byteflow 0.2.1

Library for reading/writing non-byte-aligned numeric types
Documentation 
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use std::fmt::Display;

#[derive(Debug)]
pub enum Endianness {
    BigEndian,
    LittleEndian,
}

#[derive(Debug)]
pub enum SerializerError {
    IoError(std::io::Error),
    TooManyBits,
    TooFewBits,
    ValueOutOfRange,
}

impl Eq for SerializerError {}

impl PartialEq for SerializerError {
    fn eq(&self, other: &Self) -> bool {
        match (self, other) {
            (Self::IoError(l0), Self::IoError(r0)) => l0.kind() == r0.kind(),
            _ => core::mem::discriminant(self) == core::mem::discriminant(other),
        }
    }
}

impl From<std::io::Error> for SerializerError {
    fn from(value: std::io::Error) -> Self {
        Self::IoError(value)
    }
}

impl Display for SerializerError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            SerializerError::IoError(io_error) => write!(f, "IoError({})", io_error),
            SerializerError::TooManyBits => write!(f, "TooManyBits"),
            SerializerError::TooFewBits => write!(f, "TooFewBits"),
            SerializerError::ValueOutOfRange => write!(f, "ValueOutOfRange"),
        }
    }
}

#[cfg(test)]
mod tests {

    use super::SerializerError;

    #[test]
    fn compare_enums() {
        let e1: SerializerError = std::io::Error::from(std::io::ErrorKind::NotFound).into();
        let e2: SerializerError = std::io::Error::from(std::io::ErrorKind::PermissionDenied).into();

        assert_ne!(e1, e2);
    }

    #[test]
    fn convert_to_string() {
        let e1: SerializerError = std::io::Error::from(std::io::ErrorKind::NotFound).into();
        let e2 = SerializerError::TooManyBits;
        let e3 = SerializerError::TooFewBits;
        let e4 = SerializerError::ValueOutOfRange;

        assert_eq!(
            format!("{}", e1),
            format!("IoError({})", std::io::ErrorKind::NotFound)
        );
        assert_eq!(format!("{}", e2), "TooManyBits");
        assert_eq!(format!("{}", e3), "TooFewBits");
        assert_eq!(format!("{}", e4), "ValueOutOfRange");

        assert_ne!(e1, e2);
    }
}