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+
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <utils/algorithm.h>
+
+namespace Utils {
+
+//////// FIND
+template<typename C, typename F>
+[[nodiscard]] typename Utils::optional<typename C::value_type> findOptional(const C &container,
+ F function)
+{
+ auto begin = std::cbegin(container);
+ auto end = std::cend(container);
+
+ auto it = std::find_if(begin, end, function);
+ return it == end ? nullopt : make_optional(*it);
+}
+
+///////// FILTER
+template<typename C, typename T = typename C::value_type>
+[[nodiscard]] C filterOut(const C &container, const T &value = T())
+{
+ C out;
+ std::copy_if(std::begin(container), std::end(container), inserter(out), [&](const auto &item) {
+ return item != value;
+ });
+ return out;
+}
+
+template<typename C>
+[[nodiscard]] C filtered(const C &container)
+{
+ return filterOut(container, typename C::value_type{});
+}
+
+/////// MODIFY
+template<typename SC, typename C>
+void concat(C &out, const SC &container)
+{
+ std::copy(std::begin(container), std::end(container), inserter(out));
+}
+
+template<typename C, typename T>
+void erase_one(C &container, const T &value)
+{
+ typename C::const_iterator i = std::find(std::cbegin(container), std::cend(container), value);
+ if (i == std::cend(container))
+ return;
+
+ container.erase(i);
+}
+
+template<typename C, typename T>
+void prepend(C &container, const T &value)
+{
+ container.insert(std::cbegin(container), value);
+}
+
+/////// OTHER
+template<typename RC, typename SC>
+[[nodiscard]] RC flatten(const SC &container)
+{
+ RC result;
+
+ for (const auto &innerContainer : container)
+ concat(result, innerContainer);
+
+ return result;
+}
+
+template<template<typename, typename...> class C,
+ typename T,
+ typename... TArgs,
+ typename RT = typename std::decay_t<T>::value_type,
+ typename RC = C<RT>>
+[[nodiscard]] auto flatten(const C<T, TArgs...> &container)
+{
+ using SC = C<T, TArgs...>;
+ return flatten<RC, SC>(container);
+}
+
+} // namespace Utils