Trait Upgrade 

pub trait Upgrade<T> {
    type Error: Error + Send + Sync + 'static;

    // Required method
    fn upgrade(self) -> Result<T, Self::Error>;
}

This trait should be implemented for each version of the original type that is not the current one. The upgrade method is called in chains until we get to the last version of the type.

Required Associated Types

type Error: Error + Send + Sync + 'static

Required Methods

fn upgrade(self) -> Result<T, Self::Error>

Implementors

impl<T: Deprecable, U> Upgrade<U> for Deprecated<T>

type Error = DeprecatedVersionError