Fix documentation

source/HotReload/src/c-api/HotReloadApi.cpp

@@ -1,3 +1,7 @@
+/**
+ * @file HotReloadApi.cpp
+ * @brief The extern "C" shim implementing hot_reload.h by delegating to hot_reload::HotReloadContext.
+ */
 #include "hot_reload/hot_reload.h"
 
 #include "../HotReloadContext.hpp"
@@ -9,6 +13,8 @@ namespace
 	/// is a hot_reload::HotReloadContext, following the same
 	/// opaque-pointer PIMPL pattern cpp-style-guide.md's NetManager
 	/// example uses. This is the one place that cast happens.
+	/// @param ctx A context previously returned by hot_reload_context_create(), or null.
+	/// @return The same object viewed as the C++ type it really is (null if @p ctx is null).
 	hot_reload::HotReloadContext* impl(::HotReloadContext* ctx)
 	{
 		return reinterpret_cast<hot_reload::HotReloadContext*>(ctx);