SetSplitState.java revision 1070:34d55faf0b3a 
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
26package jdk.nashorn.internal.ir;
27
28import jdk.nashorn.internal.codegen.CompilerConstants;
29import jdk.nashorn.internal.ir.visitor.NodeVisitor;
30import 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 */
37public 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}
71