persist

libraries/Ticker/src/Ticker.h

@@ -204,12 +204,16 @@ class Ticker
 private:
  struct callback_ptr_t
  {
+ // XXX undefined behaviour? fix next pr
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wcast-function-type"
  template <typename T>
  callback_ptr_t(callback_with_typed_arg_t<T> func, T arg) :
  func(reinterpret_cast<callback_with_arg_t>(func)),
  arg(reinterpret_cast<void*>(arg))
+#pragma GCC diagnostic pop
  {
- static_assert(sizeof(T) <= sizeof(void*), "");
+ static_assert(sizeof(T) <= sizeof(void*), "attach() callback argument size must be <= sizeof(void*)");
  }
 
  callback_with_arg_t func = nullptr;