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
|
// Copyright 2022-2024 Gabriel Bjørnager Jensen.
//! Error handling.
use std::error::Error as StdError;
use std::fmt::{Display, Formatter};
/// Mapping of [`std::result::Result`].
pub type Result<T> = std::result::Result<T, Error>;
/// Denotes an error.
///
/// These variants are used when a deserialisation fails.
/// Serialisations are assumed infallible.
#[derive(Debug)]
pub enum Error {
ArrayLengthMismatch { len: usize, ok_len: usize },
EndOfDStream { len: usize, ok_len: usize },
InvalidBoolean { value: u8 },
InvalidCodePoint { value: u32 },
NullInteger,
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
use Error::*;
match *self {
ArrayLengthMismatch { len, ok_len } => {
write!(f, "expected array of length ({ok_len}) but got ({len}) elements")
},
EndOfDStream { len, ok_len } => {
write!(f, "({ok_len}) byte(s) were requested but only ({len}) byte(s) were left")
},
InvalidBoolean { value } => {
write!(f, "expected boolean but got {value:#02X}")
},
InvalidCodePoint { value } => {
write!(f, "code point U+{value:04X} is not valid")
}
NullInteger => {
write!(f, "expected non-zero integer but got (0)")
},
}
}
}
impl StdError for Error { }
|
