/* | |
* | |
* Copyright 2002-2004 The Ant-Contrib project | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package net.sf.antcontrib.cpptasks.parser; | |
/** | |
* An base class for objects that represent the state of an AbstractParser. | |
* | |
* @author CurtArnold | |
* @see AbstractParser | |
*/ | |
public abstract class AbstractParserState { | |
private AbstractParser parser; | |
protected AbstractParserState(AbstractParser parser) { | |
if (parser == null) { | |
throw new NullPointerException("parser"); | |
} | |
this.parser = parser; | |
} | |
/** | |
* Consume a character | |
* | |
* @return new state, may be null to ignore the rest of the line | |
*/ | |
public abstract AbstractParserState consume(char ch); | |
protected AbstractParser getParser() { | |
return parser; | |
} | |
} |