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use std::error::Error;
use std::fmt::{self, Display};

#[derive(Debug, PartialEq)]
pub enum ParserError {
    InvalidLanguage,
    InvalidSubtag,
}

impl Error for ParserError {}

impl Display for ParserError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let value = match self {
            ParserError::InvalidLanguage => "The given language subtag is invalid",
            ParserError::InvalidSubtag => "Invalid subtag",
        };
        f.write_str(value)
    }
}