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67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/********************************************
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DISCLAIMER:
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This is a wrapper code to mimic the relevant std:: class
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Please use it ONLY when porting an existing code e.g. from the original sources
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For all new development please use classes from Common::
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*********************************************/
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#ifndef COMMON_STD_FUNCTIONAL_H
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#define COMMON_STD_FUNCTIONAL_H
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namespace Std {
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template <class _Arg, class _Result>
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struct unary_function { // base class for unary functions
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using argument_type = _Arg;
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using result_type = _Result;
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};
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template <class _Arg1, class _Arg2, class _Result>
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struct binary_function { // base class for binary functions
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using first_argument_type = _Arg1;
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using second_argument_type = _Arg2;
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using result_type = _Result;
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};
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template <typename _Fty>
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struct function {
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_Fty *_fn;
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function() : _fn(nullptr) {}
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function(_Fty *fn) : _fn(fn) {}
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operator _Fty &() {
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return *_fn;
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}
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operator bool() const {
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return _fn != nullptr;
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}
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};
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} // namespace Std
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#endif
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