73 lines
2.6 KiB
Java
73 lines
2.6 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||
|
|
* or visit www.oracle.com if you need additional information or have any
|
||
|
|
* questions.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* @test
|
||
|
|
* @bug 8267610
|
||
|
|
* @summary LambdaToMethod cannot capture pattern variables. So the TransPatterns should
|
||
|
|
* transform the pattern variables and symbols to normal variables and symbols.
|
||
|
|
* @compile --enable-preview -source ${jdk.version} LambdaCannotCapturePatternVariables.java
|
||
|
|
* @run main/othervm --enable-preview LambdaCannotCapturePatternVariables
|
||
|
|
*/
|
||
|
|
|
||
|
|
import java.util.function.Supplier;
|
||
|
|
|
||
|
|
public class LambdaCannotCapturePatternVariables {
|
||
|
|
|
||
|
|
public static void main(String[] args) {
|
||
|
|
var testVar = new LambdaCannotCapturePatternVariables();
|
||
|
|
testVar.testInstanceOfPatternVariable(Integer.valueOf(1));
|
||
|
|
testVar.testSwitchPatternVariable(Integer.valueOf(1));
|
||
|
|
testVar.test(Integer.valueOf(1));
|
||
|
|
}
|
||
|
|
|
||
|
|
public Integer testInstanceOfPatternVariable(Object x) {
|
||
|
|
if(x instanceof Number y) {
|
||
|
|
return ((Supplier<Integer>) (() -> {
|
||
|
|
return ((y instanceof Integer z) ? z : 1);
|
||
|
|
})).get();
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
public Integer testSwitchPatternVariable(Object x) {
|
||
|
|
switch (x) {
|
||
|
|
case Number n: {
|
||
|
|
return ((Supplier<Integer>) (() -> {
|
||
|
|
return ((n instanceof Integer i) ? i : 1);
|
||
|
|
})).get();
|
||
|
|
}
|
||
|
|
default: return null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Provided by the user
|
||
|
|
public Integer test(Object x) {
|
||
|
|
Integer bar = 1;
|
||
|
|
return ((x instanceof Number y) ?
|
||
|
|
((Supplier<Integer>) (() -> {
|
||
|
|
return ((y instanceof Integer z) ? z : bar);
|
||
|
|
})).get() : bar);
|
||
|
|
}
|
||
|
|
}
|