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use std::error::Error;
use std::fmt;

#[derive(Clone, Debug, PartialEq)]
pub enum SolventError {
    /// A cycle has been detected
    CycleDetected,
    NoSuchNode,
}

impl fmt::Display for SolventError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            SolventError::CycleDetected => write!(f, "Cycle Detected"),
            SolventError::NoSuchNode => write!(f, "No Such Node"),
        }
    }
}

impl Error for SolventError {}