Enum Error 

#[non_exhaustive]
pub enum Error {
    Connection(String),
    ConnectionWithSource {
        msg: String,
        source: Source,
    },
    Authentication,
    Query(String),
    QueryWithSource {
        msg: String,
        source: Source,
    },
    UnknownDriver(String),
    UnsupportedType(String),
    Unsupported(String),
    Schema(String),
    Config(String),
    ConfigWithSource {
        msg: String,
        source: Source,
    },
    Cancelled,
    Io(Error),
    Other(String),
}

Error returned from the core abstractions and from driver implementations.

M1: each high-level variant now has a *WithSource sibling that preserves the underlying driver error via thiserror’s #[source] chain. Callers that need to discriminate driver-specific conditions (e.g. tokio_postgres::Error::is_closed()) can downcast via std::error::Error::source() and Any::downcast_ref without requiring narwhal-core to depend on every driver crate.

The string-only variants are retained for backwards compatibility with drivers that don’t yet carry the source through; both render identically via Display, so log lines and user-facing messages are unchanged.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Connection(String)

ConnectionWithSource

Fields

msg: String

source: Source

Authentication

Query(String)

QueryWithSource

Fields

msg: String

source: Source

UnknownDriver(String)

UnsupportedType(String)

Unsupported(String)

Schema(String)

Config(String)

ConfigWithSource

Fields

msg: String

source: Source

Cancelled

Io(Error)

Other(String)

Implementations

impl Error

pub fn other(msg: impl Into<String>) -> Self

pub fn unsupported(msg: impl Into<String>) -> Self

pub fn connection_with( msg: impl Into<String>, source: impl Into<Source>, ) -> Self

Build a connection error that preserves the underlying driver error in the source() chain.

pub fn query_with(msg: impl Into<String>, source: impl Into<Source>) -> Self

Build a query error that preserves the underlying driver error in the source() chain.

pub fn config_with(msg: impl Into<String>, source: impl Into<Source>) -> Self

Build a configuration error that preserves the underlying parse / validation error in the source() chain.

pub fn find_source<T: Error + 'static>(&self) -> Option<&T>

Walk the std::error::Error::source() chain looking for a concrete driver error type. Convenience wrapper around the repeated downcast pattern.

Trait Implementations

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.