example_products_labels_cli.rs

#![feature(custom_derive, core)]

extern crate core;
use std::io;
use std::io::prelude::*;
use core::fmt::Debug;

#[derive(Debug)]
struct Product {
    id: i32,
    name: &'static str,
    label: &'static str,
}

#[derive(Debug)]
struct Label {
    id: i32,
    text: &'static str,
}

fn main() {
    let p1 = Product {id: 1, name: "Awesome Gaget", label: "awesome"};
    let p2 = Product {id: 2, name: "Cool Widget", label: "cool"};
    let p3 = Product {id: 3, name: "Rad Gizmo", label: "cool"};
    let p4 = Product {id: 3, name: "Lame Thingy", label: "lame"};
    let products = vec![p1, p2, p3, p4];

    let l1 = Label {id: 1, text: "cool"};
    let l2 = Label {id: 1, text: "awesome"};
    let l3 = Label {id: 1, text: "lame"};
    let labels = vec![l1, l2, l3];

    run_cli(&products, &labels)
}

fn run_cli(products: &Vec<Product>, labels: &Vec<Label>) {
  println!("Check out these awesome products!");
  let stdin = io::stdin();
  for line in stdin.lock().lines() {
    let l = line.unwrap();
    if l == "ls products" {
      print_list(products.into_iter())
    } else if l == "ls labels" {
      print_list(labels.into_iter())
    }
  }
}

fn print_list<T: Iterator<Item=I>, I: Debug>(list: T) {
  for item in list {
    println!("{:?}", item);
  }
}