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.codegen.CompilerConstants;
  29 import jdk.nashorn.internal.ir.visitor.NodeVisitor;
  30 import jdk.nashorn.internal.runtime.Scope;
  31 
  32 /**
  33  * Synthetic AST node that represents loading of the scope object and invocation of the {@link Scope#setSplitState(int)}
  34  * method on it. It has no JavaScript source representation and only occurs in synthetic functions created by
  35  * the split-into-functions transformation.
  36  */
  37 public final class SetSplitState extends Statement {
  38     private static final long serialVersionUID = 1L;
  39 
  40     private final int state;
  41 
  42     /**
  43      * Creates a new split state setter
  44      * @param state the state to set
  45      * @param lineNumber the line number where it is inserted
  46      */
  47     public SetSplitState(final int state, final int lineNumber) {
  48         super(lineNumber, NO_TOKEN, NO_FINISH);
  49         this.state = state;
  50     }
  51 
  52     /**
  53      * Returns the state this setter sets.
  54      * @return the state this setter sets.
  55      */
  56     public int getState() {
  57         return state;
  58     }
  59 
  60     @Override
  61     public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {
  62         return visitor.enterSetSplitState(this) ? visitor.leaveSetSplitState(this) : this;
  63     }
  64 
  65     @Override
  66     public void toString(final StringBuilder sb, final boolean printType) {
  67         sb.append(CompilerConstants.SCOPE.symbolName()).append('.').append(Scope.SET_SPLIT_STATE.name())
  68         .append('(').append(state).append(");");
  69     }
  70 }