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refactor(*): remove FTypeInfo and replace it with the native std::type_info

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This commit is contained in:
_Redstone_c_
2022-05-12 23:36:32 +08:00
parent db5ed179c6
commit eeef55e9b4
11 changed files with 229 additions and 528 deletions
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167
Redcraft.Utility/Source/Public/Templates/Any.h
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@ -5,8 +5,8 @@
#include "Memory/Alignment.h"
#include "Templates/Utility.h"
#include "Templates/TypeHash.h"
#include "Memory/MemoryOperator.h"
#include "TypeTraits/TypeTraits.h"
#include "Miscellaneous/TypeInfo.h"
#include "Miscellaneous/AssertionMacros.h"
// NOTE: Disable alignment limit warning
@ -16,18 +16,6 @@ NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)
NAMESPACE_PRIVATE_BEGIN
enum class EAnyRepresentation : uint8
{
Trivial, // Trivial
// Inline, // InlineAllocation
Small, // Trivial & Inline
Big, // HeapAllocation
};
NAMESPACE_PRIVATE_END
inline constexpr size_t ANY_DEFAULT_INLINE_SIZE = 64 - sizeof(uintptr);
inline constexpr size_t ANY_DEFAULT_INLINE_ALIGNMENT = 16;
@ -45,15 +33,15 @@ struct alignas(InlineAlignment) TAny
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().CopyConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().CopyConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
HeapAllocation = Memory::Malloc(GetTypeInfo().GetTypeSize(), GetTypeInfo().GetTypeAlignment());
GetTypeInfo().CopyConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Big:
HeapAllocation = Memory::Malloc(GetTypeInfoImpl().TypeSize, GetTypeInfoImpl().TypeAlignment);
GetTypeInfoImpl().CopyConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
default: check_no_entry();
}
@ -66,13 +54,13 @@ struct alignas(InlineAlignment) TAny
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().MoveConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().MoveConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
case EAnyRepresentation::Big:
HeapAllocation = InValue.HeapAllocation;
InValue.TypeInfo = 0;
break;
@ -112,12 +100,12 @@ struct alignas(InlineAlignment) TAny
{
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
GetTypeInfo().CopyAssign(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
case EAnyRepresentation::Big:
GetTypeInfoImpl().CopyAssignImpl(GetAllocation(), InValue.GetAllocation());
break;
default: check_no_entry();
}
@ -130,15 +118,15 @@ struct alignas(InlineAlignment) TAny
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().CopyConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().CopyConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
HeapAllocation = Memory::Malloc(GetTypeInfo().GetTypeSize(), GetTypeInfo().GetTypeAlignment());
GetTypeInfo().CopyConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Big:
HeapAllocation = Memory::Malloc(GetTypeInfoImpl().TypeSize, GetTypeInfoImpl().TypeAlignment);
GetTypeInfoImpl().CopyConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
default: check_no_entry();
}
@ -159,13 +147,13 @@ struct alignas(InlineAlignment) TAny
{
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().MoveAssign(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().MoveAssignImpl(GetAllocation(), InValue.GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
case EAnyRepresentation::Big:
ResetImpl();
HeapAllocation = InValue.HeapAllocation;
InValue.TypeInfo = 0;
@ -181,13 +169,13 @@ struct alignas(InlineAlignment) TAny
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
Memory::Memcpy(InlineAllocation, InValue.InlineAllocation);
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().MoveConstruct(GetAllocation(), InValue.GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().MoveConstructImpl(GetAllocation(), InValue.GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
case EAnyRepresentation::Big:
HeapAllocation = InValue.HeapAllocation;
InValue.TypeInfo = 0;
break;
@ -230,12 +218,12 @@ struct alignas(InlineAlignment) TAny
return GetValue<SelectedType>();
}
constexpr const FTypeInfo& GetTypeInfo() const { return IsValid() ? *reinterpret_cast<FTypeInfo*>(TypeInfo & ~RepresentationMask) : Typeid(void); }
constexpr const type_info& GetTypeInfo() const { return IsValid() ? *GetTypeInfoImpl().TypeInfo : typeid(void); }
constexpr bool IsValid() const { return TypeInfo != 0; }
constexpr explicit operator bool() const { return TypeInfo != 0; }
template <typename T> constexpr bool HoldsAlternative() const { return IsValid() ? GetTypeInfo() == Typeid(T) : false; }
template <typename T> constexpr bool HoldsAlternative() const { return IsValid() ? GetTypeInfo() == typeid(T) : false; }
template <typename T> requires TIsSame<T, typename TDecay<T>::Type>::Value && TIsObject<typename TDecay<T>::Type>::Value && (!TIsArray<typename TDecay<T>::Type>::Value) && TIsDestructible<typename TDecay<T>::Type>::Value
constexpr T& GetValue() & { checkf(HoldsAlternative<T>(), TEXT("It is an error to call GetValue() on an wrong TAny. Please either check HoldsAlternative() or use Get(DefaultValue) instead.")); return *reinterpret_cast< T*>(GetAllocation()); }
@ -263,8 +251,9 @@ struct alignas(InlineAlignment) TAny
FORCEINLINE size_t GetTypeHash() const
{
using NAMESPACE_REDCRAFT::GetTypeHash;
if (!IsValid()) return 20090007;
return HashCombine(GetTypeInfo().GetTypeHash(), GetTypeInfo().HashItem(GetAllocation()));
return HashCombine(GetTypeHash(GetTypeInfo()), GetTypeInfoImpl().HashImpl(GetAllocation()));
}
FORCEINLINE void Swap(TAny& InValue)
@ -287,7 +276,7 @@ struct alignas(InlineAlignment) TAny
if (GetTypeInfo() == InValue.GetTypeInfo())
{
GetTypeInfo().SwapItem(GetAllocation(), InValue.GetAllocation());
GetTypeInfoImpl().SwapImpl(GetAllocation(), InValue.GetAllocation());
return;
}
@ -300,6 +289,64 @@ private:
static constexpr uintptr_t RepresentationMask = 3;
enum class EAnyRepresentation : uint8
{
Trivial, // Trivial
// Inline, // InlineAllocation
Small, // Trivial & Inline
Big, // HeapAllocation
};
struct FTypeInfoImpl
{
const type_info* TypeInfo;
const size_t TypeSize;
const size_t TypeAlignment;
using FCopyConstructImpl = void(*)(void*, const void*);
using FMoveConstructImpl = void(*)(void*, void*);
using FCopyAssignImpl = void(*)(void*, const void*);
using FMoveAssignImpl = void(*)(void*, void*);
using FDestroyImpl = void(*)(void* );
using FEqualityCompareImpl = bool (*)(const void*, const void*);
using FSynthThreeWayCompareImpl = partial_ordering (*)(const void*, const void*);
using FHashImpl = size_t (*)(const void* );
using FSwapImpl = void (*)( void*, void*);
const FCopyConstructImpl CopyConstructImpl;
const FMoveConstructImpl MoveConstructImpl;
const FCopyAssignImpl CopyAssignImpl;
const FMoveAssignImpl MoveAssignImpl;
const FDestroyImpl DestroyImpl;
const FEqualityCompareImpl EqualityCompareImpl;
const FSynthThreeWayCompareImpl SynthThreeWayCompareImpl;
const FHashImpl HashImpl;
const FSwapImpl SwapImpl;
template <typename T>
constexpr FTypeInfoImpl(TInPlaceType<T>)
: TypeInfo (&typeid(T))
, TypeSize ( sizeof(T))
, TypeAlignment (alignof(T))
, CopyConstructImpl ([](void* A, const void* B) { if constexpr (requires(T* A, const T* B) { Memory::CopyConstruct (A, B); }) Memory::CopyConstruct (reinterpret_cast<T*>(A), reinterpret_cast<const T*>(B)); else checkf(false, TEXT("The type '%s' is not copy constructible."), typeid(Types).name()); })
, MoveConstructImpl ([](void* A, void* B) { if constexpr (requires(T* A, T* B) { Memory::MoveConstruct (A, B); }) Memory::MoveConstruct (reinterpret_cast<T*>(A), reinterpret_cast< T*>(B)); else checkf(false, TEXT("The type '%s' is not move constructible."), typeid(Types).name()); })
, CopyAssignImpl ([](void* A, const void* B) { if constexpr (requires(T* A, const T* B) { Memory::CopyAssign (A, B); }) Memory::CopyAssign (reinterpret_cast<T*>(A), reinterpret_cast<const T*>(B)); else checkf(false, TEXT("The type '%s' is not copy assignable."), typeid(Types).name()); })
, MoveAssignImpl ([](void* A, void* B) { if constexpr (requires(T* A, T* B) { Memory::MoveAssign (A, B); }) Memory::MoveAssign (reinterpret_cast<T*>(A), reinterpret_cast< T*>(B)); else checkf(false, TEXT("The type '%s' is not move assignable."), typeid(Types).name()); })
, DestroyImpl ([](void* A ) { if constexpr (requires(T* A ) { Memory::Destruct (A ); }) Memory::Destruct (reinterpret_cast<T*>(A) ); else checkf(false, TEXT("The type '%s' is not destructible."), typeid(Types).name()); })
, EqualityCompareImpl ([](const void* A, const void* B) -> bool { if constexpr (CEqualityComparable<T> ) return (*reinterpret_cast<const T*>(A) == *reinterpret_cast<const T*>(B)); else checkf(false, TEXT("The type '%s' is not equality comparable."), typeid(T).name()); return false; })
, SynthThreeWayCompareImpl ([](const void* A, const void* B) -> partial_ordering { if constexpr (CSynthThreeWayComparable<T>) return NAMESPACE_REDCRAFT::SynthThreeWayCompare (*reinterpret_cast<const T*>(A), *reinterpret_cast<const T*>(B)); else checkf(false, TEXT("The type '%s' is not synth three-way comparable."), typeid(T).name()); return partial_ordering::unordered; })
, HashImpl ([](const void* A ) -> size_t { if constexpr (CHashable<T> ) return NAMESPACE_REDCRAFT::GetTypeHash (*reinterpret_cast<const T*>(A) ); else checkf(false, TEXT("The type '%s' is not hashable."), typeid(T).name()); return 1080551797; })
, SwapImpl ([]( void* A, void* B) -> void { if constexpr (CSwappable<T> ) NAMESPACE_REDCRAFT::Swap (*reinterpret_cast< T*>(A), *reinterpret_cast< T*>(B)); else checkf(false, TEXT("The type '%s' is not swappable."), typeid(T).name()); })
{ }
};
union
{
TAlignedStorage<InlineSize, 1>::Type InlineAllocation;
@ -308,15 +355,17 @@ private:
uintptr TypeInfo;
constexpr NAMESPACE_PRIVATE::EAnyRepresentation GetRepresentation() const { return static_cast<NAMESPACE_PRIVATE::EAnyRepresentation>(TypeInfo & RepresentationMask); }
constexpr EAnyRepresentation GetRepresentation() const { return static_cast<EAnyRepresentation>(TypeInfo & RepresentationMask); }
constexpr const FTypeInfoImpl& GetTypeInfoImpl() const { return *reinterpret_cast<const FTypeInfoImpl*>(TypeInfo & ~RepresentationMask); }
constexpr void* GetAllocation() { return GetRepresentation() == NAMESPACE_PRIVATE::EAnyRepresentation::Trivial || GetRepresentation() == NAMESPACE_PRIVATE::EAnyRepresentation::Small ? &InlineAllocation : HeapAllocation; }
constexpr const void* GetAllocation() const { return GetRepresentation() == NAMESPACE_PRIVATE::EAnyRepresentation::Trivial || GetRepresentation() == NAMESPACE_PRIVATE::EAnyRepresentation::Small ? &InlineAllocation : HeapAllocation; }
constexpr void* GetAllocation() { return GetRepresentation() == EAnyRepresentation::Trivial || GetRepresentation() == EAnyRepresentation::Small ? &InlineAllocation : HeapAllocation; }
constexpr const void* GetAllocation() const { return GetRepresentation() == EAnyRepresentation::Trivial || GetRepresentation() == EAnyRepresentation::Small ? &InlineAllocation : HeapAllocation; }
template <typename SelectedType, typename... Types>
FORCEINLINE void EmplaceImpl(Types&&... Args)
{
TypeInfo = reinterpret_cast<uintptr>(&Typeid(SelectedType));
static constexpr const FTypeInfoImpl SelectedTypeInfo(InPlaceType<SelectedType>);
TypeInfo = reinterpret_cast<uintptr>(&SelectedTypeInfo);
constexpr bool bIsInlineStorable = sizeof(SelectedType) <= InlineSize && alignof(SelectedType) <= InlineAlignment;
constexpr bool bIsTriviallyStorable = bIsInlineStorable && TIsTrivial<SelectedType>::Value && TIsTriviallyCopyable<SelectedType>::Value;
@ -324,17 +373,17 @@ private:
if constexpr (bIsTriviallyStorable)
{
new(&InlineAllocation) SelectedType(Forward<Types>(Args)...);
TypeInfo |= static_cast<uintptr>(NAMESPACE_PRIVATE::EAnyRepresentation::Trivial);
TypeInfo |= static_cast<uintptr>(EAnyRepresentation::Trivial);
}
else if constexpr (bIsInlineStorable)
{
new(&InlineAllocation) SelectedType(Forward<Types>(Args)...);
TypeInfo |= static_cast<uintptr>(NAMESPACE_PRIVATE::EAnyRepresentation::Small);
TypeInfo |= static_cast<uintptr>(EAnyRepresentation::Small);
}
else
{
HeapAllocation = new SelectedType(Forward<Types>(Args)...);
TypeInfo |= static_cast<uintptr>(NAMESPACE_PRIVATE::EAnyRepresentation::Big);
TypeInfo |= static_cast<uintptr>(EAnyRepresentation::Big);
}
}
@ -344,13 +393,13 @@ private:
switch (GetRepresentation())
{
case NAMESPACE_PRIVATE::EAnyRepresentation::Trivial:
case EAnyRepresentation::Trivial:
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Small:
GetTypeInfo().Destroy(GetAllocation());
case EAnyRepresentation::Small:
GetTypeInfoImpl().DestroyImpl(GetAllocation());
break;
case NAMESPACE_PRIVATE::EAnyRepresentation::Big:
GetTypeInfo().Destroy(GetAllocation());
case EAnyRepresentation::Big:
GetTypeInfoImpl().DestroyImpl(GetAllocation());
Memory::Free(HeapAllocation);
break;
default: check_no_entry();
@ -361,14 +410,14 @@ private:
{
if (LHS.GetTypeInfo() != RHS.GetTypeInfo()) return false;
if (LHS.IsValid() == false) return true;
return LHS.GetTypeInfo().EqualityCompare(LHS.GetAllocation(), RHS.GetAllocation());
return LHS.GetTypeInfoImpl().EqualityCompareImpl(LHS.GetAllocation(), RHS.GetAllocation());
}
friend FORCEINLINE partial_ordering operator<=>(const TAny& LHS, const TAny& RHS)
{
if (LHS.GetTypeInfo() != RHS.GetTypeInfo()) return partial_ordering::unordered;
if (LHS.IsValid() == false) return partial_ordering::equivalent;
return LHS.GetTypeInfo().SynthThreeWayCompare(LHS.GetAllocation(), RHS.GetAllocation());;
return LHS.GetTypeInfoImpl().SynthThreeWayCompareImpl(LHS.GetAllocation(), RHS.GetAllocation());;
}
};