From f4e07a4da95f91a4b5971739659edc7cf2f6f263 Mon Sep 17 00:00:00 2001
From: BlackMATov <blackmat@mail.ru>
Date: Fri, 14 Mar 2025 20:55:51 +0700
Subject: [PATCH] fix new msvc issues

---
 develop/singles/headers/meta.hpp/meta_all.hpp | 2 +-
 headers/meta.hpp/meta_types/class_type.hpp    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/develop/singles/headers/meta.hpp/meta_all.hpp b/develop/singles/headers/meta.hpp/meta_all.hpp
index 7ca48b7..e372877 100644
--- a/develop/singles/headers/meta.hpp/meta_all.hpp
+++ b/develop/singles/headers/meta.hpp/meta_all.hpp
@@ -9765,7 +9765,7 @@ namespace meta_hpp::detail::class_type_data_impl
     template < class_kind Class, class_kind Target >
     void add_upcast_info(new_base_info_t& info) {
         const class_type_data::upcast_func_t::upcast_t class_to_target = []() {
-            if constexpr ( requires { static_cast<Target*>(std::declval<Class*>()); } ) {
+            if constexpr ( std::is_base_of_v<Target, Class> && std::is_convertible_v<Class*, Target*> ) {
                 return +[](void* from) -> void* { //
                     return static_cast<Target*>(static_cast<Class*>(from));
                 };
diff --git a/headers/meta.hpp/meta_types/class_type.hpp b/headers/meta.hpp/meta_types/class_type.hpp
index b61089c..6d9182b 100644
--- a/headers/meta.hpp/meta_types/class_type.hpp
+++ b/headers/meta.hpp/meta_types/class_type.hpp
@@ -30,7 +30,7 @@ namespace meta_hpp::detail::class_type_data_impl
     template < class_kind Class, class_kind Target >
     void add_upcast_info(new_base_info_t& info) {
         const class_type_data::upcast_func_t::upcast_t class_to_target = []() {
-            if constexpr ( requires { static_cast<Target*>(std::declval<Class*>()); } ) {
+            if constexpr ( std::is_base_of_v<Target, Class> && std::is_convertible_v<Class*, Target*> ) {
                 return +[](void* from) -> void* { //
                     return static_cast<Target*>(static_cast<Class*>(from));
                 };