Struct DowncastIntoError

pub struct DowncastIntoError<'py> {
    from: Bound<'py, PyAny>,
    to: Cow<'static, str>,
}

Error that indicates a failure to convert a PyAny to a more specific Python type.

Fields

from: Bound<'py, PyAny>

to: Cow<'static, str>

Implementations

impl<'py> DowncastIntoError<'py>

pub fn new(from: Bound<'py, PyAny>, to: impl Into<Cow<'static, str>>) -> Self

Create a new DowncastIntoError representing a failure to convert the object from into the type named in to.

pub fn into_inner(self) -> Bound<'py, PyAny>

Consumes this DowncastIntoError and returns the original object, allowing continued use of it after a failed conversion.

See downcast_into for an example.

Trait Implementations

impl<'py> Debug for DowncastIntoError<'py>

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

Formats the value using the given formatter.

impl Display for DowncastIntoError<'_>

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

Formats the value using the given formatter.

impl Error for DowncastIntoError<'_>

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

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

#[doc(hidden)] fn type_id(&self, _: Internal) -> TypeId

where Self: 'static,

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

Gets the TypeId of self.

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<DowncastIntoError<'_>> for PyErr

Convert DowncastIntoError to Python TypeError.

fn from(err: DowncastIntoError<'_>) -> PyErr

Converts to this type from the input type.