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use thiserror::Error;
use crate::lexing::token::Span;

#[derive(Error, Debug)]
pub enum ParserError {
    #[error("Unexpected token: {0}")]
    UnexpectedToken(String, Span),
    #[error("Unexpected EOF: {0}")]
    UnexpectedEOF(String, Span),
    #[error("Lexing error: {0}")]
    LexingError(LexerError)
    // #[error("Ambiguous Expression: {0}")]
    // AmbiguousExpression(String, Span)
}

#[derive(Error, Debug)]
pub enum LexerError {
    #[error("Syntax error: {0}")]
    SyntaxError(String, Span),
    #[error("Unknown Token: {0}")]
    UnknownToken(char, Span)
}

impl From<LexerError> for ParserError {
    fn from(error: LexerError) -> Self {
        ParserError::LexingError(error)
    }
}