Struct prae::MutationError

pub struct MutationError<W: Wrapper> {
    pub old_value: W::Inner,
    pub new_value: W::Inner,
    pub original: W::Error,
}

A wrapper-error that will be returned if the Wrapper::mutate method receives a closure that mutates the inner value in such a way that it no longer passes the Wrapper::PROCESS function.

This wrapper contains the mutated value that caused the error, the value before the mutation and the original error returned by Wrapper::PROCESS function.

Fields

old_value: W::Inner

Value before the mutation.

new_value: W::Inner

Value after mutation (the cause of the error).

original: W::Error

Original error.

Trait Implementations

impl<W: Debug + Wrapper> Debug for MutationError<W> where
    W::Inner: Debug,
    W::Inner: Debug,
    W::Error: Debug, 

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

Formats the value using the given formatter.

impl<W> Display for MutationError<W> where
    W: Wrapper,
    W::Inner: Debug,
    W::Error: Display, 

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

Formats the value using the given formatter.

impl<W> Error for MutationError<W> where
    W: Wrapper + Debug,
    W::Inner: Debug,
    W::Error: Display + Debug, 

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

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