fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
36 lines
1.0 KiB
C++
36 lines
1.0 KiB
C++
/*
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* Copyright (C) 2020-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <type_traits>
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#include <seastar/util/concepts.hh>
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#include <compare>
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template <typename Func, typename T>
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concept Disposer = requires (Func f, T* val) {
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{ f(val) } noexcept -> std::same_as<void>;
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};
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template <typename Key1, typename Key2, typename Less>
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concept LessComparable = requires (const Key1& a, const Key2& b, Less less) {
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{ less(a, b) } -> std::same_as<bool>;
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{ less(b, a) } -> std::same_as<bool>;
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};
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template <typename Key1, typename Key2, typename Less>
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concept LessNothrowComparable = LessComparable<Key1, Key2, Less> && std::is_nothrow_invocable_v<Less, Key1, Key2>;
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template <typename T1, typename T2, typename Compare>
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concept Comparable = requires (const T1& a, const T2& b, Compare cmp) {
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// The Comparable is trichotomic comparator that should return
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// negative value when a < b
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// zero when a == b
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// positive value when a > b
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{ cmp(a, b) } -> std::same_as<std::strong_ordering>;
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};
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