35 lines
1.3 KiB
C++
35 lines
1.3 KiB
C++
// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <algorithm>
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#include <functional>
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// Algorithms that operate on iterators, much like the <algorithm> header.
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//
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// Note: If the algorithm is not general-purpose and/or doesn't operate on iterators,
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// it should probably not be placed within this header.
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namespace Common {
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template <class ForwardIt, class T, class Compare = std::less<>>
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[[nodiscard]] ForwardIt BinaryFind(ForwardIt first, ForwardIt last, const T& value,
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Compare comp = {}) {
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// Note: BOTH type T and the type after ForwardIt is dereferenced
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// must be implicitly convertible to BOTH Type1 and Type2, used in Compare.
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// This is stricter than lower_bound requirement (see above)
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first = std::lower_bound(first, last, value, comp);
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return first != last && !comp(value, *first) ? first : last;
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}
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template <typename T, typename Func, typename... Args>
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T FoldRight(T initial_value, Func&& func, Args&&... args) {
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T value{initial_value};
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const auto high_func = [&value, &func]<typename U>(U x) { value = func(value, x); };
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(std::invoke(high_func, std::forward<Args>(args)), ...);
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return value;
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}
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} // namespace Common
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