Function lci::eval

pub fn eval<R, W, F>(
    code: &str, 
    stdin: R, 
    stdout: W, 
    callback: F
) -> Result<(), Error> where
    R: BufRead,
    W: Write,
    F: FnOnce(&mut EvalParams<R, W>), 

Convenience function for tokenizing, parsing, and evaluating code