1 /*

     2  * Copyright (c) 2019, Google LLC. 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  */

    23 

    24 /*

    25  * @test

    26  * @bug 8222035

    27  * @summary minimal inference context optimization is forcing resolution with incomplete constraints

    28  * @compile/fail/ref=MinContextOpTest.out -XDrawDiagnostics MinContextOpTest.java

    29  */

    30 

    31 import java.util.Map;

    32 import java.util.function.Function;

    33 import java.util.stream.Collector;

    34 import java.util.stream.Stream;

    35 

    36 public class MinContextOpTest {

    37     abstract class A {

    38         abstract static class T<K> {

    39             abstract String f();

    40         }

    41 

    42         abstract <E> Function<E, E> id();

    43 

    44         abstract static class ImmutableMap<K, V> implements Map<K, V> {}

    45 

    46         abstract <T, K, V> Collector<T, ?, ImmutableMap<K, V>> toImmutableMap(

    47                 Function<? super T, ? extends K> k, Function<? super T, ? extends V> v);

    48 

    49         ImmutableMap<String, T<?>> test(Stream<T> stream) {

    50             return stream.collect(toImmutableMap(T::f, id()));

    51         }

    52     }

    53 }