Macro rivia::defer

macro_rules! defer {
    ($($tokens:tt)*) => { ... };
}

Ensure the given closure is executed once the surrounding scope closes

• Triggered despite panics
• Inspired by Golang’s defer, Java’s finally and Ruby’s ensure

Examples

use rivia::prelude::*;

let vfs = Vfs::memfs();
let file = vfs.root().mash("file");
assert_vfs_mkfile!(vfs, &file);

// Create a scope that will trigger defer's destructor
{
    defer!(vfs.remove(&file).unwrap());
}
assert_vfs_no_exists!(vfs, &file);