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fcdf3014f1
`Optional` and `Variant` both use essentially the same pattern of only declaring a copy constructor/move constructor/destructor and copy/move assignment operator if all of their template parameters have one. Let's move these into a macro to avoid code duplication and to give a name to the thing we are trying to accomplish.
70 lines
2.6 KiB
C
70 lines
2.6 KiB
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#define AK_MAKE_NONCOPYABLE(c) \
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private: \
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c(c const&) = delete; \
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c& operator=(c const&) = delete
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#define AK_MAKE_NONMOVABLE(c) \
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private: \
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c(c&&) = delete; \
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c& operator=(c&&) = delete
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#define AK_MAKE_DEFAULT_MOVABLE(c) \
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public: \
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c(c&&) = default; \
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c& operator=(c&&) = default
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#define AK_MAKE_DEFAULT_COPYABLE(c) \
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public: \
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c(c const&) = default; \
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c& operator=(c const&) = default
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#define AK_MAKE_CONDITIONALLY_NONMOVABLE(c, ...) \
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public: \
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c(c&&) \
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requires(!(AK::Detail::IsMoveConstructible __VA_ARGS__)) \
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= delete; \
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c& operator=(c&&) \
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requires(!(AK::Detail::IsMoveConstructible __VA_ARGS__) \
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|| !(AK::Detail::IsDestructible __VA_ARGS__)) \
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= delete
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#define AK_MAKE_CONDITIONALLY_MOVABLE(c, T) \
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AK_MAKE_CONDITIONALLY_NONMOVABLE(c, T); \
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c(c&&) = default; \
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c& operator=(c&&) = default
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#define AK_MAKE_CONDITIONALLY_NONCOPYABLE(c, ...) \
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public: \
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c(c const&) \
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requires(!(AK::Detail::IsCopyConstructible __VA_ARGS__)) \
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= delete; \
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c& operator=(c const&) \
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requires(!(AK::Detail::IsCopyConstructible __VA_ARGS__) \
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|| !(AK::Detail::IsDestructible __VA_ARGS__)) \
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= delete
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#define AK_MAKE_CONDITIONALLY_COPYABLE(c, ...) \
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AK_MAKE_CONDITIONALLY_NONCOPYABLE(c, __VA_ARGS__); \
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c(c const&) = default; \
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c& operator=(c const&) = default
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#define AK_MAKE_CONDITIONALLY_NONDESTRUCTIBLE(c, ...) \
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public: \
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~c() \
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requires(!(AK::Detail::IsDestructible __VA_ARGS__)) \
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= delete
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#define AK_MAKE_CONDITIONALLY_DESTRUCTIBLE(c, ...) \
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public: \
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~c() \
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requires(!(AK::Detail::IsDestructible __VA_ARGS__)) \
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= delete; \
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~c() = default
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