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.codegen.types.Type; 30 import jdk.nashorn.internal.ir.annotations.Ignore; 31 import jdk.nashorn.internal.ir.visitor.NodeVisitor; 32 import jdk.nashorn.internal.runtime.Scope; 33 34 /** 35 * Synthetic AST node that represents loading of the scope object and invocation of the {@link Scope#getSplitState()} 36 * method on it. It has no JavaScript source representation and only occurs in synthetic functions created by 37 * the split-into-functions transformation. 38 */ 39 public final class GetSplitState extends Expression { 40 private static final long serialVersionUID = 1L; 41 42 /** The sole instance of this AST node. */ 43 @Ignore 44 public final static GetSplitState INSTANCE = new GetSplitState(); 45 46 private GetSplitState() { 47 super(NO_TOKEN, NO_FINISH); 48 } 49 50 @Override 51 public Type getType() { 52 return Type.INT; 53 } 54 55 @Override 56 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { 57 return visitor.enterGetSplitState(this) ? visitor.leaveGetSplitState(this) : this; 58 } 59 60 @Override 61 public void toString(final StringBuilder sb, final boolean printType) { 62 if (printType) { 63 sb.append("{I}"); 64 } 65 sb.append(CompilerConstants.SCOPE.symbolName()).append('.').append(Scope.GET_SPLIT_STATE.name()).append("()"); 66 } 67 68 private Object readResolve() { 69 return INSTANCE; 70 } 71 }