| /* |
| * 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 jdk.nashorn.internal.ir.annotations.Immutable; |
| import jdk.nashorn.internal.ir.visitor.NodeVisitor; |
| |
| /** |
| * IR representation for executing bare expressions. Basically, an expression |
| * node means "this code will be executed" and evaluating it results in |
| * statements being added to the IR |
| */ |
| @Immutable |
| public final class ExpressionStatement extends Statement { |
| private static final long serialVersionUID = 1L; |
| |
| /** Expression to execute. */ |
| private final Expression expression; |
| |
| /** |
| * Constructor |
| * |
| * @param lineNumber line number |
| * @param token token |
| * @param finish finish |
| * @param expression the expression to execute |
| */ |
| public ExpressionStatement(final int lineNumber, final long token, final int finish, final Expression expression) { |
| super(lineNumber, token, finish); |
| this.expression = expression; |
| } |
| |
| private ExpressionStatement(final ExpressionStatement expressionStatement, final Expression expression) { |
| super(expressionStatement); |
| this.expression = expression; |
| } |
| |
| @Override |
| public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { |
| if (visitor.enterExpressionStatement(this)) { |
| return visitor.leaveExpressionStatement(setExpression((Expression)expression.accept(visitor))); |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public void toString(final StringBuilder sb, final boolean printTypes) { |
| expression.toString(sb, printTypes); |
| } |
| |
| /** |
| * Return the expression to be executed |
| * @return the expression |
| */ |
| public Expression getExpression() { |
| return expression; |
| } |
| |
| /** |
| * Reset the expression to be executed |
| * @param expression the expression |
| * @return new or same execute node |
| */ |
| public ExpressionStatement setExpression(final Expression expression) { |
| if (this.expression == expression) { |
| return this; |
| } |
| return new ExpressionStatement(this, expression); |
| } |
| } |