1 /*
 2  * Copyright (c) 2026, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 package jdk.incubator.code.dialect.java;
26 
27 import jdk.incubator.code.CodeContext;
28 
29 import java.util.ArrayDeque;
30 
31 final class ContextStackArg<T> {
32 
33     void push(CodeContext cc, T arg) {
34         @SuppressWarnings("unchecked")
35         var argStack = (ArrayDeque<T>) cc.computePropertyIfAbsent(this,
36                 _ -> new ArrayDeque<>(1));
37         argStack.push(arg);
38     }
39 
40     T poll(CodeContext cc) {
41         @SuppressWarnings("unchecked")
42         var argStack = (ArrayDeque<T>) cc.getProperty(this);
43         return argStack != null
44                 ? argStack.poll()
45                 : null;
46     }
47 }