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/* Gobby - GTK-based collaborative text editor
* Copyright (C) 2008-2014 Armin Burgmeier <armin@arbur.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _GOBBY_DEFAULT_ACCUMULATOR_HPP_
#define _GOBBY_DEFAULT_ACCUMULATOR_HPP_
namespace Gobby
{
/** Accumulator for signals with return type that defaults to a value if no
* signal handler is connected.
*/
template<typename return_type, return_type default_return>
class default_accumulator {
public:
typedef return_type result_type;
template<typename iterator>
result_type operator()(iterator begin, iterator end) const {
return_type result = default_return;
for(; begin != end; ++ begin)
result = *begin;
return result;
}
};
} // namespace Gobby
#endif // _GOBBY_DEFAULT_ACCUMULATOR_HPP_
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