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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*
*/
/********************************************
DISCLAIMER:
This is a wrapper code to mimic the relevant std:: class
Please use it ONLY when porting an existing code e.g. from the original sources
For all new development please use classes from Common::
*********************************************/
#ifndef COMMON_STD_FUNCTIONAL_H
#define COMMON_STD_FUNCTIONAL_H
namespace Std {
template <class _Arg, class _Result>
struct unary_function { // base class for unary functions
using argument_type = _Arg;
using result_type = _Result;
};
template <class _Arg1, class _Arg2, class _Result>
struct binary_function { // base class for binary functions
using first_argument_type = _Arg1;
using second_argument_type = _Arg2;
using result_type = _Result;
};
template <typename _Fty>
struct function {
_Fty *_fn;
function() : _fn(nullptr) {}
function(_Fty *fn) : _fn(fn) {}
operator _Fty &() {
return *_fn;
}
operator bool() const {
return _fn != nullptr;
}
};
} // namespace Std
#endif
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