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use std::fmt;
use crate::TextRange;
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct SyntaxError {
pub kind: SyntaxErrorKind,
pub range: TextRange,
}
impl SyntaxError {
pub fn new(kind: SyntaxErrorKind, range: TextRange) -> SyntaxError {
SyntaxError { kind, range }
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum SyntaxErrorKind {
ParseError(ParseError),
EmptyChar,
UnclosedChar,
LongChar,
EmptyAsciiEscape,
InvalidAsciiEscape,
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ParseError(pub String);
impl fmt::Display for SyntaxErrorKind {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::SyntaxErrorKind::*;
match self {
EmptyAsciiEscape => write!(f, "Empty escape sequence"),
InvalidAsciiEscape => write!(f, "Invalid escape sequence"),
EmptyChar => write!(f, "Empty char literal"),
UnclosedChar => write!(f, "Unclosed char literal"),
LongChar => write!(f, "Char literal should be one character long"),
ParseError(msg) => write!(f, "{}", msg.0),
}
}
}
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