Hi Please review this compatible fix to Stream.generate to accept a covariant Supplier.
Paul. diff -r 3e3ca9800322 src/java.base/share/classes/java/util/stream/Stream.java --- a/src/java.base/share/classes/java/util/stream/Stream.java Tue Nov 08 15:37:20 2016 -0800 +++ b/src/java.base/share/classes/java/util/stream/Stream.java Tue Nov 08 16:36:51 2016 -0800 @@ -1327,7 +1327,7 @@ * @param s the {@code Supplier} of generated elements * @return a new infinite sequential unordered {@code Stream} */ - public static<T> Stream<T> generate(Supplier<T> s) { + public static<T> Stream<T> generate(Supplier<? extends T> s) { Objects.requireNonNull(s); return StreamSupport.stream( new StreamSpliterators.InfiniteSupplyingSpliterator.OfRef<>(Long.MAX_VALUE, s), false); diff -r 3e3ca9800322 src/java.base/share/classes/java/util/stream/StreamSpliterators.java --- a/src/java.base/share/classes/java/util/stream/StreamSpliterators.java Tue Nov 08 15:37:20 2016 -0800 +++ b/src/java.base/share/classes/java/util/stream/StreamSpliterators.java Tue Nov 08 16:36:51 2016 -0800 @@ -1346,9 +1346,9 @@ } static final class OfRef<T> extends InfiniteSupplyingSpliterator<T> { - final Supplier<T> s; + final Supplier<? extends T> s; - OfRef(long size, Supplier<T> s) { + OfRef(long size, Supplier<? extends T> s) { super(size); this.s = s; }