diff --git a/include/internal/catch_tostring.h b/include/internal/catch_tostring.h index 640fc8cb..8687c4a6 100644 --- a/include/internal/catch_tostring.h +++ b/include/internal/catch_tostring.h @@ -469,20 +469,27 @@ namespace Catch { #endif // CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER namespace Catch { - struct not_this_one {}; // Tag type for detecting which begin/ end are being selected - - // Import begin/ end from std here so they are considered alongside the fallback (...) overloads in this namespace + // Import begin/ end from std here using std::begin; using std::end; - not_this_one begin( ... ); - not_this_one end( ... ); + namespace detail { + template + struct void_type { + using type = void; + }; + + template + struct is_range_impl : std::false_type { + }; + + template + struct is_range_impl()))>::type> : std::true_type { + }; + } // namespace detail template - struct is_range { - static const bool value = - !std::is_same())), not_this_one>::value && - !std::is_same())), not_this_one>::value; + struct is_range : detail::is_range_impl { }; #if defined(_MANAGED) // Managed types are never ranges