tarpc-cat 0.1.0

//! Project-wide error type.

/// All errors in tarpc-cat.
#[derive(Debug)]
pub enum Error {
    /// Network I/O error.
    Io(std::io::Error),
    /// Serialization failed.
    Serialize(serde_json::Error),
    /// Deserialization failed.
    Deserialize(serde_json::Error),
    /// Server returned an application-level error.
    Server {
        /// Error message from the server.
        message: String,
    },
    /// Connection was closed unexpectedly.
    ConnectionClosed,
}

impl Error {
    /// Construct from a serialization error.
    #[must_use]
    pub fn from_serialize(e: serde_json::Error) -> Self {
        Self::Serialize(e)
    }

    /// Construct from a deserialization error.
    #[must_use]
    pub fn from_deserialize(e: serde_json::Error) -> Self {
        Self::Deserialize(e)
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Io(e) => write!(f, "I/O error: {e}"),
            Self::Serialize(e) => write!(f, "serialization error: {e}"),
            Self::Deserialize(e) => write!(f, "deserialization error: {e}"),
            Self::Server { message } => write!(f, "server error: {message}"),
            Self::ConnectionClosed => write!(f, "connection closed"),
        }
    }
}

impl std::error::Error for Error {
    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
        match self {
            Self::Io(e) => Some(e),
            Self::Serialize(e) | Self::Deserialize(e) => Some(e),
            Self::Server { .. } | Self::ConnectionClosed => None,
        }
    }
}

impl From<std::io::Error> for Error {
    fn from(e: std::io::Error) -> Self {
        Self::Io(e)
    }
}