23 lines
652 B
C++
23 lines
652 B
C++
/*
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* SPDX-FileCopyrightText: Dora "cat" <cat@thenight.club>
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public License,
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* v. 2.0. If a copy of the MPL was not distributed with this file, You can
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* obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef GUARD_TOURMALINE_HASHING_H
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#define GUARD_TOURMALINE_HASHING_H
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#include <concepts>
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#include <functional>
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namespace Tourmaline::Containers {
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template <typename T>
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concept Hashable = requires(T x) {
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std::equality_comparable<T>;
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{ std::hash<T>{}(x) } -> std::convertible_to<std::size_t>;
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};
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} // namespace Tourmaline::Containers
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#endif
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