/* * 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(); } }