tylift 0.3.0

Lift enum variants to the type-level.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

use tylift::tylift;
use std::marker::PhantomData;

#[tylift]
pub enum Mode {
    Safe,
    Fast,
}

pub struct Text<M: Mode> {
    content: String,
    _marker: PhantomData<M>,
}

impl<M: Mode> Text<M> {
    pub fn into_inner(self) -> String {
        self.content
    }
}

impl Text<Safe> {
    pub fn from(content: Vec<u8>) -> Option<Self> {
        Some(Self {
            content: String::from_utf8(content).ok()?,
            _marker: PhantomData,
        })
    }
}


impl Text<Fast> {
    pub fn from(content: Vec<u8>) -> Self {
        Self {
            content: unsafe { String::from_utf8_unchecked(content) },
            _marker: PhantomData,
        }
    }
}

fn main() {
    let safe = Text::<Safe>::from(vec![0x73, 0x61, 0x66, 0x65]);
    let fast = Text::<Fast>::from(vec![0x66, 0x61, 0x73, 0x74]);
    assert_eq!(safe.map(Text::into_inner), Some("safe".to_owned()));
    assert_eq!(fast.into_inner(), "fast".to_owned());
}