rdefer

A Rust crate providing defer functionality for both synchronous and asynchronous code.

Usage

Synchronous Defer

use rdefer::defer;

let _d = defer!({
    println!("This will be printed last");
});
println!("This will be printed first");

Asynchronous Defer (Feature gated)

This feature is behind the async feature flag.

To use this feature, add rdefer to your Cargo.toml with the async feature enabled:

[dependencies]
rdefer = { version = "*", features = ["async"] }

Then you can use it as follows:

use rdefer::{async_defer, exec_before_defer};
use std::sync::Arc;

let defer = async_defer!(2, async {
    println!("This will be printed last");
});

exec_before_defer!(defer, || println!("This will be printed first"));
exec_before_defer!(defer, || println!("This will be printed second"));

lib.rs:

A Rust crate providing defer functionality for both synchronous and asynchronous code.

This crate provides a defer functionality which is similar to Go's defer statement. Furthermore it also allows for asynchronous defers. This is done by using a counter which is decremented every time a defer is executed. When the counter reaches 0, the provided function is executed.