jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/ir/ReturnNode.java@4be452026847 (annotated)

src/jdk/nashorn/internal/ir/ReturnNode.java@4be452026847 (annotated)

src/jdk/nashorn/internal/ir/ReturnNode.java

Sat, 23 Mar 2013 00:58:39 +0100

author: attila
date: Sat, 23 Mar 2013 00:58:39 +0100
changeset 144: 4be452026847
parent 96: e478708faa22
child 211: 3a209cbd1d8f
permissions: -rw-r--r--

8010652: Eliminate non-child references in Block/FunctionNode, and make few node types immutable
Reviewed-by: jlaskey, lagergren

 /*
  * Copyright (c) 2010, 2013, 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * 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.
  */
 package jdk.nashorn.internal.ir;
 import static jdk.nashorn.internal.parser.TokenType.RETURN;
 import static jdk.nashorn.internal.parser.TokenType.YIELD;
 import jdk.nashorn.internal.ir.annotations.Ignore;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
 import jdk.nashorn.internal.runtime.Source;
 /**
  * IR representation for RETURN or YIELD statements.
  *
  */
 public class ReturnNode extends Node {
     /** Optional expression. */
     private Node expression;
     /** Try chain. */
     @Ignore
     private final TryNode tryChain;
     /**
      * Constructor
      *
      * @param source     the source
      * @param token      token
      * @param finish     finish
      * @param expression expression to return
      * @param tryChain   surrounding try chain.
      */
     public ReturnNode(final Source source, final long token, final int finish, final Node expression, final TryNode tryChain) {
         super(source, token, finish);
         this.expression = expression;
         this.tryChain   = tryChain;
         setIsTerminal(true);
     }
     private ReturnNode(final ReturnNode returnNode, final CopyState cs) {
         super(returnNode);
         this.expression = cs.existingOrCopy(returnNode.expression);
         this.tryChain   = (TryNode)cs.existingOrSame(returnNode.tryChain);
     }
     @Override
     protected Node copy(final CopyState cs) {
         return new ReturnNode(this, cs);
     }
     /**
      * Return true if is a RETURN node.
      * @return true if is RETURN node.
      */
     public boolean isReturn() {
         return isTokenType(RETURN);
     }
     /**
      * Check if this return node has an expression
      * @return true if not a void return
      */
     public boolean hasExpression() {
         return expression != null;
     }
     /**
      * Return true if is a YIELD node.
      * @return TRUE if is YIELD node.
      */
     public boolean isYield() {
         return isTokenType(YIELD);
     }
     @Override
     public Node accept(final NodeVisitor visitor) {
         if (visitor.enterReturnNode(this) != null) {
             if (expression != null) {
                 expression = expression.accept(visitor);
             }
             return visitor.leaveReturnNode(this);
         }
         return this;
     }
     @Override
     public void toString(final StringBuilder sb) {
         sb.append(isYield() ? "yield" : "return ");
         if (expression != null) {
             expression.toString(sb);
         }
     }
     @Override
     public boolean equals(final Object other) {
         if (other instanceof ReturnNode) {
             final ReturnNode otherReturn = (ReturnNode)other;
             if (hasExpression() != otherReturn.hasExpression()) {
                 return false;
             } else if (hasExpression()) {
                 return otherReturn.getExpression().equals(getExpression());
             }
             return true;
         }
         return false;
     }
     @Override
     public int hashCode() {
         return 0x4711_17 ^ (expression == null ? 0 : expression.hashCode());
     }
     /**
      * Get the expression this node returns
      * @return return expression, or null if void return
      */
     public Node getExpression() {
         return expression;
     }
     /**
      * Reset the expression this node returns
      * @param expression new expression, or null if void return
      */
     public void setExpression(final Node expression) {
         this.expression = expression;
     }
     /**
      * Get the surrounding try chain for this return node
      * @return try chain
      */
     public TryNode getTryChain() {
         return tryChain;
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/ir/ReturnNode.java@4be452026847 (annotated)

src/jdk/nashorn/internal/ir/ReturnNode.java