Struct ExtensionError 

pub struct ExtensionError { /* private fields */ }

An error that can occur during DuckDB extension initialization or registration.

This type is designed for use with the ? operator inside the extension entry point. It can be reported back to DuckDB via access.set_error.

Construction

use quack_rs::error::ExtensionError;

// From a string literal
let e = ExtensionError::from("something went wrong");

// From a String
let msg = format!("failed: {}", 42);
let e = ExtensionError::from(msg);

// Wrapping another error
let parse_err: Result<i32, _> = "not a number".parse();
let e = parse_err.map_err(ExtensionError::from_error);

Implementations

impl ExtensionError

pub fn new(message: impl Into<String>) -> Self

Creates a new ExtensionError with the given message.

Example

use quack_rs::error::ExtensionError;

let err = ExtensionError::new("registration failed");
assert_eq!(err.to_string(), "registration failed");

pub fn from_error<E: Error>(e: E) -> Self

Wraps any std::error::Error into an ExtensionError.

Example

use quack_rs::error::ExtensionError;

let result: Result<i32, _> = "abc".parse::<i32>();
let err = result.map_err(ExtensionError::from_error);
assert!(err.is_err());

pub fn to_c_string(&self) -> CString

Converts this error into a CString suitable for passing to set_error.

If the message contains a null byte (which is valid in a Rust String but not in a C string), the message is truncated at the first null byte.

Example

use quack_rs::error::ExtensionError;

let err = ExtensionError::new("oops");
let cstr = err.to_c_string();
assert_eq!(cstr.to_str().unwrap(), "oops");

pub fn as_str(&self) -> &str

Returns the error message as a string slice.

Example

use quack_rs::error::ExtensionError;

let err = ExtensionError::new("bad input");
assert_eq!(err.as_str(), "bad input");

Trait Implementations

impl Clone for ExtensionError

fn clone(&self) -> ExtensionError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExtensionError

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

Formats the value using the given formatter.

impl Display for ExtensionError

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

Formats the value using the given formatter.

impl Error for ExtensionError

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<&str> for ExtensionError

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<Box<dyn Error>> for ExtensionError

fn from(e: Box<dyn Error>) -> Self

Converts to this type from the input type.

impl From<Box<dyn Error + Send + Sync>> for ExtensionError

fn from(e: Box<dyn Error + Send + Sync>) -> Self

Converts to this type from the input type.

impl From<String> for ExtensionError

fn from(s: String) -> Self

Converts to this type from the input type.

impl PartialEq for ExtensionError

fn eq(&self, other: &ExtensionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ExtensionError

impl StructuralPartialEq for ExtensionError