feat(core): add constructible_utils.hpp

core/include/cubos/core/reflection/traits/constructible_utils.hpp

@@ -0,0 +1,42 @@
+/// @file
+/// @brief Utilities for @ref cubos::core::reflection::ConstructibleTrait.
+/// @note Avoid using this header as it includes `<type_traits>`.
+/// @ingroup core-reflection
+
+#pragma once
+
+#include <type_traits>
+
+#include <cubos/core/reflection/traits/constructible.hpp>
+
+namespace cubos::core::reflection
+{
+    /// @brief Returns a ConstructibleTrait with the default, copy and move constructors, set only
+    /// if the type has them.
+    /// @warning Avoid using this function as its header includes `<type_traits>`.
+    /// @tparam T Type.
+    /// @return ConstructibleTrait.
+    /// @ingroup core-reflection
+    template <typename T>
+    ConstructibleTrait autoConstructibleTrait()
+    {
+        auto builder = ConstructibleTrait::typed<T>();
+
+        if (std::is_default_constructible<T>::value)
+        {
+            builder = static_cast<ConstructibleTrait::Builder<T>&&>(builder).withDefaultConstructor();
+        }
+
+        if (std::is_copy_constructible<T>::value)
+        {
+            builder = static_cast<ConstructibleTrait::Builder<T>&&>(builder).withCopyConstructor();
+        }
+
+        if (std::is_move_constructible<T>::value)
+        {
+            builder = static_cast<ConstructibleTrait::Builder<T>&&>(builder).withMoveConstructor();
+        }
+
+        return static_cast<ConstructibleTrait::Builder<T>&&>(builder).build();
+    }
+} // namespace cubos::core::reflection