Struct GenError 

pub struct GenError(/* private fields */);

An opaque error from a strategy that could not produce a value.

It wraps the backend’s own generation error so callers do not depend on the backend’s type. In practice the simple strategies a property test uses (any::<T>(), numeric ranges) never fail to generate; this surfaces only for heavily filtered strategies that exhaust their rejection budget.

Trait Implementations

impl Clone for GenError

fn clone(&self) -> GenError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GenError

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

Formats the value using the given formatter.

impl Display for GenError

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

Formats the value using the given formatter.

impl Error for GenError

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.