Enum emacs::ErrorKind

pub enum ErrorKind {
    Signal {
        symbol: TempValue,
        data: TempValue,
    },
    Throw {
        tag: TempValue,
        value: TempValue,
    },
    WrongTypeUserPtr {
        expected: &'static str,
    },
}

Error types generic to all Rust dynamic modules.

This list is intended to grow over time and it is not recommended to exhaustively match against it.

Variants

Signal

Fields

symbol: TempValue

data: TempValue

An error signaled by Lisp code.

Throw

Fields

tag: TempValue

value: TempValue

A non-local exit thrown by Lisp code.

WrongTypeUserPtr

Fields

expected: &'static str

An error indicating that the given value is not a user-ptr of the expected type.

Examples:

#[defun]
fn wrap(x: i64) -> Result<RefCell<i64>> {
    Ok(RefCell::new(x))
}

#[defun]
fn wrap_f(x: f64) -> Result<RefCell<f64>> {
    Ok(RefCell::new(x))
}

#[defun]
fn unwrap(r: &RefCell<i64>) -> Result<i64> {
    Ok(*r.try_borrow()?)
}

(unwrap 7)          ; *** Eval error ***  Wrong type argument: user-ptrp, 7
(unwrap (wrap 7))   ; 7
(unwrap (wrap-f 7)) ; *** Eval error ***  Wrong type user-ptr: "expected: RefCell"

Trait Implementations

impl Debug for ErrorKind

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

Formats the value using the given formatter.

impl Display for ErrorKind

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

Formats the value using the given formatter.

impl Error for ErrorKind

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

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.