/*
* Copyright (c) 2011, IETR/INSA of Rennes
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of the IETR/INSA of Rennes nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package net.sf.orcc.util.sexp;
/**
* This class defines a s-expression.
*
* @author Matthieu Wipliez
*
*/
public abstract class SExp {
/**
* Returns <code>true</code> if this s-expression is atomic.
*
* @return <code>true</code> if this s-expression is atomic
*/
public boolean isAtomic() {
return false;
}
/**
* Returns <code>true</code> if this s-expression is a list.
*
* @return <code>true</code> if this s-expression is a list
*/
public boolean isList() {
return false;
}
/**
* Returns <code>true</code> if this s-expression is a number.
*
* @return <code>true</code> if this s-expression is a number
*/
public boolean isNumber() {
return false;
}
/**
* Returns <code>true</code> if this s-expression is a string.
*
* @return <code>true</code> if this s-expression is a string
*/
public boolean isString() {
return false;
}
/**
* Returns <code>true</code> if this s-expression is a symbol.
*
* @return <code>true</code> if this s-expression is a symbol
*/
public boolean isSymbol() {
return false;
}
}