7ab12856c4
8268748: Javac generates uncorrect bytecodes when using nested pattern variables Reviewed-by: jlahoda, vromero
73 lines
2.6 KiB
Java
73 lines
2.6 KiB
Java
/*
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* Copyright (c) 2021, 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 8267610
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* @summary LambdaToMethod cannot capture pattern variables. So the TransPatterns should
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* transform the pattern variables and symbols to normal variables and symbols.
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* @compile --enable-preview -source ${jdk.version} LambdaCannotCapturePatternVariables.java
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* @run main/othervm --enable-preview LambdaCannotCapturePatternVariables
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*/
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import java.util.function.Supplier;
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public class LambdaCannotCapturePatternVariables {
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public static void main(String[] args) {
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var testVar = new LambdaCannotCapturePatternVariables();
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testVar.testInstanceOfPatternVariable(Integer.valueOf(1));
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testVar.testSwitchPatternVariable(Integer.valueOf(1));
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testVar.test(Integer.valueOf(1));
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}
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public Integer testInstanceOfPatternVariable(Object x) {
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if(x instanceof Number y) {
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return ((Supplier<Integer>) (() -> {
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return ((y instanceof Integer z) ? z : 1);
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})).get();
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}
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return null;
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}
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public Integer testSwitchPatternVariable(Object x) {
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switch (x) {
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case Number n: {
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return ((Supplier<Integer>) (() -> {
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return ((n instanceof Integer i) ? i : 1);
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})).get();
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}
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default: return null;
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}
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}
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// Provided by the user
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public Integer test(Object x) {
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Integer bar = 1;
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return ((x instanceof Number y) ?
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((Supplier<Integer>) (() -> {
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return ((y instanceof Integer z) ? z : bar);
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})).get() : bar);
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}
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}
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