guix_scheme/
error.rs

1use std::fmt;
2
3#[derive(Debug)]
4pub enum Error {
5    Parse(scheme_edit::ParseError),
6    NoChannelsForm,
7    ChannelNotFound(String),
8    MissingField { record: String, field: String },
9    Invalid { field: String, reason: String },
10}
11
12impl fmt::Display for Error {
13    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
14        match self {
15            Error::Parse(e) => write!(f, "parse error: {e}"),
16            Error::NoChannelsForm => write!(f, "no `list` / `cons*` / `cons` form found"),
17            Error::ChannelNotFound(name) => write!(f, "channel `{name}` not found"),
18            Error::MissingField { record, field } => write!(f, "{record}: missing {field}"),
19            Error::Invalid { field, reason } => write!(f, "invalid {field}: {reason}"),
20        }
21    }
22}
23
24impl std::error::Error for Error {
25    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
26        match self {
27            Error::Parse(e) => Some(e),
28            _ => None,
29        }
30    }
31}
32
33impl From<scheme_edit::ParseError> for Error {
34    fn from(e: scheme_edit::ParseError) -> Self {
35        Error::Parse(e)
36    }
37}
guix_scheme/error.rs

guix_scheme/
error.rs
