaParserTest
aoqi@0:  */
aoqi@0: 
aoqi@0: // use /othervm to avoid jtreg timeout issues (CODETOOLS-7900047)
aoqi@0: // see JDK-8006746
aoqi@0: 
aoqi@0: import java.net.URI;
aoqi@0: import java.util.Arrays;
aoqi@0: import javax.tools.Diagnostic;
aoqi@0: import javax.tools.JavaFileObject;
aoqi@0: import javax.tools.SimpleJavaFileObject;
aoqi@0: import com.sun.source.util.JavacTask;
aoqi@0: 
aoqi@0: public class LambdaParserTest
aoqi@0:     extends JavacTestingAbstractThreadedTest
aoqi@0:     implements Runnable {
aoqi@0: 
aoqi@0:     enum LambdaKind {
aoqi@0:         NILARY_EXPR("()->x"),
aoqi@0:         NILARY_STMT("()->{ return x; }"),
aoqi@0:         ONEARY_SHORT_EXPR("#PN->x"),
aoqi@0:         ONEARY_SHORT_STMT("#PN->{ return x; }"),
aoqi@0:         ONEARY_EXPR("(#M1 #T1 #PN)->x"),
aoqi@0:         ONEARY_STMT("(#M1 #T1 #PN)->{ return x; }"),
aoqi@0:         TWOARY_EXPR("(#M1 #T1 #PN, #M2 #T2 y)->x"),
aoqi@0:         TWOARY_STMT("(#M1 #T1 #PN, #M2 #T2 y)->{ return x; }");
aoqi@0: 
aoqi@0:         String lambdaTemplate;
aoqi@0: 
aoqi@0:         LambdaKind(String lambdaTemplate) {
aoqi@0:             this.lambdaTemplate = lambdaTemplate;
aoqi@0:         }
aoqi@0: 
aoqi@0:         String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
aoqi@0:                 ModifierKind mk1, ModifierKind mk2, LambdaParameterName pn) {
aoqi@0:             return lambdaTemplate.replaceAll("#M1", mk1.modifier)
aoqi@0:                     .replaceAll("#M2", mk2.modifier)
aoqi@0:                     .replaceAll("#T1", pk1.parameterType)
aoqi@0:                     .replaceAll("#T2", pk2.parameterType)
aoqi@0:                     .replaceAll("#PN", pn.nameStr);
aoqi@0:         }
aoqi@0: 
aoqi@0:         int arity() {
aoqi@0:             switch (this) {
aoqi@0:                 case NILARY_EXPR:
aoqi@0:                 case NILARY_STMT: return 0;
aoqi@0:                 case ONEARY_SHORT_EXPR:
aoqi@0:                 case ONEARY_SHORT_STMT:
aoqi@0:                 case ONEARY_EXPR:
aoqi@0:                 case ONEARY_STMT: return 1;
aoqi@0:                 case TWOARY_EXPR:
aoqi@0:                 case TWOARY_STMT: return 2;
aoqi@0:                 default: throw new AssertionError("Invalid lambda kind " + this);
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         boolean isShort() {
aoqi@0:             return this == ONEARY_SHORT_EXPR ||
aoqi@0:                     this == ONEARY_SHORT_STMT;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum LambdaParameterName {
aoqi@0:         IDENT("x"),
aoqi@0:         UNDERSCORE("_");
aoqi@0: 
aoqi@0:         String nameStr;
aoqi@0: 
aoqi@0:         LambdaParameterName(String nameStr) {
aoqi@0:             this.nameStr = nameStr;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum LambdaParameterKind {
aoqi@0:         IMPLICIT(""),
aoqi@0:         EXPLIICT_SIMPLE("A"),
aoqi@0:         EXPLIICT_SIMPLE_ARR1("A[]"),
aoqi@0:         EXPLIICT_SIMPLE_ARR2("A[][]"),
aoqi@0:         EXPLICIT_VARARGS("A..."),
aoqi@0:         EXPLICIT_GENERIC1("A<X>"),
aoqi@0:         EXPLICIT_GENERIC2("A<? extends X, ? super Y>"),
aoqi@0:         EXPLICIT_GENERIC2_VARARGS("A<? extends X, ? super Y>..."),
aoqi@0:         EXPLICIT_GENERIC2_ARR1("A<? extends X, ? super Y>[]"),
aoqi@0:         EXPLICIT_GENERIC2_ARR2("A<? extends X, ? super Y>[][]");
aoqi@0: 
aoqi@0:         String parameterType;
aoqi@0: 
aoqi@0:         LambdaParameterKind(String parameterType) {
aoqi@0:             this.parameterType = parameterType;
aoqi@0:         }
aoqi@0: 
aoqi@0:         boolean explicit() {
aoqi@0:             return this != IMPLICIT;
aoqi@0:         }
aoqi@0: 
aoqi@0:         boolean isVarargs() {
aoqi@0:             return this == EXPLICIT_VARARGS ||
aoqi@0:                     this == EXPLICIT_GENERIC2_VARARGS;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum ModifierKind {
aoqi@0:         NONE(""),
aoqi@0:         FINAL("final"),
aoqi@0:         PUBLIC("public");
aoqi@0: 
aoqi@0:         String modifier;
aoqi@0: 
aoqi@0:         ModifierKind(String modifier) {
aoqi@0:             this.modifier = modifier;
aoqi@0:         }
aoqi@0: 
aoqi@0:         boolean compatibleWith(LambdaParameterKind pk) {
aoqi@0:             switch (this) {
aoqi@0:                 case PUBLIC: return false;
aoqi@0:                 case FINAL: return pk != LambdaParameterKind.IMPLICIT;
aoqi@0:                 case NONE: return true;
aoqi@0:                 default: throw new AssertionError("Invalid modifier kind " + this);
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum ExprKind {
aoqi@0:         NONE("#L#S"),
aoqi@0:         SINGLE_PAREN1("(#L#S)"),
aoqi@0:         SINGLE_PAREN2("(#L)#S"),
aoqi@0:         DOUBLE_PAREN1("((#L#S))"),
aoqi@0:         DOUBLE_PAREN2("((#L)#S)"),
aoqi@0:         DOUBLE_PAREN3("((#L))#S");
aoqi@0: 
aoqi@0:         String expressionTemplate;
aoqi@0: 
aoqi@0:         ExprKind(String expressionTemplate) {
aoqi@0:             this.expressionTemplate = expressionTemplate;
aoqi@0:         }
aoqi@0: 
aoqi@0:         String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
aoqi@0:                 ModifierKind mk1, ModifierKind mk2, LambdaKind lk, LambdaParameterName pn, SubExprKind sk) {
aoqi@0:             return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2, pn))
aoqi@0:                     .replaceAll("#S", sk.subExpression);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum SubExprKind {
aoqi@0:         NONE(""),
aoqi@0:         SELECT_FIELD(".f"),
aoqi@0:         SELECT_METHOD(".f()"),
aoqi@0:         SELECT_NEW(".new Foo()"),
aoqi@0:         POSTINC("++"),
aoqi@0:         POSTDEC("--");
aoqi@0: 
aoqi@0:         String subExpression;
aoqi@0: 
aoqi@0:         SubExprKind(String subExpression) {
aoqi@0:             this.subExpression = subExpression;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String... args) throws Exception {
aoqi@0:         for (LambdaKind lk : LambdaKind.values()) {
aoqi@0:             for (LambdaParameterName pn : LambdaParameterName.values()) {
aoqi@0:                 for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
aoqi@0:                     if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT)
aoqi@0:                         continue;
aoqi@0:                     for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
aoqi@0:                         if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT)
aoqi@0:                             continue;
aoqi@0:                         for (ModifierKind mk1 : ModifierKind.values()) {
aoqi@0:                             if (mk1 != ModifierKind.NONE && lk.isShort())
aoqi@0:                                 continue;
aoqi@0:                             if (lk.arity() < 1 && mk1 != ModifierKind.NONE)
aoqi@0:                                 continue;
aoqi@0:                             for (ModifierKind mk2 : ModifierKind.values()) {
aoqi@0:                                 if (lk.arity() < 2 && mk2 != ModifierKind.NONE)
aoqi@0:                                     continue;
aoqi@0:                                 for (SubExprKind sk : SubExprKind.values()) {
aoqi@0:                                     for (ExprKind ek : ExprKind.values()) {
aoqi@0:                                         pool.execute(
aoqi@0:                                             new LambdaParserTest(pk1, pk2, mk1,
aoqi@0:                                                                  mk2, lk, sk, ek, pn));
aoqi@0:                                     }
aoqi@0:                                 }
aoqi@0:                             }
aoqi@0:                         }
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         checkAfterExec();
aoqi@0:     }
aoqi@0: 
aoqi@0:     LambdaParameterKind pk1;
aoqi@0:     LambdaParameterKind pk2;
aoqi@0:     ModifierKind mk1;
aoqi@0:     ModifierKind mk2;
aoqi@0:     LambdaKind lk;
aoqi@0:     LambdaParameterName pn;
aoqi@0:     SubExprKind sk;
aoqi@0:     ExprKind ek;
aoqi@0:     JavaSource source;
aoqi@0:     DiagnosticChecker diagChecker;
aoqi@0: 
aoqi@0:     LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2,
aoqi@0:             ModifierKind mk1, ModifierKind mk2, LambdaKind lk,
aoqi@0:             SubExprKind sk, ExprKind ek, LambdaParameterName pn) {
aoqi@0:         this.pk1 = pk1;
aoqi@0:         this.pk2 = pk2;
aoqi@0:         this.mk1 = mk1;
aoqi@0:         this.mk2 = mk2;
aoqi@0:         this.lk = lk;
aoqi@0:         this.pn = pn;
aoqi@0:         this.sk = sk;
aoqi@0:         this.ek = ek;
aoqi@0:         this.source = new JavaSource();
aoqi@0:         this.diagChecker = new DiagnosticChecker();
aoqi@0:     }
aoqi@0: 
aoqi@0:     class JavaSource extends SimpleJavaFileObject {
aoqi@0: 
aoqi@0:         String template = "class Test {\n" +
aoqi@0:                           "   SAM s = #E;\n" +
aoqi@0:                           "}";
aoqi@0: 
aoqi@0:         String source;
aoqi@0: 
aoqi@0:         public JavaSource() {
aoqi@0:             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
aoqi@0:             source = template.replaceAll("#E",
aoqi@0:                     ek.expressionString(pk1, pk2, mk1, mk2, lk, pn, sk));
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
aoqi@0:             return source;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void run() {
aoqi@0:         JavacTask ct = (JavacTask)comp.getTask(null, fm.get(), diagChecker,
aoqi@0:                 null, null, Arrays.asList(source));
aoqi@0:         try {
aoqi@0:             ct.parse();
aoqi@0:         } catch (Throwable ex) {
aoqi@0:             processException(ex);
aoqi@0:             return;
aoqi@0:         }
aoqi@0:         check();
aoqi@0:     }
aoqi@0: 
aoqi@0:     void check() {
aoqi@0:         checkCount.incrementAndGet();
aoqi@0: 
aoqi@0:         boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
aoqi@0:                 (lk.arity() > 1 && !mk2.compatibleWith(pk2));
aoqi@0: 
aoqi@0:         if (lk.arity() == 2 &&
aoqi@0:                 (pk1.explicit() != pk2.explicit() ||
aoqi@0:                 pk1.isVarargs())) {
aoqi@0:             errorExpected = true;
aoqi@0:         }
aoqi@0: 
aoqi@0:         errorExpected |= pn == LambdaParameterName.UNDERSCORE &&
aoqi@0:                 lk.arity() > 0;
aoqi@0: 
aoqi@0:         if (errorExpected != diagChecker.errorFound) {
aoqi@0:             throw new Error("invalid diagnostics for source:\n" +
aoqi@0:                 source.getCharContent(true) +
aoqi@0:                 "\nFound error: " + diagChecker.errorFound +
aoqi@0:                 "\nExpected error: " + errorExpected);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class DiagnosticChecker
aoqi@0:         implements javax.tools.DiagnosticListener<JavaFileObject> {
aoqi@0: 
aoqi@0:         boolean errorFound;
aoqi@0: 
aoqi@0:         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
aoqi@0:             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
aoqi@0:                 errorFound = true;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: }