hazel-sec / defer-rs

golang like defer provider

defer-rs

golang-like defer provider

usage

1. add dependency into Cargo.toml

[dependencies]
defer = { git = "https://github.com/0x75960/defer-rs", branch = "master" }

2. import and use in your code

macro(recommended)

#[macro_use(defer)]
extern crate defer;

use defer::Defer;

fn main() {
    defer!({
        println!("this will appear 4th!");
    });
    defer!({
        println!("this will appear 2nd!");
        println!("this will appear 3rd!");
    });
    println!("this will appear 1st!");
}

Basic

extern crate defer;

use defer::Defer;

fn main() {
    let defer1 = Defer::register(|| -> () {
        println!("this will appear 4th!");
    });

    let defer2 = Defer::register(|| -> () {
        println!("this will appear 2nd!");
        println!("this will appear 3rd!");
    });
    println!("this will appear 1st!");
}

attention

• there are least one difference between go and this.

#	in this library	go(original)
1. executed at	leaving scope	leaving function