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source/ps/Algorithm.h
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/* Copyright (C) 2022 Wildfire Games. | |||||
* This file is part of 0 A.D. | |||||
* | |||||
* 0 A.D. 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 2 of the License, or | |||||
* (at your option) any later version. | |||||
* | |||||
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>. | |||||
*/ | |||||
#ifndef INCLUDED_ALGORITHM | |||||
#define INCLUDED_ALGORITHM | |||||
#include "precompiled.h" | |||||
#include <algorithm> | |||||
#include <functional> | |||||
#include <iterator> | |||||
#include <utility> | |||||
// Implement algorithms which wrap/extend the standard library. | |||||
namespace PS | |||||
{ | |||||
struct Identity | |||||
{ | |||||
template<typename T> | |||||
constexpr T&& operator() (T&& v) | |||||
{ | |||||
return std::forward<T>(v); | |||||
} | |||||
}; | |||||
template<typename R, typename T, typename Proj = Identity> | |||||
constexpr auto Find(R&& r, const T& value, Proj proj = {}) | |||||
{ | |||||
return std::find_if(std::begin(r), std::end(r), [&](auto&& elem) | |||||
{ | |||||
return std::invoke(proj, std::forward<decltype(elem)>(elem)) == value; | |||||
}); | |||||
} | |||||
} | |||||
#endif // INCLUDED_ALGORITHM |
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