ruga_guessing_game/
lib.rs

1#![allow(unused)]
2
3use std::num::{IntErrorKind, ParseIntError};
4
5pub struct Guess {
6    pub value: i32, // not pub
7}
8
9impl Guess {
10    /* pub fn new(value: i32) -> Guess {
11        if value < 1 || value > 100 {
12            panic!("Guess value must be between 1 and 100, got {}.", value);
13        }
14        Guess { value }
15    } 不要恐慌，要控制输入值 ↓ */
16
17    pub fn new(s: &str, has_panic: bool) -> Result<Guess, ParseIntError> {
18        match s.trim().parse() {
19            Ok(i) => {
20                if i < 1 || i > 100 {
21                    if has_panic {
22                        panic!("Guess value must be between 1 and 100, got {}.", i);
23                    }
24                    println!("Guess value must be between 1 and 100, got {}.", i);
25                    // let err: Result<i32, ParseIntError> = "".parse(); // 강제 에러 발생!
26                    match "".parse::<i32>() {
27                        // Ok(n) => return Ok(Guess { value: 0 }),
28                        Err(e) => return Err(e),
29                        _ => (),
30                    }
31                }
32                Ok(Guess { value: i })
33            }
34            // Err(e) => Err(e),
35            Err(e) => {
36                if has_panic {
37                    panic!(
38                        "Parse Error : {:?}. Guess value must be between 1 and 100.",
39                        e
40                    );
41                }
42                match e.kind() {
43                    IntErrorKind::Empty => {
44                        println!("不允许空白文字，请在输入！");
45                        Err(e)
46                    }
47                    IntErrorKind::InvalidDigit => {
48                        println!("不允许整数以外的文字，请再输入！");
49                        Err(e)
50                    }
51                    other_error => {
52                        println!("发生未知错误，请在输入！");
53                        Err(e)
54                    }
55                }
56            }
57        }
58    }
59
60    pub fn value(&self) -> i32 {
61        self.value
62    }
63}
ruga_guessing_game/lib.rs

ruga_guessing_game/
lib.rs
