Boolean.cc

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/*
 * Boolean.cc
 *
 * Smalltalk like class library for C++
 * Boolean wrapper.
 *
 * Copyright (c) 2003 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stlib/Boolean.h>
#include <stlib/String.h>
#include <stlib/Stream.h>
#include <stlib/Visitor.h>

using namespace Core;

Boolean Boolean::True(true);
Boolean Boolean::False(false);

Boolean::Boolean(bool val)
{
    value = val;
}

Boolean::operator bool(void)
{
    return value;
}

/* Class-accessing protocol */
String *Boolean::className(void) const
{
    return new String("Boolean");
}

/* Comparing protocol */
long Boolean::hash(void) const
{
    return value ? 1 : 0;
}

bool Boolean::isEqual(const Object *object) const
{
    return object->isBoolean() &&
           value == ((Boolean *) object)->value;
}

bool Boolean::isEqual(bool cBool) const
{
    return value == cBool;
}

/* Printing protocol */
void Boolean::printOn(Stream *stream) const
{
    stream->nextPutAll(value ? "true" : "false");
}

/* Testing protocol */
bool Boolean::isBoolean(void) const
{
    return true;
}

/* Visiting protocol */
void Boolean::visitBy(Visitor *visitor)
{
    visitor->visitBoolean(this);
}

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