cargo-rush

When you're in a rush and don't feel like creating a rust file to test out small snippets of simple Rust code - simply copy the Rust code to the operating system's clipboard, next, open a terminal and run cargo rush.

Example 1: main

Step 1: Copy some Rust code to memory

Let's say that we copy the lines below to the clipboard (operating system memory).

fn main() {
    let a = 1;
    let b = 2;
    println!("{} + {} = {}", a, b, a + b);
}

Step 2:

In the terminal:

cargo install cargo-rush
cargo rush
# The command will call `rustc` on whatever is in the clipboard:
1 + 2 = 3

Example 2: Unit Tests

cargo rush can also run unit tests by using the -t flag. Let's say we have the following code on the OS clipboard:

pub fn add(left: u64, right: u64) -> u64 {
    left + right
}

fn main() {
    println!("Hello world");
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_works() {
        let result = add(2, 2);
        assert_eq!(result, 4);
    }
}

Step 1: Copy some Rust code to memory

Step 2: cargo rush -t