use std::any::{type_name, Any}; use std::fmt::Debug; use crate::ptr::TransientPtr; #[cfg(feature = "async")] pub mod threadsafe; /// Interface for any castable function. pub trait AnyCastableFunction: Any + Debug { fn as_any(&self) -> &dyn Any; } pub struct CastableFunction where ReturnInterface: 'static + ?Sized, DIContainerT: 'static, { func: &'static dyn Fn(&DIContainerT) -> TransientPtr, } impl CastableFunction where ReturnInterface: 'static + ?Sized, { pub fn new( func: &'static dyn Fn(&DIContainerT) -> TransientPtr, ) -> Self { Self { func } } pub fn call(&self, di_container: &DIContainerT) -> TransientPtr { (self.func)(di_container) } } impl AnyCastableFunction for CastableFunction where ReturnInterface: 'static + ?Sized, DIContainerT: 'static, { fn as_any(&self) -> &dyn Any { self } } impl Debug for CastableFunction where ReturnInterface: 'static + ?Sized, { #[cfg(not(tarpaulin_include))] fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { let ret = type_name::>(); formatter.write_fmt(format_args!( "CastableFunction (&DIContainer) -> {ret} {{ ... }}" )) } } #[cfg(test)] mod tests { use super::*; use crate::di_container::blocking::MockDIContainer; #[derive(Debug, PartialEq, Eq)] struct Bacon { heal_amount: u32, } #[test] fn can_call() { let castable_func = CastableFunction::new(&|_: &MockDIContainer| { TransientPtr::new(Bacon { heal_amount: 27 }) }); let mock_di_container = MockDIContainer::new(); let output = castable_func.call(&mock_di_container); assert_eq!(output, TransientPtr::new(Bacon { heal_amount: 27 })); } }