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// -*- C++ -*-
/***************************************************************************
* blitz/listinit.h Classes for initialization lists
*
* $Id$
*
* Copyright (C) 1997-2011 Todd Veldhuizen <tveldhui@acm.org>
*
* This file is a part of Blitz.
*
* Blitz 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 3
* of the License, or (at your option) any later version.
*
* Blitz 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 Blitz. If not, see <http://www.gnu.org/licenses/>.
*
* Suggestions: blitz-devel@lists.sourceforge.net
* Bugs: blitz-support@lists.sourceforge.net
*
* For more information, please see the Blitz++ Home Page:
* https://sourceforge.net/projects/blitz/
*
***************************************************************************/
/*
* Initialization lists provide a convenient way to set the elements
* of an array. For example,
*
* Array<int,2> A(3,3);
* A = 1, 0, 0,
* 0, 1, 0,
* 0, 0, 1;
*/
#ifndef BZ_LISTINIT_H
#define BZ_LISTINIT_H
BZ_NAMESPACE(blitz)
template<typename T_numtype, typename T_iterator>
class ListInitializer {
public:
ListInitializer(T_iterator iter)
: iter_(iter)
{
}
ListInitializer<T_numtype, T_iterator> operator,(T_numtype x)
{
*iter_ = x;
++iter_;
return ListInitializer<T_numtype, T_iterator>(iter_);
}
private:
ListInitializer();
protected:
T_iterator iter_;
};
template<typename T_array, typename T_iterator = _bz_typename T_array::T_numtype*>
class ListInitializationSwitch {
public:
typedef _bz_typename T_array::T_numtype T_numtype;
ListInitializationSwitch(const ListInitializationSwitch<T_array>& lis)
: array_(lis.array_), value_(lis.value_),
wipeOnDestruct_(true)
{
lis.disable();
}
ListInitializationSwitch(T_array& array, T_numtype value)
: array_(array), value_(value), wipeOnDestruct_(true)
{ }
~ListInitializationSwitch()
{
if (wipeOnDestruct_)
array_.initialize(value_);
}
ListInitializer<T_numtype, T_iterator> operator,(T_numtype x)
{
wipeOnDestruct_ = false;
T_iterator iter = array_.getInitializationIterator();
*iter = value_;
++iter;
//T_iterator iter2 = iter + 1;
*iter = x;
++iter;
return ListInitializer<T_numtype, T_iterator>(iter);
}
void disable() const
{
wipeOnDestruct_ = false;
}
private:
ListInitializationSwitch();
protected:
T_array& array_;
T_numtype value_;
mutable bool wipeOnDestruct_;
};
BZ_NAMESPACE_END
#endif // BZ_LISTINIT_H
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