Question about Programs in Rust

12

Very nice, I might use that for some command line tools in the future!

Let me provide an updated example using rustyline. First, we need a dependency in the Cargo.toml file:

[dependencies]
rustyline = "9.1.2"

Then we can do:

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let mut rl = rustyline::Editor::<()>::new();
    let a: i32 = rl.readline("a = ")?.parse()?;
    let b: i32 = rl.readline("b = ")?.parse()?;
    let c = a + b;
    println!("{a} + {b} = {c}");
    Ok(())
}

Looks much cleaner :smiley:, plus it allows certain shortcuts such as CTRL+A to jump to the beginning of the line, etc.

Downside is a moderately sized tree of dependencies, but I think for interactive command line apps, this might be worth it.

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