thiserror_core2 2.0.1

derive(Error) (no_std-enabled using core2)
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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

#![deny(clippy::all, clippy::pedantic)]

use core2::{error::Error as _, io};
use thiserror_core2::Error;

#[derive(Error, Debug)]
#[error("...")]
pub struct ErrorStruct {
    #[from]
    source: io::Error,
}

#[derive(Error, Debug)]
#[error("...")]
pub struct ErrorStructOptional {
    #[from]
    source: Option<io::Error>,
}

#[derive(Error, Debug)]
#[error("...")]
pub struct ErrorTuple(#[from] io::Error);

#[derive(Error, Debug)]
#[error("...")]
pub struct ErrorTupleOptional(#[from] Option<io::Error>);

#[derive(Error, Debug)]
#[error("...")]
pub enum ErrorEnum {
    Test {
        #[from]
        source: io::Error,
    },
}

#[derive(Error, Debug)]
#[error("...")]
pub enum ErrorEnumOptional {
    Test {
        #[from]
        source: Option<io::Error>,
    },
}

#[derive(Error, Debug)]
#[error("...")]
pub enum Many {
    // Any(#[from] anyhow::Error),
    Io(#[from] io::Error),
}

fn assert_impl<T: From<io::Error>>() {}

#[test]
fn test_from() {
    assert_impl::<ErrorStruct>();
    assert_impl::<ErrorStructOptional>();
    assert_impl::<ErrorTuple>();
    assert_impl::<ErrorTupleOptional>();
    assert_impl::<ErrorEnum>();
    assert_impl::<ErrorEnumOptional>();
    assert_impl::<Many>();
}