Struct wagon_utils::ConversionError

pub struct ConversionError<T, U> { /* private fields */ }

We failed to convert from some thing to another thing.

A generic error for when doing any TryFrom type implementations.

Example

use wagon_utils::ConversionError;

struct A;
impl TryFrom<i32> for A {
    type Error = ConversionError<i32, Self>;

    fn try_from(value: i32) -> Result<Self, Self::Error> {
        Err(ConversionError::new(value))
    }
}

Implementations

impl<T, U> ConversionError<T, U>

pub const fn new(subject: T) -> Self

Create a new ConversionError.

pub fn convert<V: From<U>>(self) -> ConversionError<T, V>

Convert one implementation of ConversionError to another.

More specifically, if we have a type V which implements From<U>, we can construct a new ConversionError<T,V>.

This exists for the case “We tried converting T to U, but actually we were converting T to V in this case”.

Because specialization is still not stabilized, this can not be done by a generic implementation of From.

Trait Implementations

impl<T: Debug, U: Debug> Debug for ConversionError<T, U>

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

Formats the value using the given formatter.

impl<T: Display, U> Display for ConversionError<T, U>

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

Formats the value using the given formatter.

impl<T: Display + Debug, U: Debug> Error for ConversionError<T, U>

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.