input_simplified/
lib.rs

1// a simple input crate
2
3use std::fmt::Debug;
4use std::io::{self, Write};
5use std::str::FromStr;
6
7pub struct Input<T> {
8    message: String,
9    _type: std::marker::PhantomData<T>,
10}
11
12impl<T> Input<T>
13where
14    T: FromStr,
15    T::Err: Debug,
16{
17    pub fn new() -> Self {
18        Self {
19            message: String::new(),
20            _type: std::marker::PhantomData,
21        }
22    }
23
24    pub fn message(mut self, message: &str) -> Self {
25        self.message = message.to_string();
26        self
27    }
28
29    pub fn get_input(self) -> Result<T, String> {
30        print!("{}", self.message);
31        io::stdout().flush().expect("Failed to flush stdout");
32
33        let mut input = String::new();
34        io::stdin()
35            .read_line(&mut input)
36            .expect("Failed to read line");
37
38        let input = input.trim().to_string();
39
40        match input.parse::<T>() {
41            Ok(value) => Ok(value),
42            Err(_) => Err(String::from("Not a valid input")),
43        }
44    }
45}
46
47pub fn input<T>() -> Input<T>
48where
49    T: FromStr,
50    T::Err: Debug,
51{
52    Input::new()
53}
input_simplified/lib.rs

input_simplified/
lib.rs
