jdk8-mips64-public/langtools: test/tools/javac/lambda/MostSpecific08.java@4a6acc42c3a1

8016177: structural most specific and stuckness
Reviewed-by: jjg, vromero
Contributed-by: maurizio.cimadamore@oracle.com

     1 /*

     2  * Copyright (c) 2013, 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 8008813

    27  * @summary Structural most specific fails when method reference is passed to overloaded method

    28  * @compile/fail/ref=MostSpecific08.out -XDrawDiagnostics MostSpecific08.java

    29  */

    30 class MostSpecific08 {

    32     static class C {

    33         int getInt() { return -1; }

    34         Integer getInteger() { return -1; }

    35     }

    37     interface IntResult { }

    38     interface ReferenceResult<X> { }

    40     interface PrimitiveFunction {

    41         int f(C c);

    42     }

    44     interface ReferenceFunction<X> {

    45         X f(C c);

    46     }

    48     interface Tester {

    49         IntResult apply(PrimitiveFunction p);

    50         <Z> ReferenceResult<Z> apply(ReferenceFunction<Z> p);

    51     }

    53     void testMref(Tester t) {

    54         IntResult pr = t.apply(C::getInt); //ok - unoverloaded mref

    55         ReferenceResult<Integer> rr = t.apply(C::getInteger); //ok - unoverloaded mref

    56     }

    58     void testLambda(Tester t) {

    59         IntResult pr1 = t.apply(c->c.getInt()); //ambiguous - implicit

    60         IntResult pr2 = t.apply((C c)->c.getInt()); //ok

    61         ReferenceResult<Integer> rr1 = t.apply(c->c.getInteger()); //ambiguous - implicit

    62         ReferenceResult<Integer> rr2 = t.apply((C c)->c.getInteger()); //ok

    63     }

    64 }

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