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feat(templates): add initializer_list overloads to the in place constructor and emplace

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This commit is contained in:
_Redstone_c_
2022-12-31 19:19:30 +08:00
parent 5338cd286a
commit 0709f209c8
5 changed files with 219 additions and 28 deletions
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26
Redcraft.Utility/Source/Public/Templates/Any.h
View File

@ -106,6 +106,13 @@ public:
{
EmplaceImpl<T>(Forward<Ts>(Args)...);
}
/** Constructs an object with initial content an object of type TDecay<T>, direct-non-list-initialized from IL, Forward<Ts>(Args).... */
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::CFAnyPlaceable<T> && CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts&&...>)
FORCEINLINE explicit FAny(TInPlaceType<T>, initializer_list<U> IL, Ts&&... Args)
{
EmplaceImpl<T>(IL, Forward<Ts>(Args)...);
}
/** Destroys the contained object, if any, as if by a call to Reset(). */
FORCEINLINE ~FAny()
@ -275,7 +282,7 @@ public:
* First destroys the current contained object (if any) by Reset(), then constructs an object of type
* TDecay<T>, direct-non-list-initialized from Forward<Ts>(Args)..., as the contained object.
*
* @param Args - The arguments to be passed to the constructor of the contained object.
* @param Args - The arguments to be passed to the constructor of the contained object.
*
* @return A reference to the new contained object.
*/
@ -287,6 +294,23 @@ public:
return GetValue<TDecay<T>>();
}
/**
* Changes the contained object to one of type TDecay<T> constructed from the arguments.
* First destroys the current contained object (if any) by Reset(), then constructs an object of type
* TDecay<T>, direct-non-list-initialized from IL, Forward<Ts>(Args)..., as the contained object.
*
* @param IL, Args - The arguments to be passed to the constructor of the contained object.
*
* @return A reference to the new contained object.
*/
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::CFAnyPlaceable<T> && CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts&&...>)
FORCEINLINE TDecay<T>& Emplace(initializer_list<U> IL, Ts&&... Args)
{
Destroy();
EmplaceImpl<T>(IL, Forward<Ts>(Args)...);
return GetValue<TDecay<T>>();
}
/** @return The typeid of the contained value if instance is non-empty, otherwise typeid(void). */
NODISCARD FORCEINLINE constexpr const type_info& GetTypeInfo() const { return IsValid() ? GetTypeInfoImpl() : typeid(void); }

99
Redcraft.Utility/Source/Public/Templates/Function.h
View File

@ -506,8 +506,8 @@ protected:
FORCEINLINE constexpr void Invalidate() { Storage.Invalidate(); }
// Make sure you call this function after you have destroyed the held object using Destroy().
template <typename T, typename... ArgTypes>
FORCEINLINE constexpr TDecay<T>& Emplace(ArgTypes&&... Args)
template <typename T, typename... Us>
FORCEINLINE constexpr TDecay<T>& Emplace(Us&&... Args)
{
using DecayedType = TDecay<T>;
@ -525,7 +525,7 @@ protected:
Storage.template Emplace<DecayedType>(
reinterpret_cast<uintptr>(Callable),
Forward<ArgTypes>(Args)...
Forward<Us>(Args)...
);
return *reinterpret_cast<DecayedType*>(Storage.GetValuePtr());
@ -641,12 +641,24 @@ public:
* Constructs an TFunction with initial content an function object of type TDecay<T>,
* direct-non-list-initialized from Forward<Ts>(Args)....
*/
template <typename T, typename... ArgTypes> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, ArgTypes...> && CCopyConstructible<TDecay<T>>
template <typename T, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, Ts...> && CCopyConstructible<TDecay<T>>
&& CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE explicit TFunction(TInPlaceType<T>, ArgTypes&&... Args)
FORCEINLINE explicit TFunction(TInPlaceType<T>, Ts&&... Args)
{
Impl::template Emplace<T>(Forward<ArgTypes>(Args)...);
Impl::template Emplace<T>(Forward<Ts>(Args)...);
}
/**
* Constructs an TFunction with initial content an function object of type TDecay<T>,
* direct-non-list-initialized from IL, Forward<Ts>(Args)....
*/
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts...> && CCopyConstructible<TDecay<T>>
&& CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE explicit TFunction(TInPlaceType<T>, initializer_list<U> IL, Ts&&... Args)
{
Impl::template Emplace<T>(IL, Forward<Ts>(Args)...);
}
/** Removes any bound callable from the TFunction, restoring it to the default empty state. */
@ -670,17 +682,35 @@ public:
* First destroys the current function object (if any) by Reset(), then constructs an object of type
* TDecay<T>, direct-non-list-initialized from Forward<Ts>(Args)..., as the function object.
*
* @param Args - The arguments to be passed to the constructor of the function object.
* @param Args - The arguments to be passed to the constructor of the function object.
*
* @return A reference to the new function object.
*/
template <typename T, typename... ArgTypes> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, ArgTypes...> && CCopyConstructible<TDecay<T>>
template <typename T, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, Ts...> && CCopyConstructible<TDecay<T>>
&& CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE TDecay<T>& Emplace(ArgTypes&&... Args)
FORCEINLINE TDecay<T>& Emplace(Ts&&... Args)
{
Impl::Destroy();
return Impl::template Emplace<T>(Forward<ArgTypes>(Args)...);
return Impl::template Emplace<T>(Forward<Ts>(Args)...);
}
/**
* Changes the function object to one of type TDecay<T> constructed from the arguments.
* First destroys the current function object (if any) by Reset(), then constructs an object of type
* TDecay<T>, direct-non-list-initialized from IL, Forward<Ts>(Args)..., as the function object.
*
* @param IL, Args - The arguments to be passed to the constructor of the function object.
*
* @return A reference to the new function object.
*/
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts...> && CCopyConstructible<TDecay<T>>
&& CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE TDecay<T>& Emplace(initializer_list<U> IL, Ts&&... Args)
{
Impl::Destroy();
return Impl::template Emplace<T>(IL, Forward<Ts>(Args)...);
}
/** Removes any bound callable from the TFunction, restoring it to the default empty state. */
@ -765,11 +795,22 @@ public:
* Constructs an TUniqueFunction with initial content an function object of type TDecay<T>,
* direct-non-list-initialized from Forward<Ts>(Args)....
*/
template <typename T, typename... ArgTypes> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, ArgTypes...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE explicit TUniqueFunction(TInPlaceType<T>, ArgTypes&&... Args)
template <typename T, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, Ts...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE explicit TUniqueFunction(TInPlaceType<T>, Ts&&... Args)
{
Impl::template Emplace<T>(Forward<ArgTypes>(Args)...);
Impl::template Emplace<T>(Forward<Ts>(Args)...);
}
/**
* Constructs an TUniqueFunction with initial content an function object of type TDecay<T>,
* direct-non-list-initialized from IL, Forward<Ts>(Args)....
*/
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE explicit TUniqueFunction(TInPlaceType<T>, initializer_list<U> IL, Ts&&... Args)
{
Impl::template Emplace<T>(IL, Forward<Ts>(Args)...);
}
/** Removes any bound callable from the TUniqueFunction, restoring it to the default empty state. */
@ -795,13 +836,31 @@ public:
*
* @return A reference to the new function object.
*/
template <typename T, typename... ArgTypes> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, ArgTypes...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE TDecay<T>& Emplace(ArgTypes&&... Args)
template <typename T, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, Ts...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE TDecay<T>& Emplace(Ts&&... Args)
{
Impl::Destroy();
using DecayedType = TDecay<T>;
return Impl::template Emplace<T>(Forward<ArgTypes>(Args)...);
return Impl::template Emplace<T>(Forward<Ts>(Args)...);
}
/**
* Changes the function object to one of type TDecay<T> constructed from the arguments.
* First destroys the current function object (if any) by Reset(), then constructs an object of type
* TDecay<T>, direct-non-list-initialized from IL, Forward<Ts>(Args)..., as the function object.
*
* @param IL, Args - The arguments to be passed to the constructor of the function object.
*
* @return A reference to the new function object.
*/
template <typename T, typename U, typename... Ts> requires (NAMESPACE_PRIVATE::TIsInvocableSignature<F, TDecay<T>>::Value
&& CConstructibleFrom<TDecay<T>, initializer_list<U>, Ts...> && CMoveConstructible<TDecay<T>> && CDestructible<TDecay<T>>)
FORCEINLINE TDecay<T>& Emplace(initializer_list<U> IL, Ts&&... Args)
{
Impl::Destroy();
using DecayedType = TDecay<T>;
return Impl::template Emplace<T>(IL, Forward<Ts>(Args)...);
}
/** Removes any bound callable from the TUniqueFunction, restoring it to the default empty state. */

36
Redcraft.Utility/Source/Public/Templates/Optional.h
View File

@ -66,6 +66,14 @@ public:
{
new (&Value) OptionalType(Forward<Ts>(Args)...);
}
/** Constructs an object with initial content an object, direct-non-list-initialized from IL, Forward<Ts>(Args).... */
template <typename U, typename... Ts> requires (CConstructibleFrom<OptionalType, initializer_list<U>, Ts...>)
FORCEINLINE constexpr explicit TOptional(FInPlace, initializer_list<U> IL, Ts&&... Args)
: bIsValid(true)
{
new (&Value) OptionalType(IL, Forward<Ts>(Args)...);
}
/** Copies content of other into a new instance. */
FORCEINLINE constexpr TOptional(const TOptional& InValue) requires (CTriviallyCopyConstructible<OptionalType>) = default;
@ -258,16 +266,36 @@ public:
* First destroys the current contained object (if any) by Reset(),
* then constructs an object, direct-non-list-initialized from Forward<Ts>(Args)..., as the contained object.
*
* @param Args - The arguments to be passed to the constructor of the object.
* @param Args - The arguments to be passed to the constructor of the object.
*
* @return A reference to the new object.
*/
template <typename... ArgTypes> requires (CConstructibleFrom<OptionalType, ArgTypes...>)
FORCEINLINE constexpr OptionalType& Emplace(ArgTypes&&... Args)
template <typename... Ts> requires (CConstructibleFrom<OptionalType, Ts...>)
FORCEINLINE constexpr OptionalType& Emplace(Ts&&... Args)
{
Reset();
OptionalType* Result = new (&Value) OptionalType(Forward<ArgTypes>(Args)...);
OptionalType* Result = new (&Value) OptionalType(Forward<Ts>(Args)...);
bIsValid = true;
return *Result;
}
/**
* Changes the contained object to one constructed from the arguments.
* First destroys the current contained object (if any) by Reset(),
* then constructs an object, direct-non-list-initialized from IL, Forward<Ts>(Args)..., as the contained object.
*
* @param IL, Args - The arguments to be passed to the constructor of the object.
*
* @return A reference to the new object.
*/
template <typename U, typename... Ts> requires (CConstructibleFrom<OptionalType, initializer_list<U>, Ts...>)
FORCEINLINE constexpr OptionalType& Emplace(initializer_list<U> IL, Ts&&... Args)
{
Reset();
OptionalType* Result = new (&Value) OptionalType(IL, Forward<Ts>(Args)...);
bIsValid = true;
return *Result;

46
Redcraft.Utility/Source/Public/Templates/Variant.h
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@ -142,6 +142,22 @@ public:
using SelectedType = TVariantAlternative<I, TVariant<Ts...>>;
new (&Value) SelectedType(Forward<Us>(Args)...);
}
/** Constructs a variant with the specified alternative T and initializes the contained value with the arguments IL, Forward<Us>(Args).... */
template <typename T, typename U, typename... Us> requires (CConstructibleFrom<T, initializer_list<U>, Us...>)
FORCEINLINE constexpr explicit TVariant(TInPlaceType<T>, initializer_list<U> IL, Us&&... Args)
: TVariant(InPlaceIndex<TVariantIndex<T, TVariant<Ts...>>>, IL, Forward<Us>(Args)...)
{ }
/** Constructs a variant with the alternative T specified by the index I and initializes the contained value with the arguments IL, Forward<Us>(Args).... */
template <size_t I, typename T, typename... Us> requires (I < sizeof...(Ts)
&& CConstructibleFrom<TVariantAlternative<I, TVariant<Ts...>>, initializer_list<T>, Us...>)
FORCEINLINE constexpr explicit TVariant(TInPlaceIndex<I>, initializer_list<T> IL, Us&&... Args)
: TypeIndex(I)
{
using SelectedType = TVariantAlternative<I, TVariant<Ts...>>;
new (&Value) SelectedType(IL, Forward<Us>(Args)...);
}
/** Destroys the contained object, if any, as if by a call to Reset(). */
FORCEINLINE constexpr ~TVariant() requires (true && ... && CTriviallyDestructible<Ts>) = default;
@ -273,7 +289,7 @@ public:
* First, destroys the currently contained value if any.
* Then direct-initializes the contained value as if constructing a value of type T with the arguments Forward<Us>(Args)....
*
* @param Args - The arguments to be passed to the constructor of the contained object.
* @param Args - The arguments to be passed to the constructor of the contained object.
*
* @return A reference to the new contained object.
*/
@ -289,6 +305,34 @@ public:
return *Result;
}
/** Equivalent to Emplace<I>(IL, Forward<Us>(Args)...), where I is the zero-based index of T in Types.... */
template <typename T, typename U, typename... Us> requires (CConstructibleFrom<T, initializer_list<U>, Us...>)
FORCEINLINE constexpr T& Emplace(initializer_list<U> IL, Us&&... Args)
{
return Emplace<TVariantIndex<T, TVariant<Ts...>>>(IL, Forward<Us>(Args)...);
}
/**
* First, destroys the currently contained value if any.
* Then direct-initializes the contained value as if constructing a value of type T with the arguments IL, Forward<Us>(Args)....
*
* @param IL, Args - The arguments to be passed to the constructor of the contained object.
*
* @return A reference to the new contained object.
*/
template <size_t I, typename T, typename... Us> requires (I < sizeof...(Ts)
&& CConstructibleFrom<TVariantAlternative<I, TVariant<Ts...>>, initializer_list<T>, Us...>)
FORCEINLINE constexpr TVariantAlternative<I, TVariant<Ts...>>& Emplace(initializer_list<T> IL, Us&&... Args)
{
Reset();
using SelectedType = TVariantAlternative<I, TVariant<Ts...>>;
SelectedType* Result = new (&Value) SelectedType(IL, Forward<Us>(Args)...);
TypeIndex = I;
return *Result;
}
/** @return The typeid of the contained value if instance is non-empty, otherwise typeid(void). */
NODISCARD FORCEINLINE constexpr const type_info& GetTypeInfo() const { return IsValid() ? *TypeInfos[GetIndex()] : typeid(void); }