Trait UpdateSource 

pub trait UpdateSource: Send + Sync {
    // Required method
    fn latest_version<'life0, 'life1, 'async_trait>(
        &'life0 self,
        package: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Option<Version>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

Source of “what’s the latest published version of package” — real production code uses CargoRegistryUpdateSource; tests inject a fake so they never make a network call.

Required Methods

fn latest_version<'life0, 'life1, 'async_trait>( &'life0 self, package: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<Version>>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl UpdateSource for CargoRegistryUpdateSource