/*
* xtc - The eXTensible Compiler
* Copyright (C) 2005-2007 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;
/**
* A pointer type.
*
* @author Robert Grimm
* @version $Revision: 1.31 $
*/
public class PointerT extends DerivedT {
/** The canonical pointer to void. */
public static final PointerT TO_VOID = new PointerT(VoidT.TYPE);
static {
TO_VOID.seal();
}
/** The pointed-to type. */
private Type type;
/**
* Create a new pointer type.
*
* @param type The pointed-to type.
*/
public PointerT(Type type) {
this.type = type;
}
/**
* Create a new pointer type.
*
* @param template The type whose annotations to copy.
* @param type The pointed-to type.
*/
public PointerT(Type template, Type type) {
super(template);
this.type = type;
}
public PointerT copy() {
return new PointerT(this, type.copy());
}
public Type seal() {
if (! isSealed()) {
super.seal();
type.seal();
}
return this;
}
public Type.Tag tag() {
return Type.Tag.POINTER;
}
public boolean isPointer() {
return true;
}
public PointerT toPointer() {
return this;
}
/**
* Get the pointed-to type.
*
* @return The pointed-to type.
*/
public Type getType() {
return type;
}
public int hashCode() {
return type.hashCode();
}
public boolean equals(Object o) {
if (! (o instanceof Type)) return false;
Type t = resolve(o);
if (this == t) return true;
if (! t.isPointer()) return false;
return type.equals(((PointerT)t).type);
}
public void write(Appendable out) throws IOException {
out.append("pointer(");
type.write(out);
out.append(')');
}
}