defer-lite

A Rust implementation of Go's defer statement as the defer! macro, which executes a block of code when the surrounding scope ends.

This crate focuses on providing a lightweight, high-performance, no_std implementation of the defer! macro.

Usage

Add the dependency in your Cargo.toml:

toml [dependencies] defer-lite = "1.0.0"

Examples

Simplest example:

```rust use defer_lite::defer; // import the defer! macro

fn main() { defer! { println!("Second"); } println!("First"); } ```

Multiple statements:

```rust use defer_lite::defer;

fn main() { defer! { println!("Second"); println!("Third"); } println!("First"); } ```

In Go, the defer code runs when the function exits. In this Rust implementation, the code runs when the surrounding scope ends – this makes it possible to use defer inside loops:

```rust use defer_lite::defer;

fn main() { defer! { println!("End"); } println!("Before");

for i in 0..2 {
    defer! { println!("Defer {}", i); }
    println!("Loop {}", i);
}

println!("After");

} ```

License

Licensed under MIT license, see LICENSE.md for details.