Trait dock_core::util::action::StorageRef
source · pub trait StorageRef<T>: Associated<T> {
// Required methods
fn try_mutate_associated<F, R, E>(self, f: F) -> Result<R, E>
where F: FnOnce(&mut Option<Self::Value>) -> Result<R, E>;
fn view_associated<F, R>(self, f: F) -> R
where F: FnOnce(Option<Self::Value>) -> R;
}Expand description
Allows to view and mutate a value associated with Self.
Required Methods§
sourcefn try_mutate_associated<F, R, E>(self, f: F) -> Result<R, E>where
F: FnOnce(&mut Option<Self::Value>) -> Result<R, E>,
fn try_mutate_associated<F, R, E>(self, f: F) -> Result<R, E>where F: FnOnce(&mut Option<Self::Value>) -> Result<R, E>,
Attempts to mutate a value associated with Self.
If the value under the option is taken, the associated value will be removed.
All updates will be applied only in case of a successful result.
sourcefn view_associated<F, R>(self, f: F) -> Rwhere
F: FnOnce(Option<Self::Value>) -> R,
fn view_associated<F, R>(self, f: F) -> Rwhere F: FnOnce(Option<Self::Value>) -> R,
Calls provided function with an associated value as an argument.