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https://github.com/LadybirdBrowser/ladybird.git
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59e01e2813
This was probably forgotten in the last rewrite, this would make IsIntegeral<T> not work for floating points.
479 lines
12 KiB
C++
479 lines
12 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.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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namespace AK::Detail {
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template<bool B, class T = void>
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struct EnableIf {
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};
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template<class T>
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struct EnableIf<true, T> {
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using Type = T;
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};
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template<class T, T v>
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struct IntegralConstant {
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static constexpr T value = v;
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using ValueType = T;
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using Type = IntegralConstant;
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constexpr operator ValueType() const { return value; }
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constexpr ValueType operator()() const { return value; }
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};
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using FalseType = IntegralConstant<bool, false>;
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using TrueType = IntegralConstant<bool, true>;
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template<class T>
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using AddConst = const T;
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template<class T>
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struct __RemoveConst {
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using Type = T;
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};
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template<class T>
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struct __RemoveConst<const T> {
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using Type = T;
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};
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template<class T>
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using RemoveConst = typename __RemoveConst<T>::Type;
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template<class T>
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struct __RemoveVolatile {
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using Type = T;
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};
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template<class T>
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struct __RemoveVolatile<volatile T> {
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using Type = T;
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};
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template<typename T>
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using RemoveVolatile = typename __RemoveVolatile<T>::Type;
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template<class T>
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using RemoveCV = RemoveVolatile<RemoveConst<T>>;
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template<typename...>
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using VoidType = void;
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template<class T>
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inline constexpr bool IsLvalueReference = false;
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template<class T>
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inline constexpr bool IsLvalueReference<T&> = true;
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template<class T>
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inline constexpr bool __IsPointerHelper = false;
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template<class T>
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inline constexpr bool __IsPointerHelper<T*> = true;
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template<class T>
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inline constexpr bool IsPointer = __IsPointerHelper<RemoveCV<T>>;
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template<class>
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inline constexpr bool IsFunction = false;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...)> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...)> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) volatile> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) volatile> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const volatile> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const volatile> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...)&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...)&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) volatile&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) volatile&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const volatile&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const volatile&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) &&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) &&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const&&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const&&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) volatile&&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) volatile&&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args...) const volatile&&> = true;
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template<class Ret, class... Args>
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inline constexpr bool IsFunction<Ret(Args..., ...) const volatile&&> = true;
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template<class T>
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inline constexpr bool IsRvalueReference = false;
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template<class T>
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inline constexpr bool IsRvalueReference<T&&> = true;
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template<class T>
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struct __RemovePointer {
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using Type = T;
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};
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template<class T>
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struct __RemovePointer<T*> {
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using Type = T;
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};
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template<class T>
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struct __RemovePointer<T* const> {
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using Type = T;
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};
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template<class T>
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struct __RemovePointer<T* volatile> {
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using Type = T;
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};
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template<class T>
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struct __RemovePointer<T* const volatile> {
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using Type = T;
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};
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template<typename T>
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using RemovePointer = typename __RemovePointer<T>::Type;
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template<typename T, typename U>
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inline constexpr bool IsSame = false;
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template<typename T>
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inline constexpr bool IsSame<T, T> = true;
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template<bool condition, class TrueType, class FalseType>
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struct __Conditional {
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using Type = TrueType;
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};
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template<class TrueType, class FalseType>
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struct __Conditional<false, TrueType, FalseType> {
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using Type = FalseType;
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};
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template<bool condition, class TrueType, class FalseType>
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using Conditional = typename __Conditional<condition, TrueType, FalseType>::Type;
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template<typename T>
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inline constexpr bool IsNullPointer = IsSame<decltype(nullptr), RemoveCV<T>>;
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template<typename T>
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struct __RemoveReference {
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using Type = T;
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};
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template<class T>
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struct __RemoveReference<T&> {
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using Type = T;
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};
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template<class T>
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struct __RemoveReference<T&&> {
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using Type = T;
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};
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template<typename T>
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using RemoveReference = typename __RemoveReference<T>::Type;
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template<typename T>
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struct __MakeUnsigned {
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using Type = void;
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};
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template<>
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struct __MakeUnsigned<signed char> {
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using Type = unsigned char;
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};
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template<>
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struct __MakeUnsigned<short> {
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using Type = unsigned short;
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};
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template<>
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struct __MakeUnsigned<int> {
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using Type = unsigned int;
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};
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template<>
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struct __MakeUnsigned<long> {
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using Type = unsigned long;
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};
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template<>
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struct __MakeUnsigned<long long> {
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using Type = unsigned long long;
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};
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template<>
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struct __MakeUnsigned<unsigned char> {
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using Type = unsigned char;
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};
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template<>
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struct __MakeUnsigned<unsigned short> {
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using Type = unsigned short;
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};
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template<>
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struct __MakeUnsigned<unsigned int> {
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using Type = unsigned int;
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};
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template<>
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struct __MakeUnsigned<unsigned long> {
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using Type = unsigned long;
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};
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template<>
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struct __MakeUnsigned<unsigned long long> {
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using Type = unsigned long long;
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};
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template<>
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struct __MakeUnsigned<char> {
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using Type = unsigned char;
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};
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template<>
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struct __MakeUnsigned<char8_t> {
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using Type = char8_t;
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};
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template<>
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struct __MakeUnsigned<char16_t> {
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using Type = char16_t;
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};
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template<>
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struct __MakeUnsigned<char32_t> {
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using Type = char32_t;
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};
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template<>
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struct __MakeUnsigned<bool> {
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using Type = bool;
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};
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template<typename T>
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using MakeUnsigned = typename __MakeUnsigned<T>::Type;
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template<typename T>
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struct __MakeSigned {
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using Type = void;
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};
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template<>
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struct __MakeSigned<signed char> {
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using Type = signed char;
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};
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template<>
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struct __MakeSigned<short> {
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using Type = short;
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};
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template<>
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struct __MakeSigned<int> {
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using Type = int;
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};
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template<>
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struct __MakeSigned<long> {
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using Type = long;
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};
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template<>
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struct __MakeSigned<long long> {
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using Type = long long;
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};
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template<>
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struct __MakeSigned<unsigned char> {
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using Type = char;
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};
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template<>
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struct __MakeSigned<unsigned short> {
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using Type = short;
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};
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template<>
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struct __MakeSigned<unsigned int> {
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using Type = int;
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};
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template<>
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struct __MakeSigned<unsigned long> {
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using Type = long;
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};
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template<>
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struct __MakeSigned<unsigned long long> {
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using Type = long long;
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};
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template<>
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struct __MakeSigned<char> {
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using Type = char;
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};
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template<typename T>
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using MakeSigned = typename __MakeSigned<T>::Type;
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template<class T>
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inline constexpr bool IsVoid = IsSame<void, RemoveCV<T>>;
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template<class T>
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inline constexpr bool IsConst = false;
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template<class T>
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inline constexpr bool IsConst<const T> = true;
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template<typename T>
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inline constexpr bool IsEnum = __is_enum(T);
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template<typename T>
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inline constexpr bool IsUnion = __is_union(T);
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template<typename T>
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inline constexpr bool IsClass = __is_class(T);
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template<typename Base, typename Derived>
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inline constexpr bool IsBaseOf = __is_base_of(Base, Derived);
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template<typename T>
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inline constexpr bool __IsIntegral = false;
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template<>
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inline constexpr bool __IsIntegral<bool> = true;
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template<>
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inline constexpr bool __IsIntegral<unsigned char> = true;
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template<>
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inline constexpr bool __IsIntegral<char8_t> = true;
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template<>
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inline constexpr bool __IsIntegral<char16_t> = true;
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template<>
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inline constexpr bool __IsIntegral<char32_t> = true;
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template<>
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inline constexpr bool __IsIntegral<unsigned short> = true;
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template<>
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inline constexpr bool __IsIntegral<unsigned int> = true;
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template<>
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inline constexpr bool __IsIntegral<unsigned long> = true;
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template<>
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inline constexpr bool __IsIntegral<unsigned long long> = true;
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template<typename T>
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inline constexpr bool IsIntegral = __IsIntegral<MakeUnsigned<RemoveCV<T>>>;
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template<typename T>
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inline constexpr bool __IsFloatingPoint = false;
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template<>
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inline constexpr bool __IsFloatingPoint<float> = true;
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template<>
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inline constexpr bool __IsFloatingPoint<double> = true;
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template<>
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inline constexpr bool __IsFloatingPoint<long double> = true;
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template<typename T>
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inline constexpr bool IsFloatingPoint = __IsFloatingPoint<RemoveCV<T>>;
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template<typename ReferenceType, typename T>
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using CopyConst = Conditional<IsConst<ReferenceType>, AddConst<T>, RemoveConst<T>>;
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template<typename... Ts>
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using Void = void;
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template<typename... _Ignored>
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constexpr auto DependentFalse = false;
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template<typename T>
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inline constexpr bool IsSigned = IsSame<T, MakeSigned<T>>;
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template<typename T>
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inline constexpr bool IsUnsigned = IsSame<T, MakeUnsigned<T>>;
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template<typename T>
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inline constexpr bool IsArithmetic = IsIntegral<T> || IsFloatingPoint<T>;
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template<typename T>
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inline constexpr bool IsFundamental = IsArithmetic<T> || IsVoid<T> || IsNullPointer<T>;
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template<typename T, T... Ts>
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struct IntegerSequence {
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using Type = T;
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static constexpr unsigned size() noexcept { return sizeof...(Ts); };
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};
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template<unsigned... Indices>
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using IndexSequence = IntegerSequence<unsigned, Indices...>;
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template<typename T, T N, T... Ts>
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auto make_integer_sequence_impl()
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{
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if constexpr (N == 0)
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return IntegerSequence<T, Ts...> {};
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else
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return make_integer_sequence_impl<T, N - 1, N - 1, Ts...>();
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}
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template<typename T, T N>
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using MakeIntegerSequence = decltype(make_integer_sequence_impl<T, N>());
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template<unsigned N>
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using MakeIndexSequence = MakeIntegerSequence<unsigned, N>;
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template<typename T>
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struct __IdentityType {
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using Type = T;
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};
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template<typename T>
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using IdentityType = typename __IdentityType<T>::Type;
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template<class T>
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requires(IsEnum<T>) using UnderlyingType = __underlying_type(T);
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template<typename T>
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inline constexpr bool IsTrivial = __is_trivial(T);
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template<typename T>
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inline constexpr bool IsTriviallyCopyable = __is_trivially_copyable(T);
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}
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using AK::Detail::AddConst;
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using AK::Detail::Conditional;
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using AK::Detail::CopyConst;
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using AK::Detail::DependentFalse;
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using AK::Detail::EnableIf;
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using AK::Detail::FalseType;
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using AK::Detail::IdentityType;
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using AK::Detail::IndexSequence;
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using AK::Detail::IntegerSequence;
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using AK::Detail::IsArithmetic;
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using AK::Detail::IsBaseOf;
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using AK::Detail::IsClass;
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using AK::Detail::IsConst;
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using AK::Detail::IsEnum;
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using AK::Detail::IsFloatingPoint;
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using AK::Detail::IsFunction;
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using AK::Detail::IsFundamental;
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using AK::Detail::IsIntegral;
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using AK::Detail::IsLvalueReference;
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using AK::Detail::IsNullPointer;
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using AK::Detail::IsPointer;
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using AK::Detail::IsRvalueReference;
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using AK::Detail::IsSame;
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using AK::Detail::IsSigned;
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using AK::Detail::IsTrivial;
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using AK::Detail::IsTriviallyCopyable;
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using AK::Detail::IsUnion;
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using AK::Detail::IsUnsigned;
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using AK::Detail::IsVoid;
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using AK::Detail::MakeIndexSequence;
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using AK::Detail::MakeIntegerSequence;
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using AK::Detail::MakeSigned;
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using AK::Detail::MakeUnsigned;
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using AK::Detail::RemoveConst;
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using AK::Detail::RemoveCV;
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using AK::Detail::RemovePointer;
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using AK::Detail::RemoveReference;
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using AK::Detail::RemoveVolatile;
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using AK::Detail::TrueType;
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using AK::Detail::UnderlyingType;
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using AK::Detail::Void;
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