- fennec::variant & fennec::generic, TODO: Test

CMakeLists.txt

@@ -113,6 +113,7 @@ add_library(fennec STATIC
         include/fennec/containers/bitfield.h
         include/fennec/containers/deque.h
         include/fennec/containers/dynarray.h
+        include/fennec/containers/generic.h
         include/fennec/containers/graph.h
         include/fennec/containers/initializer_list.h
         include/fennec/containers/list.h
@@ -176,6 +177,8 @@ add_library(fennec STATIC
         include/fennec/rtti/enable.h
         include/fennec/rtti/forward.h
         include/fennec/rtti/typelist.h
+        include/fennec/rtti/type_registry.h
+        include/fennec/rtti/singleton.h
 
 
         include/fennec/rtti/detail/_constants.h

cmake/gcc.cmake

@@ -27,5 +27,4 @@ fennec_add_definitions(
         FENNEC_COMPILER_GCC=1
         FENNEC_NO_INLINE=[[gnu::noinline]]
         FENNEC_FUNCTION_NAME=__PRETTY_FUNCTION__
-        RYU_ONLY_64_BIT_OPS
 )

include/fennec/containers/generic.h

@@ -0,0 +1,210 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+///
+/// \file universal.h
+/// \brief
+///
+///
+/// \details
+/// \author Medusa Slockbower
+///
+/// \copyright Copyright © 2025 Medusa Slockbower ([GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html))
+///
+///
+
+#ifndef FENNEC_CONTAINERS_GENERIC_H
+#define FENNEC_CONTAINERS_GENERIC_H
+
+#include <fennec/memory/allocator.h>
+#include <fennec/rtti/type.h>
+
+namespace fennec
+{
+
+///
+/// \brief A struct capable of holding a single object of any type
+struct generic {
+
+// Definitions =========================================================================================================
+private:
+
+	// based on GCC
+	enum op_ : uint8_t {
+		op_clone,
+		op_destroy,
+		op_type,
+	};
+
+	using manager_t = void* (*)(uint8_t, void*);
+
+
+// Constructors ========================================================================================================
+public:
+
+	///
+	/// \brief Default Constructor
+	generic()
+		: _handle(nullptr)
+		, _manage(nullptr) {
+	}
+
+	///
+	/// \brief Copy Constructor
+	/// \param gen The generic object to copy
+	generic(const generic& gen)
+		: _handle(nullptr)
+		, _manage(gen._manage) {
+		if (_manage) {
+			_handle = _manage(op_clone, gen._handle);
+		}
+	}
+
+	///
+	/// \brief Move Constructor
+	/// \param gen The generic object to move
+	generic(generic&& gen)
+		: _handle(gen._handle)
+		, _manage(gen._manage) {
+		gen._handle = nullptr;
+		gen._manage = nullptr;
+	}
+
+	///
+	/// \brief Value Constructor
+	/// \tparam T The type of the value
+	/// \param x The value
+	template<typename T>
+	generic(T&& x)
+		: _handle(new T(fennec::forward<T>(x)))
+		, _manage(_manage_impl<T>) {
+	}
+
+	///
+	/// \brief Emplace Constructor
+	/// \tparam T The type to construct
+	/// \tparam ArgsT The argument types
+	/// \param args The argument values
+	template<typename T, typename...ArgsT>
+	generic(type_identity<T>, ArgsT&&...args)
+		: _handle(new T(fennec::forward<ArgsT>(args)...))
+		, _manage(_manage_impl<T>) {
+	}
+
+	///
+	/// \brief Destructor
+	~generic() {
+		reset();
+	}
+
+
+// Properties ==========================================================================================================
+
+	type type() const {
+		return *static_cast<fennec::type*>(_manage(op_type, nullptr));
+	}
+
+	bool has_value() const {
+		return _handle != nullptr;
+	}
+
+
+// Assignment ==========================================================================================================
+
+	generic& operator=(const generic& gen) {
+		if (this == &gen) { // self-assignment case
+			return *this;
+		}
+
+		reset();
+		_manage = gen._manage;
+		_handle = _manage(op_clone, gen._handle);
+		return *this;
+	}
+
+	generic& operator=(generic&& gen) noexcept {
+		swap(gen);
+		return *this;
+	}
+
+
+// Utility =============================================================================================================
+
+	template<typename T>
+	generic& operator=(T&& x) {
+		reset();
+		_handle = new T(fennec::forward<T>(x));
+		_manage = _manage_impl<T>();
+		return *this;
+	}
+
+	template<typename T, typename...ArgsT>
+	void emplace(ArgsT&&...args) {
+		reset();
+		_handle = new T(fennec::forward<ArgsT>(args)...);
+		_manage = _manage_impl<T>;
+	}
+
+	void reset() {
+		if (_manage) {
+			_handle = _manage(op_destroy, _handle);
+			_manage = nullptr;
+		}
+	}
+
+	void swap(generic& gen) noexcept {
+		fennec::swap(_handle, gen._handle);
+		fennec::swap(_manage, gen._manage);
+	}
+
+	template<typename T>
+	T& cast() {
+		return *static_cast<T*>(_handle);
+	}
+
+	template<typename T>
+	const T& cast() const {
+		return *static_cast<T*>(_handle);
+	}
+
+private:
+	void*     _handle;
+	manager_t _manage;
+
+	template<typename T>
+	static void* _manage_impl(uint8_t op, void* hnd) {
+		static fennec::type t = type::get<T>();
+		T* ptr = hnd;
+
+		switch (op) {
+			case op_clone:
+				return new T(*ptr);
+			case op_destroy:
+				delete ptr;
+				return nullptr;
+			case op_type:
+				return &t;
+			default:
+				return nullptr;
+		}
+	}
+};
+
+}
+
+#endif // FENNEC_CONTAINERS_GENERIC_H

include/fennec/containers/variant.h

@@ -31,4 +31,216 @@
 #ifndef FENNEC_CONTAINERS_VARIANT_H
 #define FENNEC_CONTAINERS_VARIANT_H
 
+#include <fennec/containers/optional.h>
+#include <fennec/lang/type_sequences.h>
+#include <fennec/math/ext/common.h>
+#include <fennec/rtti/type.h>
+
+namespace fennec
+{
+
+///
+/// \brief A structure that represents a union between `TypesT...`
+/// \tparam TypesT The types to hold in the variant
+template<typename...TypesT>
+struct variant {
+// Assertions ==========================================================================================================
+
+	static_assert(
+		     is_unique_v<TypesT...>         and // No two types in TypesT... may be equivalent
+		not (is_reference_v<TypesT> or ...) and // No type in TypesT... may be a reference
+		not (is_array_v<TypesT> or ...)     and // No type in TypesT... may be an array
+		not (is_void_v<TypesT> or ...)          // No type in TypesT... may be void
+	);
+
+
+// Typedefs & Constants ================================================================================================
+
+	static constexpr size_t size = max_element_size_v<TypesT...>;
+	static constexpr size_t nulltype = sizeof...(TypesT);
+
+
+
+
+// Constructors ========================================================================================================
+
+	///
+	/// \brief Default Constructor, constructs the first type in `TypesT...` that is default constructible
+	variant()
+		: _bytes {}
+		, _type(nulltype) {
+		using construct_t = search_element_t<is_default_constructible, TypesT...>;
+		fennec::construct<construct_t>(_handle);
+	}
+
+	///
+	/// \brief Conversion Constructor, constructs the type in `TypesT...` that is identical to `T`
+	///        or the first that is constructible with `T`
+	/// \tparam T The type of the value
+	/// \param t The value to forward
+	template<typename T>
+	variant(T&& t)
+		: _bytes {}
+		, _type() {
+		using same_t = search_element_args<is_same, type_sequence<T>, TypesT...>;
+		using convert_t = search_element_args<is_constructible, type_sequence<T>, TypesT...>;
+		using construct_t = conditional_t<is_void_v<same_t>, convert_t, convert_t>;
+		fennec::construct<construct_t>(_handle, fennec::forward<T>(t));
+	}
+
+	///
+	/// \brief Emplace Constructor, constructs the first type in `TypesT...` that is constructible with `ArgsT...`
+	/// \tparam ArgsT The arguments of the constructor
+	/// \param args The argument values
+	template<typename T, typename...ArgsT>
+	variant(type_identity<T>, ArgsT&&...args)
+		: _bytes{}
+		, _type(nulltype) {
+		static_assert(contains_element_v<T, TypesT...>, "T must be in TypesT...");
+		fennec::construct<T>(_handle, fennec::forward<ArgsT>(args)...);
+		_type = find_element_v<T>;
+	}
+
+	///
+	/// \brief Copy Constructor
+	/// \param v The variant to copy
+	variant(const variant& v)
+		: _bytes {}
+		, _type(nulltype) {
+
+		if (v._type == nulltype) {
+			return;
+		}
+
+		((v._type == find_element_v<TypesT, TypesT...> ?
+			fennec::construct<TypesT>(_handle, v.get<TypesT>()) :
+			(0)
+		), ...);
+		_type = v._type;
+	}
+
+	///
+	/// \brief Move Constructor
+	/// \param v The variant to move
+	variant(variant&& v) noexcept
+		: _bytes {}
+		, _type() {
+
+		if (v._type == nulltype) {
+			return;
+		}
+
+		((v._type == find_element_v<TypesT, TypesT...> ?
+			fennec::construct<TypesT>(_handle, fennec::move(v.get<TypesT>())) :
+			(0)
+		), ...);
+		_type = v._type;
+	}
+
+	///
+	/// \brief Destructor, if a type is held, destruct it.
+	~variant() {
+		_clear();
+	}
+
+
+// Assignment ==========================================================================================================
+
+	template<typename T>
+	variant& operator=(T&& t) {
+
+		// First, check if `T` is in `TypesT...`
+		if constexpr((contains_element_v<T, TypesT> or ...)) {
+			using type_t = remove_reference_t<T>;
+			if (_type == find_element_v<type_t, TypesT...>) {
+				*static_cast<type_t*>(_handle) = fennec::forward<T>(t);
+			} else {
+				_clear();
+				fennec::construct<type_t>(_handle, fennec::forward<T>(t));
+				_type = find_element_v<type_t, TypesT...>;
+			}
+			return *this;
+		}
+
+		// Next, try to assign using the currently held type
+		bool assigned = false;
+		if (_type != nulltype) {
+			((_type == find_element_v<TypesT, TypesT...> ?
+				(*static_cast<TypesT*>(_handle) = fennec::forward<T>(t), assigned = true) :
+				(0)
+			), ...);
+		}
+
+		if (assigned) {
+			return *this;
+		}
+
+		// Otherwise, destruct, then construct
+		_clear();
+		using construct_t = search_element_args<is_constructible, type_sequence<T>, TypesT...>;
+		fennec::construct<construct_t>(_handle, fennec::forward<T>(t));
+		return *this;
+	}
+
+	template<typename T, typename...ArgsT> requires(contains_element_v<T, TypesT...>)
+	void emplace(ArgsT&&...args) {
+		_clear();
+		fennec::construct<T>(_handle, fennec::forward<ArgsT>(args)...);
+	}
+
+	template<size_t I, typename...ArgsT>
+	void emplace(ArgsT&&...args) {
+		using type_t = nth_element_t<I, TypesT...>;
+		_clear();
+		fennec::construct<type_t>(fennec::forward<ArgsT>(args)...);
+	}
+
+
+// Access ==============================================================================================================
+
+	template<typename T> requires(contains_element_v<T, TypesT...>)
+	T& get() {
+		return *static_cast<T*>(_handle);
+	}
+
+	template<typename T> requires(contains_element_v<T, TypesT...>)
+	const T& get() const {
+		return *static_cast<T*>(_handle);
+	}
+
+	template<size_t I, typename T = nth_element_t<I, TypesT...>> requires(contains_element_v<T, TypesT...>)
+	T& get() {
+		return *static_cast<T*>(_handle);
+	}
+
+	template<size_t I, typename T = nth_element_t<I, TypesT...>> requires(contains_element_v<T, TypesT...>)
+	const T& get() const {
+		return *static_cast<T*>(_handle);
+	}
+
+
+
+
+private:
+	union {
+		byte_t _bytes[size];
+		void*  _handle;
+	};
+	size_t _type;
+
+	void _clear() {
+		if (_type == nulltype) {
+			return;
+		}
+
+		((_type == find_element_v<TypesT, TypesT...> ?
+			fennec::destruct<TypesT>(_handle) :
+			(0)
+		), ...);
+		_type = nulltype;
+	}
+};
+
+}
+
 #endif // FENNEC_CONTAINERS_VARIANT_H

include/fennec/lang/detail/_type_sequences.h

@@ -19,13 +19,19 @@
 #ifndef FENNEC_LANG_DETAIL_TYPE_SEQUENCES_H
 #define FENNEC_LANG_DETAIL_TYPE_SEQUENCES_H
 
+#include <fennec/math/common.h>
 #include <fennec/lang/type_transforms.h>
 
 namespace fennec::detail
 {
+	template<typename...TypesT> struct _type_sequence {};
 
 	template<typename FirstT, typename... RestT> struct _first_element : type_identity<FirstT> {};
 
+
+
+// fennec::nth_element =================================================================================================
+
 	template<size_t n, size_t i, typename...TypesT> struct _nth_element;
 
 	template<size_t n, size_t i> struct _nth_element<n, i> : type_identity<void> {};
@@ -35,6 +41,56 @@ namespace fennec::detail
 		n == i, HeadT,
 		typename _nth_element<n, i + 1, RestT...>::type
 	> {};
+
+
+
+// fennec::max_element_size ============================================================================================
+
+	template<size_t, typename...> struct _max_element_size;
+
+	template<size_t M, typename HeadT>
+	struct _max_element_size<M, HeadT>
+		: integral_constant<size_t, fennec::max(M, sizeof(HeadT))> {
+	};
+
+	template<size_t M, typename HeadT, typename...RestT>
+	struct _max_element_size<M, HeadT, RestT...>
+		: _max_element_size<fennec::max(M, sizeof(HeadT)), RestT...> {
+	};
+
+
+
+// fennec::find_element ================================================================================================
+
+	template<size_t N, typename, typename...> struct _find_element;
+
+	template<size_t N, typename FindT, typename HeadT>
+	struct _find_element<N, FindT, HeadT> : integral_constant<size_t, is_same_v<FindT, HeadT> ? N : N + 1> {};
+
+	template<size_t N, typename FindT, typename HeadT, typename...RestT> requires(is_same_v<FindT, HeadT>)
+	struct _find_element<N, FindT, HeadT, RestT...>
+		: conditional_t<is_same_v<FindT, HeadT>, integral_constant<size_t, N>, _find_element<N + 1, FindT, RestT...>> {};
+
+
+// fennec::search_element ==============================================================================================
+
+	template<template<typename> typename, typename...> struct _search_element;
+
+	template<template<typename> typename SearchT> struct _search_element<SearchT> : type_identity<void> {};
+
+	template<template<typename> typename SearchT, typename HeadT, typename...RestT> requires(SearchT<HeadT>{})
+	struct _search_element<SearchT, HeadT, RestT...>
+		: conditional_t<SearchT<HeadT>{}, type_identity<HeadT>, _search_element<SearchT, RestT...>> {
+	};
+
+	template<template<typename, typename...> typename, typename, typename...> struct _search_element_args;
+
+	template<template<typename, typename...> typename SearchT, typename...ArgsT>
+	struct _search_element_args<SearchT, _type_sequence<ArgsT...>> : type_identity<void> {};
+
+	template<template<typename, typename...> typename SearchT, typename HeadT, typename...RestT, typename...ArgsT>
+	struct _search_element_args<SearchT, _type_sequence<ArgsT...>, HeadT, RestT...>
+		: conditional_t<SearchT<HeadT, ArgsT...>{}, type_identity<HeadT>, _search_element_args<SearchT, _type_sequence<ArgsT...>, RestT...>> {};
 }
 
 #endif // FENNEC_LANG_DETAIL_TYPE_SEQUENCES_H

include/fennec/lang/detail/_type_traits.h

@@ -63,9 +63,19 @@ namespace fennec::detail
 	template<>         struct _is_floating_point<float_t>  : true_type {};
 	template<>         struct _is_floating_point<double_t> : true_type {};
 
-	template<typename>   struct _is_pointer : false_type {};
+	template<typename>   struct _is_pointer     : false_type {};
 	template<typename T> struct _is_pointer<T*> : true_type {};
 
+	template<typename>   struct _is_reference      : false_type {};
+	template<typename T> struct _is_reference<T&>  : true_type {};
+	template<typename T> struct _is_reference<T&&> : true_type {};
+
+	template<typename>   struct _is_lvalue_reference     : false_type {};
+	template<typename T> struct _is_lvalue_reference<T&> : true_type  {};
+
+	template<typename>   struct _is_rvalue_reference      : false_type {};
+	template<typename T> struct _is_rvalue_reference<T&&> : true_type  {};
+
 	template<typename T> struct _is_complete {
 		template<typename U>
 		static auto test(U*)  -> bool_constant<sizeof(U) == sizeof(U)>;

include/fennec/lang/intrinsics.h

@@ -213,6 +213,14 @@
 # define FENNEC_HAS_BUILTIN_IS_ENUM 0
 #endif
 
+// Inconsistent without intrinsics.
+#if __has_builtin(__is_union)
+# define FENNEC_HAS_BUILTIN_IS_UNION 1
+# define FENNEC_BUILTIN_IS_UNION(arg) __is_union(arg)
+#else
+# define FENNEC_HAS_BUILTIN_IS_UNION 0
+#endif
+
 // Inconsistent without intrinsics
 #if __has_builtin(__is_final)
 # define FENNEC_HAS_BUILTIN_IS_FINAL 1
@@ -221,12 +229,20 @@
 # define FENNEC_HAS_BUILTIN_IS_FINAL 0
 #endif
 
-// Inconsistent with dynamic intrinsics, requires a massive table for static intrinsics
+// Inconsistent without intrinsics
-#if __has_builtin(__is_fundamental)
+#if __has_builtin(__is_function)
-# define FENNEC_HAS_BUILTIN_IS_FUNDAMENTAL 1
+# define FENNEC_HAS_BUILTIN_IS_FUNCTION 1
-# define FENNEC_BUILTIN_IS_FUNDAMENTAL(arg) __is_fundamental(arg)
+# define FENNEC_BUILTIN_IS_FUNCTION(arg) __is_function(arg)
 #else
-# define FENNEC_HAS_BUILTIN_IS_FUNDAMENTAL 0
+# define FENNEC_HAS_BUILTIN_IS_FUNCTION 0
+#endif
+
+// Inconsistent without intrinsics
+#if __has_builtin(__is_object)
+# define FENNEC_HAS_BUILTIN_IS_OBJECT 1
+# define FENNEC_BUILTIN_IS_OBJECT(arg) __is_object(arg)
+#else
+# define FENNEC_HAS_BUILTIN_IS_FUNCTION 0
 #endif
 
 // Inconsistent without intrinsics

include/fennec/lang/metaprogramming.h

@@ -43,6 +43,7 @@
 /// - \subpage fennec_lang_conditional_types
 /// - \subpage fennec_lang_numeric_transforms
 /// - \subpage fennec_lang_metasequences
+/// - \subpage fennec_lang_type_identity
 /// - \subpage fennec_lang_type_sequences
 /// - \subpage fennec_lang_type_traits
 /// - \subpage fennec_lang_type_transforms

include/fennec/lang/type_sequences.h

@@ -51,6 +51,12 @@
 ///         \ref fennec::replace_first_element "typename replace_first_element<ClassT, SubT, OriginT, RestT...>::type"<br>
 ///     <td width="50%" style="vertical-align: top">
 ///         \copydoc fennec::replace_first_element
+///
+/// <tr><td width="50%" style="vertical-align: top"> <br>
+///         \ref fennec::is_unique "is_unique<TypesT...>::value"<br>
+///         \ref fennec::is_unique_v "is_unique_v<TypesT...>"
+///     <td width="50%" style="vertical-align: top">
+///         \copydoc fennec::is_unique
 /// </table>
 ///
 
@@ -59,6 +65,12 @@
 namespace fennec
 {
 
+
+template<typename...TypesT> struct type_sequence {};
+
+
+// fennec::first_element ===============================================================================================
+
 ///
 /// \brief Get the first element of a template parameter pack
 /// \tparam TypesT the Parameter Pack
@@ -69,8 +81,20 @@ template<typename...TypesT> struct first_element : detail::_first_element<TypesT
 template<typename...TypesT> using first_element_t = typename first_element<TypesT...>::type;
 
 
+
+// fennec::nth_element =================================================================================================
+
+///
+/// \brief Gets the type of the nth element of the type sequence `TypesT...`
+/// \tparam n The index in the type sequence
+/// \tparam TypesT The type sequence
 template<size_t n, typename...TypesT> struct nth_element : detail::_nth_element<n, 0, TypesT...> {};
 
+template<size_t n, typename...TypesT> using nth_element_t = nth_element<n, TypesT...>::type;
+
+
+
+// fennec::replace_first_element =======================================================================================
 
 ///
 /// \brief Take a Template with a Pack `ClassT<ArgsT...>` and replace the first `ArgT` of `ArgsT...` with `SubT`
@@ -84,6 +108,99 @@ template<
 struct replace_first_element<ClassT<OriginT, RestT...>, SubT> // Specialization
 	{ using type = ClassT<SubT, RestT...>; };                 // Definition
 
+
+
+// fennec::max_element_size ============================================================================================
+
+///
+/// \brief Gets the max value of the size of each type in the sequence, i.e. `max(sizeof(Ts)...)`
+/// \tparam Ts The type sequence to check
+template<typename...Ts> struct max_element_size : detail::_max_element_size<0, Ts...> {};
+
+///
+/// \brief Shorthand for `max_element_size<Ts...>::value`
+/// \tparam Ts The type sequence to check
+template<typename...Ts> constexpr size_t max_element_size_v = max_element_size<Ts...>::value;
+
+
+
+// fennec::find_element ================================================================================================
+
+///
+/// \brief Finds the index of `T` in `Ts`, if `T` is not found, results in `sizeof...(Ts)`
+/// \tparam T The type to find
+/// \tparam Ts The type sequence to check
+template<typename T, typename...Ts> struct find_element : detail::_find_element<0, T, Ts...> {};
+
+///
+/// \brief Shorthand for `find_element<T, Ts...>::value`
+/// \tparam T The type to find
+/// \tparam Ts The type sequence to check
+template<typename T, typename...Ts> constexpr size_t find_element_v = find_element<T, Ts...>::value;
+
+
+
+// fennec::search_element ==============================================================================================
+
+
+///
+/// \brief Find the first element in `TypesT...` that satisfies `SearchT<T>`
+/// \tparam SearchT A type that satisfies `template<typename>` and contains `static constexpr bool value;` to use for searching
+/// \tparam TypesT The type sequence to search
+template<template<typename> typename SearchT, typename...TypesT> struct search_element : detail::_search_element<SearchT, TypesT...> {};
+
+///
+/// \brief Shorthand for `search_element_t<T, Ts...>::type`
+/// \tparam SearchT A type that satisfies `template<typename>` and contains `static constexpr bool value;` to use for searching
+/// \tparam TypesT The type sequence to search
+template<template<typename> typename SearchT, typename...TypesT> using search_element_t = search_element<SearchT, TypesT...>::type;
+
+
+template<template<typename, typename...> typename, typename, typename...> struct search_element_args;
+
+template<template<typename, typename...> typename SearchT, typename...TypesT, typename...ArgsT>
+struct search_element_args<SearchT, type_sequence<ArgsT...>, TypesT...>
+	: detail::_search_element_args<SearchT, detail::_type_sequence<ArgsT...>, TypesT...> {
+};
+
+
+
+
+// fennec::contains_element ============================================================================================
+
+///
+/// \brief Checks if the type sequence `Ts...` contains `T`
+/// \tparam T The type to find
+/// \tparam Ts The type sequence to check
+template<typename T, typename...Ts> struct contains_element : bool_constant<(is_same_v<T, Ts> or ...)> {};
+
+///
+/// \brief Shorthand for `contains_element_v<T, Ts...>::value`
+/// \tparam T The type to find
+/// \tparam Ts The type sequence to check
+template<typename T, typename...Ts> constexpr bool contains_element_v = contains_element<T, Ts...>::value;
+
+
+
+// fennec::is_unique ===================================================================================================
+
+///
+/// \brief Checks if all types in a type sequence are unique
+/// \tparam Ts The type sequence to check
+template<typename...Ts> struct is_unique    : false_type {};
+
+// Single type case
+template<typename T>  struct is_unique<T> : true_type {};
+
+// Recursion case
+template<typename T, typename...Ts> requires(not is_same_v<T, Ts> && ...)
+struct is_unique<T, Ts...> : is_unique<Ts...> {};
+
+///
+/// \brief Shorthand for `is_unique<Ts...>::value`
+/// \tparam Ts The type sequence to check
+template<typename...Ts> constexpr bool is_unique_v = is_unique<Ts...>::value;
+
 }
 
 

include/fennec/lang/type_traits.h

@@ -360,7 +360,7 @@
 ///         \ref fennec::is_nothrow_move_constructible "is_nothrow_move_constructible<ClassT, ArgsT...>::value"<br>
 ///         \ref fennec::is_nothrow_move_constructible_v "is_nothrow_move_constructible_v<ClassT, ArgsT...>"
 ///     <td width="50%" style="vertical-align: top">
-///         \movedetails fennec::is_move_constructible
+///         \copydetails fennec::is_move_constructible
 ///
 /// <tr><td width="50%" style="vertical-align: top"> <br>
 ///         \ref fennec::is_assignable "is_assignable<ClassT, ArgsT...>::value"<br>
@@ -390,7 +390,7 @@
 ///         \ref fennec::is_nothrow_move_assignable "is_nothrow_move_assignable<ClassT, ArgsT...>::value"<br>
 ///         \ref fennec::is_nothrow_move_assignable_v "is_nothrow_move_assignable_v<ClassT, ArgsT...>"
 ///     <td width="50%" style="vertical-align: top">
-///         \movedetails fennec::is_move_assignable
+///         \copydetails fennec::is_move_assignable
 ///
 /// <tr><td width="50%" style="vertical-align: top"> <br>
 ///         \ref fennec::is_destructible "is_destructible<ClassT, ArgsT...>::value"<br>
@@ -446,7 +446,7 @@ constexpr inline bool is_constant_evaluated() noexcept {
 // fennec::is_void =====================================================================================================
 
 ///
-/// \brief check if \p T is of type void
+/// \brief Check if \p T is of type void
 ///
 /// \details Stores a boolean value in `is_void::value`, representing whether the provided type is of base type void.
 /// \tparam T type to check
@@ -454,7 +454,7 @@ template<typename T> struct is_void
 	: detail::_is_void<remove_cvr_t<T>>{};
 
 ///
-/// \brief shorthand for ```is_void<T>::value```
+/// \brief Shorthand for ```is_void<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_void_v = is_void<T>::value;
 
@@ -463,7 +463,7 @@ template<typename T> constexpr bool_t is_void_v = is_void<T>::value;
 // fennec::is_null_pointer =============================================================================================
 
 ///
-/// \brief check if \p T is of type nullptr_t
+/// \brief Check if \p T is of type nullptr_t
 ///
 /// \details Stores a boolean value in `is_null_pointer::value`, representing whether the provided type is of base type nullptr_t.
 /// \tparam T type to check
@@ -471,7 +471,7 @@ template<typename T> struct is_null_pointer
 	: detail::_is_null_pointer<remove_cvr_t<T>>{};
 
 ///
-/// \brief shorthand for ```is_null_pointer<T>::value```
+/// \brief Shorthand for ```is_null_pointer<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_null_pointer_v = is_null_pointer<T>::value;
 
@@ -482,7 +482,7 @@ template<typename T> constexpr bool_t is_null_pointer_v = is_null_pointer<T>::va
 #ifdef FENNEC_BUILTIN_IS_ARRAY
 
 ///
-/// \brief check if \p T is of an array type
+/// \brief Check if \p T is of an array type
 /// \tparam T type to check
 template<typename T> struct is_array
 	: bool_constant<FENNEC_BUILTIN_IS_ARRAY(T)> {};
@@ -490,7 +490,7 @@ template<typename T> struct is_array
 #else
 
 ///
-/// \brief check if \p T is of an array type
+/// \brief Check if \p T is of an array type
 /// \tparam T type to check
 template<typename T> struct is_array
 	: false_type {};
@@ -506,25 +506,72 @@ template<typename T> struct is_array<T[]>
 #endif
 
 ///
-/// \brief shorthand for ```is_array<T>::value```
+/// \brief Shorthand for ```is_array<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_array_v = is_array<T>::value;
 
+
+
+// fennec::is_enum ====================================================================================================
+
+///
+/// \brief Check if \p T is an enum
+/// \tparam T type to check
+template<typename T> struct is_enum
+	: bool_constant<FENNEC_BUILTIN_IS_ENUM(T)> {};
+
+///
+/// \brief Check if \p T is a class
+/// \tparam T type to check
+template<typename T> constexpr size_t is_enum_v = is_enum<T>::value;
+
+
+
+// fennec::is_union ====================================================================================================
+
+///
+/// \brief Check if \p T is a union
+/// \tparam T type to check
+template<typename T> struct is_union
+	: bool_constant<FENNEC_BUILTIN_IS_UNION(T)> {};
+
+///
+/// \brief Check if \p T is a class
+/// \tparam T type to check
+template<typename T> constexpr size_t is_union_v = is_union<T>::value;
+
+
+
 // fennec::is_class ====================================================================================================
 
 ///
-/// \brief check if \p T is a class
+/// \brief Check if \p T is a class
 /// \tparam T type to check
 template<typename T> struct is_class
 	: bool_constant<FENNEC_BUILTIN_IS_CLASS(T)> {};
 
 ///
-/// \brief check if \p T is a class
+/// \brief Check if \p T is a class
 /// \tparam T type to check
 template<typename T> constexpr size_t is_class_v = is_class<T>::value;
 
 
 
+// fennec::is_function ====================================================================================================
+
+///
+/// \brief Check if \p T is a class
+/// \tparam T type to check
+template<typename T> struct is_function
+	: bool_constant<FENNEC_BUILTIN_IS_FUNCTION(T)> {};
+
+///
+/// \brief Check if \p T is a class
+/// \tparam T type to check
+template<typename T> constexpr size_t is_function_v = is_function<T>::value;
+
+
+
 // Integral Types ======================================================================================================
 
 
@@ -532,7 +579,7 @@ template<typename T> constexpr size_t is_class_v = is_class<T>::value;
 // fennec::is_bool =====================================================================================================
 
 ///
-/// \brief check if \p T is of type bool
+/// \brief Check if \p T is of type bool
 ///
 /// \details Stores a boolean value in `is_bool::value`, representing whether the provided type is of base type bool.
 /// \tparam T type to check
@@ -540,12 +587,16 @@ template<typename T> struct is_bool
 	: detail::_is_bool<remove_cvr_t<T>>{};
 
 ///
-/// \brief shorthand for ```is_bool<T>::value```
+/// \brief Shorthand for ```is_bool<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_bool_v = is_bool<T>::value;
 
+
+
+// fennec::is_integral =================================================================================================
+
 ///
-/// \brief check if \p T is of an integral
+/// \brief Check if \p T is of an integral
 ///
 /// \details Stores a boolean value in `is_integral::value`, representing whether the provided type is of a base integer type.
 /// \tparam T type to check
@@ -553,13 +604,17 @@ template<typename T> struct is_integral
 	: detail::_is_integral<remove_cvr_t<T>> {};
 
 ///
-/// \brief shorthand for ```is_integral<T>::value```
+/// \brief Shorthand for ```is_integral<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_integral_v = is_integral<T>::value;
 
 
+
+// fennec::is_signed =================================================================================================
+
+
 ///
-/// \brief check if \p T is of a signed integral
+/// \brief Check if \p T is of a signed integral
 ///
 /// \details Checks if type `T` is a signed type i.e. `T(-1) < T(0)` and stores it in `is_same::value`.
 /// \tparam T type to check
@@ -567,13 +622,17 @@ template<typename T> struct is_signed
 	: detail::_is_signed<remove_cvr_t<T>> {};
 
 ///
-/// \brief shorthand for ```is_signed<T>::value```
+/// \brief Shorthand for ```is_signed<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_signed_v = is_signed<T>::value;
 
 
+
+// fennec::is_unsigned =================================================================================================
+
+
 ///
-/// \brief check if \p T is of an unsigned integral
+/// \brief Check if \p T is of an unsigned integral
 ///
 /// \details Checks if type `T` is an unsigned type i.e. `T(-1) > T(0)` and stores it in `is_same::value`.
 /// \tparam T type to check
@@ -581,7 +640,7 @@ template<typename T> struct is_unsigned
 	: detail::_is_unsigned<remove_cvr_t<T>> {};
 
 ///
-/// \brief shorthand for ```is_unsigned<T>::value```
+/// \brief Shorthand for ```is_unsigned<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_unsigned_v = is_unsigned<T>::value;
 
@@ -590,15 +649,15 @@ template<typename T> constexpr bool_t is_unsigned_v = is_unsigned<T>::value;
 // Floating Point Types ================================================================================================
 
 ///
-/// \brief check if \p T is of a floating point type
+/// \brief Check if \p T is of a floating point type
 ///
-/// \details Checks if type `T` is a floating point type and store it in `is_same::value`.
+/// \details Stores a boolean value in `is_floating_point::value`, representing whether the provided type is of a base floating point type.
 /// \tparam T type to check
 template<typename T> struct is_floating_point
 	: detail::_is_floating_point<remove_cvr_t<T>>{};
 
 ///
-/// \brief shorthand for ```is_floating_point<T>::value```
+/// \brief Shorthand for ```is_floating_point<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_floating_point_v = is_floating_point<T> {};
 
@@ -606,24 +665,69 @@ template<typename T> constexpr bool_t is_floating_point_v = is_floating_point<T>
 // Pointer Types =======================================================================================================
 
 ///
-/// \brief check if \p T is of a floating point type
+/// \brief Check if \p T is of a pointer type
 ///
-/// \details Checks if type `T` is a floating point type and store it in `is_same::value`.
+/// \details Stores a boolean value in `is_pointer::value`, representing whether the provided type is of a base pointer type.
 /// \tparam T type to check
 template<typename T> struct is_pointer
 	: detail::_is_pointer<remove_cvr_t<T>>{};
 
 ///
-/// \brief shorthand for ```is_floating_point<T>::value```
+/// \brief Shorthand for ```is_pointer<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_pointer_v = is_pointer<T> {};
 
 
+// Reference Types =======================================================================================================
+
+///
+/// \brief Check if \p T is of a floating point type
+///
+/// \details Checks if type `T` is a floating point type and store it in `is_same::value`.
+/// \tparam T type to check
+template<typename T> struct is_reference
+	: detail::_is_reference<T>{};
+
+///
+/// \brief Shorthand for ```is_floating_point<T>::value```
+/// \tparam T type to check
+template<typename T> constexpr bool_t is_reference_v = is_reference<T> {};
+
+
+
+///
+/// \brief Check if \p T is of a floating point type
+///
+/// \details Checks if type `T` is a floating point type and store it in `is_same::value`.
+/// \tparam T type to check
+template<typename T> struct is_lvalue_reference
+	: detail::_is_lvalue_reference<T>{};
+
+///
+/// \brief Shorthand for ```is_floating_point<T>::value```
+/// \tparam T type to check
+template<typename T> constexpr bool_t is_lvalue_reference_v = is_lvalue_reference<T> {};
+
+
+///
+/// \brief Check if \p T is of a floating point type
+///
+/// \details Checks if type `T` is a floating point type and store it in `is_same::value`.
+/// \tparam T type to check
+template<typename T> struct is_rvalue_reference
+	: detail::_is_rvalue_reference<T>{};
+
+///
+/// \brief Shorthand for ```is_floating_point<T>::value```
+/// \tparam T type to check
+template<typename T> constexpr bool_t is_rvalue_reference_v = is_rvalue_reference<T> {};
+
+
 
 // Arithmetic Types ====================================================================================================
 
 ///
-/// \brief check if \p T is an arithmetic type
+/// \brief Check if \p T is an arithmetic type
 ///
 /// \details Checks if type `T` is a built-in type with arithmetic operators and store it in `is_same::value`.
 /// \tparam T type to check
@@ -631,21 +735,38 @@ template<typename T> struct is_arithmetic
 	: bool_constant<is_integral_v<T> or is_floating_point_v<T>>{};
 
 ///
-/// \brief shorthand for ```is_arithmetic<T>::value```
+/// \brief Shorthand for ```is_arithmetic<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_arithmetic_v = is_arithmetic<T>::value;
 
 
+
+// Arithmetic Types ====================================================================================================
+
+///
+/// \brief Check if \p T is an arithmetic type
+///
+/// \details Checks if type `T` is a built-in type with arithmetic operators and store it in `is_same::value`.
+/// \tparam T type to check
+template<typename T> struct is_scalar
+	: bool_constant<is_arithmetic_v<T> or is_enum_v<T> or is_pointer_v<T>>{};
+
+///
+/// \brief Shorthand for ```is_scalar<T>::value```
+/// \tparam T type to check
+template<typename T> constexpr bool_t is_scalar_v = is_scalar<T>::value;
+
+
 // fennec::is_fundamental ==============================================================================================
 
 ///
-/// \brief check if \p T is a fundamental type, i.e. arithmetic, void, or nullptr_t
+/// \brief Check if \p T is a fundamental type, i.e. arithmetic, void, or nullptr_t
 /// \tparam T type to check
 template<typename T> struct is_fundamental
 	: bool_constant<is_arithmetic_v<T> || is_void_v<T> || is_null_pointer_v<T>>{};
 
 ///
-/// \brief shorthand for ```is_fundamental<T>::value```
+/// \brief Shorthand for ```is_fundamental<T>::value```
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_fundamental_v = is_fundamental<T>::value;
 
@@ -653,7 +774,7 @@ template<typename T> constexpr bool_t is_fundamental_v = is_fundamental<T>::valu
 // fennec::is_same =====================================================================================================
 
 ///
-/// \brief check if the two types are identical
+/// \brief Check if the two types are identical
 ///
 /// \details Checks if `T0` and `T1` are identical and store it in `is_same::value`
 /// \tparam T0 first type to check
@@ -664,7 +785,7 @@ template<typename T0, typename T1> struct is_same : false_type {};
 template<typename T> struct is_same<T, T> : true_type {};
 
 ///
-/// \brief shorthand for ```is_same<T0, T1>::value```
+/// \brief Shorthand for ```is_same<T0, T1>::value```
 /// \tparam T0 first type to check
 /// \tparam T1 second type to check
 template<typename T0, typename T1> constexpr bool_t is_same_v = is_same<T0, T1> {};
@@ -672,63 +793,63 @@ template<typename T0, typename T1> constexpr bool_t is_same_v = is_same<T0, T1>
 // fennec::is_complete ==============================================================================================
 
 ///
-/// \brief check if type `T` is complete
+/// \brief Check if type `T` is complete
 ///
 /// \details Checks if `T`
 /// \tparam T type to check
 template<typename T> struct is_complete : detail::_is_complete<T>::type {};
 
 ///
-/// \brief shorthand for `is_complete<TypeT0, TypeT1>::value`
+/// \brief Shorthand for `is_complete<TypeT0, TypeT1>::value`
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_complete_v = is_complete<T>{};
 
 // fennec::is_iterable ==============================================================================================
 
 ///
-/// \brief check if type `T` is iterable
+/// \brief Check if type `T` is iterable
 ///
 /// \details Checks if `T`
 /// \tparam T type to check
 template<typename T> struct is_iterable : decltype(detail::_is_iterable<T>(0)) {};
 
 ///
-/// \brief shorthand for `is_iterable<TypeT0, TypeT1>::value`
+/// \brief Shorthand for `is_iterable<TypeT0, TypeT1>::value`
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_iterable_v = is_iterable<T>{};
 
 // fennec::is_indexable ==============================================================================================
 
 ///
-/// \brief check if type `T` is indexable
+/// \brief Check if type `T` is indexable
 ///
 /// \details Checks if `T`
 /// \tparam T type to check
 template<typename T> struct is_indexable : decltype(detail::_is_indexable<T>(0)) {};
 
 ///
-/// \brief shorthand for `is_indexable<TypeT0, TypeT1>::value`
+/// \brief Shorthand for `is_indexable<TypeT0, TypeT1>::value`
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_indexable_v = is_indexable<T>{};
 
 // fennec::is_mappable ==============================================================================================
 
 ///
-/// \brief check if type `T` is mappable
+/// \brief Check if type `T` is mappable
 ///
 /// \details Checks if `T`
 /// \tparam T type to check
 template<typename T> struct is_mappable : decltype(detail::_is_mappable<T>(0)) {};
 
 ///
-/// \brief shorthand for `is_mappable<TypeT0, TypeT1>::value`
+/// \brief Shorthand for `is_mappable<TypeT0, TypeT1>::value`
 /// \tparam T type to check
 template<typename T> constexpr bool_t is_mappable_v = is_mappable<T>{};
 
 // fennec::is_convertible ==============================================================================================
 
 ///
-/// \brief check if type `T0` can be converted `T1`
+/// \brief Check if type `T0` can be converted `T1`
 ///
 /// \details Checks if `TypeT0`
 /// \tparam FromT First type
@@ -737,7 +858,7 @@ template<typename FromT, typename ToT> struct is_convertible
 	: bool_constant<FENNEC_BUILTIN_IS_CONVERTIBLE(FromT, ToT)> {};
 
 ///
-/// \brief shorthand for `can_convert<TypeT0, TypeT1>::value`
+/// \brief Shorthand for `can_convert<TypeT0, TypeT1>::value`
 /// \param FromT First type
 /// \param ToT Second type
 template<typename FromT, typename ToT> constexpr bool_t is_convertible_v = is_convertible<FromT, ToT>{};
@@ -779,7 +900,7 @@ template<typename ClassT> struct is_default_constructible
 
 ///
 /// \brief Shorthand for `is_default_constructible<ClassT>::value`
-template<typename ClassT, typename...ArgsT> constexpr bool_t is_default_constructible_v = is_default_constructible<ClassT>{};
+template<typename ClassT> constexpr bool_t is_default_constructible_v = is_default_constructible<ClassT>{};
 
 
 

include/fennec/lang/types.h

@@ -213,6 +213,8 @@ namespace fennec
 
 	using bool_t = bool; ///< \brief A conditional type
 
+	using byte_t = unsigned char; ///< \brief A type capable of holding a single byte
+
 	using char_t  = char;          ///< \brief A type capable of holding an ascii value
 	using schar_t = signed char;   ///< \brief A type with the size of a char, capable of holding a signed 8-bit integer
 	using uchar_t = unsigned char; ///< \brief A type with the size of a char, capable of holding an unsigned 8-bit integer

include/fennec/platform/interface/platform.h

@@ -26,6 +26,7 @@
 #include <fennec/platform/interface/fwd.h>
 #include <fennec/platform/interface/window.h>
 #include <fennec/rtti/enable.h>
+#include <fennec/rtti/singleton.h>
 #include <fennec/rtti/detail/_this_t.h>
 
 /*
@@ -62,12 +63,12 @@
 namespace fennec
 {
 
-class platform {
+class platform : singleton<platform*> {
 public:
 	using shared_object = struct shared_object;
 	using symbol        = void*;
 
-	platform() = default;
+	platform();
 	virtual ~platform() = default;
 	platform(const platform&) = delete;
 

include/fennec/platform/linux/platform.h

@@ -32,6 +32,9 @@ public:
 	void initialize() override;
 
 	void shutdown() override;
+
+	FENNEC_RTTI_CLASS_ENABLE(unix_platform) {
+	}
 };
 
 }

include/fennec/platform/unix/platform.h

@@ -35,7 +35,9 @@ public:
 	symbol find_symbol(shared_object* obj, const cstring& name) override;
 
 private:
+	FENNEC_RTTI_CLASS_ENABLE(platform) {
 
+	}
 };
 
 }

include/fennec/rtti/enable.h

@@ -41,7 +41,7 @@
 #define FENNEC_RTTI_CLASS_ENABLE(...) \
 public: \
 	using super_class_list = fennec::typelist<__VA_ARGS__>; \
-	virtual fennec::type get_type() { return fennec::type::get_from_instance(this); } \
+	virtual inline fennec::type get_type() const { return fennec::type::get_from_instance(this); } \
 	FENNEC_DEFINE_THIS_T; \
 private: \
 	FENNEC_CLASS_STATIC_CONSTRUCTOR(_init_reflection)

include/fennec/rtti/forward.h

@@ -31,4 +31,17 @@
 #ifndef FENNEC_RTTI_FORWARD_H
 #define FENNEC_RTTI_FORWARD_H
 
+namespace fennec
+{
+
+class function;
+struct vtypelist;
+template<typename...> struct typelist;
+
+struct type;
+struct type_data;
+struct type_storage;
+
+}
+
 #endif // FENNEC_RTTI_FORWARD_H

include/fennec/rtti/singleton.h

@@ -0,0 +1,52 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+///
+/// \file singleton.h
+/// \brief
+///
+///
+/// \details
+/// \author Medusa Slockbower
+///
+/// \copyright Copyright © 2025 Medusa Slockbower ([GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html))
+///
+///
+
+#ifndef FENNEC_RTTI_SINGLETON_H
+#define FENNEC_RTTI_SINGLETON_H
+
+namespace fennec
+{
+
+template<typename T>
+struct singleton {
+	static T& instance() requires(is_pointer_v<T>) {
+		static T instance = nullptr;
+		return instance;
+	}
+
+	static T& instance() requires(is_default_constructible_v<T> and not is_pointer_v<T>) {
+		static T instance;
+		return instance;
+	}
+};
+
+}
+
+#endif // FENNEC_RTTI_SINGLETON_H

include/fennec/rtti/type_data.h

@@ -36,7 +36,7 @@
 #include <fennec/string/string.h>
 #include <fennec/memory/pointers.h>
 #include <fennec/rtti/typeid.h>
-#include <fennec/rtti/typelist.h>
+#include <fennec/rtti/forward.h>
 #include <fennec/rtti/detail/_type_name.h>
 
 namespace fennec

include/fennec/rtti/type_registry.h

@@ -0,0 +1,85 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+// =====================================================================================================================
+
+///
+/// \file type_registry.h
+/// \brief
+///
+///
+/// \details
+/// \author Medusa Slockbower
+///
+/// \copyright Copyright © 2025 Medusa Slockbower ([GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html))
+///
+///
+
+#ifndef FENNEC_RTTI_TYPE_REGISTRY_H
+#define FENNEC_RTTI_TYPE_REGISTRY_H
+#include <fennec/containers/priority_queue.h>
+#include <fennec/rtti/type.h>
+
+namespace fennec
+{
+
+template<typename BaseT, typename...ArgsT>
+class type_registry {
+public:
+	using ctor_t = BaseT (*)(ArgsT&&...);
+
+	struct entry {
+		size_t priority;
+		type   type;
+		ctor_t ctor;
+	};
+
+	struct compare {
+		bool operator()(const entry& a, const entry& b) const {
+			return a.priority > b.priority and a.ctor < b.ctor;
+		}
+	};
+
+	using entrylist_t = priority_queue<entry, compare>;
+
+	template<typename T>
+	static void register_type(size_t priority = 0) {
+		_global_list().emplace(
+			priority,
+			type::get<T>(),
+			_constructor_helper<ArgsT...>
+		);
+	}
+
+	static const entrylist_t& get_type_list() {
+		return _global_list();
+	}
+
+private:
+	static entrylist_t& _global_list() {
+		static entrylist_t list;
+		return list;
+	}
+
+	template<typename T>
+	static BaseT* _constructor_helper(ArgsT&&...args) {
+		return new T(fennec::forward<ArgsT>(args)...);
+	}
+};
+
+}
+
+#endif // FENNEC_RTTI_TYPE_REGISTRY_H

include/fennec/rtti/typelist.h

@@ -32,13 +32,23 @@
 #define FENNEC_RTTI_TYPELIST_H
 
 #include <fennec/lang/types.h>
+#include <fennec/rtti/type.h>
 
 namespace fennec
 {
 
+struct vtypelist {
+	virtual ~vtypelist() = default;
+	virtual dynarray<type> get() = 0;
+};
+
 template<typename...TypesT>
-struct typelist {
+struct typelist : vtypelist {
 	static constexpr size_t size = sizeof...(TypesT);
+
+	virtual dynarray<type> get() {
+		return { type::get<TypesT>()... };
+	}
 };
 
 }

planning/CONTAINERS.md

@@ -40,7 +40,7 @@ Library and Template Library.
 | tuple                                |     🚧      |   🚧   |
 | optional                             |      ✅      |   ✅    |
 | variant                              |      ⛔      |   ⛔    |
-| any                                  |      ⛔      |   ⛔    |
+| generic (`std::any`)                 |      ⛔      |   ⛔    |
 | bitset                               |      ⛔      |   ⛔    |
 | array                                |      ✅      |   ✅    |
 | dynarray (`std::vector`)             |     🚧      |   🚧   |

planning/CPP_LANGUAGE.md

@@ -61,7 +61,7 @@ See:
 | is_null_pointer            |      ✅      |   ✅    |
 | is_integral                |      ✅      |   ✅    |
 | is_floating_point          |      ✅      |   ✅    |
-| is_array                   |      ✅      |  🚧    |
+| is_array                   |      ✅      |   🚧   |
 | is_enum                    |      ⛔      |   ⛔    |
 | is_union                   |      ⛔      |   ⛔    |
 | is_class                   |      ✅      |   ✅    |

source/platform/interface/platform.cpp

@@ -21,6 +21,11 @@
 namespace fennec
 {
 
+platform::platform() {
+	assertf(instance() == nullptr, "Attempted to instantiate multiple platforms.");
+	instance() = this;
+}
+
 void platform::initialize() {
 }