南京网站优化平台,好网站的建设标准,wordpress无编辑器,网站运营经验模拟常用的几种函数调用CallBack的写法。测试调用都放在函数t6_call_back_task中。我正在学习Rust#xff0c;有不对或者欠缺的地方#xff0c;欢迎交流指正
type Callback std::sync::Arcdyn Fn() Send Sync;
type CallbackReturnVal std::sync::Arcdyn Fn…模拟常用的几种函数调用CallBack的写法。测试调用都放在函数t6_call_back_task中。我正在学习Rust有不对或者欠缺的地方欢迎交流指正
type Callback std::sync::Arcdyn Fn() Send Sync;
type CallbackReturnVal std::sync::Arcdyn Fn() - ResultString, i32 Send Sync;
type CallbackResult std::sync::Arcdyn Fn(ResultString, i32) Send Sync;pub(crate) trait EventListener {fn on_action1(self, code: i32);fn on_action2(self, val: String, code: i32);
}pub(crate) struct Executor {call_back: fn(),call_back2: core::option::OptionCallback,call_back3: core::option::OptionCallbackReturnVal,call_back4: core::option::OptionCallbackResult,listener: Boxdyn EventListener static,
}struct DefaultEventListener;impl EventListener for DefaultEventListener {fn on_action1(self, code: i32) {}fn on_action2(self, val: String, code: i32) {}
}impl Executor {pub fn new() - Self {let default_callback: fn() || {println!(Default callback executed);};Executor {call_back: default_callback,call_back2: None,call_back3: None,call_back4: None,listener: Box::new(DefaultEventListener {}),}}pub fn set_call_back(mut self, cb: fn()) {self.call_back cb;}pub fn set_call_back2CB(mut self, call_back: CB)where CB: Fn() Send Sync static {self.call_back2 Some(std::sync::Arc::new(call_back));}pub fn set_call_back3CB(mut self, call_back: CB)where CB: Fn() - ResultString, i32 Send Sync static {self.call_back3 Some(std::sync::Arc::new(call_back));}pub fn set_call_back4CB(mut self, call_back: CB)where CB: Fn(ResultString, i32) Send Sync static {self.call_back4 Some(std::sync::Arc::new(call_back));}pub fn set_call_back5(mut self, listener: Boxdyn EventListener static) {self.listener listener;}pub fn process_events(self) {(self.call_back)();//call_back2if let Some(call_back2_type) self.call_back2 {call_back2_type();call_back2_type();} else {println!(No callback2 to execute.);}//call_back3if let Some(call_back3_type) self.call_back3 {let result call_back3_type();} else {println!(No callback3 to execute.);}//call_back4if let Some(call_back4_type) self.call_back4 {let ok: ResultString, i32 Result::Ok(success.to_string());let error_code: ResultString, i32 Result::Err(-10);call_back4_type(ok);} else {println!(No callback4 to execute.);}//call_back5self.listener.on_action1(1);self.listener.on_action2(.to_string(), -1);}
}pub(crate) struct EventListenerImpl {}impl EventListener for EventListenerImpl {fn on_action1(self, code: i32) {println!(-------on_action1--------code: {}, code);}fn on_action2(self, val: String, code: i32) {println!(-------on_action2--------code: {} , val: {}, code, val);}
}pub(crate) fn t6_call_back_task() {let mut executor Executor::new();executor.set_call_back(|| {println!(-------call_back----1----);});executor.set_call_back2(|| {println!(-------call_back----2----);});executor.set_call_back3(|| {println!(-------call_back----3---);Ok(Callback executed successfully!.to_string())});executor.set_call_back4(|result: ResultString, i32| {println!(-------call_back----4----result: {:?}, result);});let event_listener Box::new(EventListenerImpl {});executor.set_call_back5(event_listener);executor.process_events();
}
