meta: internal changes

TODO

@@ -33,6 +33,6 @@ TODO:
 * runtime types support for meta for types that aren't backed by C++ types
 * built-in no-pagination storage - no_pagination page size as limits::max
 * any cdynamic to support const ownership construction
-* allow passing arguments to meta setter/getter (we can fallback on meta invoke for everything probably)
 * delegate/sigh: forward connect/disconnect from & to *
-* multi-argument meta data function support
+* allow passing arguments to meta setter/getter (we can fallback on meta invoke probably)
+* meta: remove ctx arg from utilities (handle/any), container ctors/funcs (it), data getter (handle), ctor and func invoke (any, with check)

src/entt/meta/factory.hpp

@@ -387,8 +387,8 @@ public:
      */
     template<auto Setter, auto Getter, typename Policy = as_is_t>
     meta_factory data(const id_type id) noexcept {
-        using data_type = std::invoke_result_t<decltype(Getter), Type &>;
-        static_assert(Policy::template value<data_type>, "Invalid return type for the given policy");
+        using descriptor = meta_function_helper_t<Type, decltype(Getter)>;
+        static_assert(Policy::template value<typename descriptor::return_type>, "Invalid return type for the given policy");
 
         if constexpr(std::is_same_v<decltype(Setter), std::nullptr_t>) {
             base_type::data(
@@ -397,7 +397,7 @@ public:
                     /* this is never static */
                     internal::meta_traits::is_const,
                     0u,
-                    &internal::resolve<std::remove_cv_t<std::remove_reference_t<data_type>>>,
+                    &internal::resolve<std::remove_cv_t<std::remove_reference_t<typename descriptor::return_type>>>,
                     &meta_arg<type_list<>>,
                     &meta_setter<Type, Setter>,
                     &meta_getter<Type, Getter, Policy>});
@@ -410,7 +410,7 @@ public:
                     /* this is never static nor const */
                     internal::meta_traits::is_none,
                     1u,
-                    &internal::resolve<std::remove_cv_t<std::remove_reference_t<data_type>>>,
+                    &internal::resolve<std::remove_cv_t<std::remove_reference_t<typename descriptor::return_type>>>,
                     &meta_arg<type_list<type_list_element_t<static_cast<std::size_t>(args_type::size != 1u), args_type>>>,
                     &meta_setter<Type, Setter>,
                     &meta_getter<Type, Getter, Policy>});