46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2022, Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include <concepts>
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#include <string>
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#include <string_view>
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namespace cruft::concepts {
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/// A literal c-string character array.
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template <typename T>
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concept c_string =
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std::is_array_v<std::remove_cvref_t<T>> and
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std::is_same_v<
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std::remove_cvref_t<
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std::remove_all_extents_t<
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std::remove_cvref_t<T>
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>
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>,
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char
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>;
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/// A type that behaves like a string. ie, a sequence of characters
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template <typename T>
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concept stringy =
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std::same_as<T, std::string> or
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std::same_as<T, std::string_view> or
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std::same_as<T, char const*> or
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std::same_as<T, char *> or
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c_string<T>;
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/// A type that behaves like a string _and_ has a null terminator
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template <typename T>
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concept null_stringy =
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std::same_as<T, std::string> or
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std::same_as<T, char const*> or
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std::same_as<T, char *>;
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}
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