upcast

feo_oop_engine

Macro upcast 

Source 
macro_rules! upcast {
    ($a:expr, Arc<RwLock<dyn Camera>>, Arc<RwLock<dyn GameObject>>) => { ... };
    ($a:expr, Arc<RwLock<dyn Light>>, Arc<RwLock<dyn GameObject>>) => { ... };
    ($a:expr, Arc<RwLock<$t:ty>>, Arc<RwLock<dyn GameObject>>) => { ... };
    ($a:expr, Arc<RwLock<$t:ty>>, Arc<RwLock<dyn Camera>>) => { ... };
    ($a:expr, Arc<RwLock<$t:ty>>, Arc<RwLock<dyn Light>>) => { ... };
    ($a:expr, Arc<RwLock<$t:ty>>, Arc<dyn GameObject>) => { ... };
    ($a:expr, Arc<$t:ty>, Arc<dyn Camera>) => { ... };
    ($a:expr, Arc<$t:ty>, Arc<dyn Light>) => { ... };
}