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#![cfg(feature="include_simple")]
use std::{fmt, error};

/// `pbkdf2_check` error
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub enum CheckError {
    /// Password hash mismatch, e.g. due to the incorrect password.
    HashMismatch,
    /// Invalid format of the hash string.
    InvalidFormat,
}

impl fmt::Display for CheckError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str(match *self {
            CheckError::HashMismatch => "password hash mismatch",
            CheckError::InvalidFormat => "invalid `hashed_value` format",
        })
    }
}

impl error::Error for CheckError {
    fn description(&self) -> &str {
        match *self {
            CheckError::HashMismatch => "password hash mismatch",
            CheckError::InvalidFormat => "invalid `hashed_value` format",
        }
    }
}