/*
* xtc - The eXTensible Compiler
* Copyright (C) 2006-2007 Robert Grimm
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package xtc.type;
import java.io.IOException;
/**
* The pseudo-type indicating a malformed type.
*
* @author Robert Grimm
* @version $Revision: 1.14 $
*/
public class ErrorT extends Type {
/** The canonical error type. */
public static final ErrorT TYPE = new ErrorT();
/** Seal the canonical type. */
static {
TYPE.seal();
}
/** Create a new error type. */
public ErrorT() {
// Nothing to do.
}
/**
* Create a new error type.
*
* @param template The type whose annotations to copy.
*/
public ErrorT(Type template) {
super(template);
}
public ErrorT copy() {
return new ErrorT(this);
}
public Type.Tag tag() {
return Type.Tag.ERROR;
}
public boolean isError() {
return true;
}
public int hashCode() {
return 7;
}
public boolean equals(Object o) {
if (! (o instanceof Type)) return false;
return resolve(o).isError();
}
public void write(Appendable out) throws IOException {
out.append("<error>");
}
public String toString() {
return "<error>";
}
}