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feat(templates): add CAnyCustomStorage for TAny

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This commit is contained in:
_Redstone_c_ 2022-11-14 21:05:53 +08:00
parent 9ff3b1c583
commit 8464a33fcc
2 changed files with 29 additions and 13 deletions
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35
Redcraft.Utility/Source/Public/Templates/Any.h
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@ -15,7 +15,26 @@ NAMESPACE_MODULE_BEGIN(Utility)
// TAny's CustomStorage concept, see FAnyDefaultStorage.
template <typename T>
concept CAnyStorage = true; // TODO
concept CAnyCustomStorage =
// CSameAs<decltype(T::InlineSize), const size_t> &&
// CSameAs<decltype(T::InlineAlignment), const size_t> &&
requires(const T& A)
{
{ A.InlineAllocation() } -> CSameAs<const void*>;
{ A.HeapAllocation() } -> CSameAs<void*>;
{ A.TypeInfo() } -> CSameAs<uintptr>;
} &&
requires(T& A)
{
{ A.InlineAllocation() } -> CSameAs<void*>;
{ A.HeapAllocation() } -> CSameAs<void*&>;
{ A.TypeInfo() } -> CSameAs<uintptr&>;
} &&
requires(T& A, const T& B, T&& C)
{
A.CopyCustom(B);
A.MoveCustom(MoveTemp(C));
};
// TAny's default storage structure.
struct alignas(16) FAnyDefaultStorage
@ -25,7 +44,7 @@ struct alignas(16) FAnyDefaultStorage
// You can add custom variables like this.
//Type Variable;
//~ Begin CAnyStorage Interface
//~ Begin CAnyCustomStorage Interface
inline static constexpr size_t InlineSize = 64 - sizeof(uintptr);
inline static constexpr size_t InlineAlignment = 16;
constexpr void* InlineAllocation() { return &InlineAllocationImpl; }
@ -36,7 +55,7 @@ struct alignas(16) FAnyDefaultStorage
constexpr uintptr TypeInfo() const { return TypeInfoImpl; }
constexpr void CopyCustom(const FAnyDefaultStorage& InValue) { /* Variable = InValue.Variable; */ } // You just need to copy the custom variables.
constexpr void MoveCustom( FAnyDefaultStorage&& InValue) { /* Variable = MoveTemp(InValue.Variable); */ } // You just need to move the custom variables.
//~ End CAnyStorage Interface
//~ End CAnyCustomStorage Interface
union
{
@ -48,11 +67,11 @@ struct alignas(16) FAnyDefaultStorage
};
static_assert(CAnyStorage<FAnyDefaultStorage>);
static_assert(CAnyCustomStorage<FAnyDefaultStorage>);
// You can add custom storage area through CustomStorage, such as TFunction.
// It is not recommended to use this, FAny is recommended.
template <CAnyStorage CustomStorage = FAnyDefaultStorage>
template <CAnyCustomStorage CustomStorage = FAnyDefaultStorage>
struct TAny
{
inline static constexpr size_t InlineSize = CustomStorage::InlineSize;
@ -460,13 +479,13 @@ private:
};
template <typename T, CAnyStorage StorageType>
template <typename T, CAnyCustomStorage StorageType>
constexpr bool operator==(const TAny<StorageType>& LHS, const T& RHS)
{
return LHS.template HoldsAlternative<T>() ? LHS.template GetValue<T>() == RHS : false;
}
template <CAnyStorage StorageType>
template <CAnyCustomStorage StorageType>
constexpr bool operator==(const TAny<StorageType>& LHS, FInvalid)
{
return !LHS.IsValid();
@ -475,7 +494,7 @@ constexpr bool operator==(const TAny<StorageType>& LHS, FInvalid)
NAMESPACE_PRIVATE_BEGIN
template <typename T> struct TIsTAny : FFalse { };
template <CAnyStorage StorageType> struct TIsTAny<TAny<StorageType>> : FTrue { };
template <CAnyCustomStorage StorageType> struct TIsTAny<TAny<StorageType>> : FTrue { };
NAMESPACE_PRIVATE_END

7
Redcraft.Utility/Source/Public/Templates/Function.h
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@ -83,7 +83,7 @@ template <typename Ret, typename... Types> struct TFunctionInfo<Ret(Types...) co
template <typename CallableType>
struct alignas(16) FFunctionStorage
{
//~ Begin CAnyStorage Interface
//~ Begin CAnyCustomStorage Interface
inline static constexpr size_t InlineSize = 64 - sizeof(uintptr) - sizeof(CallableType);
inline static constexpr size_t InlineAlignment = 16;
constexpr void* InlineAllocation() { return &InlineAllocationImpl; }
@ -94,7 +94,7 @@ struct alignas(16) FFunctionStorage
constexpr uintptr TypeInfo() const { return TypeInfoImpl; }
constexpr void CopyCustom(const FFunctionStorage& InValue) { Callable = InValue.Callable; }
constexpr void MoveCustom( FFunctionStorage&& InValue) { Callable = InValue.Callable; }
//~ End CAnyStorage Interface
//~ End CAnyCustomStorage Interface
union
{
@ -106,9 +106,6 @@ struct alignas(16) FFunctionStorage
CallableType Callable;
template <CAnyStorage T>
friend struct TAny;
};
template <typename F, typename CVRef, bool bIsRef> struct TFunctionImpl;