rustik_highlight/
error.rs

1//! Error types for grammar, theme, and registry operations.
2//!
3//! The crate intentionally exposes a small error surface: invalid source data,
4//! invalid regexes, and failed registry lookups. Lower-level parser details are
5//! collapsed here so callers can report actionable load or selection failures
6//! without depending on the JSON or regex implementation.
7
8use std::fmt;
9
10/// Highlighting error.
11#[derive(Clone, Debug, Eq, PartialEq)]
12pub enum Error {
13    /// Input could not be parsed as a valid grammar.
14    InvalidGrammar,
15    /// Input could not be parsed as a valid theme.
16    InvalidTheme,
17    /// Regex data could not be compiled.
18    InvalidRegex(String),
19    /// A named grammar was not found.
20    UnknownSyntax(String),
21    /// A named theme was not found.
22    UnknownTheme(String),
23}
24
25impl fmt::Display for Error {
26    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
27        match self {
28            Self::InvalidGrammar => f.write_str("invalid grammar"),
29            Self::InvalidTheme => f.write_str("invalid theme"),
30            Self::InvalidRegex(pattern) => write!(f, "invalid regex `{pattern}`"),
31            Self::UnknownSyntax(name) => write!(f, "unknown syntax `{name}`"),
32            Self::UnknownTheme(name) => write!(f, "unknown theme `{name}`"),
33        }
34    }
35}
36
37impl std::error::Error for Error {}
rustik_highlight/error.rs

rustik_highlight/
error.rs
