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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_O3TL_ENUMRANGE_HXX
#define INCLUDED_O3TL_ENUMRANGE_HXX
#include <sal/config.h>
namespace o3tl {
///
/// This is a container convenience class iterating over scoped enumerations.
///
/// This assumes that the 'enum class' definition
/// - starts at zero
/// - has no holes in its sequence of values
/// - defines a value called LAST which refers to the greatest constant.
///
/// Use like this:
/// enum class COLOR { RED, GREEN, BLUE, LAST=BLUE };
/// for( auto e : o3tl::enumrange<Color>() )
/// .....;
///
/// \param T the 'enum class' type.
template< typename T>
class enumrange
{
public:
class Iterator
{
public:
Iterator( int value ) :
m_value( value )
{
}
T operator*( void ) const
{
return static_cast<T>(m_value);
}
void operator++( void )
{
++m_value;
}
bool operator!=( Iterator rhs )
{
return m_value != rhs.m_value;
}
private:
int m_value;
};
};
template< typename T >
typename enumrange<T>::Iterator begin( enumrange<T> )
{
return typename enumrange<T>::Iterator( (int)0 );
}
template< typename T >
typename enumrange<T>::Iterator end( enumrange<T> )
{
return typename enumrange<T>::Iterator( (static_cast<int>(T::LAST)) + 1 );
}
}; // namespace o3tl
#endif /* INCLUDED_O3TL_ENUMRANGE_HXX */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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