exit_safely 0.2.1

Enables exiting safely with custom exit codes while still calling `Drop` as needed. Aims for minimal magic and maximum flexibilty.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

use autocfg::AutoCfg;

fn main() {
    let ac = autocfg::new();
    stable_feature(&ac, "let_chains");
    stable_feature(&ac, "if_let_guard");
}

fn stable_feature(ac: &AutoCfg, feature: &'static str) {
    let cfg = format!("stable_{feature}");
    let code = format!(
        r#"
    #![deny(stable_features)]
    #![feature({feature})]
    "#
    );

    autocfg::emit_possibility(&cfg);
    if ac.probe_raw(&code).is_err() {
        autocfg::emit(&cfg);
    }
}