feat(typetraits): add TypeTraits/PrimaryType.h and the corresponding testing
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113
Redcraft.Utility/Source/Private/Testing/TypeTraitsTesting.cpp
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113
Redcraft.Utility/Source/Private/Testing/TypeTraitsTesting.cpp
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#include "Testing/TypeTraitsTesting.h"
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#include "Misc/AssertionMacros.h"
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#include "TypeTraits/HelperClasses.h"
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#include "TypeTraits/PrimaryType.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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// Warning: The test here is not a complete test, it is only used to determine whether the environment supports the traits
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int32 TestObject;
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void TestFunction() { }
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struct FTestStruct { };
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enum ETestEnum { };
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enum class ETestEnumClass { };
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union FTestUnion { };
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void TestTypeTraits()
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{
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// HelperClasses.h
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always_check(TypeTraits::TIntegralConstant<1>::Value == 1);
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always_check(static_cast<int32>(TypeTraits::TIntegralConstant<2>::Value) == 2);
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always_check(TypeTraits::TIntegralConstant<3>() == 3);
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always_check(!TypeTraits::FFalse::Value);
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always_check(TypeTraits::FTrue::Value);
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always_check(TypeTraits::TAnd<TypeTraits::FTrue>::Value);
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always_check(!TypeTraits::TAnd<TypeTraits::FFalse>::Value);
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always_check((TypeTraits::TAnd<TypeTraits::FTrue, TypeTraits::FTrue>::Value));
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always_check(!(TypeTraits::TAnd<TypeTraits::FFalse, TypeTraits::FTrue>::Value));
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always_check(!(TypeTraits::TAnd<TypeTraits::FTrue, TypeTraits::FFalse>::Value));
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always_check(!(TypeTraits::TAnd<TypeTraits::FFalse, TypeTraits::FFalse>::Value));
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always_check(TypeTraits::TOr<TypeTraits::FTrue>::Value);
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always_check(!TypeTraits::TOr<TypeTraits::FFalse>::Value);
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always_check((TypeTraits::TOr<TypeTraits::FTrue, TypeTraits::FTrue>::Value));
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always_check((TypeTraits::TOr<TypeTraits::FFalse, TypeTraits::FTrue>::Value));
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always_check((TypeTraits::TOr<TypeTraits::FTrue, TypeTraits::FFalse>::Value));
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always_check(!(TypeTraits::TOr<TypeTraits::FFalse, TypeTraits::FFalse>::Value));
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always_check(!TypeTraits::TNot<TypeTraits::FTrue>::Value);
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always_check(TypeTraits::TNot<TypeTraits::FFalse>::Value);
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// PrimaryType.h
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always_check(!TypeTraits::TIsVoid<int32>::Value);
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always_check(TypeTraits::TIsVoid<void>::Value);
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always_check(TypeTraits::TIsVoid<const void>::Value);
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always_check(TypeTraits::TIsVoid<const volatile void>::Value);
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always_check(TypeTraits::TIsVoid<volatile void>::Value);
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always_check(!TypeTraits::TIsNullPointer<int32>::Value);
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always_check(TypeTraits::TIsNullPointer<nullptr_t>::Value);
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always_check(TypeTraits::TIsIntegral<int32>::Value);
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always_check(!TypeTraits::TIsIntegral<float>::Value);
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always_check(!TypeTraits::TIsFloatingPoint<int32>::Value);
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always_check(TypeTraits::TIsFloatingPoint<float>::Value);
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always_check(!TypeTraits::TIsArray<int32>::Value);
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always_check(TypeTraits::TIsArray<int32[]>::Value);
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always_check(TypeTraits::TIsArray<int32[10]>::Value);
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always_check(!TypeTraits::TIsPointer<int32>::Value);
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always_check(TypeTraits::TIsPointer<int32*>::Value);
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always_check(!TypeTraits::TIsLValueReference<int32>::Value);
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always_check(TypeTraits::TIsLValueReference<int32&>::Value);
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always_check(!TypeTraits::TIsLValueReference<int32&&>::Value);
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always_check(!TypeTraits::TIsRValueReference<int32>::Value);
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always_check(!TypeTraits::TIsRValueReference<int32&>::Value);
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always_check(TypeTraits::TIsRValueReference<int32&&>::Value);
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always_check(TypeTraits::TIsMemberObjectPointer<int32(FTestStruct::*)>::Value);
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always_check(!TypeTraits::TIsMemberObjectPointer<int32(FTestStruct::*)()>::Value);
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always_check(!TypeTraits::TIsMemberFunctionPointer<int32(FTestStruct::*)>::Value);
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always_check(TypeTraits::TIsMemberFunctionPointer<int32(FTestStruct::*)()>::Value);
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always_check(!TypeTraits::TIsEnum<int32>::Value);
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always_check(!TypeTraits::TIsEnum<FTestStruct>::Value);
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always_check(TypeTraits::TIsEnum<ETestEnum>::Value);
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always_check(TypeTraits::TIsEnum<ETestEnumClass>::Value);
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always_check(!TypeTraits::TIsUnion<int32>::Value);
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always_check(!TypeTraits::TIsUnion<FTestStruct>::Value);
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always_check(TypeTraits::TIsUnion<FTestUnion>::Value);
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always_check(!TypeTraits::TIsUnion<int32>::Value);
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always_check(!TypeTraits::TIsUnion<FTestStruct>::Value);
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always_check(TypeTraits::TIsUnion<FTestUnion>::Value);
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always_check(!TypeTraits::TIsFunction<int32>::Value);
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always_check(!TypeTraits::TIsFunction<FTestStruct>::Value);
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always_check(!TypeTraits::TIsFunction<FTestUnion>::Value);
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always_check(TypeTraits::TIsFunction<int32(int32)>::Value);
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always_check(!TypeTraits::TIsEnumClass<ETestEnum>::Value);
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always_check(TypeTraits::TIsEnumClass<ETestEnumClass>::Value);
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}
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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13
Redcraft.Utility/Source/Public/Testing/TypeTraitsTesting.h
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13
Redcraft.Utility/Source/Public/Testing/TypeTraitsTesting.h
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#pragma once
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#include "CoreTypes.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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void REDCRAFTUTILITY_API TestTypeTraits();
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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52
Redcraft.Utility/Source/Public/TypeTraits/HelperClasses.h
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52
Redcraft.Utility/Source/Public/TypeTraits/HelperClasses.h
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#pragma once
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#include "CoreTypes.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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NAMESPACE_BEGIN(TypeTraits)
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template <typename InType, InType InValue>
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struct TConstant
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{
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using Type = InType;
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static constexpr Type Value = InValue;
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constexpr operator Type() const { return Value; }
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constexpr Type operator()() const { return Value; }
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};
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template <bool InValue>
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using TBoolConstant = TConstant<bool, InValue>;
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template <int32 InValue>
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using TIntegralConstant = TConstant<int32, InValue>;
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using FTrue = TBoolConstant<true>;
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using FFalse = TBoolConstant<false>;
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template <typename... Types>
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struct TAnd;
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template <typename LHS, typename... RHS>
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struct TAnd<LHS, RHS...> : TBoolConstant<LHS::Value&& TAnd<RHS...>::Value> { };
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template <>
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struct TAnd<> : FTrue { };
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template <typename... Types>
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struct TOr;
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template <typename LHS, typename... RHS>
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struct TOr<LHS, RHS...> : TBoolConstant<LHS::Value || TOr<RHS...>::Value> { };
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template <>
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struct TOr<> : FFalse { };
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template <typename Type>
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struct TNot : TBoolConstant<!Type::Value> { };
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NAMESPACE_END(TypeTraits)
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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44
Redcraft.Utility/Source/Public/TypeTraits/PrimaryType.h
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44
Redcraft.Utility/Source/Public/TypeTraits/PrimaryType.h
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#pragma once
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#include "CoreTypes.h"
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#include "TypeTraits/HelperClasses.h"
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#include <type_traits>
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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NAMESPACE_BEGIN(TypeTraits)
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template <typename T> struct TIsVoid : TBoolConstant<NAMESPACE_STD::is_void_v<T>> { };
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template <typename T> struct TIsNullPointer : TBoolConstant<NAMESPACE_STD::is_null_pointer_v<T>> { };
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template <typename T> struct TIsIntegral : TBoolConstant<NAMESPACE_STD::is_integral_v<T>> { };
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template <typename T> struct TIsFloatingPoint : TBoolConstant<NAMESPACE_STD::is_floating_point_v<T>> { };
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template <typename T> struct TIsArray : TBoolConstant<NAMESPACE_STD::is_array_v<T>> { };
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template <typename T> struct TIsPointer : TBoolConstant<NAMESPACE_STD::is_pointer_v<T>> { };
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template <typename T> struct TIsLValueReference : TBoolConstant<NAMESPACE_STD::is_lvalue_reference_v<T>> { };
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template <typename T> struct TIsRValueReference : TBoolConstant<NAMESPACE_STD::is_rvalue_reference_v<T>> { };
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template <typename T> struct TIsMemberObjectPointer : TBoolConstant<NAMESPACE_STD::is_member_object_pointer_v<T>> { };
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template <typename T> struct TIsMemberFunctionPointer : TBoolConstant<NAMESPACE_STD::is_member_function_pointer_v<T>> { };
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template <typename T> struct TIsEnum : TBoolConstant<NAMESPACE_STD::is_enum_v<T>> { };
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template <typename T> struct TIsUnion : TBoolConstant<NAMESPACE_STD::is_union_v<T>> { };
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template <typename T> struct TIsClass : TBoolConstant<NAMESPACE_STD::is_class_v<T>> { };
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template <typename T> struct TIsFunction : TBoolConstant<NAMESPACE_STD::is_function_v<T>> { };
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NAMESPACE_PRIVATE_BEGIN
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static char(&Resolve(int))[2];
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static char Resolve(...);
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template <typename T>
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struct TIsEnumConvertibleToInt : TBoolConstant<sizeof(Resolve(T())) - 1> { };
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NAMESPACE_PRIVATE_END
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template <typename T>
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struct TIsEnumClass : TBoolConstant<TAnd<TIsEnum<T>, TNot<NAMESPACE_PRIVATE::TIsEnumConvertibleToInt<T>>>::Value> { };
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NAMESPACE_END(TypeTraits)
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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