Function main

14_context_manager/rust/context_manager.rs:36–44

()

}

fn main() -> io::Result<()> {
    let mut fm = FileManager::new("test.txt", 'w');
    fm.with(|f| -> io::Result<()> {
        f.write(b"Test")?;
        Ok(())
    })?;
    println!("{}", fm.closed());
    Ok(())
}