jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/ir/JoinPredecessorExpression.java@8c51767d534d (annotated)

src/jdk/nashorn/internal/ir/JoinPredecessorExpression.java@8c51767d534d (annotated)

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

Fri, 17 Oct 2014 14:24:26 +0200

author: attila
date: Fri, 17 Oct 2014 14:24:26 +0200
changeset 1063: 8c51767d534d
parent 963: e2497b11a021
child 1209: acb0b8f6540e
permissions: -rw-r--r--

8059843: Make AST serializable
Reviewed-by: hannesw, 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 java.util.function.Function;
 import jdk.nashorn.internal.codegen.types.Type;
 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
 /**
  * A wrapper for an expression that is in a position to be a join predecessor.
  */
 public class JoinPredecessorExpression extends Expression implements JoinPredecessor {
     private static final long serialVersionUID = 1L;
     private final Expression expression;
     private final LocalVariableConversion conversion;
     /**
      * A no-arg constructor does not wrap any expression on its own, but can be used as a place to contain a local
      * variable conversion in a place where an expression can otherwise stand.
      */
     public JoinPredecessorExpression() {
         this(null);
     }
     /**
      * A constructor for wrapping an expression and making it a join predecessor. Typically used on true and false
      * subexpressions of the ternary node as well as on the operands of short-circuiting logical expressions {@code &&}
      * and {@code ||}.
      * @param expression the expression to wrap
      */
     public JoinPredecessorExpression(final Expression expression) {
         this(expression, null);
     }
     private JoinPredecessorExpression(final Expression expression, final LocalVariableConversion conversion) {
         super(expression == null ? 0L : expression.getToken(), expression == null ? 0 : expression.getStart(), expression == null ? 0 : expression.getFinish());
         this.expression = expression;
         this.conversion = conversion;
     }
     @Override
     public JoinPredecessor setLocalVariableConversion(final LexicalContext lc, final LocalVariableConversion conversion) {
         if(conversion == this.conversion) {
             return this;
         }
         return new JoinPredecessorExpression(expression, conversion);
     }
     @Override
     public Type getType(final Function<Symbol, Type> localVariableTypes) {
         return expression.getType(localVariableTypes);
     }
     @Override
     public boolean isAlwaysFalse() {
         return expression != null && expression.isAlwaysFalse();
     }
     @Override
     public boolean isAlwaysTrue() {
         return expression != null && expression.isAlwaysTrue();
     }
     /**
      * Returns the underlying expression.
      * @return the underlying expression.
      */
     public Expression getExpression() {
         return expression;
     }
     /**
      * Sets the underlying expression.
      * @param expression the new underlying expression
      * @return this or modified join predecessor expression object.
      */
     public JoinPredecessorExpression setExpression(final Expression expression) {
         if(expression == this.expression) {
             return this;
         }
         return new JoinPredecessorExpression(expression, conversion);
     }
     @Override
     public LocalVariableConversion getLocalVariableConversion() {
         return conversion;
     }
     @Override
     public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
         if(visitor.enterJoinPredecessorExpression(this)) {
             final Expression expr = getExpression();
             return visitor.leaveJoinPredecessorExpression(expr == null ? this : setExpression((Expression)expr.accept(visitor)));
         }
         return this;
     }
     @Override
     public void toString(final StringBuilder sb, final boolean printType) {
         if(expression != null) {
             expression.toString(sb, printType);
         }
         if(conversion != null) {
             conversion.toString(sb);
         }
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/ir/JoinPredecessorExpression.java@8c51767d534d (annotated)

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