rust_web_server/null/
mod.rs

1#[cfg(test)]
2mod tests;
3
4use std::fmt::{Debug, Display, Formatter};
5use std::str::FromStr;
6use crate::core::New;
7
8pub const NULL: &'static Null = &Null{};
9
10pub struct Null {}
11
12pub struct ParseNullError {
13    pub message: String
14}
15
16impl Debug for ParseNullError {
17    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
18        f.write_str(&self.message)
19    }
20}
21
22impl Display for Null {
23    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
24        f.write_str("null")
25    }
26}
27
28impl PartialEq for Null {
29    fn eq(&self, _other: &Self) -> bool {
30        true
31    }
32}
33
34impl Debug for Null {
35    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
36        f.write_str("null")
37    }
38}
39
40impl New for Null {
41    fn new() -> Self {
42        Null{}
43    }
44}
45
46impl Clone for Null {
47    fn clone(&self) -> Self {
48        Null::new()
49    }
50}
51
52impl FromStr for Null {
53    type Err = ParseNullError;
54
55    fn from_str(null: &str) -> Result<Self, Self::Err> {
56        if null.trim() != "null" {
57            let message = format!("error parsing null: {}", null);
58            return Err(ParseNullError { message })
59        }
60        Ok(Null::new())
61    }
62}
rust_web_server/null/mod.rs

rust_web_server/null/
mod.rs
