rustHow to get error as string in Rust

In Rust, you can get the error as a string using the to_string() method. This method is available on the std::error::Error trait, which is implemented by all types that implement the std::error::Error trait.

Code example:

use std::error::Error;

fn main() {
    let err: Box<dyn Error> = Box::new(std::io::Error::new(std::io::ErrorKind::Other, "oh no!"));
    let err_string = err.to_string();
    println!("Error as string: {}", err_string);
}

Output

Error as string: Other: oh no!

Explanation of code parts:

1. use std::error::Error;: This imports the Error trait from the std::error module.
2. let err: Box<dyn Error> = Box::new(std::io::Error::new(std::io::ErrorKind::Other, "oh no!"));: This creates a Box containing an Error instance with the ErrorKind of Other and the message "oh no!".
3. let err_string = err.to_string();: This calls the to_string() method on the Error instance, which returns the error as a string.
4. println!("Error as string: {}", err_string);: This prints the error string to the console.

Helpful links:

1. Rust Documentation - Error
2. Rust Documentation - ErrorKind

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