time/error/
parse.rs

1//! Error that occurred at some stage of parsing
2
3use core::fmt;
4
5use crate::error::{self, ParseFromDescription, TryFromParsed};
6use crate::internal_macros::bug;
7
8/// An error that occurred at some stage of parsing.
9#[allow(variant_size_differences)]
10#[non_exhaustive]
11#[derive(Debug, Clone, Copy, PartialEq, Eq)]
12pub enum Parse {
13    #[allow(missing_docs)]
14    TryFromParsed(TryFromParsed),
15    #[allow(missing_docs)]
16    ParseFromDescription(ParseFromDescription),
17    /// The input should have ended, but there were characters remaining.
18    #[non_exhaustive]
19    #[deprecated(
20        since = "0.3.28",
21        note = "no longer output. moved to the `ParseFromDescription` variant"
22    )]
23    UnexpectedTrailingCharacters,
24}
25
26impl fmt::Display for Parse {
27    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
28        match self {
29            Self::TryFromParsed(err) => err.fmt(f),
30            Self::ParseFromDescription(err) => err.fmt(f),
31            #[allow(deprecated)]
32            Self::UnexpectedTrailingCharacters => bug!("variant should not be used"),
33        }
34    }
35}
36
37#[cfg(feature = "std")]
38#[allow(clippy::std_instead_of_core)]
39impl std::error::Error for Parse {
40    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
41        match self {
42            Self::TryFromParsed(err) => Some(err),
43            Self::ParseFromDescription(err) => Some(err),
44            #[allow(deprecated)]
45            Self::UnexpectedTrailingCharacters => bug!("variant should not be used"),
46        }
47    }
48}
49
50impl From<TryFromParsed> for Parse {
51    fn from(err: TryFromParsed) -> Self {
52        Self::TryFromParsed(err)
53    }
54}
55
56impl TryFrom<Parse> for TryFromParsed {
57    type Error = error::DifferentVariant;
58
59    fn try_from(err: Parse) -> Result<Self, Self::Error> {
60        match err {
61            Parse::TryFromParsed(err) => Ok(err),
62            _ => Err(error::DifferentVariant),
63        }
64    }
65}
66
67impl From<ParseFromDescription> for Parse {
68    fn from(err: ParseFromDescription) -> Self {
69        Self::ParseFromDescription(err)
70    }
71}
72
73impl TryFrom<Parse> for ParseFromDescription {
74    type Error = error::DifferentVariant;
75
76    fn try_from(err: Parse) -> Result<Self, Self::Error> {
77        match err {
78            Parse::ParseFromDescription(err) => Ok(err),
79            _ => Err(error::DifferentVariant),
80        }
81    }
82}
83
84impl From<Parse> for crate::Error {
85    fn from(err: Parse) -> Self {
86        match err {
87            Parse::TryFromParsed(err) => Self::TryFromParsed(err),
88            Parse::ParseFromDescription(err) => Self::ParseFromDescription(err),
89            #[allow(deprecated)]
90            Parse::UnexpectedTrailingCharacters => bug!("variant should not be used"),
91        }
92    }
93}
94
95impl TryFrom<crate::Error> for Parse {
96    type Error = error::DifferentVariant;
97
98    fn try_from(err: crate::Error) -> Result<Self, Self::Error> {
99        match err {
100            crate::Error::ParseFromDescription(err) => Ok(Self::ParseFromDescription(err)),
101            #[allow(deprecated)]
102            crate::Error::UnexpectedTrailingCharacters => bug!("variant should not be used"),
103            crate::Error::TryFromParsed(err) => Ok(Self::TryFromParsed(err)),
104            _ => Err(error::DifferentVariant),
105        }
106    }
107}
time/error/parse.rs

time/error/
parse.rs
