mcimadamore@1144: /*
mcimadamore@1144:  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
mcimadamore@1144:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
mcimadamore@1144:  *
mcimadamore@1144:  * This code is free software; you can redistribute it and/or modify it
mcimadamore@1144:  * under the terms of the GNU General Public License version 2 only, as
mcimadamore@1144:  * published by the Free Software Foundation.
mcimadamore@1144:  *
mcimadamore@1144:  * This code is distributed in the hope that it will be useful, but WITHOUT
mcimadamore@1144:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
mcimadamore@1144:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
mcimadamore@1144:  * version 2 for more details (a copy is included in the LICENSE file that
mcimadamore@1144:  * accompanied this code).
mcimadamore@1144:  *
mcimadamore@1144:  * You should have received a copy of the GNU General Public License version
mcimadamore@1144:  * 2 along with this work; if not, write to the Free Software Foundation,
mcimadamore@1144:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
mcimadamore@1144:  *
mcimadamore@1144:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
mcimadamore@1144:  * or visit www.oracle.com if you need additional information or have any
mcimadamore@1144:  * questions.
mcimadamore@1144:  */
mcimadamore@1144: 
mcimadamore@1144: /*
mcimadamore@1144:  * @test
mcimadamore@1144:  * @bug 7115050
mcimadamore@1144:  * @summary Add parser support for lambda expressions
mcimadamore@1144:  */
mcimadamore@1144: 
mcimadamore@1144: import com.sun.source.util.JavacTask;
mcimadamore@1144: import java.net.URI;
mcimadamore@1144: import java.util.Arrays;
mcimadamore@1144: import javax.tools.Diagnostic;
mcimadamore@1144: import javax.tools.JavaCompiler;
mcimadamore@1144: import javax.tools.JavaFileObject;
mcimadamore@1144: import javax.tools.SimpleJavaFileObject;
mcimadamore@1144: import javax.tools.StandardJavaFileManager;
mcimadamore@1144: import javax.tools.ToolProvider;
mcimadamore@1144: 
mcimadamore@1144: public class LambdaParserTest {
mcimadamore@1144: 
mcimadamore@1144:     static int checkCount = 0;
mcimadamore@1144: 
mcimadamore@1144:     enum LambdaKind {
mcimadamore@1144:         NILARY_EXPR("()->x"),
mcimadamore@1144:         NILARY_STMT("()->{ return x; }"),
mcimadamore@1144:         ONEARY_SHORT_EXPR("x->x"),
mcimadamore@1144:         ONEARY_SHORT_STMT("x->{ return x; }"),
mcimadamore@1144:         ONEARY_EXPR("(#M1 #T1 x)->x"),
mcimadamore@1144:         ONEARY_STMT("(#M1 #T1 x)->{ return x; }"),
mcimadamore@1144:         TWOARY_EXPR("(#M1 #T1 x, #M2 #T2 y)->x"),
mcimadamore@1144:         TWOARY_STMT("(#M1 #T1 x, #M2 #T2 y)->{ return x; }");
mcimadamore@1144: 
mcimadamore@1144:         String lambdaTemplate;
mcimadamore@1144: 
mcimadamore@1144:         LambdaKind(String lambdaTemplate) {
mcimadamore@1144:             this.lambdaTemplate = lambdaTemplate;
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
mcimadamore@1144:                 ModifierKind mk1, ModifierKind mk2) {
mcimadamore@1144:             return lambdaTemplate.replaceAll("#M1", mk1.modifier)
mcimadamore@1144:                     .replaceAll("#M2", mk2.modifier)
mcimadamore@1144:                     .replaceAll("#T1", pk1.parameterType)
mcimadamore@1144:                     .replaceAll("#T2", pk2.parameterType);
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         int arity() {
mcimadamore@1144:             switch (this) {
mcimadamore@1144:                 case NILARY_EXPR:
mcimadamore@1144:                 case NILARY_STMT: return 0;
mcimadamore@1144:                 case ONEARY_SHORT_EXPR:
mcimadamore@1144:                 case ONEARY_SHORT_STMT:
mcimadamore@1144:                 case ONEARY_EXPR:
mcimadamore@1144:                 case ONEARY_STMT: return 1;
mcimadamore@1144:                 case TWOARY_EXPR:
mcimadamore@1144:                 case TWOARY_STMT: return 2;
mcimadamore@1144:                 default: throw new AssertionError("Invalid lambda kind " + this);
mcimadamore@1144:             }
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         boolean isShort() {
mcimadamore@1144:             return this == ONEARY_SHORT_EXPR ||
mcimadamore@1144:                     this == ONEARY_SHORT_STMT;
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     enum LambdaParameterKind {
mcimadamore@1144:         IMPLICIT(""),
mcimadamore@1144:         EXPLIICT_SIMPLE("A"),
mcimadamore@1144:         EXPLICIT_VARARGS("A..."),
mcimadamore@1144:         EXPLICIT_GENERIC1("A<X>"),
mcimadamore@1144:         EXPLICIT_GENERIC3("A<? extends X, ? super Y>");
mcimadamore@1144: 
mcimadamore@1144:         String parameterType;
mcimadamore@1144: 
mcimadamore@1144:         LambdaParameterKind(String parameterType) {
mcimadamore@1144:             this.parameterType = parameterType;
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         boolean explicit() {
mcimadamore@1144:             return this != IMPLICIT;
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     enum ModifierKind {
mcimadamore@1144:         NONE(""),
mcimadamore@1144:         FINAL("final"),
mcimadamore@1144:         PUBLIC("public");
mcimadamore@1144: 
mcimadamore@1144:         String modifier;
mcimadamore@1144: 
mcimadamore@1144:         ModifierKind(String modifier) {
mcimadamore@1144:             this.modifier = modifier;
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         boolean compatibleWith(LambdaParameterKind pk) {
mcimadamore@1144:             switch (this) {
mcimadamore@1144:                 case PUBLIC: return false;
mcimadamore@1144:                 case FINAL: return pk != LambdaParameterKind.IMPLICIT;
mcimadamore@1144:                 case NONE: return true;
mcimadamore@1144:                 default: throw new AssertionError("Invalid modifier kind " + this);
mcimadamore@1144:             }
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     enum ExprKind {
mcimadamore@1144:         NONE("#L#S"),
mcimadamore@1144:         SINGLE_PAREN1("(#L#S)"),
mcimadamore@1144:         SINGLE_PAREN2("(#L)#S"),
mcimadamore@1144:         DOUBLE_PAREN1("((#L#S))"),
mcimadamore@1144:         DOUBLE_PAREN2("((#L)#S)"),
mcimadamore@1144:         DOUBLE_PAREN3("((#L))#S");
mcimadamore@1144: 
mcimadamore@1144:         String expressionTemplate;
mcimadamore@1144: 
mcimadamore@1144:         ExprKind(String expressionTemplate) {
mcimadamore@1144:             this.expressionTemplate = expressionTemplate;
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
mcimadamore@1144:                 ModifierKind mk1, ModifierKind mk2, LambdaKind lk, SubExprKind sk) {
mcimadamore@1144:             return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2))
mcimadamore@1144:                     .replaceAll("#S", sk.subExpression);
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     enum SubExprKind {
mcimadamore@1144:         NONE(""),
mcimadamore@1144:         SELECT_FIELD(".f"),
mcimadamore@1144:         SELECT_METHOD(".f()"),
mcimadamore@1144:         SELECT_NEW(".new Foo()"),
mcimadamore@1144:         POSTINC("++"),
mcimadamore@1144:         POSTDEC("--");
mcimadamore@1144: 
mcimadamore@1144:         String subExpression;
mcimadamore@1144: 
mcimadamore@1144:         SubExprKind(String subExpression) {
mcimadamore@1144:             this.subExpression = subExpression;
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     public static void main(String... args) throws Exception {
mcimadamore@1144: 
mcimadamore@1144:         //create default shared JavaCompiler - reused across multiple compilations
mcimadamore@1144:         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
mcimadamore@1144:         StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
mcimadamore@1144: 
mcimadamore@1144:         for (LambdaKind lk : LambdaKind.values()) {
mcimadamore@1144:             for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
mcimadamore@1144:                 if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT) continue;
mcimadamore@1144:                 for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
mcimadamore@1144:                     if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT) continue;
mcimadamore@1144:                     for (ModifierKind mk1 : ModifierKind.values()) {
mcimadamore@1144:                         if (mk1 != ModifierKind.NONE && lk.isShort()) continue;
mcimadamore@1144:                         if (lk.arity() < 1 && mk1 != ModifierKind.NONE) continue;
mcimadamore@1144:                         for (ModifierKind mk2 : ModifierKind.values()) {
mcimadamore@1144:                             if (lk.arity() < 2 && mk2 != ModifierKind.NONE) continue;
mcimadamore@1144:                             for (SubExprKind sk : SubExprKind.values()) {
mcimadamore@1144:                                 for (ExprKind ek : ExprKind.values()) {
mcimadamore@1144:                                     new LambdaParserTest(pk1, pk2, mk1, mk2, lk, sk, ek)
mcimadamore@1144:                                             .run(comp, fm);
mcimadamore@1144:                                 }
mcimadamore@1144:                             }
mcimadamore@1144:                         }
mcimadamore@1144:                     }
mcimadamore@1144:                 }
mcimadamore@1144:             }
mcimadamore@1144:         }
mcimadamore@1144:         System.out.println("Total check executed: " + checkCount);
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     LambdaParameterKind pk1;
mcimadamore@1144:     LambdaParameterKind pk2;
mcimadamore@1144:     ModifierKind mk1;
mcimadamore@1144:     ModifierKind mk2;
mcimadamore@1144:     LambdaKind lk;
mcimadamore@1144:     SubExprKind sk;
mcimadamore@1144:     ExprKind ek;
mcimadamore@1144:     JavaSource source;
mcimadamore@1144:     DiagnosticChecker diagChecker;
mcimadamore@1144: 
mcimadamore@1144:     LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2, ModifierKind mk1,
mcimadamore@1144:             ModifierKind mk2, LambdaKind lk, SubExprKind sk, ExprKind ek) {
mcimadamore@1144:         this.pk1 = pk1;
mcimadamore@1144:         this.pk2 = pk2;
mcimadamore@1144:         this.mk1 = mk1;
mcimadamore@1144:         this.mk2 = mk2;
mcimadamore@1144:         this.lk = lk;
mcimadamore@1144:         this.sk = sk;
mcimadamore@1144:         this.ek = ek;
mcimadamore@1144:         this.source = new JavaSource();
mcimadamore@1144:         this.diagChecker = new DiagnosticChecker();
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     class JavaSource extends SimpleJavaFileObject {
mcimadamore@1144: 
mcimadamore@1144:         String template = "class Test {\n" +
mcimadamore@1144:                           "   SAM s = #E;\n" +
mcimadamore@1144:                           "}";
mcimadamore@1144: 
mcimadamore@1144:         String source;
mcimadamore@1144: 
mcimadamore@1144:         public JavaSource() {
mcimadamore@1144:             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
mcimadamore@1144:             source = template.replaceAll("#E", ek.expressionString(pk1, pk2, mk1, mk2, lk, sk));
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         @Override
mcimadamore@1144:         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
mcimadamore@1144:             return source;
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
mcimadamore@1144:         JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
mcimadamore@1144:                 Arrays.asList("-XDallowLambda"), null, Arrays.asList(source));
mcimadamore@1144:         try {
mcimadamore@1144:             ct.parse();
mcimadamore@1144:         } catch (Throwable ex) {
jjg@1169:             throw new AssertionError("Error thrown when parsing the following source:\n" + source.getCharContent(true));
mcimadamore@1144:         }
mcimadamore@1144:         check();
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     void check() {
mcimadamore@1144:         checkCount++;
mcimadamore@1144: 
mcimadamore@1144:         boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
mcimadamore@1144:                 (lk.arity() > 1 && !mk2.compatibleWith(pk2));
mcimadamore@1144: 
mcimadamore@1144:         if (lk.arity() == 2 &&
mcimadamore@1144:                 (pk1.explicit() != pk2.explicit() ||
mcimadamore@1144:                 pk1 == LambdaParameterKind.EXPLICIT_VARARGS)) {
mcimadamore@1144:             errorExpected = true;
mcimadamore@1144:         }
mcimadamore@1144: 
mcimadamore@1144:         if (errorExpected != diagChecker.errorFound) {
mcimadamore@1144:             throw new Error("invalid diagnostics for source:\n" +
mcimadamore@1144:                 source.getCharContent(true) +
mcimadamore@1144:                 "\nFound error: " + diagChecker.errorFound +
mcimadamore@1144:                 "\nExpected error: " + errorExpected);
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: 
mcimadamore@1144:     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
mcimadamore@1144: 
mcimadamore@1144:         boolean errorFound;
mcimadamore@1144: 
mcimadamore@1144:         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
mcimadamore@1144:             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
mcimadamore@1144:                 errorFound = true;
mcimadamore@1144:             }
mcimadamore@1144:         }
mcimadamore@1144:     }
mcimadamore@1144: }