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/*
* Anarres C Preprocessor
* Copyright (C) 2007 Shevek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
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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