error-stack 0.2.0

A context-aware error-handling library that supports arbitrary attached user data
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

//! Example of using `attach` to set a custom exit code. Requires nightly and std feature.

use std::process::{ExitCode, Termination};

use error_stack::{Context, Report};

#[derive(Debug)]
struct CustomError;

impl Context for CustomError {}

impl std::fmt::Display for CustomError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str("Custom Error")
    }
}

fn main() -> ExitCode {
    let report = Report::new(CustomError)
        .attach(ExitCode::from(100))
        .attach_printable("this error has an exit code of 100!");

    report.report()
}