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// Test case for Issue 979:
// https://github.com/typetools/checker-framework/issues/979
class MyStream<T> {
@SuppressWarnings("nullness")
<R, A> R collect(MyCollector<? super T, A, R> collector) {
return null;
}
}
interface MyCollector<T, A, R> {}
class Inference {
@SuppressWarnings("nullness")
static <E> MyCollector<E, ?, MyStream<E>> toImmutableStream() {
return null;
}
MyStream<String> test(MyStream<String> p) {
/* Need Java 8 assignment context to correctly infer type arguments.
return p.collect(toImmutableStream());
^
found : @Initialized @NonNull MyStream<? extends @Initialized @Nullable Object>
required: @Initialized @NonNull MyStream<@Initialized @NonNull String>
*/
return p.collect(toImmutableStream());
}
}
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