jdk8-mips64-public/langtools: test/tools/javac/lambda/LambdaConv01.java@c6728c9addff

8010303: Graph inference: missing incorporation step causes spurious inference error
Summary: Multiple equality constraints on inference vars are not used to generate new inference constraints
Reviewed-by: jjg

     1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 8003280

    27  * @summary Add lambda tests

    28  *  basic test for lambda conversion

    29  * @author  Brian Goetz

    30  * @author  Maurizio Cimadamore

    31  * @run main LambdaConv01

    32  */

    34 public class LambdaConv01 {

    36     static int assertionCount = 0;

    38     static void assertTrue(boolean cond) {

    39         assertionCount++;

    40         if (!cond)

    41             throw new AssertionError();

    42     }

    44     interface IntToInt {

    45       public int foo(int x);

    46     }

    48     interface IntToVoid {

    49       public void foo(int x);

    50     }

    52     interface VoidToInt {

    53       public int foo();

    54     }

    56     interface TU<T, U> {

    57       public T foo(U u);

    58     }

    60     public static <T, U> T exec(TU<T, U> lambda, U x) {

    61         return lambda.foo(x);

    62     }

    64     static {

    65         //Assignment conversion:

    66         VoidToInt f1 = ()-> 3;

    67         assertTrue(3 == f1.foo());

    68         //Covariant returns:

    69         TU<Number, Integer> f2 = (Integer x) -> x;

    70         assertTrue(3 == f2.foo(3));

    71         //Method resolution with boxing:

    72         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);

    73         assertTrue(3 == res);

    74         //Runtime exception transparency:

    75         try {

    76             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);

    77         }

    78         catch (RuntimeException e) {

    79             assertTrue(true);

    80         }

    81     }

    83     {

    84         //Assignment conversion:

    85         VoidToInt f1 = ()-> 3;

    86         assertTrue(3 == f1.foo());

    87         //Covariant returns:

    88         TU<Number, Integer> f2 = (Integer x) -> x;

    89         assertTrue(3 == f2.foo(3));

    90         //Method resolution with boxing:

    91         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);

    92         assertTrue(3 == res);

    93         //Runtime exception transparency:

    94         try {

    95             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);

    96         }

    97         catch (RuntimeException e) {

    98             assertTrue(true);

    99         }

   100     }

   102     public static void test1() {

   103         //Assignment conversion:

   104         VoidToInt f1 = ()-> 3;

   105         assertTrue(3 == f1.foo());

   106         //Covariant returns:

   107         TU<Number, Integer> f2 = (Integer x) -> x;

   108         assertTrue(3 == f2.foo(3));

   109         //Method resolution with boxing:

   110         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);

   111         assertTrue(3 == res);

   112         //Runtime exception transparency:

   113         try {

   114             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);

   115         }

   116         catch (RuntimeException e) {

   117             assertTrue(true);

   118         }

   119     }

   121     public void test2() {

   122         //Assignment conversion:

   123         VoidToInt f1 = ()-> 3;

   124         assertTrue(3 == f1.foo());

   125         //Covariant returns:

   126         TU<Number, Integer> f2 = (Integer x) -> x;

   127         assertTrue(3 == f2.foo(3));

   128         //Method resolution with boxing:

   129         int res = LambdaConv01.<Integer,Integer>exec((Integer x) -> x, 3);

   130         assertTrue(3 == res);

   131         //Runtime exception transparency:

   132         try {

   133             LambdaConv01.<Integer,Object>exec((Object x) -> x.hashCode(), null);

   134         }

   135         catch (RuntimeException e) {

   136             assertTrue(true);

   137         }

   138     }

   140     public static void main(String[] args) {

   141         test1();

   142         new LambdaConv01().test2();

   143         assertTrue(assertionCount == 16);

   144     }

   145 }

Mercurial > jdk8-mips64-public > langtools / file revision

test/tools/javac/lambda/LambdaConv01.java@c6728c9addff

test/tools/javac/lambda/LambdaConv01.java