Struct ArcParkingRwLockWritableOptionalKeyPathChain 

pub struct ArcParkingRwLockWritableOptionalKeyPathChain<Root, InnerValue, SubValue, F, G>
where
    F: for<'r> Fn(&'r Root) -> &'r Arc<RwLock<RawRwLock, InnerValue>>,
    G: for<'r> Fn(&'r mut InnerValue) -> Option<&'r mut SubValue>,
{ /* private fields */ }

A composed writable optional keypath chain through Arc<parking_lot::RwLock> - functional style

Implementations

impl<Root, InnerValue, SubValue, F, G> ArcParkingRwLockWritableOptionalKeyPathChain<Root, InnerValue, SubValue, F, G>

where F: for<'r> Fn(&'r Root) -> &'r Arc<RwLock<RawRwLock, InnerValue>>, G: for<'r> Fn(&'r mut InnerValue) -> Option<&'r mut SubValue>,

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

where Callback: FnOnce(&mut SubValue) -> R,

Apply the composed keypath chain to a container with mutable access (write lock, if value exists)

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

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

Monadic composition: chain with another writable keypath This allows composing deeper keypaths through the same Arc<parking_lot::RwLock> structure

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

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

Monadic composition: chain with another writable optional keypath (for Option fields) This allows composing through Option types within the same Arc<parking_lot::RwLock> structure