Function tao_of_rust::ch09::panics::panics

pub fn panics()

恐慌

1. 了解恐慌安全
2. catch_unwind

Base usage: 使用catch_unwind

use std::panic;
fn sum(a: i32, b: i32) -> i32{
    a + b
}
fn main() {
    let result = panic::catch_unwind(|| { println!("hello!"); });
    assert!(result.is_ok());
    let result = panic::catch_unwind(|| { panic!("oh no!"); });
    assert!(result.is_err());
   println!("{}", sum(1, 2));
}

Base usage: 使用set_hook

use std::panic;
fn sum(a: i32, b: i32) -> i32{
    a + b
}
fn main() {
    let result = panic::catch_unwind(|| { println!("hello!"); });
    assert!(result.is_ok());
    panic::set_hook(Box::new(|panic_info| {
        if let Some(location) = panic_info.location() {
            println!("panic occurred '{}' at {}",
                location.file(), location.line()
            );
       } else {
            println!("can't get location information...");
       }
   }));
   let result = panic::catch_unwind(|| { panic!("oh no!"); });
   assert!(result.is_err());
   println!("{}", sum(1, 2));
}