34 lines
1.2 KiB
Rust
34 lines
1.2 KiB
Rust
//! This module contains the error types for the tokeniser.
|
|
|
|
#[derive(Debug, Clone, Copy)]
|
|
/// Types of errors that may be returned during tokenisation.
|
|
pub enum TokeniserError {
|
|
/// An unexpected character was found in the source code.
|
|
UnexpectedChar(char),
|
|
/// An unterminated string literal was found. [`SourceInfo`] will be attached if this
|
|
/// was returned.
|
|
UnterminatedString,
|
|
/// An invalid number format was encountered when parsing a literal value
|
|
/// ([`TokenType::Immediate`]).
|
|
InvalidNumber(&'static str),
|
|
/// An unrecognized token was encountered.
|
|
UnrecognisedToken,
|
|
}
|
|
|
|
impl TokeniserError {}
|
|
|
|
impl std::fmt::Display for TokeniserError {
|
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
|
match self {
|
|
Self::UnexpectedChar(c) => write!(f, "unexpected char '{c}' found in input")?,
|
|
Self::InvalidNumber(lit) => {
|
|
write!(f, "invalid integer literal \"{lit}\" found in input")?;
|
|
}
|
|
&Self::UnrecognisedToken => write!(f, "unrecognised token found in input")?,
|
|
&Self::UnterminatedString => write!(f, "unterminated string literal")?,
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|