Require observed for observe for better diagnostics.

NuiCpp · Jul 8, 2024 · 7fb2cb3 · 7fb2cb3
1 parent df88da9
commit 7fb2cb3
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/nui/include/nui/frontend/event_system/observed_value_combinator.hpp b/nui/include/nui/frontend/event_system/observed_value_combinator.hpp
@@ -141,6 +141,7 @@ namespace Nui
     ObservedValueCombinator(ObservedValues const&...) -> ObservedValueCombinator<ObservedValues...>;
 
     template <typename... ObservedValues>
+    requires(Detail::IsObserved<ObservedValues>::value && ...)
     ObservedValueCombinator<ObservedValues...> observe(ObservedValues const&... observedValues)
     {
         return ObservedValueCombinator(observedValues...);