Struct ArcTokioMutexOptionalKeyPathChain 

pub struct ArcTokioMutexOptionalKeyPathChain<Root, MutexValue, InnerValue, SubValue, F, G>
where
    F: for<'r> Fn(&'r Root) -> &'r MutexValue,
    G: for<'r> Fn(&'r InnerValue) -> Option<&'r SubValue>,
{ /* private fields */ }

A composed optional async keypath chain through Arc<tokio::sync::Mutex> - functional style

Implementations

impl<Root, MutexValue, InnerValue, SubValue, F, G> ArcTokioMutexOptionalKeyPathChain<Root, MutexValue, InnerValue, SubValue, F, G>

where MutexValue: Borrow<Arc<Mutex<InnerValue>>>, F: for<'r> Fn(&'r Root) -> &'r MutexValue, G: for<'r> Fn(&'r InnerValue) -> Option<&'r SubValue>,

pub async fn get<Callback>( self, container: &Root, callback: Callback, ) -> Option<()>

where Callback: FnOnce(&SubValue),

Apply the composed keypath chain to a container (read, if value exists, async)

pub fn then<NextValue, H>( self, next: KeyPath<SubValue, NextValue, H>, ) -> ArcTokioMutexOptionalKeyPathChain<Root, MutexValue, InnerValue, NextValue, F, impl for<'r> Fn(&'r InnerValue) + 'static>

where H: for<'r> Fn(&'r SubValue) -> &'r NextValue + 'static, G: 'static, InnerValue: 'static, SubValue: 'static, NextValue: 'static,

Chain with another readable keypath through another level

pub fn chain_optional<NextValue, H>( self, next: OptionalKeyPath<SubValue, NextValue, H>, ) -> ArcTokioMutexOptionalKeyPathChain<Root, MutexValue, InnerValue, NextValue, F, impl for<'r> Fn(&'r InnerValue) + 'static>

where H: for<'r> Fn(&'r SubValue) -> Option<&'r NextValue> + 'static, G: 'static, InnerValue: 'static, SubValue: 'static, NextValue: 'static,

Chain with an optional readable keypath through another level