Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: src/jdk/nashorn/internal/ir/SplitReturn.java
src/jdk/nashorn/internal/ir/SplitReturn.java
- changeset 1064
- 03c06c337d9d
- child 1397
- 19263eb2ff0c
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| 1063:8c51767d534d | 1064:03c06c337d9d |
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| 1 /* | |
| 2 * Copyright (c) 2014, 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 | |
| 26 package jdk.nashorn.internal.ir; | |
| 27 | |
| 28 import jdk.nashorn.internal.ir.visitor.NodeVisitor; | |
| 29 | |
| 30 /** | |
| 31 * Synthetic AST node that represents return from a split fragment of a split function for control flow reasons (break | |
| 32 * or continue into a target outside the current fragment). It has no JavaScript source representation and only occurs | |
| 33 * in synthetic functions created by the split-into-functions transformation. It is different from a return node in | |
| 34 * that the return value is irrelevant, and doesn't affect the function's return type calculation. | |
| 35 */ | |
| 36 public final class SplitReturn extends Statement { | |
| 37 private static final long serialVersionUID = 1L; | |
| 38 | |
| 39 /** The sole instance of this AST node. */ | |
| 40 public static final SplitReturn INSTANCE = new SplitReturn(); | |
| 41 | |
| 42 private SplitReturn() { | |
| 43 super(NO_LINE_NUMBER, NO_TOKEN, NO_FINISH); | |
| 44 } | |
| 45 | |
| 46 @Override | |
| 47 public boolean isTerminal() { | |
| 48 return true; | |
| 49 } | |
| 50 | |
| 51 @Override | |
| 52 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { | |
| 53 return visitor.enterSplitReturn(this) ? visitor.leaveSplitReturn(this) : this; | |
| 54 } | |
| 55 | |
| 56 @Override | |
| 57 public void toString(StringBuilder sb, boolean printType) { | |
| 58 sb.append(":splitreturn;"); | |
| 59 } | |
| 60 | |
| 61 private Object readResolve() { | |
| 62 return INSTANCE; | |
| 63 } | |
| 64 } |
