dactyl-db 0.4.0

Interchangeably read and write to local SQLite or cloud-hosted Vercel Neon instances behind a single unified facade.
Documentation 
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//! Errors returned by the Dactyl driver.

use thiserror::Error;

/// Coarse operational categories stable enough for callers to branch on.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AdapterErrorKind {
    Busy,
    Locked,
    Constraint,
    Query,
    ReadOnly,
    Storage,
    Transport,
    Protocol,
    Unknown,
}

/// The backend-neutral public error surface.
#[derive(Debug, Error)]
pub enum DactylError {
    #[error("configuration error: {0}")]
    Config(String),

    #[error("adapter error ({kind:?}): {message}")]
    Adapter {
        kind: AdapterErrorKind,
        message: String,
    },

    #[error("unsupported datastore operation: {0}")]
    UnsupportedOperation(String),

    #[error("column not found: {0}")]
    ColumnNotFound(String),

    #[error("conversion error: {0}")]
    Conversion(String),
}

impl DactylError {
    #[allow(dead_code)]
    pub(crate) fn adapter(kind: AdapterErrorKind, message: impl Into<String>) -> Self {
        Self::Adapter {
            kind,
            message: message.into(),
        }
    }
}