83 lines
2.7 KiB
Java
83 lines
2.7 KiB
Java
/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8295020
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* @summary javac emits incorrect code for for-each on an intersection type.
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* @run main CovariantIntersectIterator
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*/
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import java.io.Serializable;
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import java.util.Iterator;
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public class CovariantIntersectIterator {
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public static void main(String... args) {
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int npeCount = 0;
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try {
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// JCEnhancedForLoop.expr's erased type is ALREADY an Iterable
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// iterator() comes from expr's erased type (MyIterable) and
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// is called using invokevirtual & returns a covariant type (MyIterable.MyIterator)
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for (Object s : (MyIterable & Serializable) null) {}
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} catch (NullPointerException e) {
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npeCount++;
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}
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try {
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// JCEnhancedForLoop.expr's erased type is NOT an Iterable
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// iterator() comes from Iterable (expr's erased type casted),
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// will be called by invokeinterface and return Iterator
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for (Object s : (MyIterableBase & Iterable<Object>) null) {}
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} catch (NullPointerException e) {
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npeCount++;
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}
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if (npeCount != 2) {
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throw new AssertionError("Expected NPE missing");
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}
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}
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abstract static class MyIterableBase {
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public abstract MyIterable.MyIterator iterator();
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}
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static class MyIterable extends MyIterableBase implements Iterable<Object> {
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class MyIterator implements Iterator<Object> {
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public boolean hasNext() {
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return false;
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}
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public Object next() {
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return null;
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}
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public void remove() {}
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}
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public MyIterator iterator() {
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return new MyIterator();
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}
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}
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}
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