langtools/test/tools/javac/lambda/TargetType76.java

/*
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 * 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.
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 */

/*
 * @test
 * @bug 8016175
 * @summary Add bottom-up type-checking support for unambiguous method references
 * @compile TargetType76.java
 */
class TargetType76 {

    interface Function<X, Y> {
        Y m(X x);
    }

    interface OfRef<T> { }

    interface Supplier<X> {
        X make();
    }

    interface Stream<X> { }

    interface Node<E> {
        Spliterator<E> spliterator();
    }

    interface Spliterator<X> {
        Spliterator<X> spliterator();
    }

    class RefTestData<T, I> implements OfRef<T> {
        RefTestData(I state,
                    Function<I, Stream<T>> streamFn,
                    Function<I, Spliterator<T>> splitrFn) { }
    }

    <O> OfRef<O> ofCollection(Node<O> collection) {
        return new RefTestData<>(collection,
                                 x->stream(x::spliterator),
                                 Node::spliterator);
    }

    <S> Stream<S> stream(Supplier<? extends Spliterator<S>> supplier) { return null; }
}