Struct Config 

pub struct Config { /* private fields */ }

Implementations

impl Config

pub fn new(args: impl Iterator<Item = String>) -> Result<Config, &'static str>

Using Iterator<Item = String> as a parameter because we cannot manually create a env::Args, but we know env::Args will yield a list of strings.

example

let config = minigrep::Config::new(std::env::args()).unwrap_or_else(|err| {
    eprintln!("Problem parsing arguments: {}", err);
    std::process::exit(1);
});