Core/Flags: Allow explicit operator conversion to any integer type of the same size (or greater size) than the internal size

ChangeLog.md

@@ -17,7 +17,10 @@ Nazara Engine:
 - Fix BoundingVolume::Lerp() with Extend_Null
 - Simplification of methods Matrix4::SetRotation() and Quaternion::MakeRotationBetween()
 - Fix mouve moved event generated on X11 platform when doing Mouse::SetPosition()
-- ⚠️ Reworked Flags class, replaced EnumAsFlags<E>::value by IsEnumFlag<E>::value, EnumAsFlags<E> no longer need to contains a `value` field. The `max` field can also be of the same type as the enum.
+- EnumAsFlags specialization no longer require a `value` field to enable flags operators
+- EnumAsFlags specialization `max` field can be of the same type as the enum
+- Flags class now use an UInt8 or UInt16 to store the value if possible.
+- Flags class is now explicitly convertible to any integer type of the same size (or greater size) than the internal size.
 - Fix String movement constructor, which was leaving a null shared string (which was not reusable)
 
 Nazara Development Kit:

include/Nazara/Core/Flags.hpp

@@ -39,17 +39,17 @@ namespace Nz
 
 		static constexpr std::size_t MaxValue = static_cast<std::size_t>(EnumAsFlags<E>::max);
 
-		using BitField16 = typename std::conditional<(MaxValue > 8), UInt16, UInt8>::type;
+		using BitField16 = std::conditional_t<(MaxValue > 8), UInt16, UInt8>;
-		using BitField32 = typename std::conditional<(MaxValue > 16), UInt32, BitField16>::type;
+		using BitField32 = std::conditional_t<(MaxValue > 16), UInt32, BitField16>;
 
 		public:
-			using BitField = typename std::conditional<(MaxValue > 32), UInt64, BitField32>::type;
+			using BitField = std::conditional_t<(MaxValue > 32), UInt64, BitField32>;
 
 			constexpr Flags(BitField value = 0);
 			constexpr Flags(E enumVal);
 
 			explicit constexpr operator bool() const;
-			explicit constexpr operator BitField() const;
+			template<typename T, typename = std::enable_if_t<std::is_integral<T>::value && sizeof(T) >= sizeof(BitField)>> explicit constexpr operator T() const;
 
 			constexpr Flags operator~() const;
 			constexpr Flags operator&(const Flags& rhs) const;

include/Nazara/Core/Flags.inl

@@ -52,13 +52,14 @@ namespace Nz
 	}
 
 	/*!
-	* \brief Converts to a bitfield
+	* \brief Converts to an integer
-	* \return Enabled flags as a bitfield.
+	* \return Enabled flags as a integer
 	*
-	* This will convert to a bitfield value.
+	* This will only works if the integer type is large enough to store all flags states
 	*/
 	template<typename E>
-	constexpr Flags<E>::operator BitField() const
+	template<typename T, typename>
+	constexpr Flags<E>::operator T() const
 	{
 		return m_value;
 	}