pub mod kitties { pub struct cat<U> { info : Vec<U> , meows : usize, pub how_hungry : isize, } impl<U> cat<U> { pub fn speak<T>(&mut self, stuff: Vec<T> ) { self.meows += stuff.len(); } pub fn meow_count(&mut self) -> usize { self.meows } } pub fn cat<U>(in_x : usize, in_y : isize, in_info: Vec<U> ) -> cat<U> { cat { meows: in_x, how_hungry: in_y, info: in_info } } }