jdk8-mips64-public/langtools: test/tools/javac/lambda/LambdaParserTest.java@9448fe783fd2 (annotated)

test/tools/javac/lambda/LambdaParserTest.java@9448fe783fd2 (annotated)

test/tools/javac/lambda/LambdaParserTest.java

Mon, 28 Nov 2011 15:56:42 +0000

author: mcimadamore
date: Mon, 28 Nov 2011 15:56:42 +0000
changeset 1144: 9448fe783fd2
child 1169: 116f68a5e677
permissions: -rw-r--r--

7115050: Add parser support for lambda expressions
Summary: Add support for parsing lambda expressions to JavacParser
Reviewed-by: jjg

 /*
  * 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;
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/LambdaParserTest.java@9448fe783fd2 (annotated)

test/tools/javac/lambda/LambdaParserTest.java