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/*
* Anarres C Preprocessor
* Copyright (c) 2007-2008, Shevek
*
* 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 org.anarres.cpp;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Iterator;
import static org.anarres.cpp.Token.*;
/**
* A macro argument.
*
* This encapsulates a raw and preprocessed token stream.
*/
/* pp */ class Argument extends ArrayList<Token> {
public static final int NO_ARGS = -1;
private List<Token> expansion;
public Argument() {
this.expansion = null;
}
public void addToken(Token tok) {
add(tok);
}
/* pp */ void expand(Preprocessor p)
throws IOException,
LexerException {
/* Cache expansion. */
if (expansion == null) {
this.expansion = p.expand(this);
// System.out.println("Expanded arg " + this);
}
}
public Iterator<Token> expansion() {
return expansion.iterator();
}
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("Argument(");
// buf.append(super.toString());
buf.append("raw=[ ");
for (int i = 0; i < size(); i++)
buf.append(get(i).getText());
buf.append(" ];expansion=[ ");
if (expansion == null)
buf.append("null");
else
for (int i = 0; i < expansion.size(); i++)
buf.append(expansion.get(i).getText());
buf.append(" ])");
return buf.toString();
}
}
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