From e425c81db664af858bfbb5acee9adf5927bb90c1 Mon Sep 17 00:00:00 2001
From: Guillaume Jacquemin <w.jcm59@gmail.com>
Date: Sun, 8 Dec 2024 20:33:13 +0100
Subject: [PATCH] Application: improve drawUnsafeWidget().

---
 src/Application/Application.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Application/Application.h b/src/Application/Application.h
index 9c16709..1a18a16 100644
--- a/src/Application/Application.h
+++ b/src/Application/Application.h
@@ -186,6 +186,7 @@ class Application: public Platform::Sdl2Application, public efsw::FileWatchListe
 
         template<typename Functor, typename... Args>
         bool drawUnsafeWidget(Functor func, Args... args) {
+            static_assert(std::is_invocable_r_v<bool, Functor, Args...>);
             GameState game_state = _gameState; // Copying the value to reduce the risk of a data race.
             ImGui::BeginDisabled(game_state != GameState::NotRunning);
             bool result = func(std::forward<Args>(args)...);